Optical lens, camera module and electronic equipment

Abstract

The invention provides an optical lens, a camera module and electronic equipment. The optical lens comprises a reflector group, a lens group and a folding element which are sequentially arranged from an object side to an image side, and light enters the interior of the reflector group from an incident plane of the reflector group, is reflected for at least two times in the interior of the reflector group, then is emitted out of the reflector group and enters the lens group; after passing through the lens group, light enters the folding element from the incident plane of the folding element, and is emitted out of the folding element after being reflected at least once in the folding element. And through the cooperation between the folding element and the reflector group, the total length of the light path is further increased, thereby further facilitating the realization of long-focus end shooting of the optical lens. Besides, the total length of the light path is increased by the reflector group and the folding element through reflection, the overall physical length and height of the optical lens can be further kept short, the total optical length of the system of the camera module is not easy to obviously increase, and miniaturization of the camera module is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of lenses, in particular to an optical lens, a camera module and an electronic device. BACKGROUND

[0002] With the continuous development of portable electronic devices such as mobile phones, users have higher and higher requirements for the shooting performance of the optical lens of the portable electronic device. In order to meet the needs of users to shoot distant objects, long-focus camera modules have become an indispensable part of electronic devices. However, since shooting distant objects requires long-focus camera modules to have a large optical path, the existing long-focus camera modules have a high shoulder height and a large volume, which is not conducive to the miniaturization of long-focus camera modules. SUMMARY

[0003] The present application provides an optical lens, a camera module and an electronic device which can realize long-focus shooting and miniaturization.

[0004] In a first aspect, the present application provides an optical lens. The optical lens comprises, in order from an object side to an image side, a mirror group, a lens group and a folding element; the mirror group comprises an incident surface and an exit surface, the exit surface of the mirror group is arranged to face the lens group, light enters the inside of the mirror group from the incident surface of the mirror group, and after at least two reflections in the inside of the mirror group, the light exits the mirror group from the exit surface of the mirror group and enters the lens group; the folding element comprises an incident surface and an exit surface, the incident surface of the folding element is arranged to face the lens group, after passing through the lens group, light enters the inside of the folding element from the incident surface of the folding element, and after at least one reflection in the folding element, the light exits the folding element from the exit surface of the folding element.

[0005] It can be understood that the mirror group can turn the light entering the inside of the optical lens, and the light can be reflected at least twice in the inside of the mirror group. On the one hand, the total length of the light path is increased, which is conducive to realizing long-focus shooting of the optical lens; on the other hand, the total length of the optical path is increased by reflection, which can reduce the physical length and height of the optical lens, which is conducive to realizing compact setting of the optical lens, thereby reducing the height of the optical lens and realizing miniaturization of the optical lens.

[0006] It can be understood that the light rays converged through the lens group are reflected at least once in the folding element, and the folding element can increase the total length of the optical path. Through the cooperation between the folding element and the mirror group, the total length of the optical path is further increased, thereby further facilitating the long focal end shooting of the optical lens. In addition, since the folding element increases the total length of the optical path through reflection, the physical length and height of the optical lens as a whole can be further kept short, and the system optical total length of the camera module is not easily significantly increased, which is conducive to further reducing the height of the optical lens, thereby realizing the miniaturization of the optical lens.

[0007] In a possible implementation, the optical lens satisfies: 0.2 < RBL / EFL < 1.1, where RBL is the back focal length of the mirror group, and EFL is the focal length of the optical lens.

[0008] It can be understood that by limiting the ratio of the back focal length RBL of the mirror group to the focal length EFL of the optical lens to be within the range of 0.2 to 1.1, it is ensured that the mirror group has space for the light rays to be reflected at least twice, and the optical lens has sufficient space to arrange the lens groups, so that the optical lens has a higher magnification, and the super-telephoto shooting performance of the optical lens is better. In particular, when the ratio of the back focal length RBL of the mirror group to the focal length EFL of the optical lens is close to 0.2, the super-telephoto shooting performance of the optical lens is better.

[0009] In a possible implementation, the optical lens satisfies: FOV < 50°, where FOV is the full field of view of the optical lens.

[0010] It can be understood that by limiting the full field of view FOV of the optical lens to be within the range of less than or equal to 50°, the distortion and distortion of the image edge are reduced or avoided, and the full field of view FOV of the optical lens is smaller, the field of view of the optical lens is smaller, and the optical magnification is larger, which can better meet the super-telephoto design of the optical lens.

[0011] In a possible implementation, the optical lens satisfies: LD / LRD > 1.5, where LD is the maximum light passing diameter of the region through which the light rays pass the object side surface of the mirror group, and LRD is the maximum light passing diameter of the region through which the light rays exit the image side surface of the mirror group.

[0012] It can be understood that by limiting the ratio of the maximum light passing diameter LD of the region through which the light rays pass the object side surface of the mirror group to the maximum light passing diameter LRD of the region through which the light rays exit the image side surface of the mirror group to be greater than 1.5, the light rays reflected by the mirror group are contracted, the height of the optical lens is reduced, which is conducive to reducing the shoulder height of the optical lens, thereby facilitating the miniaturization of the optical lens.

[0013] In a possible implementation, the lens set includes a first lens, and the first lens is located on an image side of the mirror set; and the optical lens satisfies: LD / RD>1.1, where RD is a maximum light passing diameter of a region through which the light passes the first lens.

[0014] It can be understood that, by limiting the ratio of the maximum light passing diameter LD of the region through which the light passes the object side surface of the mirror set to the maximum light passing diameter RD of the region through which the light passes the first lens to be greater than 1.1, the light reflected by the mirror set is contracted, the light is intercepted, and the off-axis aberration is corrected.

[0015] In a possible implementation, the optical lens satisfies: CTR / LD<0.7, where CTR is a thickness of the mirror set.

[0016] It can be understood that, by limiting the ratio of the thickness CTR of the mirror set to the maximum light passing diameter LD of the region through which the light passes the object side surface of the mirror set to be less than 0.7, the light reflected by the mirror set is contracted, the height of the optical lens is reduced, the shoulder height of the optical lens is reduced, and the miniaturization of the optical lens is facilitated.

[0017] In a possible implementation, the optical lens satisfies: 0.6<DOR / IH<5, where DOR is a maximum reflection light diameter of a region closest to the object side on which reflection occurs on the mirror set, and IH is an image height of the optical lens.

[0018] It can be understood that, by limiting the ratio of the maximum reflection light diameter DOR of the region closest to the object side on which reflection occurs on the mirror set to the image height IH of the optical lens to be in a range from 0.6 to 5, the obstruction of the on-axis light is reduced, the loss of the light is reduced, and the imaging quality of the optical lens is improved.

[0019] In a possible implementation, the folding element satisfies: -1<HP-1.25xIHxtan(PA)<5, where HP is a height of the folding element in a height direction of the optical lens, and PA is an angle of a smallest acute angle inside the folding element.

[0020] It can be understood that, by limiting HP-1.25xIHxtan(PA) to be in a range from -1 to 5, the folded optical path is facilitated, the volume of the optical lens is reduced, and the miniaturization of the optical lens is facilitated.

[0021] In a possible implementation, the folding element satisfies: Vd>15, where Vd is an Abbe number of the folding element.

[0022] It can be understood that the Abbe number of the folding element is larger, the folding element can have higher light receiving efficiency and transmittance, the light quantity in the optical path can be increased, and thus the brightness and clarity of imaging can be enhanced, the resolution of the optical lens can be enhanced, optical distortion and color distortion can be reduced, and when the optical lens is applied to the camera module and the electronic device, the imaging quality of the camera module and the electronic device is better.

[0023] In a possible implementation, the entrance surface of the mirror group is located on the object side of the mirror group, and the exit surface of the mirror group is located on the image side of the mirror group; after the light enters the mirror group, the first reflection of the light in the mirror group is located on the image side of the second reflection of the light in the mirror group.

[0024] It can be understood that the mirror group can fold the light entering the inside of the optical lens, and the light can be reflected twice inside the mirror group. On the one hand, the total length of the light path is increased, which is conducive to realizing long-focus shooting of the optical lens. On the other hand, the total length of the light path is increased by reflection, which can reduce the physical length and height of the optical lens, is conducive to realizing compact arrangement of the optical lens, and thus is conducive to reducing the height of the optical lens, and further realizing miniaturization of the optical lens.

[0025] In a possible implementation, the mirror group includes a first reflection surface, the first reflection surface of the mirror group is the region closest to the image side on the mirror group where reflection occurs, and the first reflection surface of the mirror group is curved towards the object side.

[0026] It can be understood that the first reflection surface of the mirror group curved towards the object side can contract the light and correct on-axis aberration, thereby improving the imaging quality of the optical lens.

[0027] In a possible implementation, the mirror group includes a second reflection surface, the second reflection surface of the mirror group is the region closest to the object side on the mirror group where reflection occurs, and the second reflection surface of the mirror group is curved towards the object side.

[0028] It can be understood that the second reflection surface of the mirror group curved towards the object side can modulate the imaging field of view and correct off-axis aberration, thereby improving the imaging quality of the optical lens.

[0029] In a possible implementation, the folding element includes oppositely arranged top and bottom surfaces, the top surface of the folding element faces the exit surface of the mirror group, and the entrance surface of the folding element and the exit surface of the folding element are both located on the top surface of the folding element; the folding element further includes a first reflection surface and a second reflection surface, the first reflection surface of the folding element and the second reflection surface of the folding element connect the top surface of the folding element and the bottom surface of the folding element; after the light enters the folding element, the light is reflected on the first reflection surface of the folding element, the top surface of the folding element, and the second reflection surface of the folding element.

[0030] It can be understood that the light can be reflected multiple times on the top surface, the first reflecting surface and the second reflecting surface of the folding element, and the folding element can increase the total length of the optical path. The folding element can be matched with the mirror group, and the total length of the optical path is further increased, thereby further facilitating the long-focus end shooting of the optical lens. In addition, since the folding element increases the total length of the optical path by reflection, the physical length and height of the optical lens as a whole can be kept short, thereby facilitating the reduction of the height of the optical lens and the miniaturization of the optical lens.

[0031] In a possible implementation, the folding element includes a top surface and a bottom surface arranged oppositely, the entrance surface of the folding element is located on the top surface of the folding element, and the exit surface of the folding element is located on the second surface of the folding element; the folding element further includes a first reflecting surface and a second reflecting surface, the first reflecting surface and the second reflecting surface connect the top surface of the folding element and the bottom surface of the folding element; after the light enters the folding element, the light is reflected on the first reflecting surface of the folding element, the top surface of the folding element, the bottom surface of the folding element and the second reflecting surface of the folding element.

[0032] It can be understood that the light can be reflected multiple times on the top surface, the first reflecting surface and the second reflecting surface of the folding element, and the folding element can increase the total length of the optical path. The folding element can be matched with the mirror group, and the total length of the optical path is further increased, thereby further facilitating the long-focus end shooting of the optical lens. In addition, since the folding element increases the total length of the optical path by reflection, the physical length and height of the optical lens as a whole can be kept short, thereby facilitating the reduction of the height of the optical lens and the miniaturization of the optical lens.

[0033] In a possible implementation, the folding element includes a first surface, a second surface and a reflecting surface, the first surface of the folding element connects the second surface of the folding element, and the reflecting surface of the folding element connects the first surface of the folding element and the second surface of the folding element, the first surface of the folding element faces the lens group, the entrance surface of the folding element is located on the first surface of the folding element, and the exit surface of the folding element is located on the second surface of the folding element; after the light enters the folding element, the light is reflected on the second surface of the folding element and the reflecting surface of the folding element.

[0034] It can be understood that the light can be reflected multiple times on the top surface, the first reflecting surface and the second reflecting surface of the folding element, and the folding element can increase the total length of the optical path. The folding element can be matched with the mirror group, and the total length of the optical path is further increased, thereby further facilitating the long-focus end shooting of the optical lens. In addition, since the folding element increases the total length of the optical path by reflection, the physical length and height of the optical lens as a whole can be kept short, thereby facilitating the reduction of the height of the optical lens and the miniaturization of the optical lens.

[0035] In a possible implementation, the folding element includes a first sub-folding element and a second sub-folding element, and the first sub-folding element is fixedly connected to the second sub-folding element. The first sub-folding element includes a first surface, a second surface, and a reflection surface, the first surface of the first sub-folding element is connected to the second surface of the first sub-folding element and the reflection surface of the first sub-folding element, the first surface of the first sub-folding element faces the lens group, and the incident surface of the folding element is located on the first surface of the first sub-folding element. The second sub-folding element includes a first surface, a second surface, and a reflection surface, the second surface of the second sub-folding element is connected to the first surface of the second sub-folding element and the reflection surface of the second sub-folding element, the first surface of the second sub-folding element faces the second surface of the first sub-folding element, and the exit surface of the folding element is located on the second surface of the second sub-folding element. After the light enters the first sub-folding element, the light is reflected on the second surface of the first sub-folding element, the reflection surface of the first sub-folding element, and the first surface of the first sub-folding element, and then exits the first sub-folding element from the second surface of the first sub-folding element and enters the second sub-folding element from the first surface of the second sub-folding element. The light is reflected on the reflection surface of the second sub-folding element and the first surface of the second sub-folding element.

[0036] It can be understood that the light can be reflected multiple times on the first surface of the first sub-folding element, the second surface of the first sub-folding element, the reflection surface of the first sub-folding element, the first surface of the second sub-folding element, and the reflection surface of the second sub-folding element, and the folding element can increase the total length of the optical path. The folding element can cooperate with the mirror group, and the total length of the optical path is further increased, thereby further facilitating the implementation of the long-focus end shooting of the optical lens. In addition, since the folding element increases the total length of the optical path by reflection, the physical length and height of the optical lens as a whole can be kept short, thereby facilitating the reduction of the height of the optical lens and the miniaturization of the optical lens.

[0037] In a possible implementation, the lens group includes a light conversion element and one or more lenses, and the one or more lenses are located on the image side of the light conversion element. The light conversion element is configured to change the optical axis in a first direction to an optical axis in a second direction, and the first direction is different from the second direction. The light conversion element includes an incident surface, an exit surface, and a reflection surface. The incident surface of the light conversion element is connected to the exit surface of the light conversion element, and the reflection surface of the light conversion element is connected to the incident surface of the light conversion element and the exit surface of the light conversion element. The incident surface of the light conversion element faces the exit surface of the mirror group, and the exit surface of the light conversion element faces the one or more lenses. The light reflected by the mirror group enters the inside of the light conversion element from the incident surface of the light conversion element, is reflected on the reflection surface of the light conversion element, and then exits the light conversion element from the exit surface of the light conversion element and enters the one or more lenses.

[0038] It can be understood that the light turning path element changes the optical axis in the first direction to the second direction, which can reduce the height of the optical lens in the first direction, is conducive to reducing the shoulder height of the optical lens, and is conducive to realizing the miniaturization of the optical lens.

[0039] It can be understood that the light turning path element can cooperate with the mirror group and the folding element, and the total length of the optical path is further increased, thereby further facilitating the long focal end shooting of the optical lens. In addition, since the light turning path element increases the total length of the optical path by reflection, the physical length and height of the optical lens as a whole can be kept short, which is conducive to reducing the height of the optical lens, thereby realizing the miniaturization of the optical lens.

[0040] In a second aspect, the present application provides an optical lens. The optical lens comprises a mirror group and a lens group arranged in sequence from an object side to an image side, the lens group comprising a first lens and a light turning path element, the first lens being located on the image side of the light turning path element; the mirror group comprises an entrance surface and an exit surface, the light turning path element comprises an entrance surface, an exit surface and a reflection surface, the entrance surface of the light turning path element is connected to the exit surface of the light turning path element, the reflection surface of the light turning path element is connected to the entrance surface of the light turning path element and the exit surface of the light turning path element, and the exit surface of the mirror group is arranged to face the entrance surface of the light turning path element; light rays enter the interior of the mirror group from the entrance surface of the mirror group, are reflected at least twice in the interior of the mirror group, exit the mirror group from the exit surface of the mirror group, enter the light turning path element, are reflected on the reflection surface of the light turning path element, change from a first direction to a second direction, and exit the light turning path element from the exit surface of the light turning path element to enter the first lens, the first direction intersecting the second direction.

[0041] It can be understood that the light turning path element changes the optical axis in the first direction to the second direction, which can reduce the height of the optical lens in the first direction, is conducive to reducing the shoulder height of the optical lens, and is conducive to realizing the miniaturization of the optical lens.

[0042] It can be understood that the light turning path element can cooperate with the mirror group and the folding element, and the total length of the optical path is further increased, thereby further facilitating the long focal end shooting of the optical lens. In addition, since the light turning path element increases the total length of the optical path by reflection, the physical length and height of the optical lens as a whole can be kept short, which is conducive to reducing the height of the optical lens, thereby realizing the miniaturization of the optical lens.

[0043] In a possible implementation manner, the optical lens satisfies: 0.2 < RBL / EFL < 1.1, where RBL is the back focal length of the mirror group, and EFL is the focal length of the optical lens.

[0044] It can be understood that by limiting the ratio of the back focal length RBL of the mirror group to the focal length EFL of the optical lens to be within the range of 0.2 to 1.1, it is ensured that the inside of the mirror group has space for light to be reflected at least twice, and the optical lens has sufficient space to arrange the lens groups, so that the optical lens has a higher magnification, and the super-telephoto shooting performance of the optical lens is better. In particular, when the ratio of the back focal length RBL of the mirror group to the focal length EFL of the optical lens is close to 1, the super-telephoto shooting performance of the optical lens is better.

[0045] In a possible implementation, the optical lens satisfies: FOV≤50°, where FOV is the full field of view angle of the optical lens.

[0046] It can be understood that by limiting the full field of view angle FOV of the optical lens to be within the range of less than or equal to 50°, the distortion and distortion of the image edge are reduced or avoided, and the full field of view angle FOV of the optical lens is smaller, the field of view of the optical lens is smaller, and the optical magnification is larger, which can better meet the super-telephoto design of the optical lens.

[0047] In a possible implementation, the optical lens satisfies: LD / RD>1.1, where LD is the maximum light passing diameter of the area through which the light passes the object side of the mirror group, and RD is the maximum light passing diameter of the area through which the light passes the first lens.

[0048] It can be understood that by limiting the ratio of the maximum light passing diameter LD of the area through which the light passes the object side of the mirror group to the maximum light passing diameter RD of the area through which the light passes the first lens to be greater than 1.1, the light reflected by the mirror group is contracted, the light is intercepted, and the off-axis aberration is corrected.

[0049] In a possible implementation, the optical lens satisfies: LD / LRD>1.5, where LRD is the maximum light passing diameter of the area through which the light exits the image side of the mirror group.

[0050] It can be understood that by limiting the ratio of the maximum light passing diameter LD of the area through which the light passes the object side of the mirror group to the maximum light passing diameter LRD of the area through which the light exits the image side of the mirror group to be greater than 1.5, the light reflected by the mirror group is contracted, the height of the optical lens is reduced, which is beneficial to reduce the shoulder height of the optical lens, thereby facilitating the miniaturization of the optical lens.

[0051] In a possible implementation, the optical lens satisfies: CTR / LD<0.7, where CTR is the thickness of the mirror group.

[0052] It can be understood that by limiting the ratio of the thickness CTR of the mirror group to the maximum light passing diameter LD of the area of the object side surface of the mirror group through which the light passes to be less than 0.7, the light reflected by the mirror group is contracted, the height of the optical lens is reduced, the shoulder height of the optical lens is reduced, and the miniaturization of the optical lens is facilitated.

[0053] In a possible implementation, the optical lens satisfies: 0.6 < DOR / IH < 5, where DOR is the maximum reflection diameter of the area closest to the object side of the mirror group where the light is reflected, and IH is the image height of the optical lens.

[0054] It can be understood that by limiting the ratio of the maximum reflection diameter DOR of the area closest to the object side of the mirror group where the light is reflected to the image height IH of the optical lens to be within the range of 0.6 to 5, the obstruction of the on-axis light is reduced, the loss of light is reduced, and the imaging quality of the optical lens is improved.

[0055] In a possible implementation, the entrance surface of the mirror group is located on the object side surface of the mirror group, and the exit surface of the mirror group is located on the image side surface of the mirror group; after the light enters the mirror group, the first reflection of the light in the mirror group is located on the image side of the second reflection of the light in the mirror group.

[0056] It can be understood that the mirror group can turn the light entering the inside of the optical lens, and the light can be reflected twice inside the mirror group. On the one hand, the total length of the light path is increased, and the long focal end shooting of the optical lens is facilitated. On the other hand, the total length of the light path is increased by reflection, the physical length and the height of the optical lens are reduced, the compact setting of the optical lens is facilitated, the height of the optical lens is reduced, and the miniaturization of the optical lens is facilitated.

[0057] In a third aspect, the present application provides a camera module. The camera module includes an image sensor and the optical lens described above, and the image sensor is located on the image side of the optical lens.

[0058] It can be understood that the shoulder height of the camera module is small, and the volume is small, and the miniaturization of the camera module is facilitated. In addition, the long focal shooting performance of the camera module is good.

[0059] In a possible implementation, the camera module satisfies: LEL / TTL < 0.6, where TTL is the total system optical length of the camera module.

[0060] It can be understood that, by limiting the distance between the object side of the mirror group and the image side of the last lens of the lens group arranged at least partially along the first direction, or the ratio of the distance LEL between the object side of the mirror group and the image side of the mirror group to the total system optical length TTL of the camera module in the range less than 0.6, the height of the optical lens and the camera module is reduced, which is beneficial to reduce the shoulder height of the optical lens and the camera module, thereby facilitating the miniaturization of the optical lens and the camera module.

[0061] In a possible implementation, the camera module satisfies: 0.2 < LEL / LH < 0.9, where LEL is the distance between the object side of the mirror group and the image side of the last lens of the lens group arranged at least partially along the first direction, or the distance between the object side of the mirror group and the image side of the mirror group when the lens group is arranged along the second direction, and LH is the height of the camera module, the first direction is the optical axis direction of the mirror group, and the second direction is different from the first direction.

[0062] It can be understood that, by limiting the distance between the object side of the mirror group and the image side of the last lens of the lens group arranged at least partially along the first direction, or the ratio of the distance LEL between the object side of the mirror group and the image side of the mirror group to the height LEL of the camera module in the range of 0.2 to 0.9, the height of the camera module is reduced, which is beneficial to reduce the shoulder height of the camera module, thereby facilitating the miniaturization of the camera module.

[0063] In a fourth aspect, the present application provides an electronic device. The electronic device includes an image processor and the camera module described above, the image processor is in communication connection with the camera module, and the image processor is configured to acquire image data from the camera module and process the image data.

[0064] It can be understood that the electronic device has a smaller shoulder height and a smaller volume, which is beneficial to realize the miniaturization of the electronic device. In addition, the electronic device has better long-focus shooting performance. BRIEF DESCRIPTION OF DRAWINGS

[0065] Figure 1A FIG. 1 is a structural schematic diagram of an electronic device in an embodiment provided by the present application;

[0066] Figure 1B FIG. 1 is a structural schematic diagram of an electronic device in an embodiment provided by the present application; Figure 1A FIG. 1 is a structural schematic diagram of an electronic device in an embodiment provided by the present application;

[0067] Figure 2 FIG. 1 is a structural schematic diagram of an electronic device in an embodiment provided by the present application; Figure 1B FIG. 1 is a structural schematic diagram of an electronic device in an embodiment provided by the present application; FIG. 1 is a structural schematic diagram of an electronic device in an embodiment provided by the present application;

[0068] Figure 3 is a simulation effect diagram of the telephoto end of the camera module of the first embodiment;

[0069] Figure 4 is a simulation effect diagram of the telephoto end of the camera module of the first embodiment Figure Two ;

[0070] Figure 5 is a simulation effect diagram of the telephoto end of the camera module of the first embodiment Figure Three ;

[0071] Figure 6 is a partial structure simplified schematic diagram of the camera module shown in another embodiment; Figure 1B

[0072] Figure 7 is a simulation effect diagram of the telephoto end of the camera module of the second embodiment;

[0073] Figure 8 is a simulation effect diagram of the telephoto end of the camera module of the second embodiment Figure Two ;

[0074] Figure 9 is a simulation effect diagram of the telephoto end of the camera module of the second embodiment Figure Three ;

[0075] Figure 10 is a partial structure simplified schematic diagram of the camera module shown in another embodiment Figure 1B ; Figure Two

[0076] Figure 11 is a simulation effect diagram of the telephoto end of the camera module of the third embodiment;

[0077] Figure 12 is a simulation effect diagram of the telephoto end of the camera module of the third embodiment Figure Two ;

[0078] Figure 13 is a simulation effect diagram of the telephoto end of the camera module of the third embodiment Figure Three ;

[0079] Figure 14 is a partial structure simplified schematic diagram of the camera module shown in another embodiment Figure 1B ; Figure Three

[0080] Figure 15 is a simulation effect diagram of the telephoto end of the camera module of the fourth embodiment;

[0081] ​​​Figure 16 is a simulation effect of the telephoto end of the camera module of the fourth implementation Figure Two ;

[0082] Figure 17 is a simulation effect of the telephoto end of the camera module of the fourth implementation Figure Three ;

[0083] Figure 18 is Figure 1B is a partial structure simplified schematic of the camera module shown in another implementation Figure Four ;

[0084] Figure 19 is a simulation effect of the telephoto end of the camera module of the fifth implementation

[0085] Figure 20 is a simulation effect of the telephoto end of the camera module of the fifth implementation Figure Two ;

[0086] Figure 21 is a simulation effect of the telephoto end of the camera module of the fifth implementation Figure Three ;

[0087] Figure 22 is Figure 1B is a partial structure simplified schematic of the camera module shown in another implementation Figure Five ;

[0088] Figure 23 is a simulation effect of the telephoto end of the camera module of the sixth implementation

[0089] Figure 24 is a simulation effect of the telephoto end of the camera module of the sixth implementation Figure Two ;

[0090] Figure 25 is a simulation effect of the telephoto end of the camera module of the sixth implementation Figure Three ;

[0091] Figure 26 is Figure 1B is a partial structure simplified schematic of the camera module shown in another implementation Figure Six ;

[0092] Figure 27 is a simulation effect of the telephoto end of the camera module of the seventh implementation

[0093] Figure 28 is a simulation effect of the telephoto end of the camera module of the seventh implementation Figure Two ;

[0094] Figure 29 Simulation effect of the tele end of the camera module of the seventh implementation Figure Three . DETAILED DESCRIPTION

[0095] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

[0096] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms “mount”, “connect”, “joint” should be understood in a broad sense, for example, “connect” can be detachable connection, or can be non-detachable connection; can be direct connection, or can be indirect connection through an intermediate medium; can be electrical connection, or can be mechanical connection. Among them, “fixed connection” refers to the connection of each other and the relative position relationship after connection does not change.

[0097] The orientation terms mentioned in the embodiments of the present application, such as “inner”, “outer” and the like, are only the direction of the drawings, therefore, the orientation terms used are for better and clearer illustration and understanding of the embodiments of the present application, and are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the embodiments of the present application. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0098] The terms “first”, “second”, and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by “first”, “second” and the like are generally of one kind and do not limit the number of objects, for example, the first object can be one or more. In addition, “and / or” in the specification and claims means at least one of the connected objects, and the character “ / ” generally represents an “or” relationship between the front and rear associated objects. “Multiple” means at least two.

[0099] To facilitate the understanding of the optical lens and camera module provided in the embodiments of the present application, the related terms involved in the present application are explained:

[0100] Optical axis is an axis passing through the center of each lens.

[0101] With the lens as the boundary, the side where the object is located is called the object side, and the surface of the lens close to the object side is called the object side surface.

[0102] With the lens as the boundary, the side where the image of the object is located is called the image side, and the surface of the lens close to the image side is called the image side surface.

[0103] Focal Length, also known as focal length, is a measure of the convergence or divergence of light in an optical system, which refers to the vertical distance from the optical center of the lens or optical component to the focal plane when an infinite scene passes through the lens or optical component to form a clear image on the focal plane. From a practical point of view, it can be understood as the distance from the lens center to the imaging plane. For a fixed focus lens, the position of the optical center is fixed.

[0104] The focal length (Effect Focal Length, EFL) of the optical lens is defined as the distance from the center of the optical lens to the focal point.

[0105] The rear focal length (Rear Back Focal Length, RBL) of the reflector group is defined as the distance from the image side of the reflector group to its back focal point (i.e. the image focal plane).

[0106] The lens element length (Lens Element Length, LEL) of the optical lens is defined as the physical length of a single optical lens or lens element. This length usually refers to the thickness of the lens measured along the optical axis, i.e. the distance from the object side of the lens to the image side.

[0107] The lens height (Lens Height, LH) of the camera module is defined as the height of the camera module in the first direction, wherein the first direction is the optical axis direction of the reflector group.

[0108] The lens diameter (Lens Diameter, LD) of the reflector group is defined as the maximum diameter of the light passing through the area of the object side of the reflector group, usually the effective diameter of the object side of the reflector group.

[0109] The lens diameter (Radial Diameter, RD) of the optical lens is defined as the maximum diameter of the light passing through the maximum area of the lens, usually the effective diameter of the lens.

[0110] The total track length (Total Track Length, TTL) is defined as the distance from the object side to the image side in the direction of the central field of view, and the central light ray passes between the object side of the lens closest to the object and the imaging surface of the camera module.

[0111] The thickness of the lens of the reflector (Center Thickness of Reflector, CTR) refers to the thickness of the lens of the reflector in the optical axis direction from the object side to the image side.

[0112] The lateral radius of the diaphragm (LRD) of a mirror group is defined as the maximum diameter of the area on the image side of the mirror group where light rays exit, i.e., the maximum lateral dimension of the optical surface that can act as a reflector, and is usually referred to as the effective diameter of the exit pupil of the mirror group.

[0113] The diameter of reflector (DOR) of the object side of a mirror group is defined as the maximum diameter of the area on the mirror group closest to the object side where reflection occurs.

[0114] The Abbe number (Vd) is the ratio of the difference in refractive index of an optical material at different wavelengths, and represents the degree of dispersion of the material.

[0115] The height of the prism (HP) is defined as the vertical height of a light folding element from the bottom to the top. A light folding element is an optical device used to change the path of light, and is often used in compact optical systems to reduce the physical length of the system. A light folding element can be a mirror, a prism, or other components that can change the path of a light beam. For a simple plane mirror, this height is one of the side lengths of the mirror. For a complex prism or other folding structure, this height can be the maximum distance along the optical axis.

[0116] The prism angle (PA) is defined as the angle of the smallest acute angle inside a prism. This angle determines the angle by which a light beam is deflected after passing through the element.

[0117] The imaging height (IH) is the half of the diagonal length of the active pixel area on the image sensor, i.e., the radius of the imaging circle.

[0118] The telephoto end is the longest focal length segment of the lens, i.e., the telephoto end, which has the smallest angle of view and is used for shooting distant scenes, especially close-up shots.

[0119] The F-number (Fno) is a relative value derived from the focal length of the lens divided by the diameter of the lens aperture (the inverse of the relative aperture). The smaller the F-number, the more light enters in the same unit of time. The larger the F-number, the smaller the aperture, the greater the depth of field, and the less obvious the blurring effect of the shot.

[0120] Full field of view (FOV), in optical instruments, is the angle formed by the two edges of the maximum range of the object image that can pass through the lens of the optical instrument, with the lens as the vertex. The size of the full field of view determines the field of view of the optical instrument. The larger the full field of view, the larger the field of view, and the smaller the optical magnification.

[0121] Longitudinal spherical aberration (LSA), also known as longitudinal chromatic aberration or positional chromatic aberration or axial aberration, is a common aberration in optical systems. It describes the phenomenon that light from different regions of a lens or mirror will not focus on the same plane after refraction or reflection, resulting in image blurring. Specifically, longitudinal spherical aberration refers to the deviation of image points along the optical axis, so that light rays of different incident angles will focus at different positions, i.e., light rays from different regions will not converge at the same focal point, but will form a series of focal points along the optical axis, so that the image planes of different colors cannot coincide, and the polychromatic light will spread out to form chromatic dispersion.

[0122] Astigmatism, due to the fact that the object point is not on the optical axis of the optical system, the light beam emitted by it has a tilt angle with the optical axis. After refraction by the lens, the convergence points of the meridional pencil and the tangential pencil are not on the same point. That is, the light beam cannot be focused on a point, and the image is not clear, so astigmatism occurs. Meridional pencil and tangential pencil are the names of light beams in two perpendicular planes in a rotationally symmetric optical system.

[0123] Astigmatic field curves, in optical systems, describe the change in focal plane position caused by astigmatism. Astigmatism is a common optical aberration that causes light rays passing through an optical system to focus at different positions in the vertical and horizontal directions, resulting in two different focal planes in the image: one called the sagittal plane and the other called the tangential plane.

[0124] Meridional plane, the plane formed by the principal ray (principal beam) of an object point outside the optical axis and the optical axis, is called the meridional plane.

[0125] Sagittal surface, the plane passing through the principal ray (principal beam) of an object point outside the optical axis and perpendicular to the meridional plane, is called the sagittal surface.

[0126] Curvature of field is used to indicate the difference in the position of the sharpest image point on the optical axis between the central field and the non-central field after the light rays pass through the optical lens group. When the lens has curvature of field, the intersection of the entire light beam does not coincide with the ideal image point, although a sharp image point can be obtained at each specific point, but the entire image plane is a curved surface.

[0127] Distortion, also known as distortion, is the degree of distortion of the image formed by the optical system relative to the object itself. Distortion is caused by the influence of the stop spherical aberration, and the intersection height of the chief ray of different fields after passing through the optical system is not equal to the ideal image height, and the difference between the two is the distortion. Therefore, distortion only changes the imaging position of the off-axis object point on the ideal plane, which causes the shape of the image to be distorted, but does not affect the sharpness of the image.

[0128] Figure 1A Figure 1 is a structural schematic diagram of an embodiment of an electronic device 1000 provided by the present application.

[0129] As shown in Figure 1A , in some embodiments, the electronic device 1000 can be a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a camera, a personal computer, a notebook computer, a vehicle-mounted device, a wearable device, augmented reality (AR) glasses, an AR helmet, virtual reality (VR) glasses or a VR helmet, or other devices with photographing and video recording functions. Figure 1A The electronic device 1000 of the embodiment shown is exemplified by a mobile phone.

[0130] Figure 1B Figure 2 is a partial cross-sectional schematic diagram of an embodiment of the electronic device 1000 at the A-A line. Figure 1A

[0131] As shown in Figure 1B , in combination with Figure 1A ​As shown, the electronic device 1000 includes a screen 100, a housing 200, a camera module 300, an image processor 400, and an analog-to-digital converter 500. In other embodiments, the electronic device 1000 may include more or fewer structures. For example, when the electronic device 1000 includes more structures, it may also include a circuit board (not shown in the figures). When the electronic device 1000 includes fewer structures, it may not include the screen 100. It is understood that... Figure 1A and Figure 1B The electronic device 1000 is shown only schematically, and the actual shape, size, location, and construction of these components are not subject to change. Figure 1A and Figure 1B limited.

[0132] For example, the screen 100 can be fixed to the housing 200. The screen 100 can be used to display images to meet the user's needs. The display layer can be a liquid crystal display or an organic light-emitting diode display, etc. The screen 100 and the housing 200 can together enclose the interior of the electronic device 1000. The interior of the electronic device 1000 can be used to house components of the electronic device 1000, such as batteries, receivers, or microphones. The screen 100 can be a flat screen or a curved screen.

[0133] It is understood that, for ease of description, the electronic device 1000 is defined in the following text as having a first direction, a second direction, and a third direction. The first direction can be the thickness direction of the electronic device 1000, the second direction can be the length direction of the electronic device 1000, the second direction is perpendicular to the first direction, and the third direction can intersect with the first and second directions. In other embodiments, the coordinate system of the electronic device 1000 can be flexibly set according to specific actual needs.

[0134] For example, the camera module 300 can be installed inside the housing 200, and the light-incident side of the camera module 300 can be set to face away from the screen 100 to serve as a rear camera of the electronic device 1000.

[0135] For example, the housing 200 may have a light-transmitting portion 201, and the shape of the light-transmitting portion 201 is not limited to the attached Figure 1A The shape shown can be circular, elliptical, or irregular. The light-transmitting part 201 connects the interior of the electronic device 1000 to its exterior. Light from outside the electronic device 1000 can enter its interior through the light-transmitting part 201, and it is dustproof and waterproof. The camera module 300 can collect light from outside the electronic device 1000 through the light-transmitting part 201 to capture images or videos.

[0136] In other embodiments, the light-in side of the camera module 300 can be directed to the side where the screen 100 is located, as a front-facing camera of the electronic device 1000. Both the front-facing camera and the rear-facing camera can be used for self-shooting, and can also be used for the photographer to shoot other objects.

[0137] It can be understood that, Figure 1A The installation position of the camera module 300 of the electronic device 1000 of the illustrated embodiment is only schematic, and the application does not strictly limit the installation position of the camera module 300. In some other embodiments, the camera module 300 can also be installed at other positions of the electronic device 1000, for example, the camera module 300 can be installed at the upper middle or upper right corner of the back of the electronic device 1000. In some other embodiments, the electronic device 1000 can include a terminal body and an auxiliary component that can rotate, move or detach relative to the terminal body, and the camera module 300 can also be provided on the auxiliary component.

[0138] Exemplarily, the image processor 400 can be in communication connection with the camera module 300, and the image processor 400 can be used to obtain image data from the camera module 300 and process the image data. The communication connection between the camera module 300 and the image processor 400 can include data transmission through electrical connection such as wiring, or can be achieved through coupling or other means. It can be understood that the camera module 300 and the image processor 400 can also be in communication connection through other means capable of achieving data transmission.

[0139] The image processor 400 can include multiple processing modules, which can be used to convert the original image signal captured by the camera module 300 to form image information, and transmit the processed information to the screen 100 for image or video display through the screen 100. The image processor 400 can be an image processing chip or a digital signal processing chip, which is used to adjust the color of the image, perform noise reduction processing on the image, and further improve the image quality.

[0140] In the embodiments of the present application, the working principle of the camera module 300 in the electronic device 1000 can be that the light reflected by the photographed object enters the inside of the camera module 300, generates an optical image and projects onto the surface of the image sensor of the camera module 300, the image sensor converts the optical image into an electrical signal, i.e., an analog image signal, and transmits the converted analog image signal to the analog-to-digital converter 500, so as to be converted into a digital image signal by the analog-to-digital converter 500 and then transmitted to the image processor 400. The image processor 400 can be operated to convert the original image signal captured by the camera module 300 to form image information, and transmit the processed information to the display module of the screen 100 for image or video display through the screen 100. In other embodiments, the electronic device 1000 can further include a memory (not shown in the drawings), and the image processor 400 can transmit the image after processing the image digital signal to the memory, so as to be able to find the image from the memory at any time when the image needs to be viewed in the future and display the image on the screen 100.

[0141] Figure 1A The structure of the electronic device 1000 is only schematically represented. Wherein Figure 1A The size, number and position of the camera module 300, the image processor 400 and the analog-to-digital converter 500 shown are only schematically represented, which can be adjusted as needed, and the present application does not limit this.

[0142] It can be understood that the number of the camera module 300 can be one or at least two. When the number of the camera module 300 is one, the camera module 300 can be used as a front camera or a rear camera. When the number of the camera module 300 is at least two, the at least two camera modules 300 can be long-focus camera modules 300, wide-angle camera modules 300 or other camera modules capable of meeting different shooting requirements, and the present application does not limit this.

[0143] As Figure 1B shown, the camera module 300 can include an optical lens 10, an image sensor 20 and a filter 30, for example. The light reflected by the photographed object passes through the optical lens 10 by refraction, passes through the filter 30 and is incident on the image sensor 20 to form an image. It can be understood that Figure 1B and the related drawings below only schematically show some components included in the camera module 300, and the actual shape, actual size, actual position and actual structure of these components are not limited by Figure 1Band the following respective drawings. It can be understood that the camera module 300 can also include fewer or more structures. For example, the camera module 300 can include fewer structures, and illustratively, the camera module 300 can not include the optical filter 30. The camera module 300 can include more structures, and for example, the camera module 300 can also include a lens holder (none of which are shown in the drawings).

[0144] The image sensor 20 can be located on the image side of the optical lens 10, and the image sensor 20 is a semiconductor chip, which can also be referred to as a photosensitive chip. The surface of the image sensor 20 includes hundreds of thousands to millions of photodiodes, which will generate electric charges when exposed to light. The image sensor 20 uses the photoelectric conversion function of the photoelectric device to convert the light image on its photosensitive surface into an electric signal in a corresponding proportional relationship with the light image. The photosensitive surface of the image sensor 20 faces the optical lens 10. The image sensor 20 can be a charge-coupled device, a complementary metal-oxide semiconductor, a phototransistor, or a thin-film transistor, etc.

[0145] Illustratively, the camera module 300 can also include a driving member (none of which are shown in the drawings), which is used to drive the lens and / or the image sensor 20 to move to achieve automatic focusing and / or optical image stabilization. The driving member can be a motor, and for example, the driving member can be a voice coil motor or a shape memory alloy motor.

[0146] Illustratively, the optical filter 30 can be located between the optical lens 10 and the image sensor 20. The light rays passing through the optical lens 10 are incident on the optical filter 30, and the light rays passing through the optical filter 30 are filtered and imaged on the image sensor 20. Illustratively, the optical filter 30 can be an infrared filter 30. The optical filter 30 can eliminate unnecessary bands of light rays projected onto the image sensor 20, prevent the image sensor 20 from producing false colors or moiré, and improve its effective resolution and color reproduction.

[0147] In some embodiments, the camera module 300 can also cancel the optical filter 30, and instead, at least one optical element of the optical lens 10 can be surface treated or material treated to achieve filtering. The present application does not strictly limit the specific embodiments of the structural member or structure used to achieve filtering.

[0148] The implementation scheme of the optical lens 10 in the camera module 300 shown in Figure 1B is described below.

[0149] Figure 2 is Figure 1B a simplified schematic diagram of part of the structure of the camera module 300 in an embodiment.

[0150] As Figure 2As shown, the optical lens 10 includes a mirror group 1, a lens group 2, and a folding element 3 arranged sequentially from the object side to the image side. Exemplarily, light entering the optical lens 10 can pass through the mirror group 1, the lens group 2, and the folding element 3 sequentially. It can be understood that the first direction can be the optical axis direction of the mirror group 1.

[0151] For example, the mirror assembly 1 includes an incident surface 1a and an exit surface 1b. The exit surface 1b of the mirror assembly 1 faces the lens assembly 2. Light enters the interior of the mirror assembly 1 through the incident surface 1a, undergoes at least two reflections inside the mirror assembly 1, and then exits the mirror assembly 1 through the exit surface 1b and enters the lens assembly 2.

[0152] It is understandable that the mirror group 1 can deflect the light entering the optical lens 10, and the light can be reflected at least twice inside the mirror group 1. On the one hand, the total length of the light path is increased, which is beneficial to realize the telephoto end shooting of the optical lens 10. On the other hand, by increasing the total length of the light path through reflection, the physical length and height of the optical lens 10 can be reduced, which is beneficial to realize the compact setting of the optical lens 10, thereby reducing the height of the optical lens 10 and thus realizing the miniaturization of the optical lens 10.

[0153] like Figure 2 As shown, exemplarily, the mirror assembly 1 includes an object-side surface 1c and an image-side surface 1d facing away from each other. The incident surface 1a of the mirror assembly 1 can be located on the object-side surface 1c, and the exit surface 1b of the mirror assembly 1 can be located on the image-side surface 1d. After light enters the mirror assembly 1, the first reflection of the light within the mirror assembly 1 occurs on the image side, where the second reflection of the light within the mirror assembly 1 occurs.

[0154] It is understandable that the mirror group 1 can deflect the light entering the optical lens 10. The light can be reflected twice inside the mirror group 1. On the one hand, the total length of the light path is increased, which is beneficial for shooting at the telephoto end of the optical lens 10. On the other hand, by increasing the total length of the light path through reflection, the physical length and height of the optical lens 10 can be reduced, which is beneficial for achieving a compact setting of the optical lens 10, thereby reducing the height of the optical lens 10 and achieving a miniaturized setting of the optical lens 10.

[0155] In other embodiments, when the reflector group 1 adopts other structures, light can undergo first and second reflections in other areas within the reflector group 1. This application does not specifically limit the details.

[0156] The following will describe in more detail some specific, but not limiting, examples of embodiments of this application with reference to the accompanying drawings.

[0157] The first embodiment is as shown in FIG. 1. The optical lens 10 includes a mirror group 1 and a lens group 2. The mirror group 1 includes a first reflective lens 11. The lens group 2 includes a second reflective lens 21 and a third reflective lens 31. Figure 2 The first reflective lens 11 includes a first sub-zone 111 and a second sub-zone 112. The first sub-zone 111 can be arranged around the second sub-zone 112. The first sub-zone 111 can be curved towards the image side. In other words, the middle region of the first sub-zone 111 can be convex towards the direction away from the lens group 2. The second sub-zone 112 can be curved towards the object side. In other words, the middle region of the second sub-zone 112 can be convex towards the direction close to the lens group 2.

[0158] The first reflective lens 11 includes a third sub-zone 113 and a fourth sub-zone 114. The third sub-zone 113 can be arranged around the fourth sub-zone 114. The third sub-zone 113 can be curved towards the object side. In other words, the middle region of the third sub-zone 113 can be convex towards the direction close to the lens group 2. The fourth sub-zone 114 can be curved towards the image side. In other words, the middle region of the third sub-zone 113 can be convex towards the direction away from the lens group 2.

[0159] The first reflective lens 11 includes a third sub-zone 113 and a fourth sub-zone 114. The third sub-zone 113 can be arranged around the fourth sub-zone 114. The third sub-zone 113 can be curved towards the object side. In other words, the middle region of the third sub-zone 113 can be convex towards the direction close to the lens group 2. The fourth sub-zone 114 can be curved towards the image side. In other words, the middle region of the third sub-zone 113 can be convex towards the direction away from the lens group 2.

[0160] The first reflective lens 11 includes a third sub-zone 113 and a fourth sub-zone 114. The third sub-zone 113 can be arranged around the fourth sub-zone 114. The third sub-zone 113 can be curved towards the object side. In other words, the middle region of the third sub-zone 113 can be convex towards the direction close to the lens group 2. The fourth sub-zone 114 can be curved towards the image side. In other words, the middle region of the third sub-zone 113 can be convex towards the direction away from the lens group 2.

[0161] The first reflective lens 11 includes a third sub-zone 113 and a fourth sub-zone 114. The third sub-zone 113 can be arranged around the fourth sub-zone 114. The third sub-zone 113 can be curved towards the object side. In other words, the middle region of the third sub-zone 113 can be convex towards the direction close to the lens group 2. The fourth sub-zone 114 can be curved towards the image side. In other words, the middle region of the third sub-zone 113 can be convex towards the direction away from the lens group 2.

[0162] The first reflective lens 11 includes a third sub-zone 113 and a fourth sub-zone 114. The third sub-zone 113 can be arranged around the fourth sub-zone 114. The third sub-zone 113 can be curved towards the object side. In other words, the middle region of the third sub-zone 113 can be convex towards the direction close to the lens group 2. The fourth sub-zone 114 can be curved towards the image side. In other words, the middle region of the third sub-zone 113 can be convex towards the direction away from the lens group 2.

[0163] The first reflective lens 11 includes a third sub-zone 113 and a fourth sub-zone 114. The third sub-zone 113 can be arranged around the fourth sub-zone 114. The third sub-zone 113 can be curved towards the object side. In other words, the middle region of the third sub-zone 113 can be convex towards the direction close to the lens group 2. The fourth sub-zone 114 can be curved towards the image side. In other words, the middle region of the third sub-zone 113 can be convex towards the direction away from the lens group 2.

[0164] The first reflective lens 11 includes a third sub-zone 113 and a fourth sub-zone 114. The third sub-zone 113 can be arranged around the fourth sub-zone 114. The third sub-zone 113 can be curved towards the object side. In other words, the middle region of the third sub-zone 113 can be convex towards the direction close to the lens group 2. The fourth sub-zone 114 can be curved towards the image side. In other words, the middle region of the third sub-zone 113 can be convex towards the direction away from the lens group 2.

[0165] For example, after light enters the first reflecting lens 11, it undergoes a first reflection on the third sub-region 113 of the image side 11b of the first reflecting lens 11, and a second reflection on the second sub-region 112 of the object side 11a of the first reflecting lens 11.

[0166] It is understandable that the first reflecting lens 11 can deflect the light entering the optical lens 10, and the light can undergo two reflections inside the first reflecting lens 11. On the one hand, the total length of the light path is increased, which is beneficial for achieving telephoto shooting with the optical lens 10; on the other hand, increasing the total length of the light path through reflection can reduce the physical length and height of the optical lens 10, which is beneficial for achieving a compact setting of the optical lens 10, thereby reducing the height of the optical lens 10 and further achieving a miniaturized setting of the optical lens 10.

[0167] It is understood that the second sub-region 112 of the object-side surface 11a of the first reflecting lens 11 can be the reflecting surface closest to the object side of the mirror assembly 1. The second sub-region 112 of the object-side surface 11a of the first reflecting lens 11 can be the second reflecting surface 1f of the mirror assembly 1. The second reflecting surface 1f of the mirror assembly 1 can be bent towards the object side. The second reflecting surface 1f of the mirror assembly 1 bent towards the object side can modulate the imaging field of view, correct off-axis aberrations, and thus improve the imaging quality of the optical lens 10.

[0168] In other embodiments, when the mirror assembly 1 adopts other structures, other areas of the mirror assembly 1 may also be the second reflecting surface 1f of the mirror assembly 1.

[0169] It is understandable that the third sub-region 113 of the image-side surface 11b of the first reflecting lens 11 can be the reflecting surface closest to the image side of the mirror assembly 1. The third sub-region 113 of the image-side surface 11b of the first reflecting lens 11 can be the first reflecting surface 1e of the mirror assembly 1. The first reflecting surface 1e of the mirror assembly 1 can be bent towards the object side. The first reflecting surface 1e of the mirror assembly 1 bent towards the object side can compress light rays and correct on-axis aberrations, thereby improving the imaging quality of the optical lens 10.

[0170] In other embodiments, when the mirror assembly 1 adopts other structures, other areas of the mirror assembly 1 may also be the first reflecting surface 1e of the mirror assembly 1.

[0171] In other embodiments, the mirror assembly 1 may also adopt other structures.

[0172] like Figure 2 As shown, by way of example, the lens group 2 may include at least one lens, such as two or three lenses, and multiple lenses may be arranged along the optical axis of the lens group 2.

[0173] likeFigure 2 As shown, the cross section of the folding element 3 can be approximately trapezoidal, for example. In other embodiments, the cross section of the folding element 3 can also be parallelogram, triangle or other shapes.

[0174] As shown, the folding element 3 includes a top surface 31 and a bottom surface 32 arranged oppositely, and the top surface 31 of the folding element 3 can be arranged to face the lens group 2.

[0175] As shown, the folding element 3 includes an incident surface 33 and an exit surface 34, and the incident surface 33 of the folding element 3 and the exit surface 34 of the folding element 3 can be located on the top surface 31 of the folding element 3. After passing through the lens group 2, the light rays enter the inside of the folding element 3 through the incident surface 33 of the folding element 3, and are emitted from the exit surface 34 of the folding element 3 after at least one reflection in the folding element 3.

[0176] It can be understood that the light rays converged by the lens group 2 are reflected at least once in the folding element 3, and the folding element 3 can increase the total length of the optical path. Through the cooperation between the folding element 3 and the mirror group 1, the total length of the optical path is further increased, thereby further facilitating the shooting at the telephoto end of the optical lens 10. In addition, since the folding element 3 increases the total length of the optical path by reflection, the overall physical length and height of the optical lens 10 can be further kept short, and the system optical total length of the camera module 300 is not easily significantly increased, which is conducive to further reducing the height of the optical lens 10, thereby realizing the miniaturized arrangement of the optical lens 10.

[0177] In other embodiments, when the folding element 3 adopts other structures, the incident surface 33 of the folding element 3 and the exit surface 34 of the folding element 3 can also be located on other structures of the folding element 3.

[0178] As shown, the folding element 3 further includes a first reflecting surface 35 and a second reflecting surface 36, and the first reflecting surface 35 of the folding element 3 and the second reflecting surface 36 of the folding element 3 can connect the top surface 31 of the folding element 3 and the bottom surface 32 of the folding element 3.

[0179] As shown, after the light rays passing through the mirror group 1 and the lens group 2 enter the folding element 3, the light rays are reflected on the first reflecting surface 35 of the folding element 3, the top surface 31 of the folding element 3 and the second reflecting surface 36 of the folding element 3. In one embodiment, the first reflection occurs on the first reflecting surface 35 of the folding element 3, the second reflection occurs on the top surface 31 of the folding element 3, and the third reflection occurs on the second reflecting surface 36 of the folding element 3, and then the light rays are emitted from the exit surface 34 of the folding element 3, then pass through the optical filter 30 to reach the image sensor 20 and realize imaging.

[0180] It can be understood that the light can be reflected multiple times on the top surface 31 of the folding element 3, the first reflection surface 35 and the second reflection surface 36, and the folding element 3 can increase the total length of the optical path. The folding element 3 can cooperate with the mirror group 1, and the total length of the optical path is further increased, thereby further facilitating the long focal end shooting of the optical lens 10. In addition, since the folding element 3 increases the total length of the optical path by reflection, the physical length and height of the optical lens 10 as a whole can be kept short, and the system optical total length of the camera module 300 is not easily significantly increased, which is beneficial to reduce the height of the optical lens 10, thereby realizing the miniaturization of the optical lens 10.

[0181] The structure of the related components of the camera module 300 is specifically introduced above. The related optical parameters of the optical lens 10 of the camera module 300 will be specifically introduced below in combination with the drawings, and the meanings of the related optical parameters are indicated in the related drawings.

[0182] Exemplarily, the optical lens 10 can satisfy: 0.2 < RBL / EFL < 1.1, wherein RBL is the back focal length of the mirror group 1, that is, the distance traveled by the light in the process of reaching the image sensor 20 after being emitted from the mirror group 1, and EFL is the focal length of the optical lens 10. For example, RBL / EFL can be equal to 0.21, 0.23, 0.26, 0.28, 0.35, 0.4, 0.45, 0.5, 0.66, 0.72, 0.8, 0.95 or 1.01, etc. It can be understood that by limiting the ratio of the back focal length RBL of the mirror group 1 to the focal length EFL of the optical lens 10 to be within the range of 0.2 to 1.1, it is ensured that the mirror group 1 has a space in which the light can be reflected at least twice, and the optical lens 10 has sufficient space to arrange the lens group 2, so that the optical lens 10 has a relatively high magnification, and the super-telephoto shooting performance of the optical lens 10 is good. In particular, when the ratio of the back focal length RBL of the mirror group 1 to the focal length EFL of the optical lens 10 is close to 0.2, the super-telephoto shooting performance of the optical lens 10 is good.

[0183] In some embodiments, the optical lens 10 can also satisfy: 0.35 < RBL / EFL < 1.1, for example, RBL / EFL can be equal to 0.36, 0.41, 0.53, 0.6, 0.7, 0.88, 0.99 or 1.09, etc. It can be understood that by limiting the ratio of the back focal length RBL of the mirror group 1 to the focal length EFL of the optical lens 10 to be within the range of 0.35 to 1.1, it is ensured that the light can be reflected at least twice in the mirror group 1, and the optical lens 10 has sufficient space to arrange the lens group 2, so that the optical lens 10 has a relatively high magnification, and the super-telephoto shooting performance of the optical lens 10 is good.

[0184] In other embodiments, RBL / EFL can also satisfy other ranges. The application is not limited specifically.

[0185] Exemplarily, the optical lens 10 can satisfy: FOV≤50°, wherein FOV is the full field of view angle of the optical lens 10, for example, FOV can be equal to 5°, 10.6°, 15°, 16.6°, 23°, 28°, 32.7°, 38°, 40°, 45° or 50°, etc. It can be understood that by limiting the full field of view angle FOV of the optical lens 10 in the range of less than or equal to 50°, the distortion and distortion of the image edge are reduced or avoided, and the full field of view angle FOV of the optical lens 10 is smaller, the field of view of the optical lens 10 is smaller, and the optical magnification is larger, which can better satisfy the ultra-long focal design of the optical lens 10.

[0186] In other embodiments, FOV can also satisfy other ranges. The application is not limited specifically.

[0187] Exemplarily, the optical lens 10 can satisfy: 0.2<LEL / LH<0.9, wherein LEL is the distance between the object side 1c of the mirror group 1 and the image side of the last lens arranged along the first direction of the lens group 2 when at least part of the lens group 2 is arranged along the first direction, or LEL can be the distance between the object side 1c of the mirror group 1 and the image side 1d of the mirror group 1 when all of the lens group 2 is arranged along the second direction, and LH is the height of the camera module 300, for example, LEL / LH can be equal to 0.21, 0.25, 0.3, 0.47, 0.51, 0.66, 0.72, 0.8 or 0.89, etc. It can be understood that by limiting the ratio of the distance LEL between the object side 1c of the mirror group 1 and the image side of the last lens arranged along the first direction of the lens group 2 or the distance between the object side 1c of the mirror group 1 and the image side 1d of the mirror group 1 to the height LEL of the camera module 300 in the range of 0.2 to 0.9, the height of the camera module 300 is reduced, which is beneficial to reduce the shoulder height of the camera module 300, thereby facilitating the miniaturization of the camera module 300.

[0188] In other embodiments, LEL / LH can also satisfy other ranges. The application is not limited specifically.

[0189] Exemplarily, the optical lens 10 can satisfy: LD / LRD>1.5, where LD is the maximum diameter of the light passing through the area of the object side 1c of the mirror group 1, and LRD is the maximum diameter of the light exiting the area of the image side 1d of the mirror group 1, for example, LD / LRD can be equal to 1.51, 1.6, 1.8, 2.3, 2.5, 3, 5 or 10, etc. It can be understood that by limiting the ratio of the maximum diameter LD of the light passing through the area of the object side 1c of the mirror group 1 to the maximum diameter LRD of the light exiting the area of the image side 1d of the mirror group 1 in the range greater than 1.5, the light reflected by the mirror group 1 is contracted, the height of the optical lens 10 is reduced, which is beneficial to reduce the shoulder height of the optical lens 10, thereby facilitating the miniaturization of the optical lens 10.

[0190] In other embodiments, LD / LRD can also satisfy other ranges. Specifically, the present application is not limited.

[0191] Exemplarily, the lens group 2 can include a first lens 21, and the object side of the first lens 21 is arranged to face the image side of the mirror group 1. The optical lens 10 can satisfy: LD / RD>1.1, where RD is the maximum diameter of the light passing through the area of the first lens 21, for example, LD / RD can be equal to 1.2, 1.5, 2, 2.5, 2.9, 3, 4, 5 or 5.5, etc. It can be understood that by limiting the ratio of the maximum diameter LD of the light passing through the area of the object side 1c of the mirror group 1 to the maximum diameter RD of the light passing through the area of the first lens 21 in the range greater than 1.1, the light reflected by the mirror group 1 is contracted, the light is intercepted, and the off-axis aberration is corrected.

[0192] In other embodiments, LD / RD can also satisfy other ranges. Specifically, the present application is not limited.

[0193] Exemplarily, the optical lens 10 can satisfy: CTR / LD<0.7, where CTR is the thickness of the mirror group 1 (i.e. the height of the mirror group 1 in the first direction), for example, CTR / LD can be equal to 0.1, 0.22, 0.3, 0.37, 0.4, 0.55, 0.66 or 0.69, etc. It can be understood that by limiting the ratio of the thickness CTR of the mirror group 1 to the maximum diameter LD of the light passing through the area of the object side 1c of the mirror group 1 in the range less than 0.7, the light reflected by the mirror group 1 is contracted, the height of the optical lens 10 is reduced, which is beneficial to reduce the shoulder height of the optical lens 10, thereby facilitating the miniaturization of the optical lens 10.

[0194] In other embodiments, CTR / LD can also satisfy other ranges. Specifically, the present application is not limited.

[0195] Exemplarily, the optical lens 10 can satisfy: 0.6 < DOR / I H < 5, wherein the DOR is the maximum reflected light diameter of the region closest to the object side where reflection occurs on the mirror group 1, and the I H is the image height of the optical lens 10, for example, the DOR / I H can be equal to 0.66, 1, 1.6, 2, 2.5, 3, 3.61, 4 or 4.9, etc. It can be understood that by limiting the ratio of the maximum reflected light diameter DOR of the region closest to the object side where reflection occurs on the mirror group 1 to the image height I H of the optical lens 10 within the range of 0.6 to 5, the obstruction of the on-axis light is reduced, the loss of light is reduced, and thus the imaging quality of the optical lens 10 is improved.

[0196] In other embodiments, the DOR / I H can also satisfy other ranges. Specifically, the present application is not limited.

[0197] Exemplarily, the camera module 300 can satisfy: LEL / TTL < 0.6, wherein the TTL is the total system optical length of the camera module 300, that is, the total optical path length of the central light of the central field of view in the camera module 300, for example, the LEL / TTL can be equal to 0.1, 0.23, 0.28, 0.35, 0.4, 0.48, 0.5 or 0.58, etc. It can be understood that by limiting the ratio of the distance between the object side 1c of the mirror group 1 and the image side of the last lens arranged along the first direction of at least part of the lens group 2 or the distance between the object side 1c of the mirror group 1 and the image side 1d of the mirror group 1 LEL to the total system optical length TTL of the camera module 300 within the range of less than 0.6, the height of the optical lens 10 and the camera module 300 is reduced, which is beneficial to reduce the shoulder height of the optical lens 10 and the camera module 300, thereby facilitating the miniaturization of the optical lens 10 and the camera module 300.

[0198] In other embodiments, the LEL / TTL can also satisfy other ranges. Specifically, the present application is not limited.

[0199] Exemplarily, the optical lens 10 can satisfy: -1 < HP-1.25 x I H x tan(PA) < 5, wherein the HP is the height of the folding element 3 in the first direction, and the PA is the angle of the smallest acute angle inside the folding element 3, for example, the HP-1.25 x I H x tan(PA) can be equal to -0.9, -0.5, 0, 0.38, 1, 1.68, 2, 2.6, 3.3, 3.8, 4 or 4.9, etc. It can be understood that by limiting the HP-1.25 x I H x tan(PA) within the range of -1 to 5, the folded light path is facilitated, thereby reducing the volume of the optical lens 10, which is beneficial to the miniaturization of the optical lens 10.

[0200] In other embodiments, the HP-1.25x IHxtan(PA) can also satisfy other ranges. Specifically, the present application is not limited.

[0201] In other embodiments, the minimum acute angle inside the folding element 3 is not limited to the sharp corner form as shown, for example, the minimum acute angle inside the folding element 3 can be rounded or ground flat according to actual needs. Specifically, the present application is not limited. Figure 2

[0202] Exemplarily, the folding element 3 can satisfy: Vd>15, where Vd is the Abbe number of the folding element 3, for example, Vd can be equal to 16, 18, 23, 28, 30, 35 or 40, etc. It can be understood that the Abbe number of the folding element 3 is larger, the folding element 3 can have higher light receiving efficiency and transmittance, can increase the amount of light in the optical path, thereby enhancing the brightness and clarity of imaging, thereby enhancing the resolution of the optical lens 10, reducing optical distortion and color distortion, when the optical lens 10 is applied to the camera module 300 and the electronic device 1000, the imaging quality of the camera module 300 and the electronic device 1000 is better.

[0203] In other embodiments, the Abbe number Vd of the folding element 3 can also satisfy other ranges. Specifically, the present application is not limited.

[0204] As shown in Figure 2 The camera module 300 includes, in order from the object side to the image side, a mirror group 1, a lens group 2, a folding element 3, a filter 30 and an image sensor 20. Exemplarily, the mirror group 1 can include a first reflecting lens 11, the lens group 2 can include a first lens 21, a second lens 22 and a third lens 23. In other embodiments, the mirror group 1, the lens group 2 and the folding element 3 can all adopt other structures.

[0205] Exemplarily, by moving the image sensor 20, or the optical lens 10, or the first lens 21, the second lens 22 and the third lens 23 of the lens group 2, or the folding element 3, the auto-focusing of the camera module 300 is realized, and the imaging quality of the camera module 300 is improved.

[0206] The design parameters of the camera module 300 of the first embodiment of the present application are as follows Table 1.

[0207] Table 1 Partial design parameters of each element of the camera module 300 of the first embodiment

[0208]

[0209] ​

[0210] It can be understood that in Table 1, OBJ can represent the object side of the optical lens 10; STO can represent a stop (not shown in the drawings); S1 can represent a first sub-region 111 of the object side 11a of the first reflective lens 11; S2 can represent a third sub-region 113 of the image side 11b of the first reflective lens 11; S3 can represent a second sub-region 112 of the image side 11b of the first reflective lens 11; S4 can represent a fourth sub-region 114 of the image side 11b of the first reflective lens 11; S5 and S6 can respectively represent the object side and the image side of the first lens 21; S7 and S8 can respectively represent the object side and the image side of the second lens 22; S9 and S10 can respectively represent the object side and the image side of the third lens 23; S11 can represent the entrance face 33 of the folding element 3; S12 can represent the first reflective face 35 of the folding element 3; S13 can represent the top face 31 of the folding element 3; S14 can represent the second reflective face 36 of the folding element 3; S15 can represent the exit face 34 of the folding element 3; S16 and S17 can respectively represent the object side and the image side of the filter 30; and S18 can represent the imaging face of the camera module.

[0211] In addition, the thickness of OBJ refers to the distance between the object and the object side of the optical lens 10. The thickness of S1 refers to the distance between the first sub-region 111 of the object side 11a of the first reflective lens 11 and the third sub-region 113 of the image side 11b of the first reflective lens 11. The thickness of S2 refers to the distance between the third sub-region 113 of the image side 11b of the first reflective lens 11 and the second sub-region 112 of the image side 11b of the first reflective lens 11. The thickness of S3 refers to the distance between the second sub-region 112 of the image side 11b of the first reflective lens 11 and the fourth sub-region 114 of the image side 11b of the first reflective lens 11. The thickness of S4 refers to the distance between the fourth sub-region 114 of the image side 11b of the first reflective lens 11 and the object side of the first lens 21. The thickness of S5 refers to the distance between the object side of the first lens 21 and the image side of the first lens 21. The thickness of S6 refers to the distance between the image side of the first lens 21 and the object side of the second lens 22. The thickness of S7 refers to the distance between the object side of the second lens 22 and the image side of the second lens 22. The thickness of S8 refers to the distance between the image side of the second lens 22 and the object side of the third lens 23. The thickness of S9 refers to the distance between the object side of the third lens 23 and the image side of the third lens 23. The thickness of S10 refers to the distance between the image side of the third lens 23 and the incident surface 33 of the folding element 3. The thickness of S11 refers to the distance between the incident surface 33 of the folding element 3 and the first reflective surface 35 of the folding element 3. The thickness of S12 refers to the distance between the first reflective surface 35 of the folding element 3 and the top surface 31 of the folding element 3. The thickness of S13 refers to the distance between the top surface 31 of the folding element 3 and the second reflective surface 36 of the folding element 3. The thickness of S14 refers to the distance between the second reflective surface 36 of the folding element 3 and the emergent surface 34 of the folding element 3. The thickness of S15 refers to the distance between the emergent surface 34 of the folding element 3 and the object side of the optical filter 30. The thickness of S16 refers to the distance between the object side of the optical filter 30 and the image side of the optical filter 30. The thickness of S17 refers to the distance between the image side of the optical filter 30 and the object side of the image sensor 20. S18 refers to the distance between the object side of the image sensor 20 and the imaging surface.

[0212] In Table 1, the thickness of S1 greater than 0 means that the light is transmitted on the first sub-region 111 of the object side 11a of the first reflective lens 11, and the light path does not turn. The thickness of S2 less than 0 means that the light is reflected on the third sub-region 113 of the image side 11b of the first reflective lens 11, and the light path turns. It can be understood that the positive and negative meanings of the thickness in Table 1 and the following tables are the same, and will not be repeated hereinafter.

[0213] The optical lens 10 satisfies: FOV=10.9°. It can be understood that by limiting the full field of view FOV of the optical lens 10 to be equal to 10.9°, the distortion and the aberration of the image edge are reduced or avoided, and the full field of view FOV of the optical lens 10 is smaller, the field of view of the optical lens 10 is smaller, and the optical magnification is larger, so that the super-telephoto design of the optical lens 10 can be better met.

[0214] The folding element 3 satisfies: Vd=42.7. It can be understood that the Abbe number of the folding element 3 is larger, which can reduce the dispersion and chromatic aberration problems in the optical lens 10, better correct the dispersion and chromatic aberration, and the resolution of the optical lens 10 is higher, and the imaging quality is clearer.

[0215] In addition, the aspheric coefficients of each element of the camera module 300 of the first embodiment of the present application are as shown in Table 2 below.

[0216] Table 2 Aspheric coefficients of each element of the camera module 300 of the first embodiment

[0217] Surface 1 2 3 4 [A4] 4.2364680E-06 4.4964753E-05 5.6212959E-04 -2.5566236E-03 [A6] -1.1167354E-08 3.0751199E-08 -3.6377557E-06 -1.9773993E-05 [A8] 9.1987148E-11 5.6386975E-10 2.5348247E-07 -8.5977369E-05 A 10 ]] 1.6670517E-11 -1.7142859E-12 -1.7809718E-08 4.6602502E-05 A 12 ]]> -1.8168987E-13 -2.0279582E-14 3.4752513E-10 -1.4874027E-05 A 14 ]]> / / / 2.4757431E-06 A 16 ]]> / / / -1.6890417E-07 Surface 5 6 7 8 [A4] 7.9200053E-04 -3.5845012E-04 1.1517475E-02 1.0181209E-02 [A6] 1.1793872E-03 4.4658155E-04 -1.9381766E-03 6.0390856E-04 [A8] 1.0022967E-05 2.8823383E-05 4.2038159E-04 -1.5671044E-04 A 10 ]]> -2.9775517E-05 -5.1014313E-07 -6.3298893E-05 2.1984255E-05 A 12 ]]> 7.3430036E-06 8.3070480E-07 6.0350401E-06 -1.7422065E-06 A 14 ]]> -6.3473464E-07 -1.0800741E-07 -3.2771888E-07 -1.6289043E-08 A 16 ]] / / / / Surface 9 10 [A4] -9.7681022E-03 -1.2177285E-02 [A6] 1.9652930E-03 1.7058606E-03 [A8] -3.4514643E-04 -2.3120451E-04 A 10 ]]> 4.6160100E-05 2.2208812E-05 A 12 ]]> -3.3487541E-06 -9.7032117E-07 A 14 ]]> 9.4167079E-08 1.0972009E-08 A 16 ]]> / /

[0218] A4, A6, A8, A 10 , A 12 , A 14 , and A 16 . The polynomial coefficients (such as A1, A2, A3, etc.) that do not exist in the table are all 0. It can be understood that each parameter in the table is expressed in scientific notation. For example, 4.2364680E-06 means 4.2364680x10 -6 ; -1.1167354E-08 means -1.1167354x10 -8 . It can be understood that the counting method of each parameter in the table is the same, and will not be repeated hereinafter.

[0219] It can be understood that among the 10 aspheric surfaces of the camera module 300 shown in Table 1 and Table 2, all the even and odd aspheric surface types z can be defined by, but not limited to, the following aspheric formula:

[0220]

[0221] Where z(x, y) is the optical surface sag; k is the conic coefficient; c is the curvature radius; r is the radius height in the optical axis direction; r 2 =x 2 +y 2 ; a i is the polynomial coefficient; r iis a standard radial coordinate. The design parameters of the first reflective lens 11, the first lens 21, the second lens 22 and the third lens 23 of the optical lens 10 are substituted into the above-mentioned aspherical surface formula, and the surface shapes of the object side and the image side of the first reflective lens 11, the first lens 21, the second lens 22 and the third lens 23 of the camera module 300 of the first embodiment of the present application can be obtained.

[0222] According to the data in Table 1 and Table 2, the partial parameters of the camera module 300 of the first embodiment of the present application can be obtained as shown in Table 3.

[0223] Table 3 Partial parameters of the camera module 300 of the first embodiment

[0224]

[0225]

[0226] Wherein, the back focal length RBL (i.e. the sum of the absolute value of the thickness of S4 to the absolute value of the thickness of S17 in Table 1) of the mirror group 1 and the focal length EFL of the optical lens 10 satisfy: RBL / EFL = 0.51. It can be understood that by limiting the ratio of the back focal length RBL of the mirror group 1 to the focal length EFL of the optical lens 10 to be equal to 0.51, it is ensured that the mirror group 1 has space inside which light can be reflected at least twice, and the optical lens 10 has sufficient space to arrange the lens group 2, so that the optical lens 10 has a higher magnification, and the super-telephoto shooting performance of the optical lens 10 is better.

[0227] Wherein, the distance LEL between the object side 1c of the mirror group 1 and the image side of the last lens arranged in the first direction of the lens group 2 and the height LH of the camera module 300 satisfy: LEL / LH = 0.68. It can be understood that by limiting the ratio of the distance LEL between the object side 1c of the mirror group 1 and the image side of the last lens arranged in the first direction of the lens group 2 to the height LH of the camera module 300 to be equal to 0.68, the height of the camera module 300 can be reduced, which is beneficial to reduce the shoulder height of the camera module 300, thereby facilitating the miniaturization of the camera module 300.

[0228] Wherein, the maximum light passing diameter LD of the light passing through the area of the object side 1c of the mirror group 1 and the maximum light passing diameter LRD of the light exiting the area of the image side 1d of the mirror group 1 satisfy: LD / LRD=3.81. It can be understood that by limiting the ratio of the maximum light passing diameter LD of the light passing through the area of the object side 1c of the mirror group 1 and the maximum light passing diameter LRD of the light exiting the area of the image side 1d of the mirror group 1 to be equal to 3.81, the light reflected by the mirror group 1 is contracted, the height of the optical lens 10 is reduced, which is beneficial to reduce the shoulder height of the optical lens 10, thereby facilitating the miniaturization of the optical lens 10.

[0229] Wherein, the maximum light passing diameter LD of the light passing through the area of the object side 1c of the mirror group 1 and the maximum light passing diameter RD of the light passing through the first lens 21 satisfy: LD / RD=3.33. It can be understood that by limiting the ratio of the maximum light passing diameter LD of the light passing through the area of the object side 1c of the mirror group 1 and the maximum light passing diameter RD of the light passing through the first lens 21 to be equal to 3.33, the light reflected by the mirror group 1 is contracted, the light is intercepted, and the off-axis aberration is corrected.

[0230] Wherein, the thickness CTR of the mirror group 1 and the maximum light passing diameter LD of the light passing through the area of the object side 1c of the mirror group 1 satisfy: CTR / LD=0.30. It can be understood that by limiting the ratio of the thickness CTR of the mirror group 1 and the maximum light passing diameter LD of the light passing through the area of the object side 1c of the mirror group 1 to be equal to 0.30, the light reflected by the mirror group 1 is contracted, the height of the optical lens 10 is reduced, which is beneficial to reduce the shoulder height of the optical lens 10, thereby facilitating the miniaturization of the optical lens 10.

[0231] Wherein, the maximum reflection light diameter DOR of the area closest to the object side of the mirror group 1 where reflection occurs and the image height IH of the optical lens 10 satisfy: DOR / IH=1.83. It can be understood that by limiting the ratio of the maximum reflection light diameter DOR of the area closest to the object side of the mirror group 1 where reflection occurs and the image height IH of the optical lens 10 to be equal to 1.83, the obstruction of on-axis light is reduced, the loss of light is reduced, and the imaging quality of the optical lens 10 is improved.

[0232] As Figure 2As shown, the region closest to the object side where the light rays are reflected on the mirror group 1 can be the second sub-region 112 of the first reflective lens 11, exemplarily. In other embodiments, when the mirror group 1 adopts other structures, the region closest to the object side where the light rays are reflected on the mirror group 1 can be located on other surfaces of the first reflective lens 11, for example, the region closest to the object side where the light rays are reflected on the mirror group 1 can be located on the image side surface 11b of the first reflective lens 11. The specific application is not limited.

[0233] The distance LEL between the object side surface 1c of the mirror group 1 and the image side surface of the last lens arranged in the first direction of the lens group 2 and the total length TTL of the system optics of the camera module 300 satisfy: LEL / TTL = 0.25. It can be understood that by limiting the ratio of the distance LEL between the object side surface 1c of the mirror group 1 and the image side surface of the last lens arranged in the first direction of the lens group 2 and the total length TTL of the system optics of the camera module 300 to 0.25, the height of the optical lens 10 and the camera module 300 is reduced, which is beneficial to reduce the shoulder height of the optical lens 10 and the camera module 300, thereby facilitating the miniaturization of the optical lens 10 and the camera module 300.

[0234] The height HP of the folding element 3, the image height I H of the optical lens 10, and the angle PA of the smallest acute angle inside the folding element 3 satisfy: HP-1.25xI Hxtan(PA) = 0.43. It can be understood that by limiting HP-1.25xI Hxtan(PA) to be equal to 0.43, the folded light path is beneficial, thereby reducing the volume of the optical lens 10, which is beneficial to realize the miniaturization of the optical lens 10.

[0235] Figure 3 is a simulation effect diagram one of the telephoto end of the camera module 300 of the first embodiment. It can be understood that in Figure 4 In the coordinate system of the optical lens 10, the horizontal coordinate is the deviation value (focus, mm) in the optical axis direction, and the vertical coordinate is the normalized coordinate at the pupil. Wherein, a) represents the test wavelength is 470nm (nanometer); b) represents the test wavelength is 510nm; c) represents the test wavelength is 555nm; d) represents the test wavelength is 610nm; e) represents the test wavelength is 650nm, the physical meaning is that the light of the corresponding wavelength emitted at 0 degree field of view passes through the optical lens 10, and the deviation relative to the ideal image point. Figure 4The curve of the camera module 300 can represent the axial chromatic aberration curve of the camera module 300, and the axial chromatic aberration curve represents the convergence point deviation of light rays of different wavelengths after passing through each lens of the optical system. It can be understood that in the coordinate system representing the axial chromatic aberration curve of the camera module 300 appearing again in the subsequent, the horizontal coordinate, the vertical coordinate and the annotation in the figure representing the same meaning will not be described again.

[0236] As shown in Figure 3 , when the camera module 300 is at the long focal end, the normalized coordinates of the camera module 300 are small, the axial chromatic aberration (spherical aberration, chromatic aberration, etc.) of the camera module 300 is well corrected, and the imaging quality of the camera module 300 is high.

[0237] Figure 4 is the simulation effect of the long focal end of the camera module 300 of the first embodiment Figure Two . It can be understood that in the coordinate system of Figure 5 , the horizontal coordinate is the deviation value along the optical axis direction (focus, mm), and the vertical coordinate is the image height I H (IMG HT, mm). Figure 5 The curve of the camera module 300 can represent the astigmatic field curve of the camera module 300. The astigmatic field curve represents the meridional image surface curvature and sagittal image surface curvature, and is used to illustrate the deviation of the convergence point of different field of view light beams from the ideal imaging surface, wherein the solid line is the meridional direction light beam, and the dashed line is the sagittal direction light beam, the horizontal coordinate is the deviation value along the optical axis direction, and the vertical coordinate is the corresponding field of view. When a certain field of view value is too large, the image quality of the field of view is poor or there is high-order aberration. It can be understood that in the coordinate system representing the astigmatic field curve of the camera module 300 appearing again in the subsequent, the horizontal coordinate, the vertical coordinate and the annotation in the figure representing the same meaning will not be described again.

[0238] As shown in Figure 4 , when the camera module 300 is at the long focal end, the two direction field curvatures are small, the camera module 300 has good focal depth, and the imaging quality of the camera module 300 is high.

[0239] Figure 5 is the simulation effect of the long focal end of the camera module 300 of the first embodiment Figure Three . It can be understood that in the coordinate system of Figure 6 , the horizontal coordinate is the optical distortion ratio (%), and the vertical coordinate is the image height I H (IMG HT, mm). Figure 6 The curve of the camera module 300 can represent the distortion curve of the camera module 300. It can be understood that in the coordinate system representing the distortion curve of the camera module 300 appearing again in the subsequent, the horizontal coordinate, the vertical coordinate and the annotation in the figure representing the same meaning will not be described again.

[0240] AsFigure 5 As shown, when the camera module 300 is at the telephoto end, the optical distortion ratio of the camera module 300 at different image heights is less than 2%, which can ensure that there is no obvious distortion in the image, the degree of optical distortion of the image is small, and the imaging quality of the camera module 300 is high.

[0241] Second implementation method: Please refer to Figure 6 , Figure 6 yes Figure 1B The diagram shows a simplified partial structure of the camera module 300 in another embodiment.

[0242] In this embodiment, the camera module 300 includes a mirror group 1, a lens group 2, a folding element 3, a filter 30, and an image sensor 20 arranged sequentially from the object side to the image side.

[0243] like Figure 6 As shown, by way of example, the mirror group 1 may include a first reflecting lens 11 and a second reflecting lens 12. The second reflecting lens 12 may be located on the image side of the first reflecting lens 11, that is, the second reflecting lens 12 may be located between the first reflecting lens 11 and the lens group 2.

[0244] For example, the second reflecting lens 12 includes an object side 12a and an image side 12b disposed opposite to each other, and the exit surface 1b of the reflecting mirror group 1 may be located on the image side 12b of the second reflecting lens 12.

[0245] For example, the object side 12a of the second reflecting lens 12 includes a fifth sub-region 121 and a sixth sub-region 122, wherein the fifth sub-region 121 may be arranged around the sixth sub-region 122.

[0246] Exemplarily, the image-side surface 12b of the second reflecting lens 12 includes a seventh sub-region 123 and an eighth sub-region 124, wherein the seventh sub-region 123 may be disposed around the eighth sub-region 124. The seventh sub-region 123 may be curved toward the object side. In other words, the central region of the seventh sub-region 123 may bulge toward the lens group 2. The eighth sub-region 124 may be curved toward the image side. In other words, the central region of the eighth sub-region 124 may bulge away from the lens group 2.

[0247] In other embodiments, the fifth sub-region 121 and the sixth sub-region 122 of the object side 12a of the second reflecting lens 12 can be configured in other ways. The seventh sub-region 123 and the eighth sub-region 124 of the image side 12b of the second reflecting lens 12 can also be configured in other ways.

[0248] Exemplarily, after the light enters the first reflective lens 11, the light exits the first reflective lens 11 through the transmission area of the third sub-area 113, enters the second reflective lens 12 through the transmission area of the fifth sub-area 121, exits the second reflective lens 12 through the transmission area of the fifth sub-area 121 after the first reflection on the reflection area of the seventh sub-area 123, enters the first reflective lens 11 through the transmission area of the third sub-area 113, and then exits the second reflective lens 12 through the eighth sub-area 124 of the image side surface 12b of the second reflective lens 12 after the second reflection on the reflection area of the second sub-area 112, and enters the lens group 2.

[0249] It can be understood that the first reflective lens 11 and the second reflective lens 12 can fold the light entering the optical lens 10, and the light can be reflected once in the first reflective lens 11 and once in the second reflective lens 12. On the one hand, the total length of the light path is increased, which is beneficial to realize the long focal length shooting of the optical lens 10; on the other hand, the total length of the light path is increased by reflection, which can reduce the physical length and height of the optical lens 10, which is beneficial to realize the compact setting of the optical lens 10, thereby reducing the height of the optical lens 10, and realizing the miniaturization of the optical lens 10.

[0250] It can be understood that the second sub-area 112 of the object side surface 11a of the first reflective lens 11 can be the reflection surface closest to the object side of the reflection mirror group 1. The second sub-area 112 of the object side surface 11a of the first reflective lens 11 can be the second reflection surface 1f of the reflection mirror group 1. In other embodiments, when the reflection mirror group 1 adopts other structures, other areas of the reflection mirror group 1 can also be the second reflection surface 1f of the reflection mirror group 1.

[0251] It can be understood that the seventh sub-area 123 of the image side surface 12b of the second reflective lens 12 can be the reflection surface closest to the image side of the reflection mirror group 1. The seventh sub-area 123 of the image side surface 12b of the second reflective lens 12 can be the first reflection surface 1e of the reflection mirror group 1. In other embodiments, when the reflection mirror group 1 adopts other structures, other areas of the reflection mirror group 1 can also be the first reflection surface 1e of the reflection mirror group 1.

[0252] Exemplarily, the lens group 2 includes two lenses. The optical lens 10 includes a first lens 21 and a second lens 22 arranged in sequence from the object side to the image side.

[0253] Exemplarily, the cross section of the folding element 3 is substantially trapezoidal. The folding element 3 comprises a top surface 31 and a bottom surface 32 arranged oppositely, an incident surface 33, an exit surface 34, a first reflecting surface 35, and a second reflecting surface 36, the incident surface 33 of the folding element 3 and the exit surface 34 of the folding element 3 are both located on the top surface 31 of the folding element 3. After the light passing through the mirror group 1 and the lens group 2 enters the folding element 3, the light is reflected on the first reflecting surface 35 of the folding element 3, the top surface 31 of the folding element 3, and the second reflecting surface 36 of the folding element 3. In an embodiment, the first reflection occurs on the first reflecting surface 35 of the folding element 3, the second reflection occurs on the top surface 31 of the folding element 3, and the third reflection occurs on the second reflecting surface 36 of the folding element 3.

[0254] It can be understood that the light can be reflected multiple times on the top surface 31, the first reflecting surface 35, and the second reflecting surface 36 of the folding element 3, and the folding element 3 can increase the total length of the optical path. The folding element 3 can cooperate with the mirror group 1, and the total length of the optical path is further increased, thereby further facilitating the realization of the long focal end shooting of the optical lens 10. In addition, since the folding element 3 increases the total length of the optical path by reflection, the physical length and height of the optical lens 10 as a whole can be kept short, and the system total length of the camera module 300 is not easily significantly increased, which is beneficial to reduce the height of the optical lens 10, thereby realizing the miniaturization of the optical lens 10.

[0255] Exemplarily, by moving the image sensor 20, or the optical lens 10, or the first lens 21 and the second lens 22 of the lens group 2, or the folding element 3, the auto-focusing of the camera module 300 is realized, and the imaging quality of the camera module 300 is improved.

[0256] The partial design parameters of the camera module 300 of the second embodiment of the present application are shown in Table 4.

[0257] Table 4 Partial design parameters of each element of the camera module 300 of the second embodiment

[0258]

[0259] It can be understood that in Table 4, OBJ can represent the object side of the optical lens 10; STO can represent a stop (not shown in the drawings); S1 can represent the first sub-region 111 of the object side 11a of the first reflective lens 11; S2 can represent the third sub-region 113 of the image side 11b of the first reflective lens 11; S3 can represent the fifth sub-region 121 of the object side 12a of the second reflective lens 12; S4 can represent the seventh sub-region 123 of the image side 12b of the second reflective lens 12; S5 can represent the fifth sub-region 121 of the object side 12a of the second reflective lens 12; S6 can represent the third sub-region 113 of the image side 11b of the first reflective lens 11; S7 can represent the second sub-region 112 of the image side 11b of the first reflective lens 11; S8 can represent the fourth sub-region 114 of the image side 11b of the first reflective lens 11; S9 can represent the sixth sub-region 122 of the object side 12a of the second reflective lens 12; S10 can represent the eighth sub-region 124 of the image side 12b of the second reflective lens 12; S11 and S12 can represent the object side and the image side of the first lens 21, respectively; S13 and S14 can represent the object side and the image side of the second lens 22, respectively; S15 can represent the entrance face 33 of the folding element 3; S16 can represent the first reflective face 35 of the folding element 3; S17 can represent the top face 31 of the folding element 3; S18 can represent the second reflective face 36 of the folding element 3; S19 can represent the exit face 34 of the folding element 3; S20 and S21 can represent the object side and the image side of the optical filter 30, respectively; and S22 can represent the imaging face of the camera module.

[0260] Further, the thickness of OBJ refers to the distance between the photographic subject and the object side surface of the optical lens 10. The thickness of S1 refers to the distance between the first sub-region 111 of the object side surface 11a of the first reflecting lens 11 and the third sub-region 113 of the image side surface 11b of the first reflecting lens 11. The thickness of S2 refers to the distance between the third sub-region 113 of the image side surface 11b of the first reflecting lens 11 and the fifth sub-region 121 of the object side surface 12a of the second reflecting lens 12. The thickness of S3 refers to the distance between the fifth sub-region 121 of the object side surface 12a of the second reflecting lens 12 and the seventh sub-region 123 of the image side surface 12b of the second reflecting lens 12. The thickness of S4 refers to the distance between the seventh sub-region 123 of the image side surface 12b of the second reflecting lens 12 and the fifth sub-region 121 of the object side surface 12a of the second reflecting lens 12. The thickness of S5 refers to the distance between the fifth sub-region 121 of the object side surface 12a of the second reflecting lens 12 and the fourth sub-region 114 of the image side surface 11b of the first reflecting lens 11. The thickness of S6 refers to the distance between the fourth sub-region 114 of the image side surface 11b of the first reflecting lens 11 and the second sub-region 112 of the image side surface 11b of the first reflecting lens 11. The thickness of S7 refers to the distance between the second sub-region 112 of the image side surface 11b of the first reflecting lens 11 and the fourth sub-region 114 of the image side surface 11b of the first reflecting lens 11. The thickness of S8 refers to the distance between the fourth sub-region 114 of the image side surface 11b of the first reflecting lens 11 and the sixth sub-region 122 of the object side surface 12a of the second reflecting lens 12. The thickness of S9 refers to the distance between the sixth sub-region 122 of the object side surface 12a of the second reflecting lens 12 and the eighth sub-region 124 of the image side surface 12b of the second reflecting lens 12. The thickness of S10 refers to the distance between the eighth sub-region 124 of the image side surface 12b of the second reflecting lens 12 and the object side surface of the first lens 21. The thickness of S11 refers to the distance between the object side surface of the first lens 21 and the image side surface of the first lens 21. The thickness of S12 refers to the distance between the image side surface of the first lens 21 and the object side surface of the second lens 22. The thickness of S13 refers to the distance between the object side surface of the second lens 22 and the image side surface of the second lens 22. The thickness of S14 refers to the distance between the image side surface of the second lens 22 and the incident surface 33 of the folding element 3. The thickness of S15 refers to the distance between the incident surface 33 of the folding element 3 and the first reflecting surface 35 of the folding element 3. The thickness of S16 refers to the distance between the first reflecting surface 35 of the folding element 3 and the top surface 31 of the folding element 3. The thickness of S17 refers to the distance between the top surface 31 of the folding element 3 and the second reflecting surface 36 of the folding element 3. The thickness of S18 refers to the distance between the second reflecting surface 36 of the folding element 3 and the emergent surface 34 of the folding element 3. The thickness of S19 refers to the distance between the emergent surface 34 of the folding element 3 and the object side surface of the optical filter 30.The thickness of S20 refers to the distance between the object side of the optical filter 30 and the image side of the optical filter 30. The thickness of S21 refers to the distance between the image side of the optical filter 30 and the object side of the image sensor 20. S22 refers to the distance between the object side of the image sensor 20 and the imaging plane.

[0261] The optical lens 10 satisfies: FOV = 12.8°. It can be understood that by limiting the full field of view FOV of the optical lens 10 to be equal to 12.8°, the distortion and the aberration of the image edge are reduced or avoided, and the full field of view FOV of the optical lens 10 is smaller, the field of view of the optical lens 10 is smaller, and the optical magnification is larger, which can better meet the ultra-long focal design of the optical lens 10.

[0262] The folding element 3 satisfies: Vd = 42.7. It can be understood that the Abbe number of the folding element 3 is larger, which can reduce the dispersion and the chromatic aberration problems in the optical lens 10, better correct the dispersion and the chromatic aberration, and the resolution of the optical lens 10 is higher, and the imaging quality is clearer.

[0263] In addition, the aspheric surface coefficients of each element of the camera module 300 of the second embodiment of the present application are as shown in Table 5 below.

[0264] Table 5 Aspheric surface coefficients of each element of the camera module 300 of the second embodiment

[0265]

[0266]

[0267] It can be understood that among the 14 aspheric surfaces of the camera module 300 shown in Table 4 and Table 5, all the even and odd aspheric surface types z can be defined by, but not limited to, the following aspheric surface formula:

[0268]

[0269] Wherein, z(x, y) is the optical surface sag; k is the conic coefficient; c is the curvature radius; r is the radius height in the optical axis direction; r 2 = x 2 +y 2 ; a i is the polynomial coefficient; r i is the normalized radial coordinate. By substituting the design parameters of the first reflective lens 11, the second reflective lens 12, the first lens 21 and the second lens 22 of the optical lens 10 into the above aspheric surface formula, the surface types of the object side and the image side of the first reflective lens 11, the second reflective lens 12, the first lens 21 and the second lens 22 of the camera module 300 of the second embodiment of the present application can be obtained.

[0270] According to the data in Table 4 and Table 5, the partial parameters of the camera module 300 of the second embodiment of the present application can be obtained as shown in Table 6.

[0271] Table 6 Partial parameters of the camera module 300 of the second embodiment

[0272] RBL EFL LEL LH TTL CTR LD 20.90 45.00 8.00 12.90 38.30 6.16 20.00 LRD HP IH PA RD DOR 6.00 4.50 5.12 32.25 6.14 8.40

[0273] It can be understood that the setting ranges of the related optical parameters in the present embodiment can refer to the setting ranges of the related optical parameters in the first embodiment.

[0274] In the present embodiment, the back focal length RBL of the mirror group 1 (i.e., the sum of the absolute value of the thickness of S10 to the absolute value of the thickness of S21 in Table 4) and the focal length EFL of the optical lens 10 satisfy: RBL / EFL = 0.46. It can be understood that by limiting the ratio of the back focal length RBL of the mirror group 1 to the focal length EFL of the optical lens 10 to be equal to 0.51, it is ensured that the mirror group 1 has a space inside which light can be reflected at least twice, and the optical lens 10 has sufficient space to arrange the lens group 2, so that the optical lens 10 has a higher magnification, and the super-telephoto shooting performance of the optical lens 10 is better.

[0275] In the present embodiment, the distance LEL between the object side 1c of the mirror group 1 and the image side of the last lens of the lens group 2 arranged at least partially in the first direction and the height LH of the camera module 300 satisfy: LEL / LH = 0.62. It can be understood that by limiting the ratio of the distance LEL between the object side 1c of the mirror group 1 and the image side of the last lens of the lens group 2 arranged at least partially in the first direction to the height LH of the camera module 300 to be equal to 0.62, the height of the camera module 300 can be reduced, which is beneficial to reduce the shoulder height of the camera module 300, thereby facilitating the miniaturization of the camera module 300.

[0276] In the present embodiment, the distance LEL between the object side 1c of the mirror group 1 and the image side of the last lens of the lens group 2 arranged at least partially in the first direction and the total system optical length TTL of the camera module 300 satisfy: LEL / TTL = 0.21. It can be understood that by limiting the ratio of the distance LEL between the object side 1c of the mirror group 1 and the image side of the last lens of the lens group 2 arranged at least partially in the first direction to the total system optical length TTL of the camera module 300 to be equal to 0.21, the height of the optical lens 10 and the camera module 300 is reduced, which is beneficial to reduce the shoulder height of the optical lens 10 and the camera module 300, thereby facilitating the miniaturization of the optical lens 10 and the camera module 300.

[0277] The thickness CTR of the mirror group 1 and the maximum light transmission diameter LD of the area through which light passes through the object side 1c of the mirror group 1 satisfy the following condition: CTR / LD = 0.31. It can be understood that by limiting the ratio of the thickness CTR of the mirror group 1 to the maximum light transmission diameter LD of the area through which light passes through the object side 1c of the mirror group 1 to 0.31, the light reflected by the mirror group 1 is reduced, thus decreasing the height of the optical lens 10. This helps to reduce the shoulder height of the optical lens 10, thereby facilitating the miniaturization of the optical lens 10.

[0278] The maximum light-transmitting diameter LD of the area where light passes through the object-side surface 1c of the mirror group 1 and the maximum light-transmitting diameter LRD of the area where light exits the image-side surface 1d of the mirror group 1 satisfy the following ratio: LD / LRD = 3.33. It can be understood that by limiting the ratio of the maximum light-transmitting diameter LD of the area where light passes through the object-side surface 1c of the mirror group 1 to the maximum light-transmitting diameter LRD of the area where light exits the image-side surface 1d of the mirror group 1 to 3.33, the light reflected by the mirror group 1 is reduced, thus decreasing the height of the optical lens 10. This helps to reduce the shoulder height of the optical lens 10, thereby facilitating the miniaturization of the optical lens 10.

[0279] The height HP of the folding element 3, the image height IH of the optical lens 10, and the angle PA of the minimum acute angle inside the folding element 3 satisfy: HP - 1.25 × IH × tan(PA) = 0.30. It can be understood that by limiting HP - 1.25 × IH × tan(PA) to 0.30, the optical path is folded, thereby reducing the size of the optical lens 10 and facilitating its miniaturization.

[0280] In other embodiments, the form of the minimum acute angle inside the folding element 3 is not limited to... Figure 6 The sharp angles shown, for example, the smallest acute angle inside the folding element 3, can be rounded or ground into a flat surface according to actual needs in the manufacturing process. This application does not specifically limit the details.

[0281] Specifically, the maximum light-transmitting diameter LD of the area where light passes through the object side 1c of the mirror group 1 and the maximum light-transmitting diameter RD of the area where light passes through the first lens 21 satisfy the condition: LD / RD = 3.26. It can be understood that by limiting the ratio of the maximum light-transmitting diameter LD of the area where light passes through the object side 1c of the mirror group 1 to the maximum light-transmitting diameter RD of the area where light passes through the first lens 21 to 3.26, the light reflected by the mirror group 1 is reduced, while simultaneously intercepting the light and correcting off-axis aberrations.

[0282] The maximum reflected light diameter DOR of the region closest to the object side on the mirror group 1 where reflection occurs and the image height I H of the optical lens 10 satisfy: DOR / I H = 1.64. It can be understood that by limiting the ratio of the maximum reflected light diameter DOR of the region closest to the object side on the mirror group 1 where reflection occurs and the image height I H of the optical lens 10 to be equal to 1.64, the obstruction of the on-axis light is reduced, the loss of light is reduced, and thus the imaging quality of the optical lens 10 is improved.

[0283] Figure 7 is a simulation effect diagram of the telephoto end of the camera module 300 of the second embodiment.

[0284] As shown in Figure 7 , when the camera module 300 is at the telephoto end, the normalized coordinates of the camera module 300 are all small, the axial chromatic aberration (spherical aberration, chromatic aberration, etc.) correction of the camera module 300 is good, and the imaging quality of the camera module 300 is high.

[0285] Figure 8 is a simulation effect diagram of the telephoto end of the camera module 300 of the second embodiment. Figure Two .

[0286] As shown in Figure 8 , when the camera module 300 is at the telephoto end, both of the two direction curvatures are small, the camera module 300 has good depth of focus, and the imaging quality of the camera module 300 is high.

[0287] Figure 9 is a simulation effect diagram of the telephoto end of the camera module 300 of the second embodiment. Figure Three .

[0288] As shown in Figure 9 , when the camera module 300 is at the telephoto end, the optical distortion ratio of the camera module 300 at different image heights is less than 2%, which can ensure that the picture does not have obvious deformation, the degree of optical distortion of the image is small, and the imaging quality of the camera module 300 is high.

[0289] Third embodiment: please refer to Figure 10 , Figure 10 is Figure 1B the partial structure simplified schematic diagram of the camera module 300 in another embodiment. Figure Two .

[0290] In this embodiment, the camera module 300 includes, in order from the object side to the image side, a mirror group 1, a lens group 2, a folding element 3, a filter 30, and an image sensor 20.

[0291] Exemplarily, the mirror group 1 comprises a first reflective lens 11, and the exit surface 1b of the mirror group 1 can be located at a fourth sub-region 114 of an image-side surface 11b of the first reflective lens 11.

[0292] Exemplarily, after the light ray enters the first reflective lens 11, the first reflection occurs on a third sub-region 113 of the image-side surface 11b of the first reflective lens 11, the second reflection occurs on a second sub-region 112 of an object-side surface 11a of the first reflective lens 11, and then the light ray exits the first reflective lens 11 from a fourth sub-region 114 of the image-side surface 11b of the first reflective lens 11 and enters the lens group 2.

[0293] It can be understood that the second sub-region 112 of the object-side surface 11a of the first reflective lens 11 can be the closest reflective surface of the mirror group 1 to the object side. The second sub-region 112 of the object-side surface 11a of the first reflective lens 11 can be the second reflective surface 1f of the mirror group 1. In other embodiments, when the mirror group 1 adopts other structures, other regions of the mirror group 1 can also be the second reflective surface 1f of the mirror group 1.

[0294] It can be understood that the third sub-region 113 of the image-side surface 11b of the first reflective lens 11 can be the closest reflective surface of the mirror group 1 to the image side. The third sub-region 113 of the image-side surface 11b of the first reflective lens 11 can be the first reflective surface 1e of the mirror group 1. In other embodiments, when the mirror group 1 adopts other structures, other regions of the mirror group 1 can also be the first reflective surface 1e of the mirror group 1.

[0295] Exemplarily, the lens group 2 comprises three lenses. The lens group 2 comprises, in sequence from the object side to the image side, a first lens 21, a second lens 22, and a third lens 23.

[0296] Exemplarily, the cross section of the folding element 3 is substantially trapezoidal. The folding element 3 comprises a top surface 31 and a bottom surface 32 arranged oppositely, an entrance surface 33, an exit surface 34, a first reflective surface 35, and a second reflective surface 36, and the entrance surface 33 of the folding element 3 and the exit surface 34 of the folding element 3 are both located on the top surface 31 of the folding element 3. After the light ray passing through the mirror group 1 and the lens group 2 enters the folding element 3, the reflection occurs on the first reflective surface 35 of the folding element 3, the top surface 31 of the folding element 3, the bottom surface 32 of the folding element 3, and the second reflective surface 36 of the folding element 3. In an embodiment, the first reflection occurs on the first reflective surface 35 of the folding element 3, the second reflection occurs on the top surface 31 of the folding element 3, the third reflection occurs on the bottom surface 32 of the folding element 3, the fourth reflection occurs on the top surface 31 of the folding element 3, and the fifth reflection occurs on the second reflective surface 36 of the folding element 3.

[0297] It can be understood that the light can be reflected multiple times on the top surface 31, the bottom surface 32, the first reflecting surface 35 and the second reflecting surface 36 of the folding element 3, and the folding element 3 can increase the total length of the optical path. The folding element 3 can cooperate with the mirror group 1, and the total length of the optical path is further increased, thereby further facilitating the shooting at the long focal end of the optical lens 10. In addition, since the folding element 3 increases the total length of the optical path by reflection, the physical length and height of the optical lens 10 as a whole can be kept short, and the system optical total length of the camera module 300 is not easily significantly increased, which is beneficial to reduce the height of the optical lens 10, thereby realizing the miniaturization of the optical lens 10.

[0298] Exemplarily, by moving the image sensor 20, or the optical lens 10, or the first lens 21, the second lens 22 and the third lens 23 of the lens group 2, or the folding element 3, the automatic focusing of the camera module 300 is realized, and the imaging quality of the camera module 300 is improved.

[0299] The partial design parameters of the camera module 300 of the third embodiment of the present application are as shown in Table 7.

[0300] Table 7 Partial design parameters of each element of the camera module 300 of the third embodiment

[0301]

[0302]

[0303] It can be understood that in Table 7, OBJ can represent the object side of the optical lens 10; STO can represent the stop (not shown in the drawings); S1 can represent the first sub-region 111 of the object side 11a of the first reflecting lens 11; S2 can represent the third sub-region 113 of the image side 11b of the first reflecting lens 11; S3 can represent the second sub-region 112 of the image side 11b of the first reflecting lens 11; S4 can represent the fourth sub-region 114 of the image side 11b of the first reflecting lens 11; S5 and S6 can represent the object side and the image side of the first lens 21, respectively; S7 and S8 can represent the object side and the image side of the second lens 22, respectively; S9 and S10 can represent the object side and the image side of the third lens 23, respectively; S11 can represent the incident surface 33 of the folding element 3; S12 can represent the first reflecting surface 35 of the folding element 3; S13 can represent the top surface 31 of the folding element 3; S14 can represent the bottom surface 32 of the folding element 3; S15 can represent the top surface of the folding element 3; S16 can represent the second reflecting surface 36 of the folding element 3; S17 can represent the exit surface 34 of the folding element 3; S18 and S19 can represent the object side and the image side of the optical filter 30, respectively; and S20 can represent the imaging surface of the camera module.

[0304] In addition, the thickness of OBJ refers to the distance between the photographic subject and the object side surface of the optical lens 10. The thickness of S1 refers to the distance between the first sub-region 111 of the object side surface 11a of the first reflective lens 11 and the third sub-region 113 of the image side surface 11b of the first reflective lens 11. The thickness of S2 refers to the distance between the third sub-region 113 of the image side surface 11b of the first reflective lens 11 and the second sub-region 112 of the image side surface 11b of the first reflective lens 11. The thickness of S3 refers to the distance between the second sub-region 112 of the image side surface 11b of the first reflective lens 11 and the fourth sub-region 114 of the image side surface 11b of the first reflective lens 11. The thickness of S4 refers to the distance between the fourth sub-region 114 of the image side surface 11b of the first reflective lens 11 and the object side surface of the first lens 21. The thickness of S5 refers to the distance between the object side surface of the first lens 21 and the image side surface of the first lens 21. The thickness of S6 refers to the distance between the image side surface of the first lens 21 and the object side surface of the second lens 22. The thickness of S7 refers to the distance between the object side surface of the second lens 22 and the image side surface of the second lens 22. The thickness of S8 refers to the distance between the image side surface of the second lens 22 and the object side surface of the third lens 23. The thickness of S9 refers to the distance between the object side surface of the third lens 23 and the image side surface of the third lens 23. The thickness of S10 refers to the distance between the image side surface of the third lens 23 and the incident surface 33 of the folding element 3. The thickness of S11 refers to the distance between the incident surface 33 of the folding element 3 and the first reflective surface 35 of the folding element 3. The thickness of S12 refers to the distance between the first reflective surface 35 of the folding element 3 and the top surface 31 of the folding element 3. The thickness of S13 refers to the distance between the top surface 31 of the folding element 3 and the bottom surface 32 of the folding element 3. The thickness of S14 refers to the distance between the bottom surface 32 of the folding element 3 and the top surface 31 of the folding element 3. The thickness of S15 refers to the distance between the top surface 31 of the folding element 3 and the second reflective surface 36 of the folding element 3. The thickness of S16 refers to the distance between the second reflective surface 36 of the folding element 3 and the emergent surface 34 of the folding element 3. The thickness of S17 refers to the distance between the emergent surface 34 of the folding element 3 and the object side surface of the optical filter 30. The thickness of S18 refers to the distance between the object side surface of the optical filter 30 and the image side surface of the optical filter 30. The thickness of S19 refers to the distance between the image side surface of the optical filter 30 and the object side surface of the image sensor 20. S20 refers to the distance between the object side surface of the image sensor 20 and the imaging surface.

[0305] The optical lens 10 satisfies: FOV = 8.1°. It can be understood that by limiting the full field of view FOV of the optical lens 10 to be equal to 8.1°, the distortion and aberration of the image edge are reduced or avoided, and the full field of view FOV of the optical lens 10 is smaller, the field of view of the optical lens 10 is smaller, and the optical magnification is larger, which can better meet the super-telephoto design of the optical lens 10.

[0306] The folding element 3 satisfies: Vd = 42.7. It can be understood that the Abbe number of the folding element 3 is larger, which can reduce the dispersion and chromatic aberration problems in the optical lens 10, better correct the dispersion and chromatic aberration, and the resolution of the optical lens 10 is higher, and the imaging quality is clearer.

[0307] In addition, the aspheric coefficients of each element of the camera module 300 of the third embodiment of the present application are as shown in Table 8.

[0308] Table 8 Aspheric coefficients of each element of the camera module 300 of the third embodiment

[0309]

[0310]

[0311] It can be understood that among the 10 aspheres of the camera module 300 shown in Table 7 and Table 8, all even and odd aspheres z can be defined by, but not limited to, the following aspheric formula:

[0312]

[0313] Where z(x, y) is the optical surface sag; k is the conic coefficient; c is the curvature radius; r is the radius height in the optical axis direction; r 2 = x 2 +y 2 ; a i is the polynomial coefficient; r i is the normalized radial coordinate. By substituting the design parameters of the first reflective lens 11, the first lens 21, the second lens 22 and the third lens 23 of the optical lens 10 into the above aspheric formula, the surface shape of the object side and the image side of the first reflective lens 11, the first lens 21, the second lens 22 and the third lens 23 of the camera module 300 of the third embodiment of the present application can be obtained.

[0314] According to the data in Table 7 and Table 8, some parameters of the camera module 300 of the third embodiment of the present application can be obtained as shown in Table 9.

[0315] Table 9 Some parameters of the camera module 300 of the third embodiment

[0316] RBL EFL LEL LH TTL CTR LD 24.70 50.00 9.20 12.60 41.50 6.13 18.00 LRD HP IH PA RD DOR 4.30 3.20 3.60 25.00 4.50 7.00

[0317] It can be understood that the setting range of the related optical parameters in the embodiment can refer to the setting range of the related optical parameters in the first embodiment.

[0318] The back focal length RBL of the mirror group 1 (i.e., the sum of the absolute value of the thickness of S4 to the absolute value of the thickness of S17 in Table 7) and the focal length EFL of the optical lens 10 satisfy: RBL / EFL = 0.49. It can be understood that by limiting the ratio of the back focal length RBL of the mirror group 1 to the focal length EFL of the optical lens 10 to be equal to 0.49, it is ensured that the inside of the mirror group 1 has a space in which light can be reflected at least twice, and the optical lens 10 has sufficient space to arrange the lens group 2, so that the optical lens 10 has a higher magnification, and the super-telephoto shooting performance of the optical lens 10 is better.

[0319] The distance LEL between the object side 1c of the mirror group 1 and the image side of the last lens of the lens group 2 arranged in the first direction and the height LH of the camera module 300 satisfy: LEL / LH = 0.22. It can be understood that by limiting the ratio of the distance LEL between the object side 1c of the mirror group 1 and the image side of the last lens of the lens group 2 arranged in the first direction to the height LH of the camera module 300 to be equal to 0.22, the height of the camera module 300 can be reduced, which is beneficial to reduce the shoulder height of the camera module 300, thereby facilitating the miniaturization of the camera module 300.

[0320] The distance LEL between the object side 1c of the mirror group 1 and the image side of the last lens of the lens group 2 arranged in the first direction and the total system optical length TTL of the camera module 300 satisfy: LEL / TTL = 0.22. It can be understood that by limiting the ratio of the distance LEL between the object side 1c of the mirror group 1 and the image side of the last lens of the lens group 2 arranged in the first direction to the total system optical length TTL of the camera module 300 to be equal to 0.22, the height of the optical lens 10 and the camera module 300 is reduced, which is beneficial to reduce the shoulder height of the optical lens 10 and the camera module 300, thereby facilitating the miniaturization of the optical lens 10 and the camera module 300.

[0321] The thickness CTR of the mirror group 1 and the maximum light transmission diameter LD of the area through which light passes via the object side 1c of the mirror group 1 satisfy the condition: CTR / LD = 0.34. It can be understood that by limiting the ratio of the thickness CTR of the mirror group 1 to the maximum light transmission diameter LD of the area through which light passes via the object side 1c of the mirror group 1 to 0.34, the light reflected by the mirror group 1 is reduced, thus decreasing the height of the optical lens 10. This helps to reduce the shoulder height of the optical lens 10, thereby facilitating the miniaturization of the optical lens 10.

[0322] Specifically, the maximum light-transmitting diameter LD of the area where light passes through the object-side surface 1c of the mirror group 1 and the maximum light-transmitting diameter LRD of the area where light exits the image-side surface 1d of the mirror group 1 satisfy the following ratio: LD / LRD = 4.19. It can be understood that by limiting the ratio of the maximum light-transmitting diameter LD of the area where light passes through the object-side surface 1c of the mirror group 1 to the maximum light-transmitting diameter LRD of the area where light exits the image-side surface 1d of the mirror group 1 to 4.19, the light reflected by the mirror group 1 is reduced, thus decreasing the height of the optical lens 10. This helps to reduce the shoulder height of the optical lens 10, thereby facilitating the miniaturization of the optical lens 10.

[0323] The height HP of the folding element 3, the image height IH of the optical lens 10, and the angle PA of the minimum acute angle inside the folding element 3 satisfy: HP - 1.25 × IH × tan(PA) = 1.02. It can be understood that by limiting HP - 1.25 × IH × tan(PA) to 1.02, it is beneficial to fold the optical path, thereby reducing the size of the optical lens 10 and facilitating its miniaturization.

[0324] In other embodiments, the form of the minimum acute angle inside the folding element 3 is not limited to... Figure 10 The sharp angles shown, for example, the smallest acute angle inside the folding element 3, can be rounded or ground into a flat surface according to actual needs in the manufacturing process. This application does not specifically limit the details.

[0325] Specifically, the maximum light-transmitting diameter LD of the area where light passes through the object side 1c of the mirror group 1 and the maximum light-transmitting diameter RD of the area where light passes through the first lens 21 satisfy the condition: LD / RD = 4.00. It can be understood that by limiting the ratio of the maximum light-transmitting diameter LD of the area where light passes through the object side 1c of the mirror group 1 to the maximum light-transmitting diameter RD of the area where light passes through the first lens 21 to 4.00, the light reflected by the mirror group 1 is reduced, while simultaneously intercepting the light and correcting off-axis aberrations.

[0326] The maximum reflected light diameter DOR of the region closest to the object side on the mirror group 1 where reflection occurs and the image height I H of the optical lens 10 satisfy: DOR / I H = 1.94. It can be understood that by limiting the ratio of the maximum reflected light diameter DOR of the region closest to the object side on the mirror group 1 where reflection occurs and the image height I H of the optical lens 10 to be equal to 1.94, the obstruction of the on-axis light is reduced, the loss of light is reduced, and thus the imaging quality of the optical lens 10 is improved.

[0327] Figure 11 is a simulation effect diagram of the telephoto end of the camera module 300 of the third implementation.

[0328] As shown in Figure 11 , when the camera module 300 is at the telephoto end, the normalized coordinates of the camera module 300 are all small, the along-axis chromatic aberration (spherical aberration, chromatic aberration, etc.) correction of the camera module 300 is good, and the imaging quality of the camera module 300 is high.

[0329] Figure 12 is a simulation effect diagram of the telephoto end of the camera module 300 of the third implementation. Figure Two .

[0330] As shown in Figure 12 , when the camera module 300 is at the telephoto end, both of the two direction curvatures are small, the camera module 300 has good depth of focus, and the imaging quality of the camera module 300 is high.

[0331] Figure 13 is a simulation effect diagram of the telephoto end of the camera module 300 of the third implementation. Figure Three .

[0332] As shown in Figure 13 , when the camera module 300 is at the telephoto end, the optical distortion ratio of the camera module 300 at different image heights is less than 2%, which can ensure that the picture does not have obvious deformation, the degree of optical distortion of the image is small, and the imaging quality of the camera module 300 is high.

[0333] Fourth implementation: please refer to Figure 14 , Figure 14 is Figure 1B the partial structure simplified schematic diagram of the camera module 300 in another implementation. Figure Three .

[0334] In this implementation, the camera module 300 includes, in order from the object side to the image side, a mirror group 1, a lens group 2, a folding element 3, a filter 30, and an image sensor 20.

[0335] Exemplarily, the mirror group 1 comprises a first reflective lens 11, and the exit surface 1b of the mirror group 1 can be located at a fourth sub-region 114 of an image-side surface 11b of the first reflective lens 11.

[0336] Exemplarily, after the light ray enters the first reflective lens 11, the first reflection occurs on a third sub-region 113 of the image-side surface 11b of the first reflective lens 11, the second reflection occurs on a second sub-region 112 of an object-side surface 11a of the first reflective lens 11, and then the light ray exits the first reflective lens 11 from a fourth sub-region 114 of the image-side surface 11b of the first reflective lens 11 and enters the lens group 2.

[0337] It can be understood that the second sub-region 112 of the object-side surface 11a of the first reflective lens 11 can be the closest reflective surface of the mirror group 1 to the object side. The second sub-region 112 of the object-side surface 11a of the first reflective lens 11 can be the second reflective surface 1f of the mirror group 1. In other embodiments, when the mirror group 1 adopts other structures, other regions of the mirror group 1 can also be the second reflective surface 1f of the mirror group 1.

[0338] It can be understood that the third sub-region 113 of the image-side surface 11b of the first reflective lens 11 can be the closest reflective surface of the mirror group 1 to the image side. The third sub-region 113 of the image-side surface 11b of the first reflective lens 11 can be the first reflective surface 1e of the mirror group 1. In other embodiments, when the mirror group 1 adopts other structures, other regions of the mirror group 1 can also be the first reflective surface 1e of the mirror group 1.

[0339] Exemplarily, the lens group 2 comprises three lenses. The lens group 2 comprises, in sequence from the object side to the image side, a first lens 21, a second lens 22, and a third lens 23.

[0340] Exemplarily, the cross section of the folding element 3 is approximately a parallelogram. The folding element 3 comprises a top surface 31 and a bottom surface 32 arranged oppositely, an entrance surface 33, an exit surface 34, a first reflective surface 35, and a second reflective surface 36. The entrance surface 33 of the folding element 3 is located at the top surface 31 of the folding element 3, and the exit surface 34 of the folding element 3 is located at the bottom surface 32 of the folding element 3. After the light ray passing through the mirror group 1 and the lens group 2 enters the folding element 3, the reflection occurs on the first reflective surface 35 of the folding element 3, the top surface 31 of the folding element 3, and the second reflective surface 36 of the folding element 3. In an embodiment, the first reflection occurs on the first reflective surface 35 of the folding element 3, the second reflection occurs on the top surface 31 of the folding element 3, and the third reflection occurs on the second reflective surface 36 of the folding element 3.

[0341] It can be understood that the light can be reflected multiple times on the top surface 31 of the folding element 3, the first reflection surface 35 and the second reflection surface 36, and the folding element 3 can increase the total length of the optical path. The folding element 3 can cooperate with the mirror group 1, and the total length of the optical path is further increased, thereby further facilitating the long focal end shooting of the optical lens 10. In addition, since the folding element 3 increases the total length of the optical path by reflection, the physical length and height of the optical lens 10 as a whole can be kept short, and the system optical total length of the camera module 300 is not easily increased obviously, which is beneficial to reduce the height of the optical lens 10, thereby realizing the miniaturization of the optical lens 10.

[0342] Exemplarily, by moving the image sensor 20, or the optical lens 10, or the first lens 21, the second lens 22 and the third lens 23 of the lens group 2, or the folding element 3, the automatic focusing of the camera module 300 is realized, and the imaging quality of the camera module 300 is improved.

[0343] The partial design parameters of the camera module 300 of the fourth embodiment of the present application are as shown in Table 10.

[0344] Table 10 Partial design parameters of each element of the camera module 300 of the fourth embodiment

[0345]

[0346] It can be understood that in Table 10, OBJ can represent the object side of the optical lens 10; STO can represent the stop (not shown in the drawings); S1 can represent the first sub-region 111 of the object side 11a of the first reflection lens 11; S2 can represent the third sub-region 113 of the image side 11b of the first reflection lens 11; S3 can represent the second sub-region 112 of the image side 11b of the first reflection lens 11; S4 can represent the fourth sub-region 114 of the image side 11b of the first reflection lens 11; S5 and S6 can represent the object side and the image side of the first lens 21, respectively; S7 and S8 can represent the object side and the image side of the second lens 22, respectively; S9 and S10 can represent the object side and the image side of the third lens 23, respectively; S11 can represent the incident surface 33 of the folding element 3; S12 can represent the first reflection surface 35 of the folding element 3; S13 can represent the top surface 31 of the folding element 3; S14 can represent the bottom surface 32 of the folding element 3; S15 can represent the second reflection surface 36 of the folding element 3; S16 can represent the exit surface 34 of the folding element 3; S17 and S18 can represent the object side and the image side of the optical filter 30, respectively; and S19 can represent the imaging surface of the camera module.

[0347] In addition, the thickness of OBJ refers to the distance between the object and the object side of the optical lens 10. The thickness of S1 refers to the distance between the first sub-region 111 of the object side 11a of the first reflective lens 11 and the third sub-region 113 of the image side 11b of the first reflective lens 11. The thickness of S2 refers to the distance between the third sub-region 113 of the image side 11b of the first reflective lens 11 and the second sub-region 112 of the image side 11b of the first reflective lens 11. The thickness of S3 refers to the distance between the second sub-region 112 of the image side 11b of the first reflective lens 11 and the fourth sub-region 114 of the image side 11b of the first reflective lens 11. The thickness of S4 refers to the distance between the fourth sub-region 114 of the image side 11b of the first reflective lens 11 and the object side of the first lens 21. The thickness of S5 refers to the distance between the object side of the first lens 21 and the image side of the first lens 21. The thickness of S6 refers to the distance between the image side of the first lens 21 and the object side of the second lens 22. The thickness of S7 refers to the distance between the object side of the second lens 22 and the image side of the second lens 22. The thickness of S8 refers to the distance between the image side of the second lens 22 and the object side of the third lens 23. The thickness of S9 refers to the distance between the object side of the third lens 23 and the image side of the third lens 23. The thickness of S10 refers to the distance between the image side of the third lens 23 and the incident surface 33 of the folding element 3. The thickness of S11 refers to the distance between the incident surface 33 of the folding element 3 and the first reflective surface 35 of the folding element 3. The thickness of S12 refers to the distance between the first reflective surface 35 of the folding element 3 and the top surface 31 of the folding element 3. The thickness of S13 refers to the distance between the top surface 31 of the folding element 3 and the bottom surface 32 of the folding element 3. The thickness of S14 refers to the distance between the bottom surface 32 of the folding element 3 and the second reflective surface 36 of the folding element 3. The thickness of S15 refers to the distance between the second reflective surface 36 of the folding element 3 and the emergent surface 34 of the folding element 3. The thickness of S16 refers to the distance between the emergent surface 34 of the folding element 3 and the object side of the optical filter 30. The thickness of S17 refers to the distance between the object side of the optical filter 30 and the image side of the optical filter 30. The thickness of S18 refers to the distance between the image side of the optical filter 30 and the object side of the image sensor 20. S19 refers to the distance between the object side of the image sensor 20 and the imaging surface.

[0348] In the present embodiment, the optical lens 10 satisfies: FOV = 11°. It can be understood that by limiting the full field of view FOV of the optical lens 10 to be equal to 11°, the distortion and the aberration of the image edge are reduced or avoided, and the full field of view FOV of the optical lens 10 is smaller, the field of view of the optical lens 10 is smaller, and the optical magnification is larger, which can better meet the super-telephoto design of the optical lens 10.

[0349] The folding element 3 satisfies Vd=42.7. It can be understood that the Abbe number of the folding element 3 is large, which can reduce the dispersion and chromatic aberration problems in the optical lens 10, better correct the dispersion and chromatic aberration, the resolution of the optical lens 10 is higher, and the imaging quality is clearer.

[0350] In addition, the aspheric coefficients of each element of the camera module 300 of the fourth embodiment of the present application are as shown in Table 11.

[0351] Table 11 Aspheric coefficients of each element of the camera module 300 of the fourth embodiment

[0352] Surface 1 2 3 4 [A4] 1.3627485644E-05 5.3357697052E-05 7.4411194270E-04 -3.3858923605E-03 [A6] -1.3214024925E-07 4.3447479905E-09 -1.3758483584E-05 -1.6028443238E-04 [A8] 2.4824424877E-09 7.6855214209E-10 1.0536789095E-06 -2.4668177715E-05 A 10 ]]> -5.3349210038E-11 -2.5379100916E-12 -6.0540358023E-08 1.0855542271E-05 A 12 ]]> 8.6457104182E-13 1.1938043343E-14 1.3149776682E-09 -2.6163822641E-06 A 14 ]]> -6.9871094027E-15 -6.5896194236E-16 / 1.4746709682E-07 Surface 5 6 7 8 [A4] -1.7002089890E-02 -1.7753181039E-02 1.3661647146E-02 1.6819659337E-02 [A6] 2.4859265884E-03 3.5810950905E-03 2.4994216921E-04 1.7179904315E-03 [A8] 8.0103651075E-04 -6.8397740292E-06 -3.3937249369E-04 -5.6236309691E-04 A 10 ]]> -2.6606646159E-04 -8.9429466958E-05 1.3072502257E-05 5.6367750355E-05 A 12 ]]> 3.1688163671E-05 1.5400679464E-05 7.3017011669E-06 3.4152564515E-07 A 14 ]]> -1.3815179461E-06 -7.6038416216E-07 -8.1744293337E-07 -4.0109348034E-07 Surface 9 10 [A4] -1.3467372907E-02 -2.1134904471E-02 [A6] 3.3012283058E-03 4.3507674130E-03 [A8] -7.7679155367E-04 -8.0559966800E-04 A 10 ]]> 1.2578488314E-04 1.0143278259E-04 A 12 ]]> -1.0536604176E-05 -6.7001388579E-06 A 14 ]]> 3.4057855044E-07 1.7379314120E-07

[0353] It can be understood that among the 10 aspheric surfaces of the camera module 300 shown in Table 10 and Table 11, all the even and odd aspheric surface types z can be defined by, but not limited to, the following aspheric formula:

[0354]

[0355] wherein z(x, y) is the optical surface sag; k is the conic coefficient; c is the curvature radius; r is the radius height in the optical axis direction; r 2 = x 2 +y 2 ; a i is the polynomial coefficient; r i is the normalized radial coordinate. By substituting the design parameters of the first reflective lens 11, the first lens 21, the second lens 22 and the third lens 23 of the optical lens 10 into the above aspheric formula, the surface types of the object side and the image side of the first reflective lens 11, the first lens 21, the second lens 22 and the third lens 23 of the camera module 300 of the fourth embodiment of the present application can be obtained.

[0356] According to the data in Table 10 and Table 11, part of the parameters of the camera module 300 of the fourth embodiment of the present application can be obtained as shown in Table 12.

[0357] Table 12 Part of the parameters of the camera module 300 of the fourth embodiment

[0358] RBL EFL LEL LH TTL CTR LD 18.80 37.00 8.30 11.00 31.10 4.75 16.00 LRD HP IH PA RD DOR 4.00 2.70 3.60 27.00 4.40 6.60

[0359] It can be understood that the setting range of the related optical parameters in the present embodiment can refer to the setting range of the related optical parameters in the first embodiment.

[0360] The back focal length RBL of the mirror group 1 (i.e., the sum of the absolute value of the thickness of S4 and the absolute value of the thickness of S18 in Table 10) and the focal length EFL of the optical lens 10 satisfy: RBL / EFL = 0.51. It can be understood that by limiting the ratio of the back focal length RBL of the mirror group 1 to the focal length EFL of the optical lens 10 to be equal to 0.51, it is ensured that the inside of the mirror group 1 has a space in which light can be reflected at least twice, and the optical lens 10 has sufficient space to arrange the lens group 2, so that the optical lens 10 has a higher magnification, and the ultra-long focal shooting performance of the optical lens 10 is better.

[0361] The distance LEL between the object side 1c of the mirror group 1 and the image side of the last lens of the lens group 2 arranged in the first direction and the height LH of the camera module 300 satisfy: LEL / LH = 0.75. It can be understood that by limiting the ratio of the distance LEL between the object side 1c of the mirror group 1 and the image side of the last lens of the lens group 2 arranged in the first direction to the height LH of the camera module 300 to be equal to 0.75, the height of the camera module 300 can be reduced, which is beneficial to reduce the shoulder height of the camera module 300, thereby facilitating the miniaturization of the camera module 300.

[0362] The distance LEL between the object side 1c of the mirror group 1 and the image side of the last lens of the lens group 2 arranged in the first direction and the total system optical length TTL of the camera module 300 satisfy: LEL / TTL = 0.27. It can be understood that by limiting the ratio of the distance LEL between the object side 1c of the mirror group 1 and the image side of the last lens of the lens group 2 arranged in the first direction to the total system optical length TTL of the camera module 300 to be equal to 0.27, the height of the optical lens 10 and the camera module 300 is reduced, which is beneficial to reduce the shoulder height of the optical lens 10 and the camera module 300, thereby facilitating the miniaturization of the optical lens 10 and the camera module 300.

[0363] The thickness CTR of the mirror group 1 and the maximum light passing diameter LD of the region through which light passes the object side 1c of the mirror group 1 satisfy: CTR / LD = 0.30. It can be understood that by limiting the ratio of the thickness CTR of the mirror group 1 to the maximum light passing diameter LD of the region through which light passes the object side 1c of the mirror group 1 to be equal to 0.30, the light reflected by the mirror group 1 is contracted, the height of the optical lens 10 is reduced, which is beneficial to reduce the shoulder height of the optical lens 10, thereby facilitating the miniaturization of the optical lens 10.

[0364] Wherein, the maximum light passing diameter LD of the region of the object side surface 1c of the mirror group 1 through which the light passes and the maximum light passing diameter LRD of the region of the image side surface 1d of the mirror group 1 from which the light exits satisfy: LD / LRD=4.00. It can be understood that by limiting the ratio of the maximum light passing diameter LD of the region of the object side surface 1c of the mirror group 1 through which the light passes and the maximum light passing diameter LRD of the region of the image side surface 1d of the mirror group 1 from which the light exits to be equal to 4.00, the light reflected by the mirror group 1 is contracted, the height of the optical lens 10 is reduced, which is beneficial to reduce the shoulder height of the optical lens 10, thereby facilitating the miniaturized arrangement of the optical lens 10.

[0365] Wherein, the height HP of the folding element 3, the image height I H of the optical lens 10, and the angle PA of the smallest acute angle inside the folding element 3 satisfy: HP-1.25xI Hxtan(PA)=0.32. It can be understood that by limiting HP-1.25xI Hxtan(PA) to be equal to 0.32, the folded optical path is facilitated, thereby reducing the volume of the optical lens 10, which is beneficial to the miniaturized arrangement of the optical lens 10.

[0366] In other embodiments, the form of the smallest acute angle inside the folding element 3 is not limited to the sharp corner form shown in the figure, for example, the smallest acute angle inside the folding element 3 can be rounded or ground into a flat surface according to actual needs. Specifically, the present application is not limited. Figure 14

[0367] Wherein, the maximum light passing diameter LD of the region of the object side surface 1c of the mirror group 1 through which the light passes and the maximum light passing diameter RD of the region of the first lens 21 through which the light passes satisfy: LD / RD=3.64. It can be understood that by limiting the ratio of the maximum light passing diameter LD of the region of the object side surface 1c of the mirror group 1 through which the light passes and the maximum light passing diameter RD of the region of the first lens 21 through which the light passes to be equal to 3.64, the light reflected by the mirror group 1 is contracted, the light is intercepted, and the off-axis aberration is corrected.

[0368] Wherein, the maximum reflection light diameter DOR of the region closest to the object side on the mirror group 1 where reflection occurs and the image height I H of the optical lens 10 satisfy: DOR / I H=1.83. It can be understood that by limiting the ratio of the maximum reflection light diameter DOR of the region closest to the object side on the mirror group 1 where reflection occurs and the image height I H of the optical lens 10 to be equal to 1.83, the on-axis light is reduced, the loss of light is reduced, and the imaging quality of the optical lens 10 is improved.

[0369] Figure 15 is a simulation effect diagram of the telephoto end of the camera module 300 of the fourth embodiment.

[0370] As shown in Figure 15 ​As shown, when the camera module 300 is at the telephoto end, the normalized coordinates of the camera module 300 are all small, the axial chromatic aberration (spherical aberration, chromatic aberration, etc.) correction of the camera module 300 is good, and the imaging quality of the camera module 300 is high.

[0371] Figure 16 This is a simulation effect of the telephoto end of the camera module 300 in the fourth implementation method. Figure Two .

[0372] like Figure 16 As shown, when the camera module 300 is at the telephoto end, the field curvature in both directions is small, the camera module 300 has a good depth of focus, and the imaging quality of the camera module 300 is high.

[0373] Figure 17 This is a simulation effect of the telephoto end of the camera module 300 in the fourth implementation method. Figure Three .

[0374] like Figure 17 As shown, when the camera module 300 is at the telephoto end, the optical distortion ratio of the camera module 300 at different image heights is less than 1%, which can ensure that there is no obvious distortion in the image, the degree of optical distortion of the image is small, and the imaging quality of the camera module 300 is high.

[0375] Fifth implementation method: Please refer to Figure 18 , Figure 18 yes Figure 1B The simplified schematic diagram of part of the structure of the camera module 300 in another embodiment shown. Figure Four .

[0376] In this embodiment, the camera module 300 includes a mirror group 1, a lens group 2, a folding element 3, a filter 30, and an image sensor 20 arranged sequentially from the object side to the image side.

[0377] For example, the mirror assembly 1 includes a first reflecting lens 11, and the exit surface 1b of the mirror assembly 1 may be located in the fourth sub-region 114 of the image side surface 11b of the first reflecting lens 11.

[0378] For example, after light enters the first reflecting lens 11, it undergoes a first reflection on the third sub-region 113 of the image side 11b of the first reflecting lens 11, a second reflection on the second sub-region 112 of the object side 11a of the first reflecting lens 11, and then exits the first reflecting lens 11 from the fourth sub-region 114 of the image side 11b of the first reflecting lens 11 and enters the lens group 2.

[0379] It can be understood that the second sub-area 112 of the object-side surface 11a of the first reflecting lens 11 can be the closest object-side reflecting surface of the mirror group 1. The second sub-area 112 of the object-side surface 11a of the first reflecting lens 11 can be the second reflecting surface 1f of the mirror group 1. In other embodiments, when the mirror group 1 adopts other structures, other areas of the mirror group 1 can also be the second reflecting surface 1f of the mirror group 1.

[0380] It can be understood that the third sub-area 113 of the image-side surface 11b of the first reflecting lens 11 can be the closest image-side reflecting surface of the mirror group 1. The third sub-area 113 of the image-side surface 11b of the first reflecting lens 11 can be the first reflecting surface 1e of the mirror group 1. In other embodiments, when the mirror group 1 adopts other structures, other areas of the mirror group 1 can also be the first reflecting surface 1e of the mirror group 1.

[0381] Exemplarily, the lens group 2 can include the light transfer element 24 and one or more lenses, the one or more lenses being located on the image side of the light transfer element 24, and the light transfer element 24 can be used to change the optical axis in the first direction to the second direction, the first direction being different from the second direction.

[0382] It can be understood that the light transfer element 24 changes the optical axis in the first direction to the second direction, which can reduce the height of the optical lens 10 in the first direction, and is conducive to reducing the shoulder height of the optical lens 10, and is conducive to realizing the miniaturization of the optical lens 10.

[0383] Exemplarily, the lens group 2 can include three lenses, and the lens group 2 includes, in order from the object side to the image side, the light transfer element 24, the first lens 21, the second lens 22, and the third lens 23.

[0384] Exemplarily, the light transfer element 24 includes an incident surface 241, an exit surface 242, and a reflecting surface 243, the incident surface 241 of the light transfer element 24 is connected to the exit surface 242 of the light transfer element 24, the reflecting surface 243 of the light transfer element 24 is connected to the incident surface 241 of the light transfer element 24 and the exit surface 242 of the light transfer element 24, and the incident surface 241 of the light transfer element 24 can be arranged to face the exit surface 1b of the mirror group 1, and the exit surface 242 of the light transfer element 24 can be arranged to face the one or more lenses, that is, the exit surface 242 of the light transfer element 24 can be arranged to face the first lens 21.

[0385] Exemplarily, the light passing through the first reflecting lens 11 enters the light transfer element 24 through the incident surface 241 of the light transfer element 24, is reflected on the reflecting surface 243 of the light transfer element 24, and then exits the light transfer element 24 through the exit surface 242 of the light transfer element 24 and enters the first lens 21.

[0386] It can be understood that the light conversion path element 24 can cooperate with the mirror group 1 and the folding element 3, and the total length of the optical path is further increased, thereby further facilitating the long-focus end shooting of the optical lens 10. In addition, since the light conversion path element 24 increases the total length of the optical path by reflection, the physical length and height of the optical lens 10 as a whole can be kept short, which is conducive to reducing the height of the optical lens 10, thereby achieving the miniaturized setting of the optical lens 10.

[0387] Exemplarily, the cross section of the folding element 3 is roughly triangular. The folding element 3 includes a first surface 37, a second surface 38, and a reflection surface 39. The first surface 37 of the folding element 3 is connected to the second surface 38 of the folding element 3, and the reflection surface of the folding element 3 is connected to the first surface 37 of the folding element 3 and the second surface 38 of the folding element 3. The incident surface 33 of the folding element 3 can be located on the first surface 37 of the folding element 3, and the exit surface 34 of the folding element 3 can be located on the second surface 38 of the folding element 3. After the light enters the folding element 3, reflection occurs on the second surface 38 of the folding element 3 and the reflection surface 39 of the folding element 3. In an embodiment, the first reflection occurs on the second surface 38 of the folding element 3. The second reflection occurs on the reflection surface 39 of the folding element 3.

[0388] It can be understood that the light can be reflected multiple times on the second surface 38 and the reflection surface 39 of the folding element 3, and the folding element 3 can increase the total length of the optical path. The folding element 3 can cooperate with the mirror group 1, and the total length of the optical path is further increased, thereby further facilitating the long-focus end shooting of the optical lens 10. In addition, since the folding element 3 increases the total length of the optical path by reflection, the physical length and height of the optical lens 10 as a whole can be kept short, and the system total length of the camera module 300 is not easily significantly increased, which is conducive to reducing the height of the optical lens 10, thereby achieving the miniaturized setting of the optical lens 10.

[0389] Exemplarily, the automatic focusing of the camera module 300 is achieved by moving the image sensor 20, or the optical lens 10, or the first lens 21, the second lens 22, and the third lens 23 of the lens group 2, or the folding element 3, thereby improving the imaging quality of the camera module 300.

[0390] The design parameters of the camera module 300 of the fifth embodiment of the present application are as shown in Table 13.

[0391] Table 13 Partial design parameters of each element of the camera module 300 of the fifth embodiment

[0392]

[0393] It can be understood that in Table 13, OBJ can represent the object side of the optical lens 10; STO can represent a stop (not shown in the drawings); S1 can represent a first sub-region 111 of the object side 11a of the first reflective lens 11; S2 can represent a third sub-region 113 of the image side 11b of the first reflective lens 11; S3 can represent a second sub-region 112 of the image side 11b of the first reflective lens 11; S4 can represent a fourth sub-region 114 of the image side 11b of the first reflective lens 11; S5 can represent an incident surface 241 of the light conversion element 24; S6 can represent a reflective surface 243 of the light conversion element 24; S7 can represent an emergent surface 242 of the light conversion element 24; S8 and S9 can represent the object side and the image side of the first lens 21, respectively; S10 and S11 can represent the object side and the image side of the second lens 22, respectively; S12 and S13 can represent the object side and the image side of the third lens 23, respectively; S14 can represent the first surface 37 of the folding element 3; S15 can represent the second surface 38 of the folding element 3; S16 can represent the reflective surface 39 of the folding element 3; S17 can represent the second surface 38 of the folding element 3; S18 and S19 can represent the object side and the image side of the optical filter 30, respectively; and S20 can represent the imaging surface of the camera module.

[0394] Further, the thickness of OBJ refers to the distance between the photographic subject and the object side surface of the optical lens 10. The thickness of S1 refers to the distance between the first sub-region 111 of the object side surface 11a of the first reflecting lens 11 and the third sub-region 113 of the image side surface 11b of the first reflecting lens 11. The thickness of S2 refers to the distance between the third sub-region 113 of the image side surface 11b of the first reflecting lens 11 and the second sub-region 112 of the image side surface 11b of the first reflecting lens 11. The thickness of S3 refers to the distance between the second sub-region 112 of the image side surface 11b of the first reflecting lens 11 and the fourth sub-region 114 of the image side surface 11b of the first reflecting lens 11. The thickness of S4 refers to the distance between the fourth sub-region 114 of the image side surface 11b of the first reflecting lens 11 and the incident surface 241 of the light turning path element 24. The thickness of S5 refers to the distance between the incident surface 241 of the light turning path element 24 and the reflecting surface 243 of the light turning path element 24. The thickness of S6 refers to the distance between the reflecting surface 243 of the light turning path element 24 and the emergent surface 242 of the light turning path element 24. The thickness of S7 refers to the distance between the emergent surface 242 of the light turning path element 24 and the object side surface of the first lens 21. The thickness of S8 refers to the distance between the object side surface of the first lens 21 and the image side surface of the first lens 21. The thickness of S9 refers to the distance between the image side surface of the first lens 21 and the object side surface of the second lens 22. The thickness of S10 refers to the distance between the object side surface of the second lens 22 and the image side surface of the second lens 22. The thickness of S11 refers to the distance between the image side surface of the second lens 22 and the object side surface of the third lens 23. The thickness of S12 refers to the distance between the object side surface of the third lens 23 and the image side surface of the third lens 23. The thickness of S13 refers to the distance between the image side surface of the third lens 23 and the first surface 37 of the folding element 3. The thickness of S14 refers to the distance between the first surface 37 of the folding element 3 and the second surface 38 of the folding element 3. The thickness of S15 refers to the distance between the second surface 38 of the folding element 3 and the reflecting surface 39 of the folding element 3. The thickness of S16 refers to the distance between the reflecting surface 39 of the folding element 3 and the second surface 38 of the folding element 3. The thickness of S17 refers to the distance between the second surface 38 of the folding element 3 and the object side surface of the optical filter 30. The thickness of S18 refers to the distance between the object side surface of the optical filter 30 and the image side surface of the optical filter 30. The thickness of S19 refers to the distance between the image side surface of the optical filter 30 and the object side surface of the image sensor 20. S20 refers to the distance between the object side surface of the image sensor 20 and the imaging surface.

[0395] The optical lens 10 satisfies: FOV = 8.1°. It can be understood that by limiting the full field of view FOV of the optical lens 10 to be equal to 8.1°, the distortion and aberration of the image edge are reduced or avoided, and the full field of view FOV of the optical lens 10 is smaller, the field of view of the optical lens 10 is smaller, and the optical magnification is larger, which can better meet the super-telephoto design of the optical lens 10.

[0396] The folding element 3 satisfies: Vd = 42.7. It can be understood that the Abbe number of the folding element 3 is larger, which can reduce the dispersion and chromatic aberration problems in the optical lens 10, better correct the dispersion and chromatic aberration, and the resolution of the optical lens 10 is higher, and the imaging quality is clearer.

[0397] In addition, the aspheric coefficients of each element of the camera module 300 of the fifth embodiment of the present application are as shown in Table 14.

[0398] Table 14 Aspheric coefficients of each element of the camera module 300 of the fifth embodiment

[0399]

[0400]

[0401] It can be understood that among the 13 aspheres of the camera module 300 shown in Table 13 and Table 14, all the even and odd aspheres z can be defined by, but not limited to, the following aspheric formula:

[0402]

[0403] where z(x, y) is the optical surface sag; k is the conic coefficient; c is the curvature radius; r is the radius height in the optical axis direction; r 2 = x 2 +y 2 ; a i is the polynomial coefficient; r i is the normalized radial coordinate. By substituting the design parameters of the first reflective lens 11, the first lens 21, the second lens 22 and the third lens 23 of the optical lens 10 into the above aspheric formula, the surface shape of the object side and the image side of the first reflective lens 11, the first lens 21, the second lens 22 and the third lens 23 of the camera module 300 of the fifth embodiment of the present application can be obtained.

[0404] According to the data in Table 13 and Table 14, part of the parameters of the camera module 300 of the fifth embodiment of the present application can be obtained as shown in Table 15.

[0405] Table 15 Part of the parameters of the camera module 300 of the fifth embodiment

[0406] RBL EFL LEL LH TTL CTR LD 22.43 45.00 5.70 12.40 27.30 5.70 20.00 LRD HP IH PA RD DOR 6.20 6.90 5.12 28.00 7.60 9.00

[0407] It can be understood that the setting range of the related optical parameters in the embodiment can refer to the setting range of the related optical parameters in the first embodiment.

[0408] Wherein, the back focal length RBL of the mirror group 1 (that is, the sum of the absolute value of the thickness of S7 to the absolute value of the thickness of S19 in Table 13) and the focal length EFL of the optical lens 10 satisfy: RBL / EFL=0.50. It can be understood that by limiting the ratio of the back focal length RBL of the mirror group 1 to the focal length EFL of the optical lens 10 to be equal to 0.50, it is ensured that the inside of the mirror group 1 has a space in which light can be reflected at least twice, and the optical lens 10 has sufficient space to arrange the lens group 2, so that the optical lens 10 has a higher magnification, and the super-telephoto shooting performance of the optical lens 10 is better.

[0409] Wherein, the distance LEL between the object side 1c of the mirror group 1 and the image side 1d of the mirror group 1 and the height LH of the camera module 300 satisfy: LEL / LH=0.46. It can be understood that by limiting the ratio of the distance LEL between the object side 1c of the mirror group 1 and the image side 1d of the mirror group 1 to the height LH of the camera module 300 to be equal to 0.46, the height of the camera module 300 can be reduced, which is beneficial to reduce the shoulder height of the camera module 300, thereby facilitating the miniaturization of the camera module 300.

[0410] Wherein, the distance LEL between the object side 1c of the mirror group 1 and the image side 1d of the mirror group 1 and the total system optical length TTL of the camera module 300 satisfy: LEL / TTL=0.21. It can be understood that by limiting the ratio of the distance LEL between the object side 1c of the mirror group 1 and the image side 1d of the mirror group 1 to the total system optical length TTL of the camera module 300 to be equal to 0.21, the height of the optical lens 10 and the camera module 300 is reduced, which is beneficial to reduce the shoulder height of the optical lens 10 and the camera module 300, thereby facilitating the miniaturization of the optical lens 10 and the camera module 300.

[0411] Wherein, the thickness CTR of the mirror group 1 and the maximum light passing diameter LD of the region through which light passes the object side 1c of the mirror group 1 satisfy: CTR / LD=0.29. It can be understood that by limiting the ratio of the thickness CTR of the mirror group 1 to the maximum light passing diameter LD of the region through which light passes the object side 1c of the mirror group 1 to be equal to 0.29, the light reflected by the mirror group 1 is contracted, the height of the optical lens 10 is reduced, which is beneficial to reduce the shoulder height of the optical lens 10, thereby facilitating the miniaturization of the optical lens 10.

[0412] Wherein, the maximum light passing diameter LD of the region of the object side surface 1c of the mirror group 1 through which the light passes and the maximum light passing diameter LRD of the region of the image side surface 1d of the mirror group 1 from which the light exits satisfy: LD / LRD=3.23. It can be understood that by limiting the ratio of the maximum light passing diameter LD of the region of the object side surface 1c of the mirror group 1 through which the light passes and the maximum light passing diameter LRD of the region of the image side surface 1d of the mirror group 1 from which the light exits to be equal to 3.23, the light reflected by the mirror group 1 is contracted, the height of the optical lens 10 is reduced, which is conducive to reducing the shoulder height of the optical lens 10, thereby facilitating the miniaturized arrangement of the optical lens 10.

[0413] Wherein, the height HP of the folding element 3, the image height I H of the optical lens 10, and the angle PA of the smallest acute angle inside the folding element 3 satisfy: HP-1.25xI Hxtan(PA)=3.36. It can be understood that by limiting HP-1.25xI Hxtan(PA) to be equal to 3.36, the folded optical path is facilitated, thereby reducing the volume of the optical lens 10, which is conducive to the miniaturized arrangement of the optical lens 10.

[0414] In other embodiments, the form of the smallest acute angle inside the folding element 3 is not limited to the sharp corner form shown in the figure, for example, the smallest acute angle inside the folding element 3 can be rounded or ground into a flat surface according to actual needs in the process. Specifically, the present application is not limited. Figure 18

[0415] Wherein, the maximum light passing diameter LD of the region of the object side surface 1c of the mirror group 1 through which the light passes and the maximum light passing diameter RD of the region of the first lens 21 through which the light passes satisfy: LD / RD=2.63. It can be understood that by limiting the ratio of the maximum light passing diameter LD of the region of the object side surface 1c of the mirror group 1 through which the light passes and the maximum light passing diameter RD of the region of the first lens 21 through which the light passes to be equal to 2.63, the light reflected by the mirror group 1 is contracted, the light is intercepted, and the off-axis aberration is corrected.

[0416] Wherein, the maximum reflection light diameter DOR of the region closest to the object side on the mirror group 1 where reflection occurs and the image height I H of the optical lens 10 satisfy: DOR / I H=1.76. It can be understood that by limiting the ratio of the maximum reflection light diameter DOR of the region closest to the object side on the mirror group 1 where reflection occurs and the image height I H of the optical lens 10 to be equal to 1.76, the on-axis light is reduced, the loss of light is reduced, and the imaging quality of the optical lens 10 is improved.

[0417] Figure 19 is a simulation effect diagram one of the telephoto end of the camera module 300 of the fifth embodiment.

[0418] As​Figure 19 As shown, when the camera module 300 is at the telephoto end, the normalized coordinates of the camera module 300 are all small, the axial chromatic aberration (spherical aberration, chromatic aberration, etc.) correction of the camera module 300 is good, and the imaging quality of the camera module 300 is high.

[0419] Figure 20 This is a simulation effect of the telephoto end of the camera module 300 in the fifth embodiment. Figure Two .

[0420] like Figure 20 As shown, when the camera module 300 is at the telephoto end, the field curvature in both directions is small, the camera module 300 has a good depth of focus, and the imaging quality of the camera module 300 is high.

[0421] Figure 21 This is a simulation effect of the telephoto end of the camera module 300 in the fifth embodiment. Figure Three .

[0422] like Figure 21 As shown, when the camera module 300 is at the telephoto end, the optical distortion ratio of the camera module 300 at different image heights is less than 2%, which can ensure that there is no obvious distortion in the image, the degree of optical distortion of the image is small, and the imaging quality of the camera module 300 is high.

[0423] Sixth implementation method: Please refer to Figure 22 , Figure 22 yes Figure 1B The simplified schematic diagram of part of the structure of the camera module 300 in another embodiment shown. Figure Five .

[0424] In this embodiment, the camera module 300 includes a mirror group 1, a lens group 2, a filter 30, and an image sensor 20 arranged sequentially from the object side to the image side.

[0425] For example, the mirror assembly 1 includes a first reflecting lens 11, and the exit surface 1b of the mirror assembly 1 may be located in the fourth sub-region 114 of the image side surface 11b of the first reflecting lens 11.

[0426] For example, after light enters the first reflecting lens 11, it undergoes a first reflection on the third sub-region 113 of the image side 11b of the first reflecting lens 11, a second reflection on the second sub-region 112 of the object side 11a of the first reflecting lens 11, and then exits the first reflecting lens 11 from the fourth sub-region 114 of the image side 11b of the first reflecting lens 11 and enters the lens group 2.

[0427] It can be understood that the second sub-area 112 of the object side surface 11a of the first reflecting lens 11 can be the closest object side reflecting surface of the mirror group 1. The second sub-area 112 of the object side surface 11a of the first reflecting lens 11 can be the second reflecting surface 1f of the mirror group 1. In other embodiments, when the mirror group 1 adopts other structures, other areas of the mirror group 1 can also be the second reflecting surface 1f of the mirror group 1.

[0428] It can be understood that the third sub-area 113 of the image side surface 11b of the first reflecting lens 11 can be the closest image side reflecting surface of the mirror group 1. The third sub-area 113 of the image side surface 11b of the first reflecting lens 11 can be the first reflecting surface 1e of the mirror group 1. In other embodiments, when the mirror group 1 adopts other structures, other areas of the mirror group 1 can also be the first reflecting surface 1e of the mirror group 1.

[0429] Exemplarily, the lens group 2 can include a first lens 21 and a light conversion element 24, and the first lens 21 can be located on the image side of the light conversion element 24. The light conversion element 24 includes an incident surface 241, an exit surface 242, and a reflecting surface 243, the incident surface 241 of the light conversion element 24 is connected to the exit surface 242 of the light conversion element 24, the reflecting surface 243 of the light conversion element 24 is connected to the incident surface 241 of the light conversion element 24 and the exit surface 242 of the light conversion element 24, and the exit surface 1b of the mirror group 1 can be arranged to face the incident surface 241 of the light conversion element 24, and the exit surface 242 of the light conversion element 24 can face the first lens 21.

[0430] Exemplarily, the light passing through the first reflecting lens 11 enters the light conversion element 24 through the incident surface 241 of the light conversion element 24, is reflected on the reflecting surface 243 of the light conversion element 24, and then is emitted from the exit surface 242 of the light conversion element 24 to the first lens 21, and the first direction can be different from the second direction.

[0431] It can be understood that the light conversion element 24 changes the optical axis from the first direction to the second direction, which can reduce the height of the optical lens 10 in the first direction, and is conducive to reducing the shoulder height of the optical lens 10, and is conducive to realizing the miniaturization of the optical lens 10.

[0432] It can be understood that the light conversion element 24 can cooperate with the mirror group 1 and the folding element 3 to further increase the total length of the light path, thereby further facilitating the realization of the long focal end shooting of the optical lens 10. In addition, since the light conversion element 24 increases the total length of the light path by reflection, the overall physical length and height of the optical lens 10 can be kept short, which is conducive to reducing the height of the optical lens 10, thereby realizing the miniaturization of the optical lens 10.

[0433] Exemplarily, the lens group 2 can further include a second lens 22 and a third lens 23, and the lens group 2 can include the light turning element 24, the first lens 21, the second lens 22, and the third lens 23 arranged in sequence from the object side to the image side.

[0434] Exemplarily, the auto-focusing of the camera module 300 is achieved by moving the image sensor 20, or the optical lens 10, or the first lens 21, the second lens 22, and the third lens 23 of the lens group 2, or the folding element 3, so as to improve the imaging quality of the camera module 300.

[0435] The partial design parameters of the camera module 300 of the sixth embodiment of the present application are shown in Table 16.

[0436] Table 16 Partial design parameters of various elements of the camera module 300 of the sixth embodiment

[0437]

[0438] It can be understood that in Table 16, OBJ can represent the object side of the optical lens 10; STO can represent a stop (not shown in the drawings); S1 can represent the first sub-region 111 of the object side 11a of the first reflective lens 11; S2 can represent the third sub-region 113 of the image side 11b of the first reflective lens 11; S3 can represent the second sub-region 112 of the image side 11b of the first reflective lens 11; S4 can represent the fourth sub-region 114 of the image side 11b of the first reflective lens 11; S5 can represent the incident surface 241 of the light turning element 24; S6 can represent the reflecting surface 243 of the light turning element 24; S7 can represent the emergent surface 242 of the light turning element 24; S8 and S9 can respectively represent the object side and the image side of the first lens 21; S10 and S11 can respectively represent the object side and the image side of the second lens 22; S12 and S13 can respectively represent the object side and the image side of the third lens 23; S14 and S15 can respectively represent the object side and the image side of the optical filter 30; and S16 can represent the imaging surface of the camera module.

[0439] In addition, the thickness of OBJ refers to the distance between the object and the object side of the optical lens 10. The thickness of S1 refers to the distance between the first sub-region 111 of the object side 11a of the first reflective lens 11 and the third sub-region 113 of the image side 11b of the first reflective lens 11. The thickness of S2 refers to the distance between the third sub-region 113 of the image side 11b of the first reflective lens 11 and the second sub-region 112 of the image side 11b of the first reflective lens 11. The thickness of S3 refers to the distance between the second sub-region 112 of the image side 11b of the first reflective lens 11 and the fourth sub-region 114 of the image side 11b of the first reflective lens 11. The thickness of S4 refers to the distance between the fourth sub-region 114 of the image side 11b of the first reflective lens 11 and the incident surface 241 of the light conversion element 24. The thickness of S5 refers to the distance between the incident surface 241 of the light conversion element 24 and the reflecting surface 243 of the light conversion element 24. The thickness of S6 refers to the distance between the reflecting surface 243 of the light conversion element 24 and the exit surface 242 of the light conversion element 24. The thickness of S7 refers to the distance between the exit surface 242 of the light conversion element 24 and the object side of the first lens 21. The thickness of S8 refers to the distance between the object side of the first lens 21 and the image side of the first lens 21. The thickness of S9 refers to the distance between the image side of the first lens 21 and the object side of the second lens 22. The thickness of S10 refers to the distance between the object side of the second lens 22 and the image side of the second lens 22. The thickness of S11 refers to the distance between the image side of the second lens 22 and the object side of the third lens 23. The thickness of S12 refers to the distance between the object side of the third lens 23 and the image side of the third lens 23. The thickness of S13 refers to the distance between the image side of the third lens 23 and the object side of the optical filter 30. The thickness of S14 refers to the distance between the object side of the optical filter 30 and the image side of the optical filter 30. The thickness of S15 refers to the distance between the image side of the optical filter 30 and the object side of the image sensor 20. S16 refers to the distance between the object side of the image sensor 20 and the imaging surface.

[0440] In the sixth embodiment, the optical lens 10 satisfies: FOV = 13.4°. It can be understood that by limiting the full field of view FOV of the optical lens 10 to be equal to 13.4°, the distortion and the aberration of the image edge are reduced or avoided, and the full field of view FOV of the optical lens 10 is smaller, the field of view of the optical lens 10 is smaller, and the optical magnification is larger, which can better meet the super-telephoto design of the optical lens 10.

[0441] In addition, the aspheric coefficients of each element of the camera module 300 of the sixth embodiment of the present application are as follows in Table 17.

[0442] Table 17 Aspheric coefficients of each element of the camera module 300 of the sixth embodiment

[0443] Surface 1 2 3 4 [A4] 8.375450676E-06 4.911007161E-05 4.646850884E-04 -2.352850863E-03 [A6] -1.222317715E-07 1.401198993E-08 -1.090053805E-05 -7.921711563E-05 [A8] -1.254249773E-09 2.031087311E-11 3.217553428E-07 -4.903105033E-05 A 10 ]]> 8.955099556E-12 -1.044931157E-12 -1.058444198E-08 1.943078890E-05 A 12 ]]> -4.172504580E-13 -7.962409759E-14 1.352239257E-10 -4.722373160E-06 A 14 ]]> / / / 6.039353035E-07 A 16 ]]> / / / -3.159226001E-08 Surface 7 8 9 10 [A4] 7.887848373E-03 3.630938483E-03 -1.247533719E-02 -1.299872314E-02 [A6] -1.562131879E-03 9.071213212E-04 3.989341914E-03 4.133927920E-03 [A8] 5.907775967E-04 2.713498078E-05 -8.322706281E-04 -8.542452531E-04 A 10 ]]> -1.085707423E-04 -1.880475563E-05 8.295180237E-05 9.387668683E-05 A 12 ]]> 8.896984095E-06 7.001534811E-07 -3.484262292E-06 -5.608804919E-06 A 14 ]]> -3.001365691E-07 9.501259862E-09 -2.493565421E-08 1.417189846E-07 A 16 ]]> / / / / Surface 11 12 [A4] -1.324389925E-02 -1.027003050E-02 [A6] 2.263467412E-03 7.300118898E-04 [A8] -3.220461804E-04 -7.513898774E-05 A 10 ]]> 2.718780127E-05 4.289037069E-06 A 12 ]]> -1.546650771E-06 -1.793260762E-07 A 14 ]]> 4.396832534E-08 1.368630750E-09 A 16 ]]> / /

[0444] It can be understood that, among the 12 aspheric surfaces of the camera module 300 shown in Table 16 and Table 17, all even-odd aspheric surface types z can be defined by, but not limited to, the following aspheric surface formula:

[0445]

[0446] wherein z(x, y) is the optical surface sag; k is the conic coefficient; c is the curvature radius; r is the radius height in the optical axis direction; r2=x2+y2; a i is the polynomial coefficient; r i is the normalized radial coordinate. By substituting the design parameters of the first reflective lens 11, the first lens 21, the second lens 22 and the third lens 23 of the optical lens 10 into the above aspheric surface formula, the surface types of the object side and the image side of the first reflective lens 11, the first lens 21, the second lens 22 and the third lens 23 of the camera module 300 of the sixth embodiment of the present application can be obtained.

[0447] According to the data in Table 16 and Table 17, part of the parameters of the camera module 300 of the sixth embodiment of the present application can be obtained as shown in Table 18.

[0448] Table 18 Part of the parameters of the camera module 300 of the sixth embodiment

[0449] RBL EFL LEL LH TTL CTR LD 12.74 30.00 4.30 9.80 24.60 4.30 14.00 LRD HP IH PA RD DOR 4.40 / 3.60 / 5.80 6.60

[0450] It can be understood that the setting ranges of the related optical parameters in the present embodiment can refer to the setting ranges of the related optical parameters in the first embodiment.

[0451] wherein the back focal length RBL of the mirror group 1 (i.e. the sum of the absolute values of the thickness of S7 to the thickness of S15 in Table 16) and the focal length EFL of the optical lens 10 satisfy: RBL / EFL=0.42. It can be understood that by limiting the ratio of the back focal length RBL of the mirror group 1 to the focal length EFL of the optical lens 10 to be equal to 0.42, it is ensured that the mirror group 1 has a space inside which light can be reflected at least twice, and the optical lens 10 has sufficient space to arrange the lens group 2, so that the optical lens 10 has a higher magnification, and the super-telephoto shooting performance of the optical lens 10 is better.

[0452] The distance LEL between the object side 1c of the mirror group 1 and the image side 1d of the mirror group 1 and the height LH of the camera module 300 satisfy: LEL / LH = 0.44. It can be understood that by limiting the ratio of the distance LEL between the object side 1c of the mirror group 1 and the image side 1d of the mirror group 1 and the height LH of the camera module 300 to be equal to 0.44, the height of the camera module 300 can be reduced, which is beneficial to reduce the shoulder height of the camera module 300, thereby facilitating the miniaturization of the camera module 300.

[0453] The distance LEL between the object side 1c of the mirror group 1 and the image side 1d of the mirror group 1 and the total system optical length TTL of the camera module 300 satisfy: LEL / TTL = 0.17. It can be understood that by limiting the ratio of the distance LEL between the object side 1c of the mirror group 1 and the image side 1d of the mirror group 1 and the total system optical length TTL of the camera module 300 to be equal to 0.17, the height of the optical lens 10 and the camera module 300 can be reduced, which is beneficial to reduce the shoulder height of the optical lens 10 and the camera module 300, thereby facilitating the miniaturization of the optical lens 10 and the camera module 300.

[0454] The thickness CTR of the mirror group 1 and the maximum light passing diameter LD of the region through which the light passes the object side 1c of the mirror group 1 satisfy: CTR / LD = 0.31. It can be understood that by limiting the ratio of the thickness CTR of the mirror group 1 and the maximum light passing diameter LD of the region through which the light passes the object side 1c of the mirror group 1 to be equal to 0.31, the light reflected by the mirror group 1 is contracted, the height of the optical lens 10 is reduced, which is beneficial to reduce the shoulder height of the optical lens 10, thereby facilitating the miniaturization of the optical lens 10.

[0455] The maximum light passing diameter LD of the region through which the light passes the object side 1c of the mirror group 1 and the maximum light passing diameter LRD of the region through which the light exits the image side 1d of the mirror group 1 satisfy: LD / LRD = 3.18. It can be understood that by limiting the ratio of the maximum light passing diameter LD of the region through which the light passes the object side 1c of the mirror group 1 and the maximum light passing diameter LRD of the region through which the light exits the image side 1d of the mirror group 1 to be equal to 3.18, the light reflected by the mirror group 1 is contracted, the height of the optical lens 10 is reduced, which is beneficial to reduce the shoulder height of the optical lens 10, thereby facilitating the miniaturization of the optical lens 10.

[0456] The maximum light passing diameter LD of the region of the object side surface 1c of the mirror set 1 through which the light passes and the maximum light passing diameter RD of the region of the first lens 21 through which the light passes satisfy: LD / RD = 2.41. It can be understood that by limiting the ratio of the maximum light passing diameter LD of the region of the object side surface 1c of the mirror set 1 through which the light passes and the maximum light passing diameter RD of the region of the first lens 21 through which the light passes to be equal to 2.41, the light reflected by the mirror set 1 is contracted, the light is intercepted, and the off-axis aberration is corrected.

[0457] The maximum reflected light diameter DOR of the region closest to the object side on the mirror set 1 on which the reflection occurs and the image height I H of the optical lens 10 satisfy: DOR / I H = 1.83. It can be understood that by limiting the ratio of the maximum reflected light diameter DOR of the region closest to the object side on the mirror set 1 on which the reflection occurs and the image height I H of the optical lens 10 to be equal to 1.83, the obstruction of the on-axis light is reduced, the loss of light is reduced, and the imaging quality of the optical lens 10 is improved.

[0458] Figure 23 is a simulation effect diagram of the telephoto end of the camera module 300 of the sixth implementation manner.

[0459] As shown in Figure 23 , when the camera module 300 is at the telephoto end, the normalized coordinates of the camera module 300 are all small, the along-axis chromatic aberration (spherical aberration, chromatic aberration, etc.) of the camera module 300 is well corrected, and the imaging quality of the camera module 300 is high.

[0460] Figure 24 is a simulation effect diagram of the telephoto end of the camera module 300 of the sixth implementation manner. Figure Two .

[0461] As shown in Figure 24 , when the camera module 300 is at the telephoto end, both of the two direction curvatures are small, the camera module 300 has a good depth of focus, and the imaging quality of the camera module 300 is high.

[0462] Figure 25 is a simulation effect diagram of the telephoto end of the camera module 300 of the sixth implementation manner. Figure Three .

[0463] As shown in Figure 25 , when the camera module 300 is at the telephoto end, the optical distortion ratios of the camera module 300 at different image heights are all less than 2.5%, which can ensure that the picture does not have obvious deformation, the degree of optical distortion of the image is small, and the imaging quality of the camera module 300 is high.

[0464] The seventh implementation manner: please refer to Figure 26 , Figure 26 isFigure 1B The camera module 300 shown in another embodiment is partially simplified Figure Six .

[0465] In the present embodiment, the camera module 300 comprises, in order from the object side to the image side, a mirror group 1, a lens group 2, a folding element 3, a filter 30, and an image sensor 20.

[0466] Exemplarily, the mirror group 1 comprises a first reflective lens 11 and a second reflective lens 12, and the exit surface 1b of the mirror group 1 is located at the eighth sub-region 124 of the image side surface 12b of the second reflective lens 12.

[0467] Exemplarily, after the light enters the first reflective lens 11, it exits the first reflective lens 11 through the transmission region of the third sub-region 113 and enters the second reflective lens 12 through the transmission region of the fifth sub-region 121, and after the first reflection on the reflection region of the seventh sub-region 123, it exits the second reflective lens 12 through the transmission region of the fifth sub-region 121 and enters the first reflective lens 11 through the transmission region of the third sub-region 113, and after the second reflection on the reflection region of the second sub-region 112, it exits the second reflective lens 12 through the eighth sub-region 124 of the image side surface 12b of the second reflective lens 12 and enters the lens group 2.

[0468] It can be understood that the second sub-region 112 of the object side surface 11a of the first reflective lens 11 can be the reflection surface closest to the object side of the mirror group 1, and the second sub-region 112 of the object side surface 11a of the first reflective lens 11 can be the second reflection surface 1f of the mirror group 1. In other embodiments, when the mirror group 1 adopts other structures, other regions of the mirror group 1 can also be the second reflection surface 1f of the mirror group 1.

[0469] It can be understood that the seventh sub-region 123 of the image side surface 12b of the second reflective lens 12 can be the reflection surface closest to the image side of the mirror group 1. The seventh sub-region 123 of the image side surface 12b of the second reflective lens 12 can be the first reflection surface 1e of the mirror group 1. In other embodiments, when the mirror group 1 adopts other structures, other regions of the mirror group 1 can also be the first reflection surface 1e of the mirror group 1.

[0470] In the embodiment, the light rays can be reflected once in the first reflective lens 11 and can be reflected once in the second reflective lens 12. The light rays can enter the inside of the first reflective lens 11 from the first sub-area 111 of the object side surface 11a of the first reflective lens 11, exit the first reflective lens 11 from the transmission area of the third sub-area 113, enter the inside of the second reflective lens 12 from the fifth sub-area 121 of the object side surface 12a of the second reflective lens 12, be reflected on the reflection area of the seventh sub-area 123, exit the second reflective lens 12 from the transmission area of the sixth sub-area 122, enter the inside of the first reflective lens 11 from the fourth sub-area 114 of the image side surface 11b of the first reflective lens 11, be reflected on the reflection area of the second sub-area 112, exit the first reflective lens 11 from the transmission area of the fourth sub-area 114, enter the inside of the second reflective lens 12 from the sixth sub-area 122 of the object side surface 12a of the second reflective lens 12, exit the second reflective lens 12 from the transmission area of the eighth sub-area 124, and enter the lens group 2.

[0471] Exemplarily, the lens group 2 includes two lenses. The optical lens 10 includes the first lens 21 and the second lens 22 arranged in sequence from the object side to the image side.

[0472] Exemplarily, the folding element 3 can include a first sub-folding element 3a and a second sub-folding element 3b, and the first sub-folding element 3a and the second sub-folding element 3b can be fixedly connected.

[0473] Exemplarily, the first sub-folding element 3a includes a first surface 31a, a second surface 32a, and a reflection surface 33a, the first surface 31a of the first sub-folding element 3a can be connected to the second surface 32a of the first sub-folding element 3a and the reflection surface 33a of the first sub-folding element 3a, the first surface 31a of the first sub-folding element 3a can be arranged to face the lens group 2, and the incident surface 33 of the folding element 3 can be located on the first surface 31a of the first sub-folding element 3a.

[0474] Exemplarily, the second sub-folding element 3b includes a first surface 31b, a second surface 32b, and a reflection surface 33b, the second surface 32b of the second sub-folding element 3b can be connected to the first surface 31b of the second sub-folding element 3b and the reflection surface 33b of the second sub-folding element 3b, the first surface 31b of the second sub-folding element 3b can be arranged to face the second surface 32a of the first sub-folding element 3a, and the exit surface 34 of the folding element 3 can be located on the second surface 32b of the second sub-folding element 3b.

[0475] After the light enters the folding element 3, the light is reflected on the second surface 32a of the first sub-folding element 3a, the reflective surface 33a of the first sub-folding element 3a, and the first surface 31a of the first sub-folding element 3a, and is emitted from the second surface 32a of the first sub-folding element 3a, enters the second sub-folding element 3b from the first surface 31b of the second sub-folding element 3b, and is reflected on the reflective surface 33b of the second sub-folding element 3b and the first surface 31b of the second sub-folding element 3b. In an embodiment, the light is reflected for the first time on the second surface 32a of the first sub-folding element 3a, for the second time on the reflective surface 33a of the first sub-folding element 3a, for the third time on the first surface 31a of the first sub-folding element 3a, is emitted from the second surface 32a of the first sub-folding element 3a, enters the second sub-folding element 3b from the first surface 31b of the second sub-folding element 3b, and is reflected for the fourth time on the reflective surface 33b of the second sub-folding element 3b and for the fifth time on the first surface 31b of the second sub-folding element 3b.

[0476] It can be understood that the light can be reflected multiple times on the first surface 31a of the first sub-folding element 3a, the second surface 32a of the first sub-folding element 3a, the reflective surface 33a of the first sub-folding element 3a, the first surface 31b of the second sub-folding element 3b, and the reflective surface 33b of the second sub-folding element 3b, and the folding element 3 can increase the total length of the optical path. The folding element 3 can cooperate with the mirror group 1, and the total length of the optical path is further increased, thereby further facilitating the shooting at the long focal end of the optical lens 10. In addition, since the folding element 3 increases the total length of the optical path by reflection, the physical length and height of the optical lens 10 as a whole can be kept short, and the system total length of the camera module 300 is not easily significantly increased, which is conducive to reducing the height of the optical lens 10, thereby realizing the miniaturization of the optical lens 10.

[0477] Exemplarily, the automatic focusing of the camera module 300 is realized by moving the image sensor 20, or the optical lens 10, or the first lens 21 and the second lens 22 of the lens group 2, or the folding element 3, thereby improving the imaging quality of the camera module 300.

[0478] The design parameters of the camera module 300 of the seventh embodiment of the present application are shown in Table 19.

[0479] Table 19 Partial design parameters of various elements of the camera module 300 of the seventh embodiment

[0480]

[0481]

[0482] It can be understood that, in Table 19, OBJ can represent the object side of the optical lens 10; STO can represent a stop (not shown in the drawings); S1 can represent the first sub-region 111 of the object side 11a of the first reflective lens 11; S2 can represent the third sub-region 113 of the image side 11b of the first reflective lens 11; S3 can represent the fifth sub-region 121 of the object side 12a of the second reflective lens 12; S4 can represent the seventh sub-region 123 of the image side 12b of the second reflective lens 12; S5 can represent the fifth sub-region 121 of the object side 12a of the second reflective lens 12; S6 can represent the third sub-region 113 of the image side 11b of the first reflective lens 11; S7 can represent the second sub-region 112 of the image side 11b of the first reflective lens 11; S8 can represent the fourth sub-region 114 of the image side 11b of the first reflective lens 11; S9 can represent the sixth sub-region 122 of the object side 12a of the second reflective lens 12; S10 can represent the eighth sub-region 124 of the image side 12b of the second reflective lens 12; S11 and S12 can represent the object side and the image side of the first lens 21, respectively; S13 and S14 can represent the object side and the image side of the second lens 22, respectively; S15 can represent the first face 31a of the first sub-folding element 3a; S16 can represent the second face 32a of the first sub-folding element 3a; S17 can represent the reflective face 33a of the first sub-folding element 3a; S18 can represent the first face 31a of the first sub-folding element 3a; S19 can represent the second face 32a of the first sub-folding element 3a; S20 can represent the first face 31b of the second sub-folding element 3b; S21 can represent the reflective face 33b of the second sub-folding element 3b; S22 can represent the first face 31b of the second sub-folding element 3b; S23 can represent the second face 32b of the second sub-folding element 3b; S24 and S25 can represent the object side and the image side of the optical filter 30, respectively; and S26 can represent the imaging face of the camera module.

[0483] In addition, the thickness of the OBJ refers to the distance between the photographic subject and the object side surface of the optical lens 10. The thickness of the STO refers to the distance between the object side surface and the image side surface of the diaphragm. The thickness of the S1 refers to the distance between the first sub-region 111 of the object side surface 11a of the first reflective lens 11 and the third sub-region 113 of the image side surface 11b of the first reflective lens 11. The thickness of the S2 refers to the distance between the third sub-region 113 of the image side surface 11b of the first reflective lens 11 and the fifth sub-region 121 of the object side surface 12a of the second reflective lens 12. The thickness of the S3 refers to the distance between the fifth sub-region 121 of the object side surface 12a of the second reflective lens 12 and the seventh sub-region 123 of the image side surface 12b of the second reflective lens 12. The thickness of the S4 refers to the distance between the seventh sub-region 123 of the image side surface 12b of the second reflective lens 12 and the fifth sub-region 121 of the object side surface 12a of the second reflective lens 12. The thickness of the S5 refers to the distance between the fifth sub-region 121 of the object side surface 12a of the second reflective lens 12 and the fourth sub-region 114 of the image side surface 11b of the first reflective lens 11. The thickness of the S6 refers to the distance between the fourth sub-region 114 of the image side surface 11b of the first reflective lens 11 and the second sub-region 112 of the image side surface 11b of the first reflective lens 11. The thickness of the S7 refers to the distance between the second sub-region 112 of the image side surface 11b of the first reflective lens 11 and the fourth sub-region 114 of the image side surface 11b of the first reflective lens 11. The thickness of the S8 refers to the distance between the fourth sub-region 114 of the image side surface 11b of the first reflective lens 11 and the sixth sub-region 122 of the object side surface 12a of the second reflective lens 12. The thickness of the S9 refers to the distance between the sixth sub-region 122 of the object side surface 12a of the second reflective lens 12 and the eighth sub-region 124 of the image side surface 12b of the second reflective lens 12. The thickness of the S10 refers to the distance between the eighth sub-region 124 of the image side surface 12b of the second reflective lens 12 and the object side surface of the first lens 21. The thickness of the S11 refers to the distance between the object side surface of the first lens 21 and the image side surface of the first lens 21. The thickness of the S12 refers to the distance between the image side surface of the first lens 21 and the object side surface of the second lens 22. The thickness of the S13 refers to the distance between the object side surface of the second lens 22 and the image side surface of the second lens 22. The thickness of the S14 refers to the distance between the image side surface of the second lens 22 and the first surface 31a of the first sub-folding element 3a. The thickness of the S15 refers to the distance between the first surface 31a of the first sub-folding element 3a and the second surface 32a of the first sub-folding element 3a. The thickness of the S16 refers to the distance between the second surface 32a of the first sub-folding element 3a and the reflective surface 33a of the first sub-folding element 3a. The thickness of the S17 refers to the distance between the reflective surface 33a of the first sub-folding element 3a and the first surface 31a of the first sub-folding element 3a. The thickness of the S18 refers to the distance between the first surface 31a of the first sub-folding element 3a and the second surface 32a of the first sub-folding element 3a.The thickness of S19 refers to the distance between the second surface 32a of the first sub-folding element 3a and the first surface 31b of the second sub-folding element 3b. The thickness of S20 refers to the distance between the first surface 31b of the second sub-folding element 3b and the reflective surface 33b of the second sub-folding element 3b. The thickness of S21 refers to the distance between the reflective surface 33b of the second sub-folding element 3b and the first surface 31b of the second sub-folding element 3b. The thickness of S22 refers to the distance between the first surface 31b of the second sub-folding element 3b and the second surface 32b of the second sub-folding element 3b. The thickness of S23 refers to the distance between the second surface 32b of the second sub-folding element 3b and the object-side surface of the optical filter 30. The thickness of S24 refers to the distance between the object-side surface of the optical filter 30 and the image-side surface of the optical filter 30. The thickness of S25 refers to the distance between the image-side surface of the optical filter 30 and the object-side surface of the image sensor 20. S26 refers to the distance between the object-side surface of the image sensor 20 and the imaging surface.

[0484] In the optical lens 10, the FOV=9.5°. It can be understood that by limiting the full field of view FOV of the optical lens 10 to be equal to 9.5°, the distortion and the aberration of the image edge are reduced or avoided, and the full field of view FOV of the optical lens 10 is smaller, the field of view of the optical lens 10 is smaller, and the optical magnification is larger, which can better meet the ultra-long focal design of the optical lens 10.

[0485] In the optical lens 10, the Vd=42.7. It can be understood that the Abbe number of the folding element 3 is larger, which can reduce the dispersion and the chromatic aberration in the optical lens 10, better correct the dispersion and the chromatic aberration, and the resolution of the optical lens 10 is higher, and the imaging quality is clearer.

[0486] In addition, the aspheric surface coefficients of each element of the camera module 300 of the seventh embodiment of the present application are as shown in Table 20.

[0487] Table 20 Aspheric surface coefficients of each element of the camera module 300 of the seventh embodiment

[0488]

[0489]

[0490] It can be understood that among the 14 aspheric surfaces of the camera module 300 shown in Table 19 and Table 20, all the even and odd aspheric surface types z can be defined by, but not limited to, the following aspheric surface formula:

[0491]

[0492] wherein z(x, y) is the optical surface sag; k is the conic constant; c is the curvature radius; r is the radius height in the optical axis direction; r 2 = x 2 +y 2 ; a i is the polynomial coefficient; r i is the normalized radial coordinate. The design parameters of the first reflective lens 11, the second reflective lens 12, the first lens 21 and the second lens 22 of the optical lens 10 are substituted into the above-mentioned aspherical surface formula, and the surface shapes of the object side and the image side of the first reflective lens 11, the second reflective lens 12, the first lens 21 and the second lens 22 of the camera module 300 of the seventh embodiment of the present application can be obtained.

[0493] According to the data in Table 19 and Table 20, the partial parameters of the camera module 300 of the seventh embodiment of the present application can be obtained as shown in Table 21.

[0494] Table 21 Partial parameters of the camera module 300 of the seventh embodiment

[0495] RBL EFL LEL LH TTL CTR LD 22.30 38.00 6.25 12.60 34.50 4.80 15.00 LRD HP IH PA RD DOR 5.20 5.10 3.20 45.00 5.00 6.80

[0496] It can be understood that the setting ranges of the related optical parameters in the present embodiment can refer to the setting ranges of the related optical parameters in the first embodiment.

[0497] wherein the back focal length RBL of the mirror group 1 (i.e. the sum of the absolute value of the thickness of S10 to the absolute value of the thickness of S25 in Table 19) and the focal length EFL of the optical lens 10 satisfy: RBL / EFL = 0.59. It can be understood that by limiting the ratio of the back focal length RBL of the mirror group 1 to the focal length EFL of the optical lens 10 to be equal to 0.59, it is ensured that the mirror group 1 has a space inside which the light can be reflected at least twice, and the optical lens 10 has sufficient space to arrange the lens group 2, so that the optical lens 10 has a higher magnification, and the super-telephoto shooting performance of the optical lens 10 is better.

[0498] wherein the distance LEL between the object side 1c of the mirror group 1 and the image side of the last lens of the lens group 2 arranged at least partially along the first direction and the height LH of the camera module 300 satisfy: LEL / LH = 0.50. It can be understood that by limiting the ratio of the distance LEL between the object side 1c of the mirror group 1 and the image side of the last lens of the lens group 2 arranged at least partially along the first direction to the height LH of the camera module 300 to be equal to 0.50, the height of the camera module 300 can be reduced, which is beneficial to reduce the shoulder height of the camera module 300, thereby facilitating the miniaturization of the camera module 300.

[0499] The distance LEL between the object side 1c of the mirror group 1 and the image side of the last lens of the lens group 2 arranged along the first direction and the total length of the system TTL of the camera module 300 satisfy: LEL / TTL = 0.18. It can be understood that by limiting the ratio of the distance LEL between the object side 1c of the mirror group 1 and the image side of the last lens of the lens group 2 arranged along the first direction and the total length of the system TTL of the camera module 300 to be equal to 0.18, the height of the optical lens 10 and the camera module 300 is reduced, which is conducive to reducing the shoulder height of the optical lens 10 and the camera module 300, thereby facilitating the miniaturization of the optical lens 10 and the camera module 300.

[0500] The thickness CTR of the mirror group 1 and the maximum diameter LD of the light passing through the region of the object side 1c of the mirror group 1 satisfy: CTR / LD = 0.32. It can be understood that by limiting the ratio of the thickness CTR of the mirror group 1 and the maximum diameter LD of the light passing through the region of the object side 1c of the mirror group 1 to be equal to 0.32, the light reflected by the mirror group 1 is contracted, the height of the optical lens 10 is reduced, which is conducive to reducing the shoulder height of the optical lens 10, thereby facilitating the miniaturization of the optical lens 10.

[0501] The maximum diameter LD of the light passing through the region of the object side 1c of the mirror group 1 and the maximum diameter LRD of the light exiting the region of the image side 1d of the mirror group 1 satisfy: LD / LRD = 2.88. It can be understood that by limiting the ratio of the maximum diameter LD of the light passing through the region of the object side 1c of the mirror group 1 and the maximum diameter LRD of the light exiting the region of the image side 1d of the mirror group 1 to be equal to 2.88, the light reflected by the mirror group 1 is contracted, the height of the optical lens 10 is reduced, which is conducive to reducing the shoulder height of the optical lens 10, thereby facilitating the miniaturization of the optical lens 10.

[0502] The height HP of the folding element 3, the image height IH of the optical lens 10, and the angle PA of the smallest acute angle inside the folding element 3 satisfy: HP-1.25xIHxtan(PA) = 0.94. It can be understood that by limiting HP-1.25xIHxtan(PA) to be equal to 0.94, the folded light path is conducive, thereby reducing the volume of the optical lens 10, which is conducive to the miniaturization of the optical lens 10.

[0503] In other embodiments, the form of the smallest acute angle inside the folding element 3 is not limited to the form of the sharp corner shown in the figure, for example, the smallest acute angle inside the folding element 3 can be rounded or ground into a flat surface according to actual needs in the process. Specifically, the present application is not limited. Figure 26 The form of the smallest acute angle inside the folding element 3 is not limited to the form of the sharp corner shown in the figure, for example, the smallest acute angle inside the folding element 3 can be rounded or ground into a flat surface according to actual needs in the process. Specifically, the present application is not limited.

[0504] Wherein, the maximum light passing diameter LD of the region of the object side surface 1c of the mirror group 1 through which the light passes and the maximum light passing diameter RD of the region of the first lens 21 through which the light passes satisfy: LD / RD = 3.00. It can be understood that by limiting the ratio of the maximum light passing diameter LD of the region of the object side surface 1c of the mirror group 1 through which the light passes and the maximum light passing diameter RD of the region of the first lens 21 through which the light passes to be equal to 3.00, the light reflected by the mirror group 1 is contracted, the light is intercepted, and the off-axis aberration is corrected.

[0505] Wherein, the maximum reflected light diameter DOR of the region closest to the object side on the mirror group 1 on which the reflection occurs and the image height I H of the optical lens 10 satisfy: DOR / I H = 2.13. It can be understood that by limiting the ratio of the maximum reflected light diameter DOR of the region closest to the object side on the mirror group 1 on which the reflection occurs and the image height I H of the optical lens 10 to be equal to 2.13, the obstruction of the on-axis light is reduced, the loss of light is reduced, and thus the imaging quality of the optical lens 10 is improved.

[0506] Figure 27 is a simulation effect diagram of the telephoto end of the camera module 300 of the seventh implementation.

[0507] As shown in Figure 27 , when the camera module 300 is at the telephoto end, the normalized coordinates of the camera module 300 are all small, the along-axis chromatic aberration (spherical aberration, chromatic aberration, etc.) of the camera module 300 is well corrected, and the imaging quality of the camera module 300 is high.

[0508] Figure 28 is a simulation effect diagram of the telephoto end of the camera module 300 of the seventh implementation. Figure Two .

[0509] As shown in Figure 28 , when the camera module 300 is at the telephoto end, both of the two direction field curvatures are small, the camera module 300 has good depth of focus, and the imaging quality of the camera module 300 is high.

[0510] Figure 29 is a simulation effect diagram of the telephoto end of the camera module 300 of the seventh implementation. Figure Three .

[0511] As shown in Figure 29 , when the camera module 300 is at the telephoto end, the optical distortion ratios of the camera module 300 at different image heights are all less than 0.5%, which can ensure that the picture has no obvious deformation, the degree of optical distortion of the image is small, and the imaging quality of the camera module 300 is high.

[0512] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict, and any combination of features in different embodiments is within the protection scope of the present application, that is, the above-described multiple embodiments can also be combined as needed.

[0513] It should be noted that all the above-mentioned drawings are exemplary drawings of the present application, and do not represent the actual size of the product. The size ratio relationship between the components in the drawings is not limited to the actual product of the present application. The above are only part of the embodiments and implementation manners of the present application, and the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An optical lens (10), characterized in that, The optical lens (10) comprises, arranged in order from the object side to the image side, a mirror group (1), a lens group (2) and a folding element (3); The mirror group (1) comprises an incident surface (1a) and an exit surface (1b), the exit surface (1b) of the mirror group (1) is arranged to face the lens group (2), light rays enter the inside of the mirror group (1) from the incident surface (1a) of the mirror group (1), after at least two reflections in the inside of the mirror group (1), the light rays are emitted from the exit surface (1b) of the mirror group (1) and enter the lens group (2); The folding element (3) comprises an incident surface (33) and an exit surface (34), the incident surface (33) of the folding element (3) is arranged to face the lens group (2), after passing through the lens group (2), light rays enter the inside of the folding element (3) from the incident surface (33) of the folding element (3), after at least one reflection in the inside of the folding element (3), the light rays are emitted from the exit surface (34) of the folding element (3).

2. The optical lens (10) according to claim 1, characterized in that, The optical lens (10) satisfies: 0.2 < RBL / EFL < 1.1, wherein RBL is the back focal length of the mirror group (1), and EFL is the focal length of the optical lens (10).

3. The optical lens (10) according to claim 1 or 2, characterized in that, The optical lens (10) satisfies: FOV < 50°, wherein FOV is the full field of view of the optical lens (10).

4. The optical lens (10) according to any one of claims 1 to 3, characterized in that, The optical lens (10) satisfies: LD / LRD > 1.5, wherein LD is the maximum light passing diameter of the area through which the light passes the object side surface (1c) of the mirror group (1), and LRD is the maximum light passing diameter of the area through which the light is emitted from the image side surface (1d) of the mirror group (1).

5. The optical lens (10) according to any one of claims 1 to 4, characterized in that, The lens group (2) comprises a first lens (21), and the first lens (21) is located on the image side of the mirror group (1). The optical lens (10) satisfies: LD / RD > 1.1, wherein RD is the maximum light passing diameter of the area through which the light passes the first lens (21).

6. The optical lens (10) according to any one of claims 1 to 5, characterized in that, The optical lens (10) satisfies: CTR / LD < 0.7, wherein CTR is the thickness of the mirror group (1).

7. The optical lens (10) according to any one of claims 1 to 6, characterized in that, The optical lens (10) satisfies: 0.6 < DOR / IH < 5, wherein DOR is the maximum reflected light diameter of the area closest to the object side where reflection occurs in the mirror group (1), and IH is the image height of the optical lens (10).

8. The optical lens (10) according to any one of claims 1 to 7, characterized in that, The folding element (3) satisfies: -1 < HP-1.25 x IH x tan(PA) < 5, wherein HP is the height of the folding element (3) in the height direction of the optical lens (10), and PA is the angle of the smallest acute angle inside the folding element (3).

9. The optical lens (10) according to any one of claims 1 to 8, characterized in that, The folding element (3) satisfies: Vd > 15, wherein Vd is the Abbe number of the folding element (3).

10. The optical lens (10) according to any one of claims 1 to 9, characterized in that, The incident surface (1a) of the mirror group (1) is located on the object side surface (1c) of the mirror group (1), and the exit surface (1b) of the mirror group (1) is located on the image side surface (1d) of the mirror group (1). The first reflection of the light ray in the mirror group (1) is on the image side of the second reflection of the light ray in the mirror group (1).

11. The optical lens (10) according to claim 10, characterized in that, The mirror group (1) comprises a first reflection surface (1e), which is the area closest to the image side on the mirror group (1) where reflection occurs. The first reflection surface (1e) of the mirror group (1) is curved towards the object side.

12. The optical lens (10) according to claim 10, characterized in that, The mirror group (1) comprises a second reflection surface (1f), which is the area closest to the object side on the mirror group (1) where reflection occurs. The second reflection surface (1f) of the mirror group (1) is curved towards the object side.

13. The optical lens (10) according to any one of claims 1 to 12, characterized in that, The folding element (3) comprises a top surface (31) and a bottom surface (32) arranged back-to-back, the top surface (31) of the folding element (3) faces the exit surface (1b) of the mirror group (1), and the entrance surface (33) and the exit surface (34) of the folding element (3) are both located on the top surface (31) of the folding element (3). The folding element (3) further comprises a first reflection surface (35) and a second reflection surface (36), the first reflection surface (35) and the second reflection surface (36) of the folding element (3) connect the top surface (31) and the bottom surface (32) of the folding element (3). After the light ray enters the folding element (3), reflection occurs on the first reflection surface (35), the top surface (31), and the second reflection surface (36) of the folding element (3).

14. The optical lens (10) according to any one of claims 1 to 12, characterized in that, The folding element (3) comprises a top surface (31) and a bottom surface (32) arranged back-to-back, the entrance surface (33) and the exit surface (34) of the folding element (3) are both located on the top surface (31) of the folding element (3). The folding element (3) further comprises a first reflection surface (35) and a second reflection surface (36), the first reflection surface (35) and the second reflection surface (36) connect the top surface (31) and the bottom surface (32) of the folding element (3). After the light ray enters the folding element (3), reflection occurs on the first reflection surface (35), the top surface (31), the bottom surface (32), and the second reflection surface (36) of the folding element (3).

15. The optical lens (10) according to any one of claims 1 to 12, characterized in that, The folding element (3) comprises a first surface (37), a second surface (38) and a reflecting surface (39), the first surface (37) of the folding element (3) is connected to the second surface (38) of the folding element (3), and the reflecting surface (39) of the folding element (3) is connected to the first surface (37) of the folding element (3) and the second surface (38) of the folding element (3), the first surface (37) of the folding element (3) faces the lens group (2), the incident surface (33) of the folding element (3) is located on the first surface (37) of the folding element (3), and the exit surface (34) of the folding element (3) is located on the second surface (38) of the folding element (3). After the light enters the folding element (3), the light is reflected on the second surface (38) of the folding element (3) and the reflecting surface (39) of the folding element (3).

16. The optical lens (10) according to any one of claims 1 to 12, characterized in that, The folding element (3) comprises a first sub-folding element (3a) and a second sub-folding element (3b), and the first sub-folding element (3a) is fixedly connected to the second sub-folding element (3b). The first sub-folding element (3a) comprises a first surface (31a), a second surface (32a) and a reflecting surface (33a), the first surface (31a) of the first sub-folding element (3a) is connected to the second surface (32a) of the first sub-folding element (3a) and the reflecting surface (33a) of the first sub-folding element (3a), the first surface (31a) of the first sub-folding element (3a) faces the lens group (2), and the incident surface (33) of the folding element (3) is located on the first surface (31a) of the first sub-folding element (3a). The second sub-folding element (3b) comprises a first surface (31b), a second surface (32b) and a reflecting surface (33b), the second surface (32b) of the second sub-folding element (3b) is connected to the first surface (31b) of the second sub-folding element (3b) and the reflecting surface (33b) of the second sub-folding element (3b), the first surface (31b) of the second sub-folding element (3b) faces the second surface (32a) of the first sub-folding element (3a), and the exit surface (34) of the folding element (3) is located on the second surface (32b) of the second sub-folding element (3b). After the light enters the first sub-folding element (3a), the light is reflected on the second surface (32a) of the first sub-folding element (3a), the reflecting surface (33a) of the first sub-folding element (3a) and the first surface (31a) of the first sub-folding element (3a), and then the light is emitted from the second surface (32a) of the first sub-folding element (3a) and enters the second sub-folding element (3b) through the first surface (31b) of the second sub-folding element (3b), and the light is reflected on the reflecting surface (33b) of the second sub-folding element (3b) and the first surface (31b) of the second sub-folding element (3b).

17. The optical lens (10) according to any one of claims 1 to 16, characterized in that, The lens group (2) comprises a light transfer element (24) and one or more lenses, the one or more lenses are located on the image side of the light transfer element (24), and the light transfer element (24) is used to change the optical axis of the first direction to the second direction, and the first direction is different from the second direction; The light transfer element (24) comprises an incident surface (241), an exit surface (242) and a reflection surface (243), the incident surface (241) of the light transfer element (24) is connected to the exit surface (242) of the light transfer element (24), the reflection surface (243) of the light transfer element (24) is connected to the incident surface (241) of the light transfer element (24) and the exit surface (242) of the light transfer element (24), the incident surface (241) of the light transfer element (24) is arranged to face the exit surface (1b) of the mirror group (1), and the exit surface (242) of the light transfer element (24) is arranged to face the one or more lenses; The light reflected by the mirror group (1) enters the inside of the light transfer element (24) from the incident surface (241) of the light transfer element (24), is reflected on the reflection surface (243) of the light transfer element (24), is emitted from the exit surface (242) of the light transfer element (24) and enters the one or more lenses.

18. An optical lens (10) characterized in that, The mirror group (1) and the lens group (2) are arranged in sequence from the object side to the image side, and the lens group (2) comprises a first lens (21) and a light transfer element (24), and the first lens (21) is located on the image side of the light transfer element (24); The mirror group (1) comprises an incident surface (1a) and an exit surface (1b), the light transfer element (24) comprises an incident surface (241), an exit surface (242) and a reflection surface (243), the incident surface (241) of the light transfer element (24) is connected to the exit surface (242) of the light transfer element (24), the reflection surface (243) of the light transfer element (24) is connected to the incident surface (241) of the light transfer element (24) and the exit surface (242) of the light transfer element (24), and the exit surface (1b) of the mirror group (1) is arranged to face the incident surface (241) of the light transfer element (24); The light enters the inside of the mirror group (1) from the incident surface (1a) of the mirror group (1), is reflected at least twice in the inside of the mirror group (1), is emitted from the exit surface (1b) of the mirror group (1) and enters the light transfer element (24), is reflected on the reflection surface (243) of the light transfer element (24), is changed from the first direction to the second direction, is emitted from the exit surface (242) of the light transfer element (24) and enters the first lens (21), and the first direction intersects the second direction.

19. The optical lens (10) according to claim 18, characterized in that, The optical lens (10) satisfies: 0.2 < RBL / EFL < 1.1, wherein RBL is a back focal length of the mirror group (1), and EFL is a focal length of the optical lens (10).

20. The optical lens (10) according to claim 18 or 19, characterized in that, The optical lens (10) satisfies: FOV ≤ 50°, wherein FOV is a full field of view angle of the optical lens (10).

21. The optical lens (10) according to any one of claims 18 to 20, characterized in that, The optical lens (10) satisfies: LD / RD > 1.1, wherein LD is a maximum light passing diameter of an area through which light passes the object side surface (1c) of the mirror group (1), and RD is a maximum light passing diameter of an area through which light passes the first lens (21).

22. The optical lens (10) according to any one of claims 18 to 21, wherein, The optical lens (10) satisfies: LD / LRD > 1.5, wherein LRD is a maximum light passing diameter of an area through which light exits the image side surface (1d) of the mirror group (1).

23. The optical lens (10) according to any one of claims 18 to 22, characterized in that, The optical lens (10) satisfies: CTR / LD < 0.7, wherein CTR is a thickness of the mirror group (1).

24. The optical lens (10) according to any one of claims 18 to 23, characterized in that, The optical lens (10) satisfies: 0.6 < DOR / IH < 5, wherein DOR is a maximum reflection light diameter of an area closest to the object side in which light is reflected on the mirror group (1), and IH is an image height of the optical lens (10).

25. The optical lens (10) according to any one of claims 18 to 24, characterized in that, An incident surface (1a) of the mirror group (1) is located on the object side surface (1c) of the mirror group (1), and an exit surface (1b) of the mirror group (1) is located on the image side surface (1d) of the mirror group (1). After entering the mirror group (1), a first reflection of the light in the mirror group (1) is located on the image side of a second reflection of the light in the mirror group (1).

26. A camera module (300) comprising: An image sensor (20) and the optical lens (10) as claimed in any one of claims 1 to 25 are included, and the image sensor (20) is located on the image side of the optical lens (10).

27. The camera module (300) according to claim 26, characterized in that, The camera module (300) satisfies: LEL / TTL < 0.6, wherein TTL is a total system optical length of the camera module (300).

28. The optical lens (10) according to claim 26 or 27, characterized in that, The camera module (300) satisfies: 0.2 < LEL / LH < 0.9, wherein LEL is a distance between the object side surface (1c) of the mirror group (1) and an image side surface of a last lens of the lens group (2) arranged in a first direction when at least part of the lens group (2) is arranged in the first direction, or LEL is a distance between the object side surface (1c) of the mirror group (1) and the image side surface (1d) of the mirror group (1) when the lens group (2) is arranged in a second direction, LEL is a distance between the object side surface (1c) of the mirror group (1) and an image side surface of a last lens of the lens group (2) arranged in a first direction when at least part of the lens group (2) is arranged in the first direction, or LEL is a distance between the object side surface (1c) of the mirror group (1) and the image side surface (1d) of the mirror group (1) when the lens group (2) is arranged in a second direction, LEL is a distance between the object side surface (1c) of the mirror group (1) and an image side surface of a last lens of the lens group (2) arranged in a first direction when at least part of the lens group (2) is arranged in the first direction, or LEL is a distance between the object side surface (1c) of the mirror group (1) and the image side surface (1d) of the mirror group (1) when the lens group (2) is arranged in a second direction, LEL is a distance between the object side surface (1c) of the mirror group (1) and an image side surface of a last lens of the lens group (2) arranged in a first direction when at least part of the lens group (2) is arranged in the first direction, or LEL is a distance between the object side surface (1c) of the mirror group (1) and the image side surface (1d) of the mirror group (1) when the lens group (2) is arranged in a second direction, LEL is a distance between the object side surface (1c) of the mirror group (1) and an image side surface of a last lens of the lens group (2) arranged in a first direction when at least part of the lens group (2) is arranged in the first direction, or LEL is a distance between the object side surface (1c) of the mirror group (1) and the image side surface (1d) of the mirror group (1) when the lens group (2) is arranged in a second direction, LEL is a distance between the object side surface (1c) of the mirror group (1) and an image side surface of a last lens of the lens group (2) arranged in a first direction when at least part of the lens group (2) is arranged in the first direction, or LEL is a distance between the object side surface (1c) of the mirror group (1) and the image side surface (1d) of the mirror group (1) when the lens group (2) is arranged in a second direction, LEL is a distance between the object side surface (1c) of the mirror group (1) and an image side surface of a last lens of the lens group (2) arranged in a first direction when at least part of the lens group (2) is arranged in the first direction, or LEL is a distance between the object side surface (1c) of the mirror group (1) and the image side surface (1d) of the mirror group (1) when the lens group (2) is arranged in a second direction, LEL is a distance between the object side surface (1c) of the mirror group (1) and an image side surface of a last lens of the lens group (2) arranged in a first direction when at least part of the lens group (2) is arranged in the first direction, or LEL is a distance between the object side surface (1c) of the mirror group (1) and the image side surface (1d) of the mirror group (1) when the lens group (2) is arranged in a second direction, LEL is a distance between the object side surface (1c) of the mirror group (1) and an image side surface of a last lens of the lens group (2) arranged in a first direction when at least part of the lens group (2) is arranged in the first direction, or LEL is a distance between the object side surface (1c) of the mirror group (1) and the image side surface (1d) of the mirror group (1) when the lens group (2) is arranged in a second direction, LEL is a distance between the object side surface (1c) of the mirror group (1) and an image side surface of a last lens of the lens group (2) arranged in a first direction when at least part of the lens group (2) is arranged in the first direction, or LEL is a distance between the object side surface (1c) of the mirror group (1) and the image side surface (1d) of the mirror group (1) when the lens group (2) is arranged in a second direction, LEL is a distance between the object side surface (1c) of the mirror group (1) and an image side surface of a last lens of the lens group (2) arranged in a first direction when at least part of the lens group (2) is arranged in the first direction, or LEL is a distance between the object side surface (1c) of the mirror group (1) and the image side surface (1d) of the mirror group (1) when the lens group (2) is arranged in a second direction, LEL is a distance between the object side surface (1c) of the mirror group (1) and an image side surface of a last lens of the lens group (2) arranged in a first direction when at least part of the lens group (2) is arranged in the first direction, or LEL is a distance between the object side surface (1c) of the mirror group (1) and the image side surface (1d) of the mirror group (1) when the lens group (2) is arranged in a second direction, LEL is a distance between the object side surface (1c) of the mirror group (1) and an image side surface of a last lens of the lens group (2) arranged in a first direction when at least part of the lens group (2) is arranged in the first direction, or LEL is a distance between the object side surface (1c) of the mirror group (1) and the image side surface (1d) of the mirror group (1) when the lens group (2) is arranged in a second direction, LEL is a distance between the object side surface (1c) of the mirror group (1) and an image side surface of a last lens of the lens group (2) arranged in a first direction when at least part of the lens group (2) is arranged in the first direction, or LEL is a distance between the object side surface (1c) of the mirror group (1) and the image side surface 29. An electronic device (1000), characterized by ​

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