Optical lens, camera module and electronic device

Abstract

The present application relates to the field of optical lenses, in particular to an optical lens, a camera module and an electronic device. The optical lens comprises a first lens group, a second lens group and a third lens group, which are sequentially arranged from an object side to an image side, wherein the effective aperture diameter DSn of at least one lens present in the second lens group and the entrance pupil diameter (EPD) of the optical lens satisfy 2.5>DSn / EPD>1.1, a first lens close to the object side in the first lens group has a negative focal power, and the Abbe number Vd1 of the first lens satisfies Vd1>40. On the basis of this solution, aberration can be greatly reduced, thus facilitating the improvement of imaging quality.

Description

Optical lens, camera module and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on October 9, 2023, with application number 202311303986.5 and application name “An optical lens, camera module and electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of optical lenses, and in particular to an optical lens, a camera module and an electronic device. Background Art

[0003] In recent years, with the advancement of terminal device technology, photography has become a must-have feature in many smart devices (such as smartphones), and the lens that enables this function has become an essential component in these devices. With the increasing demand for photography in smart devices, improving image quality through lens design is a technical challenge that needs to be addressed.

[0004] Summary of the Invention

[0005] To improve imaging quality, embodiments of the present application provide an optical lens, a camera module, and an electronic device.

[0006] In a first aspect, an embodiment of the present application provides an optical lens, which includes a first lens group, a second lens group, and a third lens group arranged in sequence from the object side to the image side; the effective aperture DSn of at least one lens in the second lens group satisfies 2.5>DSn / EPD>1.1 with the entrance pupil diameter EPD of the optical lens; the first lens close to the object side in the first lens group has a negative optical focal length, and the Abbe number Vd1 of the first lens satisfies Vd1>40.

[0007] It can be understood that the lenses of the second lens group play a core converging role in the process of light propagation. In the present application, the effective aperture DSn of at least one lens in the second lens group and the entrance pupil diameter EPD of the optical lens satisfy the large range of 2.5>DSn / EPD>1.1. That is, the at least one lens effectively reduces the incident angle of light, improves the converging effect, and effectively reduces astigmatism, thereby significantly correcting aberrations and improving imaging quality.

[0008] In addition, in the embodiment of the present application, the first lens element close to the object side in the first lens group can be set to have a negative optical focal length, and the Abbe number Vd1 of the first lens element satisfies Vd1>40. It can be understood that the larger the Abbe number, the milder the dispersion, and thus the dispersion can be effectively reduced, thereby reducing aberrations and further improving the imaging quality.

[0009] In a possible implementation of the first aspect, the first lens group includes two lenses, the second lens group includes two lenses, and the third lens group includes one lens.

[0010] That is, in the embodiment of the present application, a reasonable number of lenses can be set for each lens group. In some embodiments, the third lens group can also include two lenses or three lenses.

[0011] In a possible implementation of the first aspect, a lens height TTL of the optical lens and a focal length EFL of the optical lens satisfy TTL / EFL>2.

[0012] That is, in the embodiment of the present application, the above-mentioned setting of the lens height TTL and the focal length EFL of the optical lens to satisfy TTL / EFL>2 can achieve the setting of a reasonable physical length of the lens, so that the lens length is sufficient to place the lens for correcting aberrations.

[0013] In a possible implementation of the first aspect, at least one lens in the second lens group has an object-side sag SOn and an image-side sag SIn that satisfy SOn / SIn<1.

[0014] That is, in the embodiment of the present application, by limiting the ratio of the object-side sag height to the image-side sag height of at least one lens in the second lens group, astigmatism in the aberration can be effectively corrected.

[0015] In a possible implementation of the first aspect, an effective aperture DS1 of the first lens and an effective aperture DSi of the i-th lens closest to the image side in the third lens group satisfy 5>DS1 / DSi>0.5.

[0016] That is, in the embodiment of the present application, by limiting the ratio of the effective aperture of the first lens to the effective aperture of the last lens, when the ratio of the effective aperture of the first lens to the effective aperture of the last lens is within a preset range, the field curvature in the aberration can be effectively corrected.

[0017] In a possible implementation of the first aspect, the effective aperture DSi of the i-th lens closest to the image side in the third lens group and the image height ImgH of the optical lens satisfy 2>DSi / ImgH>0.5.

[0018] That is, in the embodiment of the present application, by limiting the ratio of the effective aperture of the last lens to the image height of the optical lens, when the ratio of the effective aperture of the last lens to the image height of the optical lens is within a preset range, the field curvature in the aberration can be effectively corrected.

[0019] In a possible implementation of the first aspect, the optical lens includes at least two first preset lenses, and the Abbe number of the first preset lenses is lower than 30.

[0020] That is, in the embodiment of the present application, chromatic aberration can be eliminated by setting a low Abbe number lens in combination with a high Abbe number lens.

[0021] In a possible implementation of the first aspect above, the optical lens includes multiple second preset lenses, the Abbe number of the second preset lenses is higher than 55, and the thickness CTH of at least one second preset lens and the thickness CTL of at least one first preset lens satisfy 15>CTH / CTL>1.1.

[0022] That is, in the embodiment of the present application, by limiting the thickness ratio of the high Abbe number lens to the low Abbe number lens, when the thickness ratio is within a preset range, chromatic aberration in the aberration can be effectively corrected.

[0023] In a possible implementation of the first aspect, the effective aperture DS1 of the first lens and the focal length EFL of the optical lens satisfy 16>DS1 / EFL>1.5.

[0024] That is, in the embodiment of the present application, by limiting the ratio of the effective aperture of the first lens to the focal length of the optical lens, the aperture size required for the optical lens can be reduced.

[0025] In a possible implementation of the first aspect, the effective aperture DS1 of the first lens and the half field of view HFOV of the optical lens satisfy 25>DS1+2*tan(HFOV)>3.

[0026] That is, in the embodiment of the present application, by limiting the mathematical relationship between the effective aperture of the first lens and the half field angle of the optical lens, the aperture size required for the optical lens can be reduced.

[0027] In a possible implementation of the first aspect, the image-side sag height SI1 of the first lens element and the object-side inflection point sag height SOC1 of the first lens element satisfy SI1 / SOC1>2.

[0028] That is, in the embodiment of the present application, by limiting the ratio of the image side sag height of the first lens to the object side inflection point sag height of the first lens, the optical lens can adopt an aspherical surface type, which can reduce the lens height of the optical lens.

[0029] In a possible implementation of the first aspect, a half field of view HFOV of the optical lens satisfies 85°>HFOV>45°.

[0030] That is, in the embodiment of the present application, when the half field angle of the optical lens meets the above range, a wide angle or an ultra-wide angle can be achieved.

[0031] In a possible implementation of the first aspect, the aperture value F of the optical lens satisfies F<1.9.

[0032] That is, in the embodiment of the present application, when the aperture value of the optical lens satisfies the above range, a large aperture can be achieved.

[0033] In a second aspect, an embodiment of the present application provides a camera module, comprising a photosensitive element and the optical lens of the first aspect described above, wherein the photosensitive element is located on the image side of the optical lens, and the optical lens is used to image light onto the photosensitive element.

[0034] In a third aspect, an embodiment of the present application provides an electronic device comprising the camera module of the second aspect described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions and advantages of the embodiments of the present application or the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0036] FIG1 shows a schematic diagram of the back side of an electronic device according to the present application;

[0037] FIG2 shows a schematic structural diagram of a camera module according to an embodiment of the present application;

[0038] FIG3A shows a schematic structural diagram of a camera module according to the first embodiment of the present application;

[0039] FIG3B is a schematic diagram showing the chromatic aberration correction performance of an optical lens according to the first embodiment of the present application;

[0040] FIG3C is a schematic diagram showing the astigmatism correction performance of an optical lens according to the first embodiment of the present application;

[0041] FIG3D is a schematic diagram showing the distortion correction performance of an optical lens according to the first embodiment of the present application;

[0042] FIG4A shows a schematic structural diagram of a camera module according to a second embodiment of the present application;

[0043] FIG4B is a schematic diagram showing the chromatic aberration correction performance of an optical lens according to the second embodiment of the present application;

[0044] FIG4C is a schematic diagram showing the astigmatism correction performance of an optical lens according to the second embodiment of the present application;

[0045] FIG4D is a schematic diagram showing the distortion correction performance of an optical lens according to the second embodiment of the present application;

[0046] FIG5A shows a schematic structural diagram of a camera module according to a third embodiment of the present application;

[0047] FIG5B is a schematic diagram showing the chromatic aberration correction performance of an optical lens according to the third embodiment of the present application;

[0048] FIG5C is a schematic diagram showing the astigmatism correction performance of an optical lens according to the third embodiment of the present application;

[0049] FIG5D is a schematic diagram showing the distortion correction performance of an optical lens according to the third embodiment of the present application;

[0050] FIG6A shows a schematic structural diagram of a camera module according to a fourth embodiment of the present application;

[0051] FIG6B is a schematic diagram showing the chromatic aberration correction performance of an optical lens according to the fourth embodiment of the present application;

[0052] FIG6C is a schematic diagram showing the astigmatism correction performance of an optical lens according to the fourth embodiment of the present application;

[0053] FIG6D is a schematic diagram showing the distortion correction performance of an optical lens according to the fourth embodiment of the present application;

[0054] FIG7A shows a schematic structural diagram of a camera module according to a fifth embodiment of the present application;

[0055] FIG7B is a schematic diagram showing the chromatic aberration correction performance of an optical lens according to the fifth embodiment of the present application;

[0056] FIG7C is a schematic diagram showing the astigmatism correction performance of an optical lens according to the fifth embodiment of the present application;

[0057] FIG7D is a schematic diagram showing the distortion correction performance of an optical lens according to the fifth embodiment of the present application;

[0058] FIG8A shows a schematic structural diagram of a camera module according to a sixth embodiment of the present application;

[0059] FIG8B is a schematic diagram showing the chromatic aberration correction performance of an optical lens according to the sixth embodiment of the present application;

[0060] FIG8C is a schematic diagram showing the astigmatism correction performance of an optical lens according to the sixth embodiment of the present application;

[0061] FIG8D is a schematic diagram showing the distortion correction performance of an optical lens according to the sixth embodiment of the present application;

[0062] FIG9A shows a schematic structural diagram of a camera module according to a seventh embodiment of the present application;

[0063] FIG9B is a schematic diagram showing the chromatic aberration correction performance of an optical lens according to the seventh embodiment of the present application;

[0064] FIG9C is a schematic diagram showing the astigmatism correction performance of an optical lens according to the seventh embodiment of the present application;

[0065] FIG9D shows a schematic diagram of the distortion correction performance of an optical lens according to the seventh embodiment of the present application. DETAILED DESCRIPTION

[0066] For ease of understanding, the technical terms involved in this application are explained and described below.

[0067] Focal length, also known as focal length, refers to the distance along the optical axis from the image side principal surface to the image side focal plane of a lens or lens group when a clear image of an object is formed in the image side space through a lens or lens group.

[0068] Aperture, also known as F-number (FNO), is a relative value calculated by dividing the focal length of a lens by the diameter of its entrance pupil (the inverse of the relative aperture). The smaller the aperture, the more light enters the image per unit time. The smaller the aperture, the smaller the depth of field, and the background in the photo will be blurred.

[0069] Total track length (TTL) refers to the total length from the object side of the optical lens closest to the object side to the imaging surface, and is the main factor in determining the height of the camera.

[0070] The dispersion coefficient, also known as the Abbe number, is an index used to indicate the dispersion ability of a transparent medium. Generally speaking, the larger the refractive index of the medium, the smaller the Abbe number and the more severe the dispersion; conversely, the smaller the refractive index of the medium, the larger the Abbe number and the less severe the dispersion.

[0071] The object side, with the lens as the boundary, is the side where the scene to be imaged is located.

[0072] The image side is the side where the image of the scene to be imaged is located, with the lens as the boundary.

[0073] Image height (ImgH) is half the diagonal length of the effective pixel area on the photosensitive chip, that is, the image height of the imaging surface.

[0074] Entrance Pupil Diameter (EPD) refers to the ratio of the focal length of an optical lens to the aperture F value.

[0075] Effective aperture, the maximum effective diameter of the lens, that is, the maximum diameter of the light passing through the lens.

[0076] In optical instruments, the field of view (FOV) is the angle between the two edges of the maximum range through which the image of the measured object can pass, with the lens as the vertex. The field of view determines the visual range of the optical instrument. A larger field of view means a wider field of view and a smaller optical magnification.

[0077] Half field of view (HFOV), half of the field of view.

[0078] Sagitta is the vertical distance between the geometric center of the surface and the diameter plane corresponding to the surface.

[0079] Aberration refers to the deviation between the imaging result in an actual optical system and the ideal imaging condition. Aberrations include field curvature, astigmatism, distortion, chromatic aberration, etc.

[0080] The technical solutions in the embodiments of the present application will be described clearly and in detail below with reference to the accompanying drawings.

[0081] Please refer to Figure 1, which is a schematic diagram of the back side of an electronic device illustrated in this application. Electronic device 100 may be a mobile phone, digital tablet, laptop, video camera, video recorder, still camera, smart TV, network monitoring device, somatosensory game console, driving recorder, reversing camera, wearable electronic device, small drone, 3D image capture device, or other device with photo or video recording capabilities. The following description uses a mobile phone as an example of electronic device 100.

[0082] The electronic device 100 includes a camera module 1, an image processor 2 and a housing 3. The housing 3 is provided with a light hole 31, and the light incident side of the camera module 1 is arranged opposite to the light hole 31 of the housing 3. The camera module includes an optical lens 10. For the convenience of illustration, the optical lens 10 is not shown in Figure 1. The lens camera module 1 and the image processor 2 are both arranged inside the housing 3. The image processor 2 is communicatively connected to the camera module 1, and the camera module 1 is used to obtain image data and input the image data into the image processor 2, and the image processor 2 is used to process the image data output therein. It should be noted that Figure 1 is only a structural schematic diagram of an embodiment of the present application, and the structures of the camera module 1, image processor 2 and housing 3 shown therein are only schematic.

[0083] Image processor 2 can be a separate image processing chip or a digital signal processing (DSP) chip, which is used to quickly and promptly transmit data obtained by the photosensitive element of camera module 1 to the central processing unit and refresh the photosensitive element. Image processor 2 can also be integrated into other chips (such as a central processing chip).

[0084] In the embodiment shown in Figure 1, the camera module 1 is arranged on the back of the electronic device 100, and serves as the rear lens of the electronic device 100. It is understandable that in some embodiments, the camera module 1 can also be arranged on the front of the electronic device 100, as the front lens of the electronic device 100. Both the front lens and the rear lens can be used for selfies, and can also be used by the photographer to take pictures of other objects. It should be understood that the installation position of the camera module 1 of the electronic device 100 in the embodiment shown in Figure 1 is merely schematic. In some other embodiments, the camera module 1 can also be installed at other positions on the electronic device 100, such as on a component that is movable or rotatable relative to the electronic device 100.

[0085] At present, as the requirements for shooting quality gradually increase, how to improve imaging quality is a technical problem that needs to be solved.

[0086] The embodiments of the present application provide an optical lens, a camera module, and an electronic device. The optical lens 10 includes a first lens group, a second lens group, and a third lens group, arranged sequentially from the object side to the image side. The effective aperture DSn of at least one lens in the second lens group satisfies the relationship between the entrance pupil diameter (EPD) of the optical lens and 2.5>DSn / EPD>1.1. It is understood that the lenses of the second lens group serve as core convergence lenses during light propagation. The present application provides a wide range of 2.5>DSn / EPD>1.1 between the effective aperture DSn of at least one lens in the second lens group and the entrance pupil diameter (EPD) of the optical lens. This effectively reduces the incident angle of light through at least one lens, improves the convergence effect, and effectively reduces astigmatism, thereby significantly correcting aberrations and improving imaging quality.

[0087] In addition, in the embodiment of the present application, the first lens element close to the object side in the first lens group can be set to have a negative optical focal length, and the Abbe number Vd1 of the first lens element satisfies Vd1>40. It can be understood that the larger the Abbe number, the milder the dispersion, and thus the dispersion can be effectively reduced, thereby reducing aberrations and further improving the imaging quality.

[0088] The structure of the camera module 1 and the setting of related optical parameters are described in detail below with reference to the accompanying drawings.

[0089] Referring to Figure 2, the camera module 1 includes an optical lens 10 and a photosensitive element 20. The light from the scene passes through the optical lens 10 to form a clear image on the imaging surface, and the image of the scene is recorded by the photosensitive element 20 located on the imaging surface. Among them, the imaging surface refers to the plane where the image is located after the scene is imaged by the optical lens 10. The optical lens 10 includes a plurality of lenses arranged in sequence from the object side to the image side, and the lenses cooperate to form an image with a better imaging effect. Among them, the object side refers to the side where the photographed scene is located, and the image side refers to the side where the imaging plane is located.

[0090] The camera module 1 may further include an infrared filter 30, which may be fixed to the circuit board and located between the optical lens 10 and the photosensitive element 20. It is understood that the light passing through the optical lens 10 is irradiated onto the infrared filter 30 and is transmitted to the photosensitive element 20 through the infrared filter 30.

[0091] The optical lens 10 includes a first lens group, a second lens group, and a third lens group. Optionally, the first lens group may include two lenses, the second lens group may further include two lenses, and the third lens group may further include three lenses. For example, as shown in FIG2 , the first lens group may include a first lens L1 and a second lens L2, the second lens group may include a third lens L3 and a fourth lens L4, and the third lens group may include a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0092] In other optional embodiments, the first lens group may include two lenses, the second lens group may include three lenses, and the third lens group may include two lenses. Specifically, the first lens group includes a first lens L1 and a second lens L2, the second lens group includes a third lens L3, a fourth lens L4, and a fifth lens L5, and the third lens group includes a sixth lens L6 and a seventh lens L7.

[0093] In some other optional embodiments, the first lens group may include two lenses, the second lens group may include two lenses, and the third lens group may include one lens.

[0094] In some other optional embodiments, the first lens group may include two lenses, the second lens group may include two lenses, and the third lens group may include two lenses.

[0095] In some other optional embodiments, the first lens group may include two lenses, the second lens group may include three lenses, and the third lens group may include one lens.

[0096] It can be understood that the above-mentioned configuration of each lens group is only an example, and other configurations can be used according to actual needs.

[0097] According to some embodiments, the optical lens 10 satisfies the following relationship: 2.5>DSn / EPD>1.1;

[0098] Wherein, DSn is the effective aperture of at least one lens in the second lens group. Referring to FIG. 2 , EPD is the entrance pupil diameter of the optical lens 10 .

[0099] In the embodiment of the present application, the second lens group functions as a core convergence lens. By limiting the ratio of the effective aperture to the entrance pupil diameter of at least one lens in the second lens group, the present application can significantly reduce aberrations and significantly improve the imaging quality of the optical lens 10 when the ratio of the effective aperture to the entrance pupil diameter meets the above conditions. For example, the above ratio can be 2.4, 2.2, 2.0, 1.8, 1.6, 1.4, 1.2, and so on. It can be understood that for ultra-wide-angle, large-aperture lenses, the larger the ratio of the effective aperture to the entrance pupil diameter of the lens that functions as a core convergence lens, the better the imaging effect.

[0100] According to some embodiments, the optical lens 10 satisfies the following relationship: Vd1>40,

[0101] Wherein, Vd1 is the Abbe number of the first lens L1 located on the object side in the first lens group, and the first lens L1 has negative refractive power.

[0102] In the embodiment of the present application, by limiting the Abbe number of first lens L1 and limiting the first lens L1 to have a negative optical power, first lens L1 can be made to diverge light, thereby increasing the field of view of first lens L1, thereby achieving a wide-angle lens for optical lens 10. For example, the Abbe number of first lens L1 can be 40, 50, etc.

[0103] According to some embodiments, the optical lens 10 satisfies the following relationship: TTL / EFL>2;

[0104] 2 , TTL is the lens height of the optical lens 10 , and EFL is the focal length of the optical lens 10 .

[0105] In the embodiment of the present application, by limiting the ratio of lens height to focal length, the optical lens 10 can have a reasonable physical length, sufficient to accommodate the lens for correcting aberrations, and not too long. For example, the above arrangement can be 2.1, 2.2, 2.3, etc.

[0106] According to some embodiments, the optical lens 10 satisfies the following relationship: SOn / SIn<1;

[0107] Wherein, SOn is the object-side sag height of at least one lens in the second lens group, and SIn is the image-side sag height Sin of the at least one lens.

[0108] In the embodiment of the present application, by limiting the ratio of the object-side sag height to the image-side sag height of at least one lens in the second lens group, astigmatism in the aberration can be effectively corrected. For example, the ratio can be 0.9, 0.8, etc.

[0109] According to some embodiments, the optical lens 10 satisfies the following relationship: 5>DS1 / DSi>0.5;

[0110] DS1 is the effective aperture of the first lens L1, and DSi is the effective aperture of the i-th lens closest to the image side in the third lens group.

[0111] In the embodiment of the present application, by limiting the ratio of the effective aperture of the first lens L1 to the effective aperture of the last lens, field curvature among aberrations can be effectively corrected when the ratio of the effective aperture of the first lens L1 to the effective aperture of the last lens is within a preset range. For example, the above ratio can be 0.6, 0.7, 0.8, 0.9, 1.0, 2.0, 3.0, 4.0, 4.5, 4.9, etc.

[0112] According to some embodiments, the optical lens 10 satisfies the following relationship: 2>DSi / ImgH>0.5,

[0113] Wherein, DSi is the effective aperture of the i-th lens closest to the image side in the third lens group, and ImgH is the image height of the optical lens 10.

[0114] In the embodiment of the present application, by limiting the ratio of the effective aperture of the last lens to the image height of the optical lens 10, field curvature in the aberration can be effectively corrected when the ratio of the effective aperture of the last lens to the image height of the optical lens 10 is within a preset range. For example, the above ratio can be 1.9, 1.8, 1.7, 1.5, 1.0, 0.9, 0.8, 0.7, 0.6, etc.

[0115] According to some embodiments, the optical lens 10 satisfies the following relationship: 15>CTH / CTL>1.1,

[0116] The optical lens 10 includes at least two first preset lenses with an Abbe number lower than 30 and multiple second preset lenses with an Abbe number higher than 55. CTH is the thickness of at least one second preset lens, and CTL is the thickness of at least one first preset lens.

[0117] In the embodiments of the present application, by limiting the thickness ratio of the high-Abbe number lens to the low-Abbe number lens, chromatic aberration can be effectively corrected when the thickness ratio is within a preset range. For example, the above ratio can be 14.9, 14.5, 14, 13, 12, 11, 10, 5, 3, 2, 1.5, 1.2, etc.

[0118] According to some embodiments, the optical lens 10 satisfies the following relationship: 16>DS1 / EFL>1.5,

[0119] Wherein, DS1 is the effective aperture of the first lens L1, and EFL is the focal length of the optical lens 10.

[0120] In the embodiment of the present application, by limiting the ratio of the effective aperture of the first lens L1 to the focal length of the optical lens 10, when the ratio of the effective aperture of the first lens L1 to the focal length of the optical lens 10 is within a preset range, the aperture size of the electronic device 100 corresponding to the optical lens 10 can be reduced. For example, the above ratio can be 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1.8, 1.6, etc.

[0121] According to some embodiments, the optical lens 10 satisfies the following relationship: 25>DS1+2*tan(HFOV)>3,

[0122] DS1 is the effective aperture of the first lens L1, and HFOV is the half field of view of the optical lens 10.

[0123] In the embodiment of the present application, by limiting the mathematical relationship between the effective aperture of the first lens L1 and the half-angle of view of the optical lens 10, the aperture size of the electronic device 100 corresponding to the optical lens 10 can be reduced. For example, the above expression can be 24, 23, 22, 21, 20, 15, 10, 5, 4, 3.5, 3.1, etc.

[0124] According to some embodiments, the optical lens 10 satisfies the following relationship: SI1 / SOC1>2;

[0125] Wherein, SI1 is the image side sag of the first lens L1, and SOC1 is the object side inflection point sag of the first lens L1.

[0126] In the embodiment of the present application, by limiting the ratio of the image-side sag height of the first lens L1 to the object-side inflection point sag height of the first lens L1, when the ratio of the image-side sag height of the first lens L1 to the object-side inflection point sag height of the first lens L1 is greater than 2, the optical lens 10 can adopt an aspherical surface type, thereby reducing the lens height of the optical lens 10. For example, the above ratio can be 2.1, 2.2, 2.3, 2.4, 2.5, 3, etc.

[0127] According to some embodiments, the optical lens 10 satisfies the following relationship: 85°>HFOV>45°,

[0128] Here, HFOV is the half field of view of the optical lens 10 .

[0129] In the embodiment of the present application, when the half-viewing angle of the optical lens 10 meets the above range, a wide angle or an ultra-wide angle can be achieved. For example, the half-viewing angle can be 84°, 80°, 70°, 55°, 50°, 46°, etc.

[0130] According to some embodiments, the optical lens 10 satisfies the following relationship: F<1.9,

[0131] Wherein, F is the aperture value of the optical lens 10 .

[0132] In the embodiment of the present application, when the aperture value of the optical lens 10 meets the above range, a large aperture can be achieved. For example, the aperture value can be 1.8, 1.7, 1.6, 1.5, 1.4, 1.3, 1.2, 1.1, 1.0, etc.

[0133] This embodiment sets the parameters of each lens and coordinates the parameters between the lenses, so that the optical lens 10 can fully correct the aberration on the basis of having wide-angle and large aperture characteristics, so that the optical lens 10 has a better imaging effect and at the same time reduces the opening size of the electronic device 100.

[0134] It is understood that the above-mentioned different limitations on different parameters of the optical lens can exist independently of each other or can be combined with each other. When all the above-mentioned limits are combined with each other, the optical lens can have a more optimal size or can obtain better imaging quality.

[0135] It can be understood that FIG2 only schematically shows some components of the camera module 1 , and the actual shape, actual size and actual structure of these components are not limited by FIG2 .

[0136] FIG3A illustrates the structure of the camera module 1 according to the first embodiment of the present application.

[0137] In the first embodiment, the optical lens 10 includes an aperture and seven lenses. Specifically, a first lens group, a second lens group, and a third lens group are arranged in sequence from the object side to the image side. The first lens group includes a first lens L1 and a second lens L2; ​​the second lens group includes a third lens L3, a fourth lens L4, and a fifth lens L5; and the third lens group includes a sixth lens L6 and a seventh lens L7.

[0138] In this embodiment of the present application, the object-side surface of the first lens L1 is concave near the optical axis, and the image-side surface is concave near the optical axis. The object-side surface of the second lens L2 is convex near the optical axis, and the image-side surface is concave near the optical axis.

[0139] The object-side surface of the third lens L3 is convex near the optical axis, and the image-side surface is convex near the optical axis. The object-side surface of the fourth lens L4 is convex near the optical axis, and the image-side surface is concave near the optical axis. The object-side surface of the fifth lens L5 is convex near the optical axis, and the image-side surface is convex near the optical axis. The effective aperture DSn of the third lens L3, the fourth lens L4, and the fifth lens L5 in the second lens group and the entrance pupil diameter EPD of the optical lens 10 satisfy 2.5>DSn / EPD>1.1. Specifically, DS3 / EPD is 1.89, DS4 / EPD is 1.69, and DS5 / EPD is 1.84. It can be understood that DSn represents the effective aperture of the nth lens. For example, DS3 can represent the effective aperture of the third lens L3. The same applies to the effective apertures of the other lenses. It can be understood that the second lens group plays a core converging role, which can significantly reduce aberrations and significantly improve the imaging quality of the optical lens 10.

[0140] The object-side surface of the sixth lens element L6 is concave near the optical axis, and the image-side surface is convex near the optical axis. The object-side surface of the seventh lens element L7 is convex near the optical axis, and the image-side surface is concave near the optical axis. The effective aperture DS1 of the first lens element L1 and the effective aperture DS7 of the seventh lens element L7 satisfy the ratio DS1 / DS7 of 1.02, effectively correcting field curvature. The effective aperture DS7 of the seventh lens element L7 and the image height ImgH of the optical lens 10 satisfy the ratio DS7 / ImgH of 1.85, effectively correcting field curvature.

[0141] In this embodiment, the first preset lens has an Abbe number of 19.4 and includes the second lens L2, the fourth lens L4, and the sixth lens L6. The second preset lens has an Abbe number of 56 and includes the first lens L1, the third lens L3, the fifth lens L5, and the seventh lens L7. The ratio of the thickness CTH of any lens among the first lens L1, the third lens L3, the fifth lens L5, and the seventh lens L7 to the thickness CTL of any lens among the fourth lens L4 and the sixth lens L6 satisfies 15>CTH / CTL>1.1, effectively correcting chromatic aberration.

[0142] According to the relationship formula introduced above, the optical design parameters of the optical lens 10 in the first embodiment of the present application are as follows:

[0143] Table 1 Structural data of various components of the camera module 1 of the first embodiment

[0144] In the above table, the meanings of the symbols are as follows:

[0145] OBJ: object distance;

[0146] S1: object-side surface of the first lens L1;

[0147] S2: image-side surface of the first lens L1;

[0148] S3: object-side surface of the second lens L2;

[0149] S4: image-side surface of the second lens L2;

[0150] STO: aperture;

[0151] S5: object-side surface of the third lens L3;

[0152] S6: image-side surface of the third lens L3;

[0153] S7: object-side surface of the fourth lens L4;

[0154] S8: image-side surface of the fourth lens L4;

[0155] S9: object-side surface of the fifth lens L5;

[0156] S10: image-side surface of the fifth lens L5;

[0157] S11: object-side surface of the sixth lens L6;

[0158] S12: image-side surface of the sixth lens L6;

[0159] S13: object-side surface of the seventh lens L7;

[0160] S14: image-side surface of the seventh lens L7;

[0161] S15: object-side surface of the infrared filter 30;

[0162] S16: image side surface of the outer filter 30;

[0163] S17: Imaging surface.

[0164] It should be noted that, unless otherwise specified, the meanings of the above symbols in this application will remain the same when they appear again in the future and will not be repeated.

[0165] Table 2 Aspheric coefficients of the optical lens 10 of the first embodiment

[0166] Wherein, K represents the conical coefficient in the aspheric curve equation, and A4, A6, A8, A10, A12, A14, A16, and A18 represent the 4th, 6th, 8th, 10th, 12th, 14th, 16th, and 18th order aspheric coefficients of each surface. It should be noted that the parameters in the table are expressed in scientific notation. In this application, the symbols K, A4, A6, A8, A10, A12, A14, A16, and A18 will have the same meaning as herein unless otherwise explained, and will not be repeated hereafter.

[0167] By substituting the above parameters into the formula, each lens of the optical lens 10 of this embodiment can be designed:

[0168] Where z is the optical surface sag; k is the cone coefficient; c is the radius of curvature; r is the radius height in the direction of the optical axis; r2=x2+y2; A i are the polynomial coefficients; r i is the normalized radial coordinate.

[0169] 3B , 3C and 3D , which illustrate the optical performance of the optical lens 10 according to the first embodiment.

[0170] Figure 3B illustrates the axial chromatic aberration of light with wavelengths of 650 nm, 610 nm, 550 nm, 510 nm, and 470 nm after passing through the optical lens 10 according to the first embodiment. The ordinate represents the normalized pupil coordinate, and the abscissa represents the axial chromatic aberration, both in millimeters. As can be seen from Figure 3B , in this embodiment, the axial chromatic aberration of the optical lens 10 in each state is kept within a very small range.

[0171] Figure 3C illustrates the astigmatism of light with a wavelength of 550 nm after passing through the optical lens 10 of the first embodiment. The solid line represents the astigmatism of the 550 nm light in the meridional direction after passing through the optical lens 10, and the dashed line represents the field curvature of the 550 nm light in the sagittal direction after passing through the optical lens 10. The ordinate represents the object angle, and the abscissa represents the astigmatism values ​​in the meridional direction (dashed line) and sagittal direction (solid line), both in millimeters. As can be seen from Figure 3C , in this embodiment, the astigmatism of the optical lens 10 in various states is controlled within a very small range.

[0172] Figure 3D shows the distortion of light with a wavelength of 550 nm after passing through the optical lens 10 of the first embodiment. The ordinate represents the object angle, and the abscissa represents the optical distortion values ​​corresponding to different fields of view, expressed in percentages. As can be seen from Figure 3C , in this embodiment, the distortion of the optical lens 10 is kept within a very small range.

[0173] This embodiment sets the parameters of each lens and coordinates the parameters between the lenses, so that the optical lens 10 can fully correct the aberration on the basis of having wide-angle and large aperture characteristics, so that the optical lens 10 has a better imaging effect and at the same time reduces the opening size of the electronic device 100.

[0174] FIG4A illustrates the structure of a camera module 1 according to a second embodiment of the present application.

[0175] In the second embodiment, the optical lens 10 includes an aperture and seven lenses. Specifically, a first lens group, a second lens group, and a third lens group are arranged in sequence from the object side to the image side. The first lens group L1 includes a first lens L1 and a second lens L2; ​​the second lens group includes a third lens L3, a fourth lens L4, and a fifth lens L5; and the third lens group includes a sixth lens L6 and a seventh lens L7.

[0176] In this embodiment of the present application, the object-side surface of the first lens L1 is concave near the optical axis, and the image-side surface is concave near the optical axis. The object-side surface of the second lens L2 is convex near the optical axis, and the image-side surface is concave near the optical axis.

[0177] The object-side surface of the third lens L3 is convex near the optical axis, and the image-side surface is convex near the optical axis. The object-side surface of the fourth lens L4 is convex near the optical axis, and the image-side surface is convex near the optical axis. The object-side surface of the fifth lens L5 is concave near the optical axis, and the image-side surface is concave near the optical axis. The effective aperture DSn of the third lens L3, the fourth lens L4, and the fifth lens L5 in the second lens group and the entrance pupil diameter EPD of the optical lens 10 satisfy 2.5>DSn / EPD>1.1. Specifically, DS3 / EPD is 1.88, DS4 / EPD is 1.9, and DS5 / EPD is 1.83. It can be understood that the second lens group plays a core converging role, which can greatly reduce aberrations and significantly improve the imaging quality of the optical lens 10.

[0178] The object-side surface of the sixth lens element L6 is convex near the optical axis, and the image-side surface is concave near the optical axis. The object-side surface of the seventh lens element L7 is convex near the optical axis, and the image-side surface is concave near the optical axis. The effective aperture DS1 of the first lens element L1 and the effective aperture DS7 of the seventh lens element L7 satisfy DS1 / DS7 = 1, effectively correcting field curvature among aberrations. The effective aperture DS7 of the seventh lens element L7 and the image height ImgH of the optical lens 10 satisfy DS7 / ImgH = 1.66, effectively correcting field curvature among aberrations.

[0179] In this embodiment, the first preset lens has an Abbe number of 19.4 and includes the second lens L2 and the fifth lens L5. The second preset lens has an Abbe number of 56 and includes the first lens L1, the third lens L3, the fourth lens L4, the sixth lens L6, and the seventh lens L7. The ratio of the thickness CTH of any lens among the first lens L1, the third lens L3, the fourth lens L4, the sixth lens L6, and the seventh lens L7 to the thickness CTL of the fifth lens L5 satisfies 15>CTH / CTL>1.1, effectively correcting chromatic aberration.

[0180] According to the relationship described above, the optical design parameters of the optical lens 10 in the second embodiment of the present application are as follows:

[0181] Table 3 Structural data of components of the camera module 1 of the second embodiment

[0182] Table 4 Aspheric coefficients of the optical lens 10 of the second embodiment

[0183] By substituting the above parameters into the formula, each lens of the optical lens 10 of this embodiment can be designed:

[0184] Where z is the optical surface sag; k is the cone coefficient; c is the radius of curvature; r is the radius height in the direction of the optical axis; r2=x2+y2; A i are the polynomial coefficients; r i is the normalized radial coordinate.

[0185] 4B , 4C and 4D , which illustrate the optical performance of the optical lens 10 according to the second embodiment.

[0186] Figure 4B shows the axial chromatic aberration of light with wavelengths of 650 nm, 610 nm, 550 nm, 510 nm, and 470 nm after passing through the optical lens 10 of the second embodiment. The ordinate represents the normalized pupil coordinate, and the abscissa represents the axial chromatic aberration, both in millimeters. As can be seen from Figure 4B , in this embodiment, the axial chromatic aberration of the optical lens 10 in each state is kept within a very small range.

[0187] Figure 4C illustrates the astigmatism of light with a wavelength of 550 nm after passing through the optical lens 10 of the second embodiment. The solid line represents the astigmatism of the 550 nm light in the meridional direction after passing through the optical lens 10, and the dashed line represents the field curvature of the 550 nm light in the sagittal direction after passing through the optical lens 10. The ordinate represents the object angle, and the abscissa represents the astigmatism values ​​in the meridional (dashed line) and sagittal (solid line) directions, both in millimeters. As can be seen from Figure 4C , in this embodiment, the astigmatism of the optical lens 10 in various states is controlled within a very small range.

[0188] Figure 4D shows the distortion of light with a wavelength of 550 nm after passing through the optical lens 10 of the second embodiment. The ordinate represents the object angle, and the abscissa represents the optical distortion values ​​corresponding to different fields of view, expressed in percentages. As can be seen from Figure 4C , in this embodiment, the distortion of the optical lens 10 is kept within a very small range.

[0189] This embodiment sets the parameters of each lens and coordinates the parameters between the lenses, so that the optical lens 10 can fully correct the aberration on the basis of having wide-angle and large aperture characteristics, so that the optical lens 10 has a better imaging effect and at the same time reduces the opening size of the electronic device 100.

[0190] FIG5A illustrates the structure of a camera module 1 according to a third embodiment of the present application.

[0191] In the third embodiment, the optical lens 10 includes an aperture and seven lenses. Specifically, a first lens group, a second lens group, and a third lens group are arranged in sequence from the object side to the image side. The first lens group includes a first lens L1 and a second lens L2; ​​the second lens group includes a third lens L3, a fourth lens L4, and a fifth lens L5; and the third lens group includes a sixth lens L6 and a seventh lens L7.

[0192] In this embodiment of the present application, the object-side surface of the first lens L1 is concave near the optical axis, and the image-side surface is concave near the optical axis. The object-side surface of the second lens L2 is convex near the optical axis, and the image-side surface is concave near the optical axis.

[0193] The object-side surface of the third lens L3 is convex near the optical axis, and the image-side surface is convex near the optical axis. The object-side surface of the fourth lens L4 is convex near the optical axis, and the image-side surface is concave near the optical axis. The object-side surface of the fifth lens L5 is convex near the optical axis, and the image-side surface is convex near the optical axis. The effective aperture DSn of the third lens L3, the fourth lens L4, and the fifth lens L5 in the second lens group and the entrance pupil diameter EPD of the optical lens 10 satisfy 2.5>DSn / EPD>1.1. Specifically, DS3 / EPD is 1.78, DS4 / EPD is 2, and DS5 / EPD is 2.29. It can be understood that the second lens group plays a core converging role, which can greatly reduce aberrations and significantly improve the imaging quality of the optical lens 10.

[0194] The object-side surface of the sixth lens element L6 is convex near the optical axis, and the image-side surface is convex near the optical axis. The object-side surface of the seventh lens element L7 is convex near the optical axis, and the image-side surface is concave near the optical axis. The effective aperture DS1 of the first lens element L1 and the effective aperture DS7 of the seventh lens element L7 satisfy DS1 / DS7 of 1.01, effectively correcting field curvature among aberrations. The effective aperture DS7 of the seventh lens element L7 and the image height ImgH of the optical lens 10 satisfy DS7 / ImgH of 1.73, effectively correcting field curvature among aberrations.

[0195] In this embodiment, the first preset lens has an Abbe number of 19.4 and includes the second lens L2 and the fifth lens L5. The second preset lens has an Abbe number of 56 and includes the first lens L1, the third lens L3, the fourth lens L4, the sixth lens L6, and the seventh lens L7. The ratio of the thickness CTH of the third lens L3 to the thickness CTL of the second lens L2 satisfies 15>CTH / CTL>1.1, effectively correcting chromatic aberration.

[0196] According to the relationship formula introduced above, the optical design parameters of the optical lens 10 in the third embodiment of the present application are as follows:

[0197] Table 5 Structural data of components of the camera module 1 of the third embodiment

[0198] Table 6 Aspheric coefficients of the optical lens 10 of the third embodiment

[0199] By substituting the above parameters into the formula, each lens of the optical lens 10 of this embodiment can be designed:

[0200] Where z is the optical surface sag; k is the cone coefficient; c is the radius of curvature; r is the radius height in the direction of the optical axis; r2=x2+y2; A i are the polynomial coefficients; r i is the normalized radial coordinate.

[0201] 5B , 5C and 5D , which illustrate the optical performance of the optical lens 10 according to the third embodiment.

[0202] Figure 5B shows the axial chromatic aberration of light with wavelengths of 650 nm, 610 nm, 550 nm, 510 nm, and 470 nm after passing through the optical lens 10 according to the third embodiment. The ordinate represents the normalized pupil coordinate, and the abscissa represents the axial chromatic aberration, both in millimeters. As can be seen from Figure 5B , in this embodiment, the axial chromatic aberration of the optical lens 10 in each state is kept within a very small range.

[0203] Figure 5C illustrates the astigmatism of light with a wavelength of 550 nm after passing through the optical lens 10 of the third embodiment. The solid line represents the astigmatism of the 550 nm light in the meridional direction after passing through the optical lens 10, and the dashed line represents the field curvature of the 550 nm light in the sagittal direction after passing through the optical lens 10. The ordinate represents the object angle, and the abscissa represents the astigmatism values ​​in the meridional (dashed line) and sagittal (solid line) directions, both in millimeters. As can be seen from Figure 5C , in this embodiment, the astigmatism of the optical lens 10 in various states is controlled within a very small range.

[0204] Figure 5D shows the distortion of light with a wavelength of 550 nm after passing through the optical lens 10 of the third embodiment. The ordinate represents the object angle, and the abscissa represents the optical distortion values ​​corresponding to different fields of view, expressed in percentages. As can be seen from Figure 5C , in this embodiment, the distortion of the optical lens 10 is kept within a very small range.

[0205] This embodiment sets the parameters of each lens and coordinates the parameters between the lenses, so that the optical lens 10 can fully correct the aberration on the basis of having wide-angle and large aperture characteristics, so that the optical lens 10 has a better imaging effect and at the same time reduces the opening size of the electronic device 100.

[0206] FIG6A illustrates the structure of a camera module 1 according to a fourth embodiment of the present application.

[0207] In the fourth embodiment, the optical lens 10 includes an aperture and eight lenses. Specifically, a first lens group, a second lens group, and a third lens group are arranged in sequence from the object side to the image side. The first lens group includes a first lens L1 and a second lens L2; ​​the second lens group includes a third lens L3, a fourth lens L4, and a fifth lens L5; and the third lens group includes a sixth lens L6, a seventh lens L7, and an eighth lens L8.

[0208] In this embodiment of the present application, the object-side surface of the first lens L1 is concave near the optical axis, and the image-side surface is concave near the optical axis. The object-side surface of the second lens L2 is convex near the optical axis, and the image-side surface is concave near the optical axis.

[0209] The object-side surface of the third lens L3 is concave near the optical axis, and the image-side surface is convex near the optical axis. The object-side surface of the fourth lens L4 is convex near the optical axis, and the image-side surface is concave near the optical axis. The object-side surface of the fifth lens L5 is convex near the optical axis, and the image-side surface is convex near the optical axis. The effective aperture DSn of the third lens L3, the fourth lens L4, and the fifth lens L5 in the second lens group and the entrance pupil diameter EPD of the optical lens 10 satisfy 2.5>DSn / EPD>1.1. Specifically, DS3 / EPD is 1.44, DS4 / EPD is 1.78, and DS5 / EPD is 1.95. It can be understood that the second lens group plays a core converging role, which can greatly reduce aberrations and significantly improve the imaging quality of the optical lens 10.

[0210] The object-side surface of the sixth lens element L6 is concave near the optical axis, and the image-side surface is convex near the optical axis. The object-side surface of the seventh lens element L7 is convex near the optical axis, and the image-side surface is convex near the optical axis. The object-side surface of the first lens element L1 of the eighth lens element L8 is convex near the optical axis, and the image-side surface is concave near the optical axis. The effective aperture DS1 and the effective aperture DS7 of the eighth lens element L8 satisfy the ratio DS1 / DS8 of 0.77, effectively correcting field curvature among aberrations. The effective aperture DS8 of the eighth lens element L8 and the image height ImgH of the optical lens 10 satisfy the ratio DS8 / ImgH of 1.82, effectively correcting field curvature among aberrations.

[0211] In this embodiment, the first preset lens system has an Abbe number of 19.4 and includes the second lens element L2, the fourth lens element L4, and the sixth lens element L6. The second preset lens system has an Abbe number of 56 and includes the first lens element L1, the third lens element L3, the fifth lens element L5, the seventh lens element L7, and the eighth lens element L8. The ratio of the thickness CTH of any lens element among the third lens element L3, the fifth lens element L5, and the seventh lens element L7 to the thickness CTL of any lens element among the second lens element L2, the fourth lens element L4, and the sixth lens element L6 satisfies 15>CTH / CTL>1.1, effectively correcting chromatic aberration.

[0212] According to the relationship formula introduced above, the optical design parameters of the optical lens 10 in the fourth embodiment of the present application are as follows:

[0213] Table 7 Structural data of each component of the camera module 1 of the fourth embodiment

[0214] In the above table, some symbols have the following meanings:

[0215] S15: image-side surface of the eighth lens L8;

[0216] S16: image-side surface of the eighth lens L8;

[0217] S17: the object side surface of the infrared filter 30;

[0218] S18: image side surface of the outer filter 30;

[0219] S19: Imaging surface.

[0220] Table 8 Aspheric coefficients of the optical lens 10 of the fourth embodiment

[0221] By substituting the above parameters into the formula, each lens of the optical lens 10 of this embodiment can be designed:

[0222] Where z is the optical surface sag; k is the cone coefficient; c is the radius of curvature; r is the radius height in the direction of the optical axis; r2=x2+y2; A i are the polynomial coefficients; r i is the normalized radial coordinate.

[0223] 6B , 6C and 6D , which illustrate the optical performance of the optical lens 10 according to the fourth embodiment.

[0224] Figure 6B shows the axial chromatic aberration of light with wavelengths of 650 nm, 610 nm, 550 nm, 510 nm, and 470 nm after passing through the optical lens 10 according to the fourth embodiment. The ordinate represents the normalized pupil coordinate, and the abscissa represents the axial chromatic aberration, both in millimeters. As can be seen from Figure 6B , in this embodiment, the axial chromatic aberration of the optical lens 10 in each state is kept within a very small range.

[0225] Figure 6C illustrates the astigmatism of light with a wavelength of 550 nm after passing through the optical lens 10 of the fourth embodiment. The solid line represents the astigmatism of the 550 nm light in the meridional direction after passing through the optical lens 10, and the dashed line represents the field curvature of the 550 nm light in the sagittal direction after passing through the optical lens 10. The ordinate represents the object angle, and the abscissa represents the astigmatism values ​​in the meridional (dashed line) and sagittal (solid line) directions, both in millimeters. As can be seen from Figure 6C , in this embodiment, the astigmatism of the optical lens 10 in various states is controlled within a very small range.

[0226] Figure 6D shows the distortion of light with a wavelength of 550 nm after passing through the optical lens 10 of the fourth embodiment. The ordinate represents the object angle, and the abscissa represents the optical distortion values ​​corresponding to different fields of view, expressed in percentages. As can be seen from Figure 6C , in this embodiment, the distortion of the optical lens 10 is kept within a very small range.

[0227] This embodiment sets the parameters of each lens and coordinates the parameters between the lenses, so that the optical lens 10 can fully correct the aberration on the basis of having wide-angle and large aperture characteristics, so that the optical lens 10 has a better imaging effect and at the same time reduces the opening size of the electronic device 100.

[0228] FIG7A illustrates the structure of a camera module 1 according to a fifth embodiment of the present application.

[0229] In the fifth embodiment, the optical lens 10 includes an aperture and seven lenses. Specifically, a first lens group, a second lens group, and a third lens group are arranged in sequence from the object side to the image side. The first lens group includes a first lens L1 and a second lens L2; ​​the second lens group includes a third lens L3, a fourth lens L4, and a fifth lens L5; and the third lens group includes a sixth lens L6 and a seventh lens L7.

[0230] In this embodiment of the present application, the object-side surface of the first lens L1 is concave near the optical axis, and the image-side surface is concave near the optical axis. The object-side surface of the second lens L2 is convex near the optical axis, and the image-side surface is concave near the optical axis.

[0231] The object-side surface of the third lens L3 is convex near the optical axis, and the image-side surface is convex near the optical axis. The object-side surface of the fourth lens L4 is concave near the optical axis, and the image-side surface is concave near the optical axis. The object-side surface of the fifth lens L5 is concave near the optical axis, and the image-side surface is convex near the optical axis. The effective aperture DSn of the third lens L3, the fourth lens L4, and the fifth lens L5 in the second lens group and the entrance pupil diameter EPD of the optical lens 10 satisfy 2.5>DSn / EPD>1.1. Specifically, DS3 / EPD is 1.55, DS4 / EPD is 1.64, and DS5 / EPD is 1.79. It can be understood that the second lens group plays a core converging role, which can greatly reduce aberrations and significantly improve the imaging quality of the optical lens 10.

[0232] The object-side surface of the sixth lens element L6 is convex near the optical axis, and the image-side surface is convex near the optical axis. The object-side surface of the seventh lens element L7 is convex near the optical axis, and the image-side surface is concave near the optical axis. The effective aperture DS1 of the first lens element L1 and the effective aperture DS7 of the seventh lens element L7 satisfy the ratio DS1 / DS7 of 0.9, effectively correcting field curvature among aberrations. The effective aperture DS7 of the seventh lens element L7 and the image height ImgH of the optical lens 10 satisfy the ratio DS7 / ImgH of 1.79, effectively correcting field curvature among aberrations.

[0233] In this embodiment, the first preset lens has an Abbe number of 19.4 and includes the second lens L2 and the fifth lens L5. The second preset lens has an Abbe number of 56 and includes the first lens L1, the third lens L3, the fourth lens L4, the sixth lens L6, and the seventh lens L7. The ratio of the thickness CTH of the third lens L3 to the thickness CTL of the second lens L2 satisfies 15>CTH / CTL>1.1, effectively correcting chromatic aberration.

[0234] According to the relationship formula introduced above, the optical design parameters of the optical lens 10 in the fifth embodiment of the present application are as follows:

[0235] Table 9 Structural data of each component of the camera module 1 of the fifth embodiment

[0236] Table 10 Aspheric coefficients of the optical lens 10 of the fifth embodiment

[0237] By substituting the above parameters into the formula, each lens of the optical lens 10 of this embodiment can be designed:

[0238] Where z(x,y) is the optical surface sag; k is the cone coefficient; c is the radius of curvature; r is the radius height in the direction of the optical axis; r2=x2+y2; A i are the polynomial coefficients; r i is the normalized radial coordinate.

[0239] 7B , 7C and 7D , which illustrate the optical performance of the optical lens 10 according to the fifth embodiment.

[0240] Figure 7B shows the axial chromatic aberration of light with wavelengths of 650 nm, 610 nm, 550 nm, 510 nm, and 470 nm after passing through the optical lens 10 according to the fifth embodiment. The ordinate represents the normalized pupil coordinate, and the abscissa represents the axial chromatic aberration, both in millimeters. As can be seen from Figure 7B , in this embodiment, the axial chromatic aberration of the optical lens 10 in each state is kept within a very small range.

[0241] Figure 7C illustrates the astigmatism of light with a wavelength of 550 nm after passing through the optical lens 10 of the fifth embodiment. The solid line represents the astigmatism of the 550 nm light in the meridional direction after passing through the optical lens 10, and the dashed line represents the field curvature of the 550 nm light in the sagittal direction after passing through the optical lens 10. The ordinate represents the object angle, and the abscissa represents the astigmatism values ​​in the meridional (dashed line) and sagittal (solid line) directions, both in millimeters. As can be seen from Figure 7C , in this embodiment, the astigmatism of the optical lens 10 in various states is controlled within a very small range.

[0242] Figure 7D shows the distortion of light with a wavelength of 550 nm after passing through the optical lens 10 of the fifth embodiment. The ordinate represents the object angle, and the abscissa represents the optical distortion values ​​corresponding to different fields of view, expressed in percentages. As can be seen from Figure 7C , in this embodiment, the distortion of the optical lens 10 is kept within a very small range.

[0243] This embodiment sets the parameters of each lens and coordinates the parameters between the lenses, so that the optical lens 10 can fully correct the aberration on the basis of having wide-angle and large aperture characteristics, so that the optical lens 10 has a better imaging effect and at the same time reduces the opening size of the electronic device 100.

[0244] FIG8A illustrates the structure of a camera module 1 according to a sixth embodiment of the present application.

[0245] In the sixth embodiment, the optical lens 10 includes an aperture and seven lenses. Specifically, a first lens group, a second lens group, and a third lens group are arranged in sequence from the object side to the image side. The first lens group includes a first lens L1 and a second lens L2; ​​the second lens group includes a third lens L3, a fourth lens L4, and a fifth lens L5; and the third lens group includes a sixth lens L6 and a seventh lens L7.

[0246] In this embodiment of the present application, the object-side surface of the first lens L1 is concave near the optical axis, and the image-side surface is concave near the optical axis. The object-side surface of the second lens L2 is convex near the optical axis, and the image-side surface is concave near the optical axis.

[0247] The object-side surface of the third lens L3 is convex near the optical axis, and the image-side surface is convex near the optical axis. The object-side surface of the fourth lens L4 is convex near the optical axis, and the image-side surface is concave near the optical axis. The object-side surface of the fifth lens L5 is convex near the optical axis, and the image-side surface is convex near the optical axis. The effective aperture DSn of the third lens L3, the fourth lens L4, and the fifth lens L5 in the second lens group and the entrance pupil diameter EPD of the optical lens 10 satisfy 2.5>DSn / EPD>1.1. Specifically, DS3 / EPD is 1.36, DS4 / EPD is 1.6, and DS5 / EPD is 1.88. It can be understood that the second lens group plays a core converging role, which can greatly reduce aberrations and significantly improve the imaging quality of the optical lens 10.

[0248] The object-side surface of the sixth lens element L6 is concave near the optical axis, and the image-side surface is convex near the optical axis. The object-side surface of the seventh lens element L7 is convex near the optical axis, and the image-side surface is concave near the optical axis. The effective aperture DS1 of the first lens element L1 and the effective aperture DS7 of the seventh lens element L7 satisfy the ratio DS1 / DS7 of 0.84, effectively correcting field curvature among aberrations. The effective aperture DS7 of the seventh lens element L7 and the image height ImgH of the optical lens 10 satisfy the ratio DS7 / ImgH of 1.75, effectively correcting field curvature among aberrations.

[0249] In this embodiment, the first preset lens has an Abbe number of 19.4 and includes the second lens L2 and the fifth lens L5. The second preset lens has an Abbe number of 56 and includes the first lens L1, the third lens L3, the fourth lens L4, the sixth lens L6, and the seventh lens L7. The ratio of the thickness CTH of the third lens L3 to the thickness CTL of the second lens L2 satisfies 15>CTH / CTL>1.1, effectively correcting chromatic aberration.

[0250] According to the relationship described above, the optical design parameters of the optical lens 10 in the sixth embodiment of the present application are as follows:

[0251] Table 11 Structural data of components of the camera module 1 of the sixth embodiment

[0252] Table 12 Aspheric coefficients of the optical lens 10 of the sixth embodiment

[0253] By substituting the above parameters into the formula, each lens of the optical lens 10 of this embodiment can be designed:

[0254] Where z is the optical surface sag; k is the cone coefficient; c is the radius of curvature; r is the radius height in the direction of the optical axis; r2=x2+y2; A i are the polynomial coefficients; r i is the normalized radial coordinate.

[0255] 8B , 8C and 8D , which illustrate the optical performance of the optical lens 10 according to the sixth embodiment.

[0256] Figure 8B shows the axial chromatic aberration of light with wavelengths of 650 nm, 610 nm, 550 nm, 510 nm, and 470 nm after passing through the optical lens 10 of the sixth embodiment. The ordinate represents the normalized pupil coordinate, and the abscissa represents the axial chromatic aberration, both in millimeters. As can be seen from Figure 8B , in this embodiment, the axial chromatic aberration of the optical lens 10 in each state is kept within a very small range.

[0257] Figure 8C illustrates the astigmatism of light with a wavelength of 550 nm after passing through the optical lens 10 of the sixth embodiment. The solid line represents the astigmatism of the 550 nm light in the meridional direction after passing through the optical lens 10, and the dashed line represents the field curvature of the 550 nm light in the sagittal direction after passing through the optical lens 10. The ordinate represents the object angle, and the abscissa represents the astigmatism values ​​in the meridional (dashed line) and sagittal (solid line) directions, both in millimeters. As can be seen from Figure 8C , in this embodiment, the astigmatism of the optical lens 10 in various states is controlled within a very small range.

[0258] Figure 8D shows the distortion of light with a wavelength of 550 nm after passing through the optical lens 10 of the sixth embodiment. The ordinate represents the object angle, and the abscissa represents the optical distortion values ​​corresponding to different fields of view, expressed in percentages. As can be seen from Figure 8C , in this embodiment, the distortion of the optical lens 10 is kept within a very small range.

[0259] FIG9A illustrates the structure of a camera module 1 according to a seventh embodiment of the present application.

[0260] In the first embodiment, the optical lens 10 includes an aperture and six lenses. Specifically, a first lens group, a second lens group, and a third lens group are arranged in sequence from the object side to the image side. The first lens group includes a first lens L1 and a second lens L2, the second lens group includes a third lens L3 and a fourth lens L4, and the third lens group includes a fifth lens L5 and a sixth lens L6.

[0261] In this embodiment of the present application, the object-side surface of the first lens L1 is concave near the optical axis, and the image-side surface is concave near the optical axis. The object-side surface of the second lens L2 is convex near the optical axis, and the image-side surface is concave near the optical axis.

[0262] The object-side surface of the third lens L3 is convex near the optical axis, and the image-side surface is convex near the optical axis. The object-side surface of the fourth lens L4 is concave near the optical axis, and the image-side surface is convex near the optical axis. The effective aperture DSn of the third lens L3 and the fourth lens L4 in the second lens group and the entrance pupil diameter EPD of the optical lens 10 satisfy 2.5>DSn / EPD>1.1. Specifically, DS3 / EPD is 1.50, and DS4 / EPD is 1.71. It can be understood that the second lens group plays a core converging role, which can significantly reduce aberrations and significantly improve the imaging quality of the optical lens 10.

[0263] The object-side surface of the fifth lens element L5 is concave near the optical axis, and the image-side surface is convex near the optical axis. The object-side surface of the sixth lens element L6 is convex near the optical axis, and the image-side surface is concave near the optical axis. The effective aperture DS1 of the first lens element L1 and the effective aperture DS6 of the sixth lens element L6 satisfy the ratio DS1 / DS6 of 0.85, effectively correcting field curvature. The effective aperture DS6 of the sixth lens element L6 and the image height ImgH of the optical lens 10 satisfy the ratio DS6 / ImgH of 1.61, effectively correcting field curvature.

[0264] In this embodiment, the first preset lens has an Abbe number of 19.4 and includes the second lens L2 and the fifth lens L5. The second preset lens has an Abbe number of 56 and includes the first lens L1, the third lens L3, the fourth lens L4, and the sixth lens L6. The ratio of the thickness CTH of any of the third lens L3, the fourth lens L4, and the sixth lens L6 to the thickness CTL of the fifth lens L5 satisfies 15>CTH / CTL>1.1, effectively correcting chromatic aberration.

[0265] According to the relationship formula introduced above, the optical design parameters of the optical lens 10 in the seventh embodiment of the present application are as follows:

[0266] Table 13 Structural data of components of the camera module 1 of the seventh embodiment

[0267] Table 14 Aspheric coefficients of the optical lens 10 of the seventh embodiment

[0268] By substituting the above parameters into the formula, each lens of the optical lens 10 of this embodiment can be designed:

[0269] Where z is the optical surface sag; k is the cone coefficient; c is the radius of curvature; r is the radius height in the direction of the optical axis; r2=x2+y2; A i are the polynomial coefficients; r i is the normalized radial coordinate.

[0270] 9B , 9C and 9D , which illustrate the optical performance of the optical lens 10 according to the seventh embodiment.

[0271] Figure 9B shows the axial chromatic aberration of light with wavelengths of 650 nm, 610 nm, 550 nm, 510 nm, and 470 nm after passing through the optical lens 10 according to the seventh embodiment. The ordinate represents the normalized pupil coordinate, and the abscissa represents the axial chromatic aberration, both in millimeters. As can be seen from Figure 9B , in this embodiment, the axial chromatic aberration of the optical lens 10 in each state is kept within a very small range.

[0272] Figure 9C illustrates the astigmatism of light with a wavelength of 550 nm after passing through the optical lens 10 of the seventh embodiment. The solid line represents the astigmatism of the 550 nm light in the meridional direction after passing through the optical lens 10, and the dashed line represents the field curvature of the 550 nm light in the sagittal direction after passing through the optical lens 10. The ordinate represents the object angle, and the abscissa represents the astigmatism values ​​in the meridional (dashed line) and sagittal (solid line) directions, both in millimeters. As can be seen from Figure 9C , in this embodiment, the astigmatism of the optical lens 10 in various states is controlled within a very small range.

[0273] Figure 9D shows the distortion of light with a wavelength of 550 nm after passing through the optical lens 10 of the seventh embodiment. The ordinate represents the object angle, and the abscissa represents the optical distortion values ​​corresponding to different fields of view, expressed in percentages. As can be seen from Figure 9C , in this embodiment, the distortion of the optical lens 10 is kept within a very small range.

[0274] This embodiment sets the parameters of each lens and coordinates the parameters between the lenses, so that the optical lens 10 can fully correct the aberration on the basis of having wide-angle and large aperture characteristics, so that the optical lens 10 has a better imaging effect and at the same time reduces the opening size of the electronic device 100.

[0275] The following table shows the basic parameters of the optical lens 10 in the above seven specific embodiments.

[0276] Table 15 Basic parameters of the optical lens 10 of the first to seventh embodiments

[0277] Here, one to seven refer to the first to seventh embodiments.

[0278] As shown in the above table, in the first to seventh embodiments, the ratios TTL of the lens height TTL of the optical lens 10 to the focal length EFL of the optical lens are 4.27, 4.87, 4.62, 4.63, 3.29, 3.10, and 3.16, respectively, so that the optical lens 10 has a reasonable physical length, which is sufficient to place a lens for correcting aberrations. The half field of view HFOV of the optical lens 10 is 62, 58.00, 61, 63, 61, 62, and 60, respectively, which can achieve wide angle or ultra-wide angle. The aperture values ​​F of the optical lens 10 are 1.0, 1.0, 1.0, 1.0, 1.4, 1.2, and 1.8, respectively, which can achieve a large aperture.

[0279] The first lens L1 has a negative optical power and an Abbe number Vd1 of 56, which causes the first lens L1 to diverge light and increase the field of view of the first lens L1. In the first to seventh embodiments, the ratio DS1 / EFL of the effective aperture DS1 of the first lens L1 to the focal length EFL of the optical lens 10 is 3.10, 2.73, 2.85, 2.31, 2.63, 2.37, and 2.23, respectively. This can reduce the aperture size of the electronic device 100 corresponding to the optical lens 10.

[0280] In the seven embodiments described above, the effective aperture DS1 of the first lens L1 and the half field of view HFOV of the optical lens 10 satisfy DS1+2*tan(HFOV) of 10.36, 8.52, 9.17, 8.87, 9.29, 8.88, and 8.26, respectively. This can reduce the aperture size of the electronic device 100 corresponding to the optical lens 10. The ratio SI1 / SOC1 of the image-side sag height SI1 of the first lens L1 to the object-side inflection point sag height SOC1 of the first lens L1 is 16.67, 10.00, 8.50, 17.38, 9.48, 7.97, and 14.00, respectively. That is, the optical lens 10 can adopt an aspherical surface, thereby reducing the lens height of the optical lens 10.

[0281] In the above seven embodiments, the ratios SO3 / SI3 of the object-side sag SO3 to the image-side sag SI3 of the third lens element L3 are 0.38, 0.13, 0.32, 0.09, 0.16, 0.10, and 0.51, respectively, which can effectively correct astigmatism in the aberrations.

[0282] In the seven embodiments described above, the effective aperture DSn of each lens in the second lens group and the entrance pupil diameter EPD of the optical lens 10 all satisfy the relationship 2.5 > DSn / EPD > 1.1. Taking the third embodiment as an example, DS3 / EPD is 1.78, DS4 / EPD is 2, and DS5 / EPD is 2.29. It can be understood that the second lens group acts as a core convergence, significantly reducing aberrations and significantly improving the imaging quality of the optical lens 10.

[0283] In the seven embodiments described above, the ratios DS1 / DS7 of the effective aperture DS1 of the first lens L1 to the effective aperture DSi of the last lens L1 are 1.02, 1.00, 1.01, 0.77, 0.90, 0.84, and 0.85, respectively, which effectively correct for field curvature among aberrations. The ratios DS7 / ImgH of the effective aperture DSi of the last lens L1 to the image height ImgH of the optical lens system 10 are 1.85, 1.66, 1.73, 1.82, 1.79, 1.75, and 1.61, respectively, which effectively correct for field curvature among aberrations.

[0284] In the embodiment of the present application, the ratio of the thickness CTH of at least one second preset lens to the thickness CTL of at least one first preset lens L2 satisfies 15>CTH / CTL>1.1. For example, in the first embodiment, CTH3 / CTL6 is 4.26, which can effectively correct chromatic aberration in aberrations.

[0285] This embodiment sets the parameters of each lens and coordinates the parameters between the lenses, so that the optical lens 10 can fully correct the aberration on the basis of having wide-angle and large aperture characteristics, so that the optical lens 10 has a better imaging effect and at the same time reduces the opening size of the electronic device 100.

[0286] Correspondingly, an embodiment of the present application also provides an electronic device, including a shell, a processor and the above-mentioned camera module, the camera module is arranged on the front and / or back of the shell, the camera module is used to transmit image data to the processor, and the processor is used to process the image data.

[0287] In the accompanying drawings, some structural or method features may be shown in a particular arrangement and / or order. However, it should be understood that such a particular arrangement and / or order is not required. Rather, in some embodiments, these features may be illustrated in a manner and / or order different from that shown in the illustrative drawings. In addition, the inclusion of structural or method features in a particular drawing does not mean that all embodiments need to include such features. In some embodiments, these features may not be included, or they may be combined with other features.

[0288] The embodiments of the present application are described in detail above with reference to the accompanying drawings. However, the application of the technical solution of the present application is not limited to the various applications mentioned in the embodiments of the present patent. Various structures and variations can be easily implemented with reference to the technical solution of the present application to achieve the various beneficial effects mentioned herein. Various changes made within the knowledge of ordinary technicians in this field without departing from the purpose of the present application should fall within the scope of coverage of the patent application.

Claims

1. An optical lens, characterized in that: The optical lens comprises a first lens group, a second lens group and a third lens group arranged in sequence from the object side to the image side; The effective aperture DSn of at least one lens in the second lens group and the entrance pupil diameter EPD of the optical lens satisfy 2.5>DSn / EPD>1.1; The first lens in the first lens group close to the object side has negative optical power, and the Abbe number Vd1 of the first lens satisfies Vd1>40.

2. An optical lens according to claim 1, characterized in that: The first lens group includes two lenses, the second lens group includes two lenses, and the third lens group includes one lens.

3. An optical lens according to claim 1, characterized in that: A lens height TTL of the optical lens and a focal length EFL of the optical lens satisfy TTL / EFL>2.

4. An optical lens according to claim 1, characterized in that: There is at least one lens in the second lens group whose object-side sag height SOn and image-side sag height SIn satisfy SOn / SIn<1.

5. The optical lens according to claim 1, characterized in that: The effective aperture DS1 of the first lens and the effective aperture DSi of the i-th lens closest to the image side in the third lens group satisfy 5>DS1 / DSi>0.

5.

6. The optical lens according to claim 1, characterized in that: The effective aperture DSi of the i-th lens closest to the image side in the third lens group and the image height ImgH of the optical lens satisfy 2>DSi / ImgH>0.

5.

7. The optical lens according to claim 1, characterized in that: The optical lens comprises at least two first preset lenses, and the Abbe number of the first preset lenses is lower than 30.

8. An optical lens according to claim 7, characterized in that: The optical lens comprises a plurality of second preset lenses, wherein the Abbe number of the second preset lenses is higher than 55. A thickness CTH of at least one of the second preset lenses and a thickness CTL of at least one of the first preset lenses satisfy 15>CTH / CTL>1.

1.

9. The optical lens according to claim 1, characterized in that: The effective aperture DS1 of the first lens and the focal length EFL of the optical lens satisfy 16>DS1 / EFL>1.

5.

10. The optical lens according to claim 1, characterized in that: The effective aperture DS1 of the first lens and the half field of view HFOV of the optical lens satisfy 25>DS1+2*tan(HFOV)>3.

11. The optical lens according to claim 1, characterized in that: The image side sag height SI1 of the first lens and the object side inflection point sag height SOC1 of the first lens satisfy SI1 / SOC1>2.

12. An optical lens according to any one of claims 1 to 11, characterized in that: The half field of view HFOV of the optical lens satisfies 85°>HFOV>45°.

13. An optical lens according to any one of claims 1 to 11, characterized in that: The aperture value F of the optical lens satisfies F<1.

9.

14. A camera module, characterized in that: It comprises a photosensitive element and an optical lens as described in any one of claims 1 to 13, wherein the photosensitive element is located on the image side of the optical lens, and the optical lens is used to image light onto the photosensitive element.

15. An electronic device, characterized in that: Including the camera module described in claim 14.

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