Lens module and electronic equipment

Abstract

The utility model provides a lens module and electronic equipment, and the lens module comprises a housing, a lens group comprising at least four lenses, a reflection part, and an image sensor, and the lens group, the reflection part, and the image sensor are disposed in the housing. The lens group comprises a first lens and a second lens, the first lens and the second lens are located at the two opposite ends of the lens group in the axial direction of the lens group, and at least one aspheric surface type exists from the object side face of the first lens to the image side face of the second lens. The image sensor is inclined relative to the first direction. Through the design, the structure of the lens module can be more compact, so that the size of the lens module and the space occupied by the lens module in the electronic equipment can be reduced, and actual use requirements are better met.

Description

Technical Field

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

[0002] Existing electronic devices are usually equipped with a telephoto camera module for capturing images. The telephoto camera module has high definition at long distances, but the telephoto camera module is relatively long in total length and relatively large in size. When the telephoto camera module is applied to an electronic device, it will occupy a relatively large space, resulting in a larger overall size of the electronic device. Utility Model Content

[0003] The present application provides a lens module and an electronic device, which are used to reduce the volume of the lens module.

[0004] The present application provides a lens module, the lens module comprising:

[0005] case;

[0006] A lens group, which is mounted on the housing and includes at least four lenses;

[0007] A reflector, which is mounted on the housing and is used to reflect the light transmitted by the lens group;

[0008] An image sensor, the image sensor being mounted on the housing and configured to receive the light reflected by the reflector;

[0009] Wherein, the lens group includes a first lens and a second lens. Along the axial direction of the lens group, the first lens and the second lens are located at opposite ends of the lens group. There is at least one aspherical surface from the object side of the first lens to the image side of the second lens. The lenses of the lens group are arranged in sequence along a first direction, and the image sensor is arranged tilted relative to the first direction.

[0010] In the solution provided by the embodiment of the present application, by increasing the number of lenses, the adjustment and optimization quality of the lens group for light can be improved, so as to facilitate the optimization of the imaging quality and thus improve the clarity of the imaging. The reflector is used to extend the propagation distance of the light by emitting, so as to extend the optical path and improve the focal length, so as to improve the imaging distance of the lens module. The image sensor is tilted relative to the first direction, and the space occupied by the image sensor in the first direction can be reduced without changing the volume of the image sensor, that is, by tilting the image sensor, a larger image sensor can be set in the same space in the first direction, so that the photosensitive area of ​​the image sensor can be increased, and then the amount of light entering can be increased, so as to improve the shooting quality of scenes such as night scenes, dark light, and backlight. In the solution provided by the embodiment of the present application, the reflector can be used to increase the focal length, and the image sensor is tilted relative to the first direction, so that a larger image sensor can be set in the same size space, so that the structure of the lens module is more compact, so that the volume of the lens module can be reduced while increasing the photosensitive area of ​​the image sensor, and then the space occupied by the lens module in the electronic device can be reduced to adapt to the trend of miniaturization and compactness of electronic devices.

[0011] In a possible implementation manner, the total effective focal length of the lens module is F1, and F1 satisfies: F1>40 mm.

[0012] By increasing the total effective focal length of the lens module, the imaging distance of the lens module can be increased, the details of the subject located at a farther distance can be better captured, and the shooting clarity and quality can be improved.

[0013] In a possible implementation, an angle between the image sensor and the first direction is a, and 22°≤a≤37°.

[0014] When the angle between the image sensor and the first direction is small, the image sensor occupies a large space in the first direction, resulting in a large overall volume of the lens module, and the lens module occupies a large space in the electronic device. When the angle between the image sensor and the first direction is small, the tilt angle of the image sensor is in the range of 22° to 37°, and the position of the image sensor can be adjusted, thereby adjusting the propagation path of the light, so that the number of reflections of the light in the reflector is reduced.

[0015] In a possible implementation, half of the diagonal length of the effective pixel area of ​​the imaging surface of the image sensor is b, and 3 mm ≤ b ≤ 4.25 mm.

[0016] By tilting the image sensor relative to the first direction, a larger image sensor can be set while occupying the same space in the first direction, thereby increasing the effective pixel area of ​​the image sensor, thereby improving the shooting quality of the lens module for night scenes, dark light, backlight and other scenes. The structure of the lens module can be more compact while improving the imaging quality of the lens module, which is more in line with actual usage needs.

[0017] In a possible implementation manner, the lens group includes four lenses.

[0018] By setting four lenses, the number of lenses in the lens group can be reduced while optimizing the light, thereby reducing the volume of the lens group. The ImgH of the image sensor can be 4.25 mm. The image sensor has a large photosensitive area and a high amount of light entering, which is conducive to improving the shooting quality of night scenes, dark light, and backlit scenes.

[0019] In a possible implementation, the lens group includes five lenses, and along the first direction, the size of the lens module is 3 mm to 6 mm.

[0020] By setting five lenses, it is helpful to improve the optimization effect of the lens group on light and improve the shooting quality. The quantitative cost-effectiveness of the lenses and the optimized surface shape of each lens are also increased, which can increase the half field of view angle and aperture value while achieving a long focal length, so as to meet the shooting requirements of large angles and large amounts of light. The size of the lens module in the range of 3 mm to 5 mm can enable the lens module to have a better optimization effect on light while occupying less space. The first direction is usually parallel to the thickness direction of the electronic device. Therefore, reducing the size of the lens module in the first direction can reduce the space occupied by the lens module in the thickness direction of the electronic device, which is conducive to the miniaturization and thinness of the electronic device, and is more in line with actual usage needs.

[0021] In a possible implementation, the half field of view angle of the lens group is d, and 10 degrees ≤ d ≤ 16 degrees.

[0022] The solution provided in the embodiment of the present application can increase the half field of view angle. The larger the half field of view angle is, the more light emitted by the object will be gathered, which also means a greater luminous flux.

[0023] In a possible implementation, the aperture value of the lens module is e, 1≤e≤3.5.

[0024] The amount of light entering the lens assembly can be controlled by setting the aperture value of the lens assembly to a range of 1 to 3.5.

[0025] In a possible embodiment, the reflector includes at least an incident surface, a first reflecting surface, a second reflecting surface, a third reflecting surface and an exit surface, the incident surface is used to receive light, the reflector is used to reflect the light from the incident surface to the second reflecting surface, the second reflecting surface is used to reflect the light to the third reflecting surface, and the third reflecting surface is used to reflect the light to the exit surface.

[0026] Through such a design, the light can be reflected multiple times in the reflector, which is conducive to extending the light path. In the same space, the more times the light is reflected in the reflector, the longer the light path of the lens module is, and the longer the light path is, the longer the focal length of the lens module is. Through multiple reflections of light, a longer light path can be set in the same space, so that the space of the lens module is more compact, thereby reducing the space occupied by the lens module in the electronic device, which is more in line with actual usage needs.

[0027] In a possible implementation, the included angle between the second reflection surface and the incident surface is β, the effective diameter of the incident surface is h, and 0.2≤|tanβ| / h≤0.3 is satisfied.

[0028] By setting |tanβ| / h in the range of 0.2 to 0.3, the edge incident light can still be reflected from the first reflective surface to the second reflective surface and the third reflective surface, achieving the total reflection phenomenon and the Mazu light folding condition. If the ratio of |tanβ| / h is too large, the light cannot be reflected, and if the ratio of |tanβ| / h is too small, stray light will be introduced, affecting the shooting quality.

[0029] In a possible implementation, the effective diameter of the incident surface is h, the maximum effective diameter of the second lens is D2, and 1.0≤h / D2≤1.5 is satisfied.

[0030] By making the ratio of the effective diameter of the incident surface to the maximum effective diameter of the second lens within the range of 1.0 to 1.5, it is advantageous for large-angle incident light to be effectively shrunk by the second lens after passing through the first lens, which is beneficial for all light to enter the first reflection surface and be reflected.

[0031] In a possible implementation, the reflector is a parallelogram prism.

[0032] A parallelogram prism can reflect light multiple times, which helps to extend the optical path and focal length. Compared with the solution of using multiple prisms, the relative positions of multiple prisms need to be adjusted, and the positioning accuracy between the components is required to be high. Using a parallelogram prism can achieve multiple reflections, is simple to install, and has relatively low positioning accuracy requirements between the components, which is more in line with actual usage needs.

[0033] In a possible implementation, along a direction perpendicular to the emission surface, the size of the lens module is H, the maximum effective diameter of the first lens is D1, and the following relationship is satisfied: 2.5<H / D1<3.5.

[0034] By setting H / D1 in the range of 2.5 to 3.5, it can be used to constrain the relationship between the spatial occupancy of the lens group and the incident space, so that the lens module can have a larger amount of light entering while also shrinking the occupied space.

[0035] In a possible implementation, the lens group and the image sensor are located on the same side of the reflective element.

[0036] Such a design can reduce the size of the lens module along the first direction, which is beneficial to reducing the volume of the lens module. When the lens module is applied to electronic devices, the space occupied by the lens module in the electronic device can be reduced, thereby complying with the trend of electronic devices becoming lighter and smaller, and more in line with actual usage needs.

[0037] In a possible implementation, the equivalent distance in air of the path of light propagating from the object side of the lens group to the imaging surface of the image sensor is TL, the distance from the object side of the lens group to the imaging surface of the image sensor in the normal direction of the imaging surface of the image sensor is T, and TL and T satisfy 3.0<TL / T<4.0.

[0038] By setting TL / T in the range of 3.0 to 4.0, the effective optical path can be guaranteed, and the beneficial effects of long effective focal length and short space occupation can be achieved. If the TL / T ratio is too small, the long focal length effect will be affected, or even the long focal length cannot be achieved. If the TL / T ratio is too large, the reflection will be affected, resulting in the failure to meet the conditions for total reflection.

[0039] In a possible implementation, the distance from the object side of the lens group to the imaging surface of the image sensor in the normal direction of the imaging surface of the image sensor is T, the total effective focal length of the lens module is F1, and T and F1 satisfy T / F1<0.6.

[0040] By making T / F1 less than 0.6, the overall length of the lens module can be guaranteed while the lens module has a higher magnification.

[0041] In a possible implementation, the total effective focal length F1 of the lens module and the effective focal length f1 of the first lens satisfy 3.0<F1 / f1<4.0, and the total effective focal length F1 of the lens module and the effective focal length f2 of the second lens satisfy -3.5<F1 / f2<-3.0.

[0042] By making F1 / f1 in the range of 3.0 to 4.0 and F1 / f2 in the range of -3.5 to -3.0, the effective focal length of the first lens 21 and the second lens 22 can be reasonably controlled, and the spherical aberration produced by the rear lens group can be effectively corrected, which is beneficial to improving the resolution of the lens module and making the lens module phase difference reach a reasonably balanced state.

[0043] In a possible implementation, the ratio of the entrance pupil diameter of the lens module to half the diagonal length of the effective pixel area on the imaging surface of the lens module is m, and 2.0<m<3.0.

[0044] By making the EPD / ImgH ratio within the range of 2.0 to 3.0, the ratio of the field of view angle to the half image height can be limited to a reasonable range, which is beneficial to realizing the telephoto feature of the lens module. At the same time, it can match chips with higher pixels, which is beneficial to achieving high-definition shooting.

[0045] In a possible implementation, the refractive index of the first lens is N1, the refractive index of the second lens is N2, and 1.65<(N1+N2) / 2<1.8.

[0046] By making (N1+N2) / 2 in the range of 1.65 to 1.8, the refractive power of the lens can be configured more reasonably, which can effectively correct the spherical aberration of the rear lens group, which is beneficial to improving the resolution of the optical system and making the optical system reach a reasonably balanced state.

[0047] In a possible implementation, the shell includes a second shell of the first shell, the lens group is installed on the first shell, the image sensor is installed on the second shell, the incident end of the reflector is installed on the first shell, and the output end of the reflector is installed on the second shell.

[0048] In this way, the position of each component can be restricted by the shell, and the assembly process is relatively simple. The lens module can be assembled into a side module in advance, and then the lens module can be installed as a whole to the electronic device, which is conducive to improving processing efficiency.

[0049] The present application also provides an electronic device, which includes the lens module described in any one of the above items.

[0050] The present application provides a lens module and an electronic device, wherein the lens module includes a housing, a lens group including at least four lenses, a reflector and an image sensor, and the lens group, the reflector and the image sensor are mounted on the housing. The lens group includes a first lens and a second lens, and along the axial direction of the lens group, the first lens and the second lens are located at opposite ends of the lens group, and there is at least one aspherical surface from the object side of the first lens to the image side of the second lens. The image sensor is tilted relative to the first direction. Such a design can make the structure of the lens module more compact, which is conducive to reducing the volume of the lens module and the space occupied by the lens module in the electronic device, and is more in line with actual usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A schematic diagram of the lens module provided in this application;

[0052] Figure 2 A schematic diagram of the lens assembly, reflector and image sensor provided in this application;

[0053] Figure 3 A schematic diagram of an electronic device provided in this application.

[0054] Reference numerals

[0055] 1-shell, 11-first shell, 12-second shell; 2-lens group, 21-first lens, 22-second lens; 3-reflector, 31-incident surface, 32-first reflection surface, 33-second reflection surface, 34-third reflection surface, 35-exit surface; 4-image sensor; 5-filter; 6-lens module. DETAILED DESCRIPTION

[0056] With the development of technology, electronic devices such as mobile phones, home appliances, security equipment, and vehicle-mounted equipment are all equipped with telephoto camera modules. The telephoto camera module has a higher definition at long distances, but the total length of the telephoto camera module is long and the volume is large. When the telephoto camera module is used in electronic devices, it will take up a large space. Taking mobile phones, tablet computers, and laptop computers as an example, when the telephoto camera module is used in mobile phones, tablet computers, and laptop computers, it will take up a large space in the thickness direction of the electronic device.

[0057] In view of this, an embodiment of the present application provides a lens module and an electronic device for reducing the volume of the lens module.

[0058] like Figure 1As shown, an embodiment of the present application provides a lens module 6, which includes a housing 1, a lens group 2 including at least four lenses, a reflector 3 and an image sensor 4, wherein the reflector 3 can be a prism and the image sensor 4 can be a charged coupled device (CCD). The lens group 2, the reflector 3 and the image sensor 4 are installed in the housing 1. The lens group 2 is used to adjust and optimize the incident light. The light is transferred to the reflector 3 after adjustment and optimization by the lens group 2. The reflector 3 is used to reflect the light and transfer the light to the image sensor 4 after at least one reflection. The reflector 3 is used to extend the optical path. The image sensor 4 is used to receive light and form an image. The lens group 2 includes a first lens 21 and a second lens 22. Along the axial direction of the lens group 2, the first lens 21 and the second lens 22 are located at opposite ends of the lens group 2, and the remaining lenses are located between the first lens 21 and the second lens 22. The light enters the lens group 2 from the side where the first lens 21 is located, and leaves the lens group 2 from the side where the second lens 22 is located. There is at least one aspherical surface from the object side of the first lens 21 to the image side of the second lens 22. The first direction is parallel to the axial direction of the lens group 2. When the lens module 6 is applied to an electronic device, the first direction is usually parallel to the thickness direction of the electronic device. The lenses are arranged in sequence along the first direction. The number of lenses can be four, five, six, seven or more. Along the optical path of the lens module 6, the reflector 3 is located between the lens group 2 and the image sensor 4. The image sensor 4 is arranged tilted relative to the first direction.

[0059] In the solution provided in the embodiment of the present application, the adjustment and optimization quality of the lens group 2 for light can be improved by increasing the number of lenses, so as to optimize the imaging quality and improve the clarity of the imaging. The reflector 3 is used to extend the propagation distance of the light by reflection, which is conducive to extending the optical path, improving the focal length, and improving the imaging distance of the lens module 6. The image sensor 4 is tilted relative to the first direction, so that the space occupied by the image sensor 4 in the first direction can be reduced while the volume of the image sensor 4 remains unchanged, that is, by tilting the image sensor 4, a larger image sensor 4 can be set in the same space in the first direction, so that the photosensitive area of ​​the image sensor 4 can be increased, and then the amount of light entering can be increased, thereby improving the shooting quality of scenes such as night scenes, dark light, and backlight.

[0060] In the solution provided in the embodiment of the present application, the reflector 3 can be used to increase the focal length, and the image sensor 4 can be tilted relative to the first direction. A larger image sensor 4 can be arranged in the same size space, making the structure of the lens module 6 more compact, thereby increasing the photosensitive area of ​​the image sensor 4 while reducing the volume of the lens module 6, thereby reducing the space occupied by the lens module 6 in the electronic device, so as to adapt to the trend of miniaturization and compactness of electronic equipment.

[0061] In a possible implementation manner, the total effective focal length of the lens module 6 is F1, and F1 satisfies F1>40 mm.

[0062] By increasing the total effective focal length of the lens module 6, the imaging distance of the lens module 6 can be increased, and the details of the subject located at a farther position can be better captured, thereby improving the shooting clarity and shooting quality.

[0063] In a possible implementation manner, the angle between the image sensor 4 and the first direction is a, and 22°≤a≤37°.

[0064] The angle between the image sensor 4 and the first direction can be 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, etc. When the angle between the image sensor 4 and the first direction is small, the space occupied by the image sensor 4 in the first direction is large, resulting in a larger overall volume of the lens module 6, and the lens module 6 occupies a larger space in the electronic device. When the angle between the image sensor 4 and the first direction is large, it will affect the optical path and the imaging quality. The tilt angle of the image sensor 4 is in the range of 22° to 37°, and the position of the image sensor 4 can be adjusted, thereby adjusting the propagation path of the light and the number of reflections of the light in the reflector 3.

[0065] In a possible implementation manner, a size of half the diagonal length (half image height, ImgH) of an effective pixel area of ​​an imaging surface of the image sensor 4 is b and 3 mm ≤ b ≤ 4.25 mm.

[0066] Half of the diagonal length of the effective pixel area of ​​the imaging surface of the image sensor 4 can be 3.00 mm, 3.05 mm, 3.10 mm, 3.15 mm, 3.20 mm, 3.25 mm, 3.30 mm, 3.35 mm, 3.40 mm, 3.45 mm, 3.50 mm, 3.55 mm, 3.60 mm, 3.65 mm, 3.70 mm, 3.75 mm, 3.80 mm, 3.85 mm, 3.90 mm, 3.95 mm, 4.00 mm, 4.05 mm, 4.10 mm, 4.15 mm, 4.20 mm, 4.25 mm, etc.

[0067] By tilting the image sensor 4 relative to the first direction, a larger image sensor 4 can be set while occupying the same space in the first direction, thereby increasing the effective pixel area of ​​the image sensor 4, thereby improving the shooting quality of the lens module 6 for night scenes, dim light, backlight and other scenes, thereby making the structure of the lens module 6 more compact and improving the imaging quality of the lens module 6, which is more in line with actual usage requirements.

[0068] In a possible implementation, the lens group 2 includes four lenses.

[0069] By setting four lenses, the number of lenses of the lens group 2 can be reduced while optimizing the light, thereby reducing the volume of the lens group 2. The ImgH of the image sensor 4 can be 4.25 mm, and the image sensor 4 has a large photosensitive area and a high amount of light entering, which is conducive to improving the shooting quality of night scenes, dark light, and backlit scenes.

[0070] In a possible implementation, the lens group 2 includes five lenses, and along the first direction, the size of the lens module 6 is 3 mm to 6 mm.

[0071] The size of the lens module 6 along the first direction can be 3.0 mm, 3.2 mm, 3.4 mm, 3.6 mm, 3.8 mm, 4.0 mm, 4.2 mm, 4.4 mm, 4.6 mm, 4.8 mm, 5.0 mm, 5.2 mm, 5.4 mm, 5.6 mm, 5.8 mm, 6.0 mm, etc.

[0072] By setting five lenses, it is helpful to improve the optimization effect of lens group 2 on light and improve the shooting quality. As the number of lenses increases, the surface type that can be optimized for each lens also increases, and the half field of view angle and aperture value can be increased while achieving a long focal length, so as to meet the shooting requirements of large angles and large amounts of light entering. The size of the lens module 6 is in the range of 3 mm to 5 mm, so that the lens module 6 can have a good optimization effect on light while occupying less space. The first direction is usually parallel to the thickness direction of the electronic device. Therefore, reducing the size of the lens module 6 in the first direction can reduce the space occupied by the lens module 6 in the thickness direction of the electronic device, thereby facilitating the miniaturization and thinness of the electronic device, which is more in line with actual use requirements.

[0073] In a possible implementation manner, a half field of view (HFOV) of the lens group 2 is d, and 10 degrees ≤ d ≤ 16 degrees.

[0074] The solution provided in the embodiment of the present application can increase the half field of view angle. The larger the half field of view angle is, the more light emitted by the object will be gathered, which also means a greater luminous flux.

[0075] In a possible implementation manner, the aperture value (F number, FNO) of the lens module 6 is e and 1≤e≤3.5.

[0076] The amount of light entering the lens assembly can be controlled by setting the aperture value of the lens assembly to a range of 1 to 3.5.

[0077] The solution provided in the embodiment of the present application can achieve a long focal length while meeting the shooting requirements of large angles and large amounts of light input by improving the half field of view angle and aperture value, which is beneficial to improving the shooting quality and is more in line with actual usage needs.

[0078] like Figure 1 As shown, in a possible embodiment, the reflector 3 at least includes an incident surface 31, a first reflecting surface 32, a second reflecting surface 33, a third reflecting surface 34 and an exit surface 35. The incident surface 31 is used to receive the light transmitted by the lens group 2, and the reflector 3 is used to reflect the light from the incident surface 31 to the second reflecting surface 33, the second reflecting surface 33 is used to reflect the light to the third reflecting surface 34, and the third reflecting surface 34 is used to reflect the light to the exit surface 35. The light is emitted from the exit surface 35 of the reflector 3 and is transmitted to the image sensor 4.

[0079] Through such a design, the light can be reflected multiple times in the reflector 3, which is conducive to extending the optical path. In the same space, the more times the light is reflected in the reflector 3, the longer the optical path of the lens module 6 is, and the longer the optical path is, the longer the focal length of the lens module 6 is. Through multiple reflections of the light, a longer optical path can be set in the same space, so that the space of the lens module 6 is more compact, thereby reducing the space occupied by the lens module 6 in the electronic device, which is more in line with actual use requirements.

[0080] In a possible implementation manner, the included angle between the second reflection surface 33 and the incident surface 31 is β, the effective diameter of the incident surface 31 is h, and 0.2≤|tanβ| / h≤0.3 is satisfied.

[0081] The value of |tanβ| / h can be 0.20, 0.21, 0.22, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, 0.29, 0.30, etc.

[0082] By setting |tanβ| / h in the range of 0.2 to 0.3, the edge incident light can still be reflected by the first reflection surface 32 to the second reflection surface 33 and the third reflection surface 34, and then undergo total reflection, thus satisfying the light folding condition. If the ratio of |tanβ| / h is too large, the light cannot be reflected, and if the ratio of |tanβ| / h is too small, stray light will be introduced, affecting the shooting quality.

[0083] In a possible implementation manner, the effective diameter of the incident surface 31 is h, the maximum effective diameter of the second lens 22 is D2, and 1.0≤h / D2≤1.5.

[0084] By making the ratio of the effective diameter of the incident surface 31 to the maximum effective diameter of the second lens 22 within the range of 1.0 to 1.5, it is advantageous for large-angle incident light to be effectively contracted by the second lens 22 after passing through the first lens 21, which is beneficial for all light to enter the first reflection surface 32 and be reflected.

[0085] like Figure 1 As shown, in a possible implementation manner, the reflector 3 may be a parallelogram prism, and the incident surface 31 and the second reflective surface 33 may be located on the same side.

[0086] A parallelogram prism can reflect light multiple times, which helps to extend the optical path and focal length. Compared with the solution of using multiple prisms, the relative positions of multiple prisms need to be adjusted, and the positioning accuracy between the components is required to be high. Using a parallelogram prism can achieve multiple reflections, is simple to install, and has relatively low positioning accuracy requirements between the components, which is more in line with actual usage needs.

[0087] In a possible implementation, the incident surface 31 and the second reflective surface 33 may be surfaces on the same side of the parallelogram prism, which may be the surface of the parallelogram prism on the side facing the lens group 2, with part of the surface serving as the incident surface 31 and part of the surface serving as the so-called second reflective surface 33.

[0088] The first reflection surface 32 is coated with a reflection layer. The light enters the reflection element 3 along the incident surface 31 , is reflected by the reflection layer of the first reflection surface 32 , is totally reflected by the second reflection surface 33 and the third reflection surface 34 , and then is emitted from the exit surface 35 to reach the image sensor 4 .

[0089] In a possible implementation, along a direction perpendicular to the emission surface 35 , the size of the lens module 6 is H, the maximum effective diameter of the first lens 21 is D1 , and 2.5<H / D1<3.5.

[0090] By setting H / D1 in the range of 2.5 to 3.5, it is possible to constrain the relationship between the space occupation of the lens group 2 and the incident space, so that the lens module 6 can have a larger amount of light entering while reducing the occupied space.

[0091] like Figure 1 As shown, in a possible implementation manner, the lens group 2 and the image sensor 4 are located on the same side of the reflector 3 .

[0092] Such a design can reduce the size of the lens module 6 along the first direction, which is beneficial to reducing the volume of the lens module 6. When the lens module 6 is applied to an electronic device, the space occupied by the lens module 6 in the electronic device can be reduced, thereby complying with the trend of electronic devices becoming lighter and smaller, and more in line with actual usage needs.

[0093] In a possible implementation, the equivalent distance in air of the path of light propagating from the object side of the lens group 2 to the imaging surface of the image sensor 4 is TL, the distance from the object side of the lens group 2 to the imaging surface of the image sensor 4 in the normal direction of the imaging surface of the image sensor 4 is T, and TL and T satisfy 3.0<TL / T<4.0.

[0094] By setting TL / T in the range of 3.0 to 4.0, the effective optical path can be guaranteed, and the beneficial effects of long effective focal length and short space occupation can be achieved. If the TL / T ratio is too small, the long focal length effect will be affected, or even the long focal length cannot be achieved. If the TL / T ratio is too large, the reflection will be affected, resulting in the failure to meet the conditions for total reflection.

[0095] In a possible implementation, the distance from the object side of the lens group 2 to the imaging surface of the image sensor 4 in the normal direction of the imaging surface of the image sensor 4 is T, the total effective focal length of the lens module 6 is F1, and T and F1 satisfy T / F1<0.6.

[0096] By making T / F1 less than 0.6, the overall length of the lens module 6 can be guaranteed while the lens module 6 has a higher magnification.

[0097] In a possible implementation, the total effective focal length F1 of the lens module 6 and the effective focal length f1 of the first lens 21 satisfy 3.0<F1 / f1<4.0. The total effective focal length F1 of the lens module 6 and the effective focal length f2 of the second lens 22 satisfy -3.5<F1 / f2<-3.0.

[0098] By making F1 / f1 in the range of 3.0 to 4.0 and F1 / f2 in the range of -3.5 to -3.0, the effective focal length of the first lens 21 and the second lens 22 can be reasonably controlled, and the spherical aberration produced by the rear lens group can be effectively corrected, which is beneficial to improving the resolution of the lens module 6 and making the phase difference of the lens module 6 reach a reasonably balanced state.

[0099] In a possible implementation, the ratio of the entrance pupil diameter (EPD) of the lens module 6 to half the object length (ImgH) of the effective pixel area on the imaging surface of the lens module 6 is m, and 2.0<m<3.0.

[0100] By making the ratio of EPD / ImgH within the range of 2.0 to 3.0, the ratio of the field of view angle to the half image height can be limited within a reasonable range, which is conducive to realizing the telephoto feature of the lens module 6. At the same time, it can match chips with higher pixels, which is conducive to realizing high-definition shooting.

[0101] In a possible implementation, the refractive index of the first lens 21 is N1, the refractive index of the second lens 22 is N2, and 1.65<(N1+N2) / 2<1.8.

[0102] By making (N1+N2) / 2 in the range of 1.65 to 1.8, the refractive power of the lens can be configured more reasonably, which can effectively correct the spherical aberration of the rear lens group, which is beneficial to improving the resolution of the optical system and making the optical system reach a reasonably balanced state.

[0103] like Figure 1 As shown, in a possible embodiment, the shell 1 includes a first shell 11 and a second shell 12, the lens group 2 is installed on the first shell 11, the image sensor 4 is installed on the second shell 12, the incident end of the reflector 3 is installed on the first shell 11, and the output end of the reflector 3 is installed on the second shell 12.

[0104] In this way, the positions of various components can be restricted by the shell 1, and the process is relatively simple during assembly. The lens module 6 can be assembled into a side module in advance, and then the lens module 6 can be installed as a whole to the electronic device, which is beneficial to improving processing efficiency.

[0105] like Figure 2 As shown, in a possible implementation, the lens module 6 further includes a filter 5, which is located between the reflector 3 and the image sensor 4 and is used for filtering light to improve the shooting quality. The filter 5 may be an infrared filter 5.

[0106] like Figure 3 As shown, based on the lens module 6 provided in the above embodiments, the embodiment of the present application also provides an electronic device, which can be a mobile phone, a tablet computer, a laptop computer, etc., or can be an electronic device with a camera and shooting function such as a home appliance, a vehicle-mounted device, and a security device. The electronic device includes a lens module 6, and the lens module 6 can be the lens module 6 involved in any of the above embodiments. Since the lens module 6 has the above technical effects, the electronic device including the lens module 6 also has the corresponding technical effects, which will not be repeated here.

[0107] The embodiment of the present application provides a lens module 6 and an electronic device, wherein the lens module 6 includes a housing 1, a lens group 2 including a lens group 2 of at least four lenses, a reflector 3 and an image sensor 4, and the lens group 2, the reflector 3 and the image sensor 4 are installed on the housing 1. The lens group 2 includes a first lens 21 and a second lens 22, and along the axial direction of the lens group 2, the first lens 21 and the second lens 22 are located at opposite ends of the lens group 2, and at least one aspherical surface is provided from the object side of the first lens 21 to the image side of the second lens 22. Such a design can make the structure of the lens module 6 more compact, thereby helping to reduce the volume of the lens module 6 and the space occupied by the lens module 6 in the electronic device, which is more in line with actual usage requirements.

Claims

1. A lens module, characterized in that: The lens module comprises: case; A lens group, which is mounted on the housing and includes at least four lenses; A reflector, which is mounted on the housing and is used to reflect the light transmitted by the lens group; An image sensor, the image sensor being mounted on the housing and configured to receive the light reflected by the reflector; Wherein, the lens group includes a first lens and a second lens. Along the axial direction of the lens group, the first lens and the second lens are located at opposite ends of the lens group. There is at least one aspherical surface from the object side of the first lens to the image side of the second lens. The lenses of the lens group are arranged in sequence along a first direction, and the image sensor is arranged tilted relative to the first direction.

2. The lens module according to claim 1, characterized in that: The total effective focal length of the lens module is F1, and F1 satisfies: F1>40 mm.

3. The lens module according to claim 1, characterized in that: The angle between the image sensor and the first direction is a, and 22°≤a≤37°.

4. The lens module according to claim 1, characterized in that: Half of the diagonal length of the effective pixel area of ​​the imaging surface of the image sensor is b, and 3 mm≤b≤4.25 mm.

5. The lens module according to claim 4, characterized in that: The lens group includes four lenses.

6. The lens module according to claim 1, characterized in that: The lens group includes five lenses, and along the first direction, the size of the lens module is 3 mm to 6 mm.

7. The lens module according to claim 6, characterized in that: The half field angle of the lens group is d, 10deg≤d≤16deg.

8. The lens module according to claim 6, characterized in that: The aperture value of the lens module is e, 1≤e≤3.

5.

9. The lens module according to any one of claims 1 to 8, characterized in that: The reflector includes at least an incident surface, a first reflecting surface, a second reflecting surface, a third reflecting surface and an exiting surface. The incident surface is used to receive light, and the reflector is used to reflect the light from the incident surface to the second reflecting surface. The second reflecting surface is used to reflect the light to the third reflecting surface, and the third reflecting surface is used to reflect the light to the exiting surface.

10. The lens module according to claim 9, characterized in that: The included angle between the second reflection surface and the incident surface is β, the effective diameter of the incident surface is h, and 0.2≤|tanβ| / h≤0.3 is satisfied.

11. The lens module according to claim 9, characterized in that: The effective diameter of the incident surface is h, the maximum effective diameter of the second lens is D2, and 1.0≤h / D2≤1.5 is satisfied.

12. The lens module according to claim 9, characterized in that: The reflector is a parallelogram prism.

13. The lens module according to claim 9, characterized in that: Along the direction perpendicular to the emission surface, the size of the lens module is H, the maximum effective diameter of the first lens is D1, and the following relation is satisfied: 2.5<H / D1<3.

5.

14. The lens module according to any one of claims 1 to 8, characterized in that: The lens group and the image sensor are located on the same side of the reflector.

15. The lens module according to any one of claims 1 to 8, characterized in that: The equivalent distance in air of the path of light propagating from the object side of the lens group to the imaging surface of the image sensor is TL, the distance from the object side of the lens group to the imaging surface of the image sensor in the normal direction of the imaging surface of the image sensor is T, and TL and T satisfy 3.0<TL / T<4.

0.

16. The lens module according to any one of claims 1 to 8, characterized in that: The distance from the object side of the lens group to the imaging surface of the image sensor in the normal direction of the imaging surface of the image sensor is T, the total effective focal length of the lens module is F1, and T and F1 satisfy T / F1<0.

6.

17. The lens module according to any one of claims 1 to 8, characterized in that: The total effective focal length F1 of the lens module and the effective focal length f1 of the first lens satisfy 3.0<F1 / f1<4.0, and the total effective focal length F1 of the lens module and the effective focal length f2 of the second lens satisfy -3.5<F1 / f2<-3.

0.

18. The lens module according to any one of claims 1 to 8, characterized in that: The ratio of the entrance pupil diameter of the lens module to half the diagonal length of the effective pixel area on the imaging surface of the lens module is m, and 2.0<m<3.

0.

19. The lens module according to any one of claims 1 to 8, characterized in that: The refractive index of the first lens is N1, the refractive index of the second lens is N2, and 1.65<(N1+N2) / 2<1.

8.

20. The lens module according to any one of claims 1 to 8, characterized in that: The shell includes a first shell and a second shell, the lens group is installed on the first shell, the image sensor is installed on the second shell, the incident end of the reflector is installed on the first shell, and the emitting end of the reflector is installed on the second shell.

21. An electronic device, characterized in that: The electronic device comprises the lens module according to any one of claims 1 to 20.

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