Optical lens, lens module, and electronic device

Abstract

An optical lens (100), a lens module (20), and an electronic device (01), relating to the technical field of image acquisition devices, and aiming to reduce the height of a main camera lens or a wide-angle lens. The optical lens (100) comprises a first lens group (110) and a second lens group (120). The first lens group (110) is located on the object side of the second lens group (120). During focusing of the optical lens (100), the second lens group (120) moves along the optical axis of the second lens group (120). The first lens group (110) comprises a first reflective element (130), and the first reflective element (130) is used for reflecting a light beam from a first lens (101) to the second lens group (120). The first reflective element (130) folds an optical path in the optical lens (100), thereby reducing the height of the optical lens (100) and facilitating the miniaturization of the optical lens (100).

Description

Optical lens, lens module and electronic device

[0001] The present application claims priority to the Chinese patent application No. 202411358562.3, filed on September 26, 2024, and entitled "Optical lens, lens module and electronic device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the technical field of image acquisition devices, in particular to an optical lens, a lens module and an electronic device. BACKGROUND

[0003] With the upgrading of electronic devices, consumers are increasingly concerned about the performance of electronic devices. For example, consumers hope that electronic devices are convenient and thin. Each component in the electronic device may affect the thinness of the electronic device.

[0004] For example, the lens size of the electronic device directly affects the overall thickness of the electronic device. Reducing the height of the main camera lens or the wide-angle lens becomes one of the key factors to reduce the thickness of the electronic device. SUMMARY

[0005] Embodiments of the present application provide an optical lens, a lens module and an electronic device. The height of the main camera lens or the wide-angle lens is reduced.

[0006] To achieve the above-mentioned purpose, the technical solutions adopted by the present application are as follows.

[0007] In a first aspect, the present application provides an optical lens. The optical lens comprises a first lens group and a second lens group. The first lens group is located on the object side of the second lens group; during focusing, the second lens group moves along the optical axis of the second lens group. The lens closest to the object in the first lens group is a first lens, and the optical power of the first lens is negative; the first lens group further comprises a first reflecting element for reflecting the light beam from the first lens to the second lens group. The second lens group comprises a second lens and a third lens; the second lens is the lens closest to the object side in the second lens group, and the optical power of the second lens is positive; the third lens is used to receive the light beam from the second lens, and the optical power of the third lens is negative; the optical lens satisfies the following relationship: 0.4≤effective focal length of the optical lens / full image height of the optical lens≤1.3; 1.2≤total optical length of the optical lens / full image height of the optical lens.

[0008] Therefore, the first lens has a negative focal power, so that the optical lens has a large field of view. The light beam from the first lens is reflected by the first reflecting element to the second lens group. The light path in the optical lens is folded. The height of the optical lens is reduced, which is conducive to the miniaturization of the optical lens and the saving of space of the electronic device. The second lens with a positive focal power converges the light beam emitted by the first reflecting element, and the third lens with a negative focal power is used to correct the aberration. In addition, the second lens and the third lens with a relatively large thickness have a relatively small impact on the height of the optical lens, the requirement for the thinness of the second lens and the third lens is reduced, the producibility of the second lens and the third lens is greatly improved, and the second lens and the third lens with a relatively large thickness can be used to improve the optical performance of the optical lens.

[0009] With reference to the first aspect, in some possible implementation manners, the second lens group has a positive focal power. In this way, the light beam emitted by the first lens group can be better converged.

[0010] With reference to the first aspect, in some possible implementation manners, the third lens is the lens in the second lens group closest to the second lens.

[0011] With reference to the first aspect, in some possible implementation manners, the first lens group further includes a fourth lens with a positive focal power. The first reflecting element is configured to reflect the light beam from the first lens to the second lens group, and the fourth lens is configured to transmit the light beam from the first reflecting element to the second lens group.

[0012] With reference to the first aspect, in some possible implementation manners, the optical lens further satisfies the following relationship: 0.6≤|effective focal length of the optical lens / first effective focal length|≤3.0, and the first effective focal length is the effective focal length of the lens group composed of the fourth lens and the second lens. In this way, the aberration correction and the size miniaturization of the optical lens are facilitated.

[0013] With reference to the first aspect, in some possible implementation manners, the optical lens is in a first state, and the first lens group rotates around a virtual axis; the optical axis of the first lens and the optical axis of the second lens group are both perpendicular to the virtual axis. In this way, the rotation of the first lens group enables the optical lens to have an anti-shake function.

[0014] With reference to the first aspect, in some possible implementation manners, the maximum rotation angle of the first lens group is Gp1T, the rotation angle of the optical axis of the first lens group caused by the rotation of the first lens group is OARA, and the optical lens further satisfies the following relationship: 2.0≤Gp1T / OARA. In this way, the sensitivity of the optical lens to anti-shake can be improved, and the light shadow problem is not obvious.

[0015] With reference to the first aspect, in some possible implementations, the optical lens further includes a second reflective element. The second reflective element is located on an image side of the second lens group. The second reflective element is configured to reflect a light beam from the second lens group to an imaging plane of the optical lens. In this way, the second reflective element can fold the optical path of the optical lens again. The size of the optical lens along the optical axis of the second lens group is reduced.

[0016] With reference to the first aspect, in some possible implementations, the optical lens includes five or more aspheric lenses. An aspheric lens can be easily manufactured into a shape other than a spherical shape, and more control variables can be obtained to reduce aberration, thereby reducing the number of lenses required, and thus the total optical length can be effectively reduced. The inflection point helps to increase the image height and further correct the off-axis aberration of the optical lens.

[0017] With reference to the first aspect, in some possible implementations, the optical lens further satisfies the following relationship:

[0018] 0 < |effective focal length of the first lens group / effective focal length of the second lens group| ≤ 8.5. In this way, the refractive power of the first lens group and the refractive power of the second lens group are relatively balanced, which is beneficial to the aberration correction and miniaturization of the optical lens 100. If |effective focal length of the first lens group / effective focal length of the second lens group| is greater than 8.5, the refractive power of the first lens group is too large, the aberration correction of the optical lens 100 is poor, and the resolution of the optical lens 100 is also reduced. In some embodiments of the present application, 0 < |effective focal length of the first lens group / effective focal length of the second lens group| ≤ 4.8.

[0019] With reference to the first aspect, in some possible implementations, the optical lens further satisfies the following relationship:

[0020] 1.0 ≤ |effective focal length of the first lens group / effective focal length of the optical lens| ≤ 11.0. In this way, the optical lens is miniaturized. If |effective focal length of the first lens group / effective focal length of the optical lens| is less than 1.0, the negative refractive power of the first lens group is too strong, and the volume of the second lens group is large, which is not conducive to miniaturization. If |effective focal length of the first lens group / effective focal length of the optical lens| is greater than 11.0, the negative refractive power of the first lens group is weak, which is not conducive to the refractive and aberration correction of the first lens group.

[0021] With reference to the first aspect, in some possible implementations, the optical lens further satisfies the following relationship:

[0022] 0.1 ≤ |effective focal length of the first lens group / effective focal length of the second lens group| ≤ 13.0. In this way, the optical lens has good focusing performance, which is beneficial to the miniaturization and high resolution of the optical lens 100.

[0023] With reference to the first aspect, in some possible implementation manners, the optical lens further satisfies the following relationship:

[0024] 0<|effective focal length of the first lens group / effective focal length of the third lens|≤9.5. In this way, the optical lens has a larger field of view and higher resolution, and the aberration correction is excellent.

[0025] With reference to the first aspect, in some possible implementation manners, the lens closest to the image side in the optical lens is a reverse-curved point aspherical lens.

[0026] In a second aspect, an embodiment of the present application provides a lens module. The lens module comprises an optical sensor and any of the optical lenses provided in the first aspect, the optical sensor being located on an image side of the lens module, and the optical lens being configured to project an image onto the optical sensor, and the optical sensor being configured to convert the image into digital image data.

[0027] In a third aspect, an embodiment of the present application provides an electronic device. The electronic device comprises a housing and any of the lens modules provided in the second aspect, and the lens module is arranged on the housing.

[0028] The beneficial effects of any of the implementation manners of the second aspect or the third aspect can be refer to the description of any of the optional implementation manners of the first aspect, which will not be described herein. On the basis of the implementation manners of the above aspects, the present application can be further combined to provide more implementation manners. BRIEF DESCRIPTION OF DRAWINGS

[0029] FIG. 1 is a structural schematic diagram of an electronic device.

[0030] FIG. 2 is a structural schematic diagram of a lens module.

[0031] FIG. 3 is a structural schematic diagram of an optical lens and an optical sensor according to an embodiment of the present application.

[0032] FIG. 4a is a curve diagram of spherical aberration and normalized aperture of the optical lens shown in FIG. 3.

[0033] FIG. 4b is a field curvature diagram of the optical lens shown in FIG. 3.

[0034] FIG. 4c is a distortion diagram of the optical lens shown in FIG. 3.

[0035] FIG. 5 is a structural schematic diagram of another optical lens and an optical sensor according to an embodiment of the present application.

[0036] FIG. 6a is a curve diagram of spherical aberration and normalized aperture of the optical lens shown in FIG. 5.

[0037] FIG. 6b is a field curvature diagram of the optical lens shown in FIG. 5.

[0038] FIG. 6c is a distortion chart of the optical lens shown in FIG. 5.

[0039] FIG. 7 is a structural schematic diagram of another optical lens and optical sensor provided by an embodiment of the present application.

[0040] FIG. 8a is a curve chart of spherical aberration and normalized aperture of the optical lens shown in FIG. 7.

[0041] FIG. 8b is a curve chart of field curvature of the optical lens shown in FIG. 7.

[0042] FIG. 8c is a distortion chart of the optical lens shown in FIG. 7.

[0043] FIG. 9 is a structural schematic diagram of still another optical lens and optical sensor provided by an embodiment of the present application.

[0044] FIG. 10a is a curve chart of spherical aberration and normalized aperture of the optical lens shown in FIG. 9.

[0045] FIG. 10b is a curve chart of field curvature of the optical lens shown in FIG. 9.

[0046] FIG. 10c is a distortion chart of the optical lens shown in FIG. 9.

[0047] FIG. 11 is a structural schematic diagram of still another optical lens and optical sensor provided by an embodiment of the present application.

[0048] FIG. 12a is a curve chart of spherical aberration and normalized aperture of the optical lens shown in FIG. 11.

[0049] FIG. 12b is a curve chart of field curvature of the optical lens shown in FIG. 11.

[0050] FIG. 12c is a distortion chart of the optical lens shown in FIG. 11.

[0051] FIG. 13 is a structural schematic diagram of still another optical lens and optical sensor provided by an embodiment of the present application.

[0052] FIG. 14a is a curve chart of spherical aberration and normalized aperture of the optical lens shown in FIG. 13.

[0053] FIG. 14b is a curve chart of field curvature of the optical lens shown in FIG. 13.

[0054] FIG. 14c is a distortion chart of the optical lens shown in FIG. 13.

[0055] In the figure: 01-electronic device; 11-include cover plate; 12-display screen; 13-middle frame; 14-battery cover; 15-printed circuit board; 20-lens module; 201-translucent cover plate; 100-optical lens; 202-optical sensor; 203-diaphragm; 204-filter; 110-first mirror group; 120-second mirror group; 101-first lens; 102-second lens; 103-third lens; 104-fourth lens; 130-first reflecting element; 140-third mirror group; 150-second reflecting element. DETAILED DESCRIPTION

[0056] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings.

[0057] Hereinafter, the terms "first", "second", and the like are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0058] In addition, in the present application, the orientation terms such as "upper", "lower", and the like are defined with respect to the orientation of the components shown in the drawings, and it should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and can be changed accordingly according to the change of the orientation of the components placed in the drawings.

[0059] The following briefly describes the concepts involved in the following embodiments.

[0060] Object side, with optical lens as the boundary, the side where the object is located is the object side, and the side of the lens or optical element facing the object side is the object side.

[0061] Image side, with optical lens as the boundary, the side where the image of the object is located is the image side, and the side of the lens or optical element facing the image side is the image side.

[0062] F-number (F): the ratio of the total focal length of the lens to the diameter of the entrance pupil. The smaller the F-number, the more light passing through the aperture in the same unit of time. The larger the F-number, the less light passing through the aperture in the same unit of time.

[0063] Curvature radius: curvature is a value used to represent the bending degree of a curve at a certain point. The greater the curvature, the greater the bending degree of the curve, and the reciprocal of the curvature is the curvature radius.

[0064] Stop: including aperture stop and field stop, wherein the aperture stop can limit the width of the imaging light beam, determine the size of the entrance pupil diameter and the solid angle of the light beam of the optical system, and affect the light amount of the optical system. The field stop limits the field of view of the object space that can be imaged by the optical system.

[0065] Total track length (TTL): the length of the object side surface of the first optical element towards the object side in the lens to the length of the imaging surface on the optical axis is the total length. That is, the total length from the lens barrel head to the imaging surface is the main factor of forming the height of the camera. The total length is used to represent the size of the lens.

[0066] Image height (IH): the full image height of the image formed by the optical lens.

[0067] Effective focal length (EFL): the distance from the principal plane of the optical system to the corresponding focus.

[0068] Field of view (FOV): refers to the maximum angle that can be shot by the lens.

[0069] Half field of view (HFOV): refers to half of the maximum angle that can be shot by the lens.

[0070] Object side surface: the surface closest to the real object on the lens is the object side surface.

[0071] Image side surface: the surface closest to the imaging surface on the lens is the image side surface.

[0072] Positive lens: the lens or lens group has a positive focal length, so that the lens or lens group can play the role of converging light.

[0073] Negative lens: the lens or lens group has a negative focal length, so that the lens or lens group can play the role of making light diverge.

[0074] Focal length: the distance from the principal plane of the lens to the corresponding focus.

[0075] Abbe number: the Abbe number of the lens is the dispersion coefficient of the lens, which refers to the difference ratio of the refractive index of the lens at different wavelengths, and is used to represent the dispersion degree of the lens. Generally, the larger the refractive index of the medium, the more serious the dispersion, and the smaller the Abbe number. On the contrary, the smaller the refractive index of the medium, the lighter the dispersion, and the larger the Abbe number.

[0076] Aberration: refers to the result of non-paraxial ray tracing in the lens and the result of paraxial ray tracing, which deviates from the ideal condition of Gaussian optics (first-order approximation theory or paraxial ray). Aberration is divided into two categories: chromatic aberration and monochromatic aberration. Chromatic aberration is due to the fact that the refractive index of the lens material is a function of wavelength. Different wavelengths of light passing through the lens will produce chromatic dispersion due to different refractive indices. The chromatic dispersion that the refractive index decreases with the increase of wavelength can be called normal dispersion, and the chromatic dispersion that the refractive index increases with the increase of wavelength can be called negative dispersion (or abnormal dispersion). Monochromatic aberration refers to the aberration that occurs even in highly monochromatic light. According to the effect of the generation, monochromatic aberration is divided into two categories: "blurring the image" and "distorting the image". The former includes spherical aberration and astigmatism, and the latter includes field curvature and distortion. Chromatic aberration includes axial chromatic aberration and off-axis chromatic aberration. Axial chromatic aberration refers to the fact that the focal points of different colors of light are different because the lens has different refractive indices for different wavelengths of light.

[0077] Spherical aberration is also called spherical aberration. The light beams emitted by an on-axis object point pass through the optical system and intersect the optical axis at different positions with different angles from the optical axis. Therefore, a circular diffraction spot is formed on the image plane, which is spherical aberration.

[0078] Embodiments of the present application provide an electronic device with camera function, for example, the electronic device can be a mobile phone, a pad, a personal digital assistant (PDA), a television, a smart wearable product (for example, a smart watch, a smart bracelet), a virtual reality (VR) terminal device, etc. In order to facilitate the description, the electronic device is taken as a mobile phone in FIG. 1 as an example.

[0079] FIG. 1 is a structural schematic diagram of an electronic device 01. As shown in FIG. 1, the electronic device 01 includes a cover plate 11, a display screen 12, a middle frame 13, a battery cover 14 and a printed circuit board 15. The battery cover 14 and the display screen 12 are respectively located on both sides of the middle frame 13, and the middle frame 13 and the display screen 12 are arranged in the battery cover 14, the cover plate 11 is arranged on the side of the display screen 12 away from the middle frame 13, and the display surface of the display screen 12 faces the cover plate 11. The printed circuit board 15 can be fixed on the middle frame 13, and the printed circuit board 15 and the display screen 12 are electrically connected.

[0080] The display screen 12 has a display surface A1 for displaying images and a back surface A2 away from the display surface A1.

[0081] The structure of the display screen 12, the cover plate 11 and the middle frame 13 is not limited in the embodiments of the present application, and can be set according to the use of the electronic device 01. The electronic device 01 also has an image acquisition function, as shown in FIG. 1, the electronic device 01 further includes a lens module 20. The lens module 20 is connected with the battery cover 14.

[0082] Exemplarily, in some embodiments of the present application, the lens module 20 can be used as a rear camera. In this case, as shown in FIG. 1, the lens module 20 is located on the back surface A2 of the display screen 12, and the light receiving surface (the surface for receiving light) of the lens module 20 can be away from the back surface A2 of the display screen 12.

[0083] Alternatively, in some other embodiments of the present application, the lens module 20 can be used as a front camera. In this case, as shown in FIG. 1, the lens module 20 can be located on the back surface A2 of the display screen 12. And the light receiving surface of the lens module 20 can be towards the back surface A2 of the display screen 12.

[0084] Please refer to FIG. 2, in the embodiments of the present application, the lens module 20 includes a light-transmitting cover plate 201, an optical lens 100 and an optical sensor 202, the light-transmitting cover plate 201, the optical lens 100 and the optical sensor 202 can be arranged along the optical axis, the optical sensor 202 is located on the image side of the optical lens 100, the light-transmitting cover plate 201 is located on the object side of the optical lens 100, the external light passes through the light-transmitting cover plate 201 and the optical lens 100 and is received by the optical sensor 202 to form an image on the optical sensor 202; the optical sensor 202 is electrically connected with the printed circuit board 15 (as shown in FIG. 1) of the electronic device 01 (as shown in FIG. 1) to convert the received image into an electrical signal and send it to the printed circuit board, thereby realizing photographing or video recording.

[0085] In the above implementation, the light-transmitting cover plate 201 is located on the object side of the optical lens 100, and the light-transmitting cover plate 201 can realize the protection and dust prevention of the optical lens 100, and the material of the light-transmitting cover plate 201 can include glass, resin, etc., and the embodiments of the present application do not limit the material of the light-transmitting cover plate 201.

[0086] In the above implementation, the optical sensor 202 can include a CCD (charged coupled device) image sensor or a CMOS (complementary metal oxide semiconductor) image sensor or the like photosensitive device, and the application does not limit the optical sensor 202 as long as it can convert the image formed by the lens assembly 220 into an electrical signal and send it to the printed circuit board 15 (as shown in FIG. 1). For example, the lens module 20 can also include a circuit board, and the optical sensor 202 can be arranged on the surface of the circuit board. The circuit board is provided with a circuit electrically connected with the optical sensor 202, and the circuit can be electrically connected with the printed circuit board 15, and the electrical connection between the printed circuit board 15 and the optical sensor 202 is realized through the circuit. In some embodiments, the optical sensor 202 can move in a direction perpendicular to the optical axis to realize the anti-shake effect of the lens module 20.

[0087] Please refer to FIG. 2, in the embodiment of the application, the lens module 20 can also include a diaphragm 203 and a filter 204. The diaphragm 203 is arranged between the optical lens 100 and the light-transmitting cover plate 201, and the diaphragm 203 can limit the light quantity of the lens assembly 220. For example, the diaphragm 203 can be a variable diaphragm, and the variable diaphragm can be electrically connected with the printed circuit board 15. The light quantity of the variable diaphragm can be controlled through the printed circuit board 15 to adapt to different shooting and recording scenes. The filter 204 is arranged between the optical sensor 202 and the lens assembly 220, and the filter 204 can filter the light rays to the optical sensor 202 to eliminate the required light rays and improve the imaging quality.

[0088] The optical lens 100 includes a plurality of lenses arranged along the optical axis. The light from the outside world passes through each lens in turn and forms an image on the optical sensor 202. The application does not limit the number of lenses in the optical lens 100. Reasonably setting the number of lenses and the optical power of the lenses can improve the clarity of the image formed by the optical lens 100 on the optical sensor 202.

[0089] The size of the optical lens 100 will directly affect the size of the lens module 20. And the size of the lens module 20 will directly affect the thickness of the electronic device 10. The optical lens 100 provided by the application has a small size, which is conducive to reducing the thickness of the electronic device 10.

[0090] FIG. 3 is a structural diagram of an optical lens 100 and an optical sensor 202 according to an embodiment of the present application. Referring to FIG. 3, the optical lens 100 includes a first lens group 110 and a second lens group 120. The first lens group 110 is located on the object side of the second lens group 120. During focusing, the second lens group 120 moves along the optical axis (dashed line L in FIG. 3) of the second lens group 120.

[0091] Exemplarily, the first lens group 110 and the second lens group 120 each include a plurality of lenses. The first lens group 110 includes at least two lenses, a first lens 101 and a first reflective element 130. The first lens 101 is the lens closest to the object side in the first lens group 110. The first lens 101 has a negative optical power. The first lens 101 with a negative optical power can expand the field of view and provide conditions for folding the optical path of the optical lens 100. The first reflective element 130 is located on the image side of the first lens 101. The first reflective element 130 is configured to reflect the light beam from the first lens 101 to the second lens group 120. The first reflective element 130 can change the propagation direction of the light beam and fold the optical path of the optical lens 100.

[0092] The second lens group 120 includes a second lens 102 and a third lens 103. The second lens 102 is the lens closest to the object side in the second lens group 120. The third lens 103 is configured to receive the light beam from the second lens 102. The second lens 102 has a positive optical power, and the third lens 103 has a negative optical power.

[0093] Exemplarily, the optical lens 100 satisfies the following relationship: 0.4≤effective focal length of the optical lens / full image height of the optical lens≤1.3. For example, the effective focal length of the optical lens is 0.4 times, 0.5 times, 0.6 times, 0.7 times, 0.8 times, 0.9 times, 1.1 times, 1.1 times, 1.2 times, or 1.3 times the full image height of the optical lens. The ratio of the effective focal length of the optical lens to the full image height of the optical lens is within the above range, so that the optical lens 100 has good aberration correction, a large field of view, and high imaging resolution.

[0094] In some embodiments, 0.4≤focal length of the optical lens / full image height of the optical lens≤0.8.

[0095] Exemplarily, the effective focal length of the optical lens 100 is 5 mm-9.5 mm. For example, the effective focal length of the optical lens 100 is 5 mm, 5.17 mm, 6 mm, 7 mm, 8 mm, 8.88 mm, 9.2 mm, 9.45 mm, or 9.5 mm.

[0096] Exemplarily, the total track height of the optical lens 100 is 8mm-16mm. For example, the total track height of the optical lens 100 is 8mm, 9mm, 10mm, 10.8mm, 12mm or 16mm, etc.

[0097] In some embodiments, the third lens 103 is the lens in the second lens group 120 closest to the second lens 102. In other words, the third lens 103 is the lens in the second lens group 120 closest to the object side, and the first closest lens is the second lens 102.

[0098] In some embodiments, a lens with positive refractive power can be further arranged between the third lens 103 and the second lens 102.

[0099] In some embodiments, the second lens group 120 has positive refractive power. In this way, the light beams emitted by the first lens group 110 can be better converged.

[0100] Exemplarily, the optical lens 100 further satisfies the following relationship: 1.2≤total track length of the optical lens / total track height of the optical lens. Exemplarily, the total track length TTL of the optical lens is 1.2 times or more of the total track height of the optical lens. For example, the total track length TTL of the optical lens is 1.2 times, 1.5 times, 1.6 times, 2 times, 2.3 times, 2.5 times, 2.8 times, 3 times, 4 times or 5 times of the total track height of the optical lens. If the total track length of the optical lens / total track height of the optical lens is less than 1.2, the total track length TTL of the optical lens becomes small relative to the total track height of the optical lens, and aberration is prone to occur.

[0101] In some embodiments, 1.2≤total track length of the optical lens / total track height of the optical lens≤4.0. When the total track length of the optical lens / total track height of the optical lens is within the foregoing range, the effect of aberration correction is better.

[0102] Exemplarily, the total track length TTL of the optical lens 100 is 14mm-40mm. For example, the total track length TTL of the optical lens 100 is 14mm, 14.08mm, 20mm, 30.15mm, 32.98mm, 35.23mm, 37.5mm or 40mm, etc.

[0103] The light beam from the first lens 101 is reflected to the second lens group 120 by the first reflecting element 130. The light path in the optical lens 100 is folded. The height H of the optical lens 100 is reduced, which is beneficial to miniaturization of the optical lens 100 and saving space of the electronic device 01. In addition, the thickness of the second lens 102 and the third lens 103 has less impact on the height of the optical lens 100, and the requirement for thinness of the second lens 102 and the third lens 103 is reduced. The producibility of the second lens 102 and the third lens 103 is greatly improved, and the second lens 102 and the third lens 103 can be thicker to improve the optical performance of the optical lens 100. Compared with the optical lens without light path folding, the length of the optical lens 100 provided in the embodiment of the present application along the optical axis direction of the second lens group 120 is longer, which can effectively moderate the light incident to the image plane and improve the image quality.

[0104] The structure of the first reflecting element 130 is not limited in the embodiment of the present application. For example, the first reflecting element 130 includes a lens and a reflecting film arranged on the surface of the lens.

[0105] The number of lenses in the second lens group 120 is not limited in the case of meeting the condition that the optical power of the second lens group 120 is positive. The number of lenses in the first lens group 110 is also not limited in the embodiment of the present application.

[0106] In some embodiments of the present application, the lens closest to the image side in the optical lens 100 is an aspherical lens with a concave point. The aspherical lens can make the lens easy to be manufactured into a shape other than a spherical shape, obtain more control variables to reduce aberration, and thus reduce the number of lenses required, thereby effectively reducing the total optical length. The aspherical lens is very effective in correcting spherical aberration and astigmatism. The concave point helps to increase the height of the image plane, which is beneficial to correcting the curvature of the image plane and further correcting the off-axis aberration of the optical lens 100.

[0107] In some embodiments of the present application, the optical lens 100 includes five or more aspherical lenses. The effect of the aspherical lens is as described above. The distribution position of the five or more aspherical lenses in the optical lens 100 is not limited in the embodiment of the present application. For example, part of the aspherical lenses are located in the first lens group 110, and part of the aspherical lenses are located in the second lens group 120. Alternatively, all the aspherical lenses are located in the first lens group 110, or all the aspherical lenses are located in the second lens group 120.

[0108] It can be understood that in the embodiments of the present application, the optical lens 100 can further include a third lens group located on the image side of the second lens group 120, and part of the five or more aspherical lenses or all the aspherical lenses can be located in the third lens group.

[0109] Please return to FIG. 2. In some embodiments of the present application, the optical lens 100 also satisfies the following relationship:

[0110] 0 < |effective focal length of the first lens group / effective focal length of the second lens group| ≤ 8.5. The effective focal length of the first lens group is EFLGp1, and the effective focal length of the second lens group is EFLGp2. That is, the absolute value of the ratio of the effective focal length EFLGp1 of the first lens group to the effective focal length EFLGp2 of the second lens group is 0-8.5, for example, the absolute value can be 0.02, 0.1, 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 8.4 or 8.5, etc. In this way, the optical power of the first lens group and the optical power of the second lens group are relatively balanced, which is beneficial to the aberration correction and miniaturization of the optical lens 100. If |effective focal length of the first lens group / effective focal length of the second lens group| is greater than 8.5, the optical power of the first lens group is larger, the aberration correction of the optical lens 100 is poorer, and the resolution of the optical lens 100 also decreases. In some embodiments of the present application, 0 < |effective focal length of the first lens group / effective focal length of the second lens group| ≤ 4.8.

[0111] Exemplarily, the effective focal length of the first lens group can be -90mm-7mm. For example, the effective focal length of the first lens group is -90mm, -95.82mm, -44.89mm, -31.13mm, -11.16mm, -12.01mm, 6.16mm or 7mm, etc.

[0112] Exemplarily, the effective focal length of the second lens group can be -290mm-13mm. For example, the effective focal length of the second lens group is -290mm, -290.23mm, 7.02mm, 8.41mm, 9.95mm, 10.26mm, 12.49mm or 13mm, etc.

[0113] In some embodiments of the present application, the optical lens 100 also satisfies the following relationship: 1.0 ≤ |effective focal length of the first lens group / effective focal length of the optical lens| ≤ 11.0. The effective focal length of the optical lens 100 is EFL. That is, the absolute value of the ratio of the effective focal length EFLGp1 of the first lens group to the effective focal length EFL of the optical lens is 1.0-11.0. For example, the absolute value can be 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0 or 11.0. In this way, it is beneficial to the miniaturization of the optical lens 100. If |effective focal length of the first lens group / effective focal length of the optical lens| is less than 1.0, the negative refractive power of the first lens group is too strong, and the volume of the second lens group is larger, which is not conducive to miniaturization. If |effective focal length of the first lens group / effective focal length of the optical lens| is greater than 11.0, the negative refractive power of the first lens group is weaker, which is not conducive to the refractive and aberration correction of the first lens group.

[0114] In some embodiments of the present application, 1.0≤|effective focal length of the first lens group / effective focal length of the optical lens|≤5.4.

[0115] In some embodiments of the present application, the optical lens 100 also satisfies the following relationship: 0.1≤|effective focal length of the first lens group / effective focal length of the second lens|≤13.0. The effective focal length of the second lens is EFLGp2L1; that is, the absolute value of the ratio of the effective focal length EFLGp1 of the first lens group to the effective focal length EFLGp2L1 of the second lens is 0.1-13.0. For example, the absolute value can be 0.1, 0.5, 0.9, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.5, or 13.0, etc. In this way, the optical lens 100 has good focusing performance, which is conducive to the miniaturization and high resolution of the optical lens 100.

[0116] If |effective focal length of the first lens group / effective focal length of the second lens| is less than 0.1, the refractive power of the second lens is too strong, the error of the second lens is large, and the resolution of the optical lens 100 is reduced. If |effective focal length of the first lens group / effective focal length of the second lens| is greater than 13, the focusing difficulty of the optical lens 100 increases, the movement amount of the lens required for focusing increases, and the volume of the optical lens 100 increases.

[0117] In some embodiments of the present application, 0.1≤|effective focal length of the first lens group / effective focal length of the second lens|≤5.5.

[0118] For example, the effective focal length of the second lens can be 6mm-11mm. For example, the effective focal length of the second lens is 6mm, 6.22mm, 7.89mm, 8.94mm, 10.15mm, 10.16mm, or 10.75mm, etc.

[0119] In some embodiments of the present application, the optical lens 100 also satisfies the following relationship: 0<|effective focal length of the first lens group / effective focal length of the third lens|≤9.5. The effective focal length of the third lens is EFLGp2L2; that is, the absolute value of the ratio of the effective focal length EFLGp1 of the first lens group to the effective focal length EFLGp2L2 of the third lens is 0-9.5. For example, the absolute value can be 0.1, 0.5, 0.9, 1.0, 2.0, 3.0, 4.0, 4.7, 5.0, 6.0, 7.0, 8.0, 9.0, 9.5. In this way, the optical lens 100 has a larger field of view and higher resolution, and the aberration correction is excellent.

[0120] If |effective focal length of the first lens group / effective focal length of the third lens| is greater than 9.5, the refractive power of the first lens group is weakened, which is not conducive to the wide-angle of the view angle. If the refractive power of the third lens is too strong, the problem of deterioration of aberrations such as image surface curvature will occur. In some embodiments of the present application, 0<|effective focal length of the first lens group / effective focal length of the third lens|≤4.7.

[0121] Exemplarily, the effective focal length of the third lens is -75mm to -6mm; for example, the effective focal length of the third lens is -75mm, -72.60mm, -35.23mm, -23.00mm, -10.99mm, -10.49mm, -6.89mm or -6mm, etc.

[0122] In some embodiments of the present application, the first lens group 110 can rotate. For example, the optical lens 100 is in the first state, and the first lens group 110 rotates around a virtual axis. Wherein the optical axis of the first lens group 110 and the optical axis of the second lens group 120 (dashed line L in FIG. 3) are both perpendicular to the virtual axis. The rotation of the first lens group 110 makes the optical lens 100 have the function of anti-shake.

[0123] For example, when the electronic device is subjected to external force, the electronic device rotates forward around the virtual axis, and the first lens group 110 of the optical lens 100 rotates reversely around the virtual axis, so that the optical lens 100 and the photographed object have a relatively stable positional relationship. The aforementioned forward rotation and reverse rotation are only examples of the opposite direction of the rotation process. For example, the forward rotation is clockwise rotation, and the reverse rotation is counterclockwise rotation. Or, the forward rotation is counterclockwise rotation, and the reverse rotation is clockwise rotation.

[0124] In some embodiments of the present application, the maximum angle of rotation of the first lens group is Gp1T; the optical axis rotation angle of the first lens group caused by the rotation of the first lens group is OARA; and the optical lens further satisfies the following relationship: 2.0≤Gp1T / OARA. Exemplarily, Gp1T / OARA can be 2.0, 2.1, 2.8, 3.5, 4.8, 5.6, 7.8, 8.9, 10.5, 12, 15, 20, 23, 28 or 30, etc. In this way, the sensitivity of the optical lens 100 to anti-shake can be improved, and the problem of light shadow is not obvious. In some embodiments, 2.0≤Gp1T / OARA≤4.5; in some embodiments, 2.0≤Gp1T / OARA≤3.5. This is conducive to further improving the anti-shake performance.

[0125] In some embodiments of the present application, it is not necessary for the first lens group 110 to rotate around the virtual axis, and the first lens group 110 can not rotate around the virtual axis.

[0126] As shown in FIG. 3, in some embodiments of the present application, the first lens group 110 can further include a fourth lens 104, and the fourth lens 104 has positive refractive power.

[0127] The first reflecting element 130 in the foregoing is configured to reflect the light beam from the first lens 101 to the second lens group 120, and the first reflecting element 130 is configured to reflect the light beam from the first lens 101 to the fourth lens 104, and the fourth lens 104 is configured to emit the light beam from the first reflecting element 130 to the second lens group 120.

[0128] In other words, the first lens group 110 can include three lenses, i.e., the first lens 101, the fourth lens 104, and the first reflecting element 130. The fourth lens 104 is located on the image side of the first reflecting element 130.

[0129] For example, the optical lens 100 further satisfies the following relationship: 0.6≤|effective focal length of the optical lens / first effective focal length|≤3.0. The first effective focal length is the effective focal length of the fourth lens 104 and the second lens 102 as a whole. For example, the first effective focal length is the effective focal length of the fourth lens 104 and the second lens 102 as a whole in the state of imaging at an infinite object distance. In other words, the fourth lens 104 and the second lens 102 are regarded as a whole, and the effective focal length of the whole is the first focal length.

[0130] For example, the absolute value of the ratio of the effective focal length EFL of the optical lens to the first effective focal length is 0.6-3.0. For example, the absolute value can be 0.6, 0.8, 0.9, 1, 1.5, 1.8, 2, 2.5, 2.8, 2.9, or 3.0, etc. In this way, it is beneficial to aberration correction and size miniaturization of the optical lens.

[0131] It can be understood that, in some embodiments of the present application, the first lens group 110 can include four, five or more lenses. In some embodiments, the first lens group 110 can only include the first lens 101 and the first reflecting element 130. The fourth lens 104 is not necessary.

[0132] For example, the optical lens 100 further includes a second reflecting element 150 in some embodiments of the present application. The second reflecting element 150 is configured to reflect the light beam from the second lens group 120 to the imaging plane of the optical lens 100. For example, the second reflecting element 150 is configured to change the propagation direction of the light beam, so that the transmission direction of the light beam before and after reflection is perpendicular to each other. In this way, the second reflecting element 150 can fold the optical path of the optical lens 100 again. The size of the optical lens 100 along the optical axis direction of the second lens group 120 is reduced.

[0133] The embodiment of the present application does not limit the structure of the second reflecting element 150. Exemplarily, the second reflecting element 150 includes a lens and a reflecting film arranged on the surface of the lens.

[0134] In FIG. 3, the second mirror group 120 includes five lenses, i.e., the second lens 102, the third lens 103, the lens B1, the lens B2 and the lens B3. The second lens 102, the third lens 103, the lens B1, the lens B2 and the lens B3 are arranged in the order from the object side to the image side. The light beams from the first mirror group 110 pass through the second lens 102, the third lens 103, the lens B1, the lens B2 and the lens B3 in sequence and are transmitted to the second reflecting element 150.

[0135] In FIG. 3, the optical lens 100 further includes the lens C1 which is located on the image side of the second reflecting element 150 and is used for transmitting the light beams from the second reflecting element 150 to the optical sensor 202. The lens C1 can be a light-transmitting lens whose object side surface and image side surface are parallel, and the lens C1 can be regarded as a filter of the optical lens 100.

[0136] The parameters of the optical lens shown in FIG. 3 are listed in Table 1-1.

[0137] Table 1-1

[0138] Table 1-2 shows the optical parameters of the lenses in the optical lens shown in FIG. 3.

[0139] Table 1-2

[0140] In Table 1-2, the units of the radius of curvature and the center thickness are millimeters (mm), and the surface codes of the elements in Table 1-2 are shown in FIG. 3. The center thickness in Table 1-2 is the thickness of the optical element in the direction along the optical axis or the thickness of the air gap between the optical elements. The thickness corresponding to the row of the S1 surface of the first lens is the thickness of the first lens to the object surface in the direction along the optical axis, the thickness corresponding to the row of the S2 surface of the first lens is the distance from the S2 surface of the first lens to the S3 surface of the first reflecting element in the direction along the optical axis, and so on.

[0141] Table 1-3 shows the aspheric coefficients of the lenses in the optical lens 100 shown in FIG. 3.

[0142] Table 1-3

[0143] In Table 1-3, A4, A6, A8, A10 and A12 are the 4th, 6th, 8th, 10th and 12th aspheric coefficients, respectively.

[0144] The aspheric surface type Z of each lens in the optical lens can be calculated by the following aspheric formula:

[0145] wherein, the parameter c=1 / R, R is the curvature radius; r is the distance from a point on the optical surface to the optical axis, Z is the aspheric height of the point along the optical axis, k is the quadratic surface coefficient of the surface, i is the aspheric coefficient term, i is 12 in the embodiment, and Ai is the aspheric coefficient.

[0146] FIG. 4a is a curve diagram of the spherical aberration and the normalized aperture of the optical lens shown in FIG. 3. In FIG. 4a, the line p1 is the normalized aperture curve of the optical lens at the wavelength of 486 nm, the line p2 is the normalized aperture curve of the optical lens at the wavelength of 587 nm, and the line p3 is the normalized aperture curve of the optical lens at the wavelength of 656 nm. As can be seen from FIG. 4a, the spherical aberration of the optical lens shown in FIG. 3 is small at the wavelengths of 486 nm, 587 nm and 656 nm.

[0147] FIG. 4b is a field curvature diagram of the optical lens shown in FIG. 3. In FIG. 4b, the line T1 is the field curvature curve in the meridional (tan) direction at the wavelength of 656 nm, and the line S1 is the field curvature curve in the sagittal (sag) direction at the wavelength of 656 nm. The line T2 is the field curvature curve in the meridional direction at the wavelength of 587 nm, and the line S2 is the field curvature curve in the sagittal direction at the wavelength of 587 nm. The line T3 is the field curvature curve in the meridional direction at the wavelength of 486 nm, and the line S3 is the field curvature curve in the sagittal direction at the wavelength of 486 nm.

[0148] As can be seen from FIG. 4b, the field curvature of the optical lens shown in FIG. 3 is small at the wavelengths of 486 nm, 587 nm and 656 nm, and is less than -0.2%.

[0149] FIG. 4c is a distortion diagram of the optical lens shown in FIG. 3. In FIG. 4c, the distortion curves of the optical lens at the wavelengths of 486 nm, 587 nm and 656 nm overlap a lot, and the distortion amount is small, less than 1%.

[0150] In some embodiments of the present application, the number of the second lens group can be other.

[0151] FIG. 5 is a structural schematic diagram of another optical lens 100 and an optical sensor 202 provided by an embodiment of the present application. The difference between FIG. 5 and FIG. 3 includes that the second lens group 120 includes three lenses, which are the second lens 102, the third lens 103 and the lens B1.

[0152] In the example of FIG. 5, the optical lens 100 further comprises a third lens group 140, which comprises three lens pieces, i.e., lens piece C2, lens piece C3 and a second reflecting element 150. The lens piece C2 and the lens piece C3 are located on the object side of the second reflecting element 150. The lens piece C2 and the lens piece C3 transmit the light beams from the second lens group 120 to the second reflecting element 150.

[0153] The lens piece C1 is located on the image side of the second reflecting element 150, and is used for transmitting the light beams from the second reflecting element 150 to the optical sensor 202.

[0154] The remaining structures and the parameters of the optical lens 100 are described above with reference to FIG. 3.

[0155] The parameters of the optical lens 100 shown in FIG. 5 are shown in Table 2-1.

[0156] Table 2-1

[0157] Table 2-2 shows the optical parameters of the lens pieces in the optical lens shown in FIG. 5.

[0158] Table 2-2

[0159] In the table, the meanings of the parameters such as the radius of curvature and the thickness are also described above with reference to the example of FIG. 3, and will not be described herein again.

[0160] Table 2-3 shows the aspheric coefficients of the lens pieces in the optical lens 100 shown in FIG. 5.

[0161] Table 2-3

[0162] The aspheric surface type Z of the lens pieces in the optical lens can be calculated by the aspheric formula (1) described above.

[0163] FIG. 6a is a curve diagram of the spherical aberration and the normalized aperture of the optical lens shown in FIG. 5. In FIG. 6a, the line p1 is the normalized aperture curve of the optical lens at a wavelength of 486 nm, the line p2 is the normalized aperture curve of the optical lens at a wavelength of 587 nm, and the line p3 is the normalized aperture curve of the optical lens at a wavelength of 656 nm. As can be seen from FIG. 6a, the spherical aberration of the optical lens shown in FIG. 5 is small at the wavelengths of 486 nm, 587 nm and 656 nm.

[0164] Figure 6b is a field curvature diagram of the optical lens shown in Figure 5. In Figure 6b, line T1 is the field curvature curve of the meridional direction at the wavelength of 656 nm, and line S1 is the field curvature curve of the sagittal direction at the wavelength of 656 nm. Line T2 is the field curvature curve of the meridional direction at the wavelength of 587 nm, and line S2 is the field curvature curve of the sagittal direction at the wavelength of 587 nm. Line T3 is the field curvature curve of the meridional direction at the wavelength of 486 nm, and line S3 is the field curvature curve of the sagittal direction at the wavelength of 486 nm.

[0165] As can be seen from Figure 6b, the optical lens shown in Figure 5 has a small field curvature at the wavelengths of 486 nm, 587 nm and 656 nm, less than -0.2%.

[0166] Figure 6c is a distortion diagram of the optical lens shown in Figure 5. In Figure 6c, the distortion curves of the optical lens at the wavelengths of 486 nm, 587 nm and 656 nm overlap a lot, and the distortion amount is small, less than 1%.

[0167] Figure 7 is a structural schematic diagram of another optical lens 100 and an optical sensor 202 provided by an embodiment of the present application. The difference between Figure 7 and Figure 3 includes:

[0168] The second mirror group 120 includes six lenses, which are the second lens 102, the third lens 103, the lens B1, the lens B2, the lens B3 and the lens B4. The light beams from the first mirror group 110 pass through the second lens 102, the third lens 103, the lens B1, the lens B2, the lens B3 and the lens B4 in sequence to the lens C1. The lens C1 is used to transmit the light beams from the second mirror group 120 to the optical sensor 202.

[0169] In the example of Figure 7, the optical lens 100 does not include a second reflecting element.

[0170] The remaining structures and the parameters of the optical lens 100 can be referred to the description of Figure 3.

[0171] The parameters of the optical lens 100 shown in Figure 7 are shown in Table 3-1.

[0172] Table 3-1

[0173] Table 3-2 shows the optical parameters of each lens in the optical lens shown in Figure 7.

[0174] Table 3-2

[0175] In the table, the meanings of the parameters such as the radius of curvature and the thickness can also be referred to the description of the example of Figure 3, which will not be described here.

[0176] Table 3-3 shows the aspheric coefficients of each lens in the optical lens shown in Figure 7.

[0177] Table 3-3

[0178] The aspheric surface profile Z of each lens in the optical lens can be calculated by the aspheric formula (1) above.

[0179] FIG. 8a is a curve diagram of the spherical aberration and normalized aperture of the optical lens shown in FIG. 7. In FIG. 8a, the line p1 is the normalized aperture curve of the optical lens at a wavelength of 486 nm, the line p2 is the normalized aperture curve of the optical lens at a wavelength of 587 nm, and the line p3 is the normalized aperture curve of the optical lens at a wavelength of 656 nm. As can be seen from FIG. 8a, the spherical aberration of the optical lens shown in FIG. 7 is small at wavelengths of 486 nm, 587 nm, and 656 nm.

[0180] FIG. 8b is a field curvature diagram of the optical lens shown in FIG. 7. In FIG. 8b, the line T1 is the field curvature curve in the meridional direction at a wavelength of 656 nm, and the line S1 is the field curvature curve in the sagittal direction at a wavelength of 656 nm. The line T2 is the field curvature curve in the meridional direction at a wavelength of 587 nm, and the line S2 is the field curvature curve in the sagittal direction at a wavelength of 587 nm. The line T3 is the field curvature curve in the meridional direction at a wavelength of 486 nm, and the line S3 is the field curvature curve in the sagittal direction at a wavelength of 486 nm.

[0181] As can be seen from FIG. 8b, the field curvature of the optical lens shown in FIG. 7 is small at wavelengths of 486 nm, 587 nm, and 656 nm, and is less than -0.2%.

[0182] FIG. 8c is a distortion diagram of the optical lens shown in FIG. 7. In FIG. 8c, the distortion curves of the optical lens at wavelengths of 486 nm, 587 nm, and 656 nm overlap a large amount, and the distortion amount is small, less than 1%.

[0183] FIG. 9 is a structural schematic diagram of another optical lens 100 and optical sensor 202 provided by an embodiment of the present application. The difference between FIG. 9 and FIG. 3 includes:

[0184] The second lens group 120 includes four lenses, which are the second lens 102, the third lens 103, the lens B1, and the lens B2. The optical lens 100 does not include a second reflective element. The light beam from the first lens group 110 is transmitted to the lens C1 after sequentially passing through the second lens 102, the third lens 103, the lens B1, and the lens B2.

[0185] The remaining structures and the parameters of the optical lens 100 can be referred to the descriptions in FIG. 3 above.

[0186] The parameters of the optical lens 100 shown in FIG. 9 are shown in Table 4-1.

[0187] Table 4-1

[0188] Table 4-2 shows optical parameters of each lens in the optical lens shown in FIG. 9.

[0189] Table 4-2

[0190] In the table, the meanings of the parameters such as the radius of curvature and the thickness can also be referred to the description of the example shown in FIG. 3, which will not be repeated here.

[0191] Table 4-3 shows aspherical coefficients of each lens in the optical lens shown in FIG. 9.

[0192] Table 4-3

[0193] The aspherical surface of each lens in the optical lens can be calculated by the aspherical formula (1) above.

[0194] FIG. 10a is a curve diagram of the spherical aberration and the normalized aperture of the optical lens shown in FIG. 9. In FIG. 10a, the line p1 is the normalized aperture curve of the optical lens at the wavelength of 486 nm, the line p2 is the normalized aperture curve of the optical lens at the wavelength of 587 nm, and the line p3 is the normalized aperture curve of the optical lens at the wavelength of 656 nm. As can be seen from FIG. 10a, the spherical aberration of the optical lens shown in FIG. 9 is small at the wavelengths of 486 nm, 587 nm and 656 nm.

[0195] FIG. 10b is a field curvature diagram of the optical lens shown in FIG. 9. In FIG. 10b, the line T1 is the field curvature curve in the meridional direction at the wavelength of 656 nm, the line S1 is the field curvature curve in the sagittal direction at the wavelength of 656 nm. The line T2 is the field curvature curve in the meridional direction at the wavelength of 587 nm, the line S2 is the field curvature curve in the sagittal direction at the wavelength of 587 nm. The line T3 is the field curvature curve in the meridional direction at the wavelength of 486 nm, and the line S3 is the field curvature curve in the sagittal direction at the wavelength of 486 nm.

[0196] As can be seen from FIG. 10b, the field curvature of the optical lens shown in FIG. 9 is small at the wavelengths of 486 nm, 587 nm and 656 nm, less than -0.2%.

[0197] FIG. 10c is a distortion diagram of the optical lens shown in FIG. 9. In FIG. 10c, the distortion curves of the optical lens at the wavelengths of 486 nm, 587 nm and 656 nm overlap a lot, and the distortion amount is small, less than 1%.

[0198] FIG. 11 is a structural schematic diagram of another optical lens 100 and an optical sensor 202 provided by an embodiment of the present application. The difference between FIG. 11 and FIG. 3 includes:

[0199] The first lens group 110 does not include the fourth lens, and the first reflecting element 130 is a reflecting mirror.

[0200] The second mirror group 120 includes four lenses, i.e., the second lens 102, the third lens 103, the lens B1 and the lens B2. The light beam from the first mirror group 110 is transmitted to the third mirror group 140 in sequence through the second lens 102, the third lens 103, the lens B1 and the lens B2.

[0201] The third mirror group 140 includes three lenses, i.e., the lens C2, the lens C3 and the second reflecting element 150. The lens C2 and the lens C3 are located at the object side of the second reflecting element 150. The light beam from the second mirror group 120 is transmitted to the second reflecting element 150 in sequence through the lens C2 and the lens C3, and then reflected by the second reflecting element 150 to the lens C1 and then transmitted to the optical sensor 202.

[0202] The remaining structures and the parameters of the optical lens 100 are described in the foregoing description of FIG. 3.

[0203] The parameters of the optical lens 100 shown in FIG. 11 are shown in Table 5-1.

[0204] Table 5-1

[0205] Table 5-2 shows the optical parameters of the lenses in the optical lens shown in FIG. 11.

[0206] Table 5-2

[0207] In the table, the meanings of the parameters such as the radius of curvature and the thickness are also described in the foregoing description of the example shown in FIG. 3, which will not be described again here. Table 5-3 shows the aspheric coefficients of the lenses in the optical lens shown in FIG. 11.

[0208] Table 5-3

[0209] The aspheric surface type Z of the lenses in the optical lens can be calculated by the aspheric formula (1) described above.

[0210] FIG. 12a is a curve diagram of the spherical aberration and the normalized aperture of the optical lens shown in FIG. 11. In FIG. 12a, the line p1 is the normalized aperture curve of the optical lens at a wavelength of 486 nm, the line p2 is the normalized aperture curve of the optical lens at a wavelength of 587 nm, and the line p3 is the normalized aperture curve of the optical lens at a wavelength of 656 nm. As can be seen from FIG. 12a, the spherical aberration of the optical lens shown in FIG. 11 is small at wavelengths of 486 nm, 587 nm and 656 nm.

[0211] Figure 12b is a field curvature diagram of the optical lens shown in Figure 11. In Figure 12b, line T1 is the field curvature curve of the meridional direction at the wavelength of 656 nm, line S1 is the field curvature curve of the sagittal direction at the wavelength of 656 nm. Line T2 is the field curvature curve of the meridional direction at the wavelength of 587 nm, line S2 is the field curvature curve of the sagittal direction at the wavelength of 587 nm. Line T3 is the field curvature curve of the meridional direction at the wavelength of 486 nm, line S3 is the field curvature curve of the sagittal direction at the wavelength of 486 nm.

[0212] As shown in Figure 12b, the optical lens shown in Figure 11 has small field curvature at the wavelengths of 486 nm, 587 nm and 656 nm, less than -0.2%.

[0213] Figure 12c is a distortion diagram of the optical lens shown in Figure 11. In Figure 12c, the optical lens has large overlapping amount of distortion curves at the wavelengths of 486 nm, 587 nm and 656 nm, and small distortion amount, less than 1%.

[0214] Figure 13 is a structural schematic diagram of an optical lens 100 and an optical sensor 202 provided in an embodiment of the present application. The difference between Figure 13 and Figure 3 includes:

[0215] The first lens group 110 does not include a fourth lens, and the first reflecting element 130 is a reflecting mirror.

[0216] The second lens group 120 includes four lenses, which are the second lens 102, the third lens 103, a lens B1 and a lens B2. The light beam from the first lens group 110 is transmitted to the third lens group 140 in sequence through the second lens 102, the third lens 103, the lens B1 and the lens B2.

[0217] The third lens group 140 includes two lenses, which are a lens C3 and a lens C2. The optical lens 100 does not include a second reflecting element. The light beam from the second lens group 120 is transmitted to the lens C1 in sequence through the lens C2 and the lens C3.

[0218] The remaining structures and the parameters of the optical lens 100 are described in the foregoing Figure 3.

[0219] The parameters of the optical lens 100 shown in Figure 13 are shown in Table 6-1.

[0220] Table 6-1

[0221] Table 6-2 shows the optical parameters of each lens in the optical lens shown in Figure 13.

[0222] Table 6-2

[0223] In the table, the meanings of the parameters such as the radius of curvature and the thickness can also be seen from the description of the example in FIG. 3, which will not be repeated here. Table 6-3 shows the aspheric coefficients of the lenses in the optical lens shown in FIG. 13.

[0224] Table 6-3

[0225] The aspheric surface profile Z of each lens in the optical lens can be calculated by the aspheric formula (1) described above.

[0226] FIG. 14a is a graph of the spherical aberration and the normalized aperture of the optical lens shown in FIG. 13. In FIG. 14a, the line p1 is the normalized aperture curve of the optical lens at a wavelength of 486 nm, the line p2 is the normalized aperture curve of the optical lens at a wavelength of 587 nm, and the line p3 is the normalized aperture curve of the optical lens at a wavelength of 656 nm. As can be seen from FIG. 14a, the spherical aberration of the optical lens shown in FIG. 13 is small at wavelengths of 486 nm, 587 nm, and 656 nm.

[0227] FIG. 14b is a graph of the field curvature of the optical lens shown in FIG. 13. In FIG. 14b, the line T1 is the field curvature curve in the meridional direction at a wavelength of 656 nm, and the line S1 is the field curvature curve in the sagittal direction at a wavelength of 656 nm. The line T2 is the field curvature curve in the meridional direction at a wavelength of 587 nm, and the line S2 is the field curvature curve in the sagittal direction at a wavelength of 587 nm. The line T3 is the field curvature curve in the meridional direction at a wavelength of 486 nm, and the line S3 is the field curvature curve in the sagittal direction at a wavelength of 486 nm.

[0228] As can be seen from FIG. 14b, the field curvature of the optical lens shown in FIG. 13 is small at wavelengths of 486 nm, 587 nm, and 656 nm, and is less than -0.2%.

[0229] FIG. 14c is a graph of the distortion of the optical lens shown in FIG. 13. In FIG. 14c, the distortion curves of the optical lens at wavelengths of 486 nm, 587 nm, and 656 nm overlap a lot, and the distortion is small, less than 1%.

[0230] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An optical lens characterized in that, The optical lens comprises a first lens group and a second lens group; The first lens group is located on the object side of the second lens group; during focusing, the second lens group moves along the optical axis of the second lens group; The lens closest to the object side in the first lens group is a first lens, and the optical power of the first lens is negative; the first lens group further comprises a first reflecting element, which is used for reflecting the light beam from the first lens to the second lens group; The second lens group comprises a second lens and a third lens; the second lens is the lens closest to the object side in the second lens group, and the optical power of the second lens is positive; the third lens is used for receiving the light beam from the second lens, and the optical power of the third lens is negative; The optical lens satisfies the following relationship: 0.4≤effective focal length of the optical lens / full image height of the optical lens≤1.

3.

2. The optical lens of claim 1, wherein, The optical lens further satisfies the following relationship: 1.2≤total optical length of the optical lens / full image height of the optical lens.

3. The optical lens according to claim 1 or 2, characterized in that, The optical power of the second lens group is positive.

4. The optical lens according to any one of claims 1 to 3, characterized in that, The third lens is the lens closest to the second lens in the second lens group.

5. The optical lens according to any one of claims 1 to 4, characterized in that, The first lens group further comprises a fourth lens, and the optical power of the fourth lens is positive; The first reflecting element is used for reflecting the light beam from the first lens to the fourth lens, and the fourth lens is used for emitting the light beam from the first reflecting element to the second lens group. The optical lens further satisfies the following relationship:

6. The optical lens of claim 5, wherein, 0.6≤|effective focal length of the optical lens / first effective focal length|≤3.0; The first effective focal length is the effective focal length of the combination of the fourth lens and the second lens. The optical lens is in a first state, and the first lens group rotates around a virtual axis; the optical axis of the first lens and the optical axis of the second lens group are both perpendicular to the virtual axis.

7. The optical lens according to any one of claims 1 to 6, characterized in that, The maximum angle of rotation of the first lens group is Gp1T, and the optical axis rotation angle of the first lens group caused by the rotation of the first lens group is OARA; 8. The optical lens of claim 7, wherein, The optical lens further satisfies the following relationship: 2.0≤Gp1T / OARA. The optical lens further comprises a second reflecting element located on the image side of the second lens group; the second reflecting element is used for reflecting the light beam from the second lens group to the imaging surface of the optical lens.

9. The optical lens of any of claims 1-8, wherein, The optical lens further satisfies the following relationship:

10. The optical lens of any of claims 1-9, wherein, 0 The optical lens further satisfies the following relationship:

11. The optical lens of any of claims 1-10, wherein, 1.0≤|effective focal length of the first lens group / effective focal length of the optical lens|≤11.

0. The optical lens further satisfies the following relationship:

12. The optical lens of any of claims 1-11, wherein, 0.1≤|effective focal length of the first lens group / effective focal length of the second lens|≤13.

0. The optical lens further satisfies the following relationship:

13. The optical lens of any of claims 1-12, wherein, 0 The lens closest to the image side in the optical lens is a meniscus aspherical lens.

14. The optical lens of any of claims 1-13, wherein, ​ 15. The optical lens of any of claims 1-14, wherein, The optical lens comprises five or more aspheric lenses.

16. A lens module, characterized by, The optical lens comprises an optical sensor on the image side of the lens module, the optical lens being configured to project an image onto the optical sensor, the optical sensor being configured to convert the image into digital image data.

17. An electronic device, comprising: The optical lens comprises: A housing and the lens module of claim 16, the lens module being arranged on the housing.

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