Optical lens, camera module and electronic equipment

Abstract

The present application relates to the technical field of electronic equipment, and discloses an optical lens, a camera module and an electronic device, which are used to reduce the size of the optical lens while ensuring the imaging quality of the optical lens. The optical lens includes at least seven lenses with optical power arranged from the object side to the image side, and along the direction from the object side to the image side, the first lens has positive optical power, the object side surface of the first lens is convex near the optical axis, and the image side surface is concave near the optical axis; the last lens has negative optical power; the back focal length BFL of the optical lens satisfies: BFL≤2.5mm; the point farthest from the imaging surface of the optical lens in the projection point of the optical axis of the optical lens on the object side surface of the first lens is O1, and the point closest to the imaging surface in the projection point of the optical axis on the image side surface of the last lens is Ox, the distance between O1 and Ox is TTL1, and TTL1 and the image height IH of the optical lens satisfy: TTL1 / IH≤0.57.

Description

Technical Field

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

[0002] With the development of smart terminal technology and the diversified consumption needs, users have higher and higher requirements for mobile phone photography. The performance parameters of mobile phone lenses that affect the image quality, such as the target surface, depth of field, and resolution, need to be further improved. At the same time, due to the trend of thinning mobile phones and the demand for folding phone applications, the total length of mobile phone lenses has also become an important factor restricting the overall thickness of mobile phones. For mobile phone lenses with large target surfaces, the total length of the lens is the main factor affecting the image quality, and current mobile phone lenses often find it difficult to take into account the design requirements of both the target surface and the total length. Summary of the invention

[0003] The present application provides an optical lens, a camera module and an electronic device, which are used to reduce the size of the optical lens while ensuring the imaging quality of the optical lens.

[0004] In the first aspect, the present application provides an optical lens, which may include at least seven lenses with optical power, and the at least seven lenses are arranged in sequence from the object side to the image side. In the specific setting, along the direction from the object side to the image side, the first lens has positive optical power, the object side surface of the first lens is convex at the near optical axis, and the image side surface is concave at the near optical axis; the last lens has negative optical power. The back focal length BFL of the optical lens can satisfy: BFL≤2.5mm. In addition, the point farthest from the imaging surface of the optical lens in the projection point of the optical axis of the optical lens on the object side surface of the first lens is defined as O1, and the point closest to the imaging surface in the projection point of the optical axis on the image side surface of the last lens is defined as Ox, where x is the number of lenses, the distance between O1 and Ox is TTL1, and the image height that can be formed by TTL1 and the optical lens on its imaging surface satisfies: TTL1 / IH≤0.57.

[0005] The optical lens in the above scheme can be applied to a camera module with a pop-up design. The total length of the optical lens in the non-pop-up state of the camera module is relatively small, which is conducive to the thin design of the electronic device using the camera module; in addition, the optical lens has a relatively long back focus in the pop-up state of the camera module, which facilitates the focus or zoom operation of the camera module and helps the camera module achieve better shooting effects.

[0006] In some possible implementations, the optical lens may further include a variable aperture, which is disposed on the object side of the first lens arranged along the object side to the image side, and the light-passing diameter of the variable aperture is adjustable, thereby achieving adjustment of the aperture number of the optical lens.

[0007] In some possible implementation schemes, the maximum entrance pupil diameter EPDmax, the minimum entrance pupil diameter EPDmin and the focal length EFL of the optical lens can satisfy: 1.6≤EFL / (EPDmax-EPDmin)≤3. The size of the entrance pupil diameter can be achieved by adjusting the variable aperture. With this design, the optical lens can provide different depth of field ranges for different scenes, thus taking into account the shooting needs of multiple scenes.

[0008] In some possible implementations, along the direction from the object side to the image side, the focal length f1 of the first lens and the focal length EFL of the optical lens satisfy: f1 / EFL≤1.3. By reasonably allocating the optical focal length, the optical lens can achieve better imaging quality.

[0009] In some possible implementations, the focal length EFL of the optical lens and the maximum half field of view HFOV of the optical lens satisfy: EFL×tan(HFOV)≥7mm. With this design, the camera module can have a larger target surface, which is beneficial to improving imaging brightness and resolution.

[0010] In some possible implementations, the total length TTL of the optical lens, the image height IH that the optical lens can form on its imaging surface, and the aperture number F# of the optical lens satisfy: IH 2 / (TTL 2 ×F#)≥1.2, which can increase the amount of light entering the optical lens and is conducive to the thin design of the optical lens.

[0011] In some possible implementation schemes, the aperture number F# of the optical lens and the image height IH that can be formed by the optical lens on its imaging surface satisfy: IH / (4×F#)≥1.85. Under this condition, the target surface of the optical lens can be enlarged and the amount of light entering the optical lens can be increased.

[0012] In some possible implementations, along the direction from the object side to the image side, the refractive index n2 of the second lens satisfies: 1.6≤n2≤2.1. By designing the second lens to have a higher refractive index, it is beneficial to correct the aberration of the optical lens.

[0013] In some possible implementations, along the direction from the object side to the image side, the Abbe coefficient vd1 of the first lens and the Abbe coefficient vd2 of the second lens satisfy: |vd1-vd2|≥40. By rationally allocating the system material distribution, the chromatic aberration of the optical lens can be reduced and the image quality of the optical lens can be improved.

[0014] In some possible embodiments, along the direction from the object side to the image side, at least one of the object side surface and the image side surface of the penultimate lens can be a reverse curved surface, which helps to improve the edge field of view image quality of the camera module.

[0015] Similarly, along the direction from the object side to the image side, at least one of the object side surface and the image side surface of the last lens can also be an inversely curved surface to further improve the edge field of view image quality of the camera module.

[0016] In some possible implementations, the total length TTL of the optical lens and the back focal length BFL of the optical system may satisfy: 5≤TTL / BFL≤8. This design can ensure that the optical lens has a longer back focal length, providing space for a pop-up design of a camera module using the optical lens.

[0017] In some possible implementations, the intersection of the image side surface of the first lens arranged from the object side to the image side and the optical axis of the optical lens is defined as O1. 1 , the edge of the image side surface of the first lens is projected at point O1 on the optical axis 2 , O1 1 With O1 2 The distance between them is sag1; the intersection point between the object side surface of the second lens arranged from the object side to the image side and the optical axis is defined as O2 1 , the projection point of the edge of the object side surface of the second lens on the optical axis is O2 2 , O2 1 With O2 2 The distance between them is sag2; the distance between the image side surface of the first lens and the object side of the second lens on the optical axis is defined as T12; sag1, sag2 and T12 can satisfy: T12-sag1+sag2≥0.35mm, which can provide structural space for optical lens coupling and improve the imaging quality of the optical lens.

[0018] In some possible implementations, the entrance pupil diameter EPD of the optical lens and the half image height ImgH that the optical lens can form on its imaging surface satisfy: 0.5≤EPD / ImgH≤0.8. Under this condition, the optical lens can achieve a large aperture design, thereby increasing the amount of light entering the optical lens.

[0019] In some possible implementations, along the direction from the object side to the image side, the center thickness CT2 of the second lens and the edge thickness ET2 of the second lens satisfy: 0.8≤CT2 / ET2≤1.1, so as to ensure the processability of the second lens and improve the yield of the optical lens.

[0020] The following takes an optical lens including seven lenses as an example to illustrate several specific structural forms of the optical lens. It should be noted that, along the direction from the object side to the image side, the seven lenses of the optical lens are respectively the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens.

[0021] TTL1 and the image height IH of the optical lens satisfy: TTL1 / IH=0.49, wherein TTL1 is the distance between the point O1 farthest from the imaging plane among the projection points of the object side surface of the first lens on the optical axis and the point O7 closest to the imaging plane among the projection points of the image side surface of the seventh lens on the optical axis; the first lens has positive optical power, and the focal length f1 of the first lens and the focal length EFL of the optical lens satisfy: f1 / EFL=1.26; the second lens has positive optical power, and the focal length f2 of the second lens and the focal length EFL of the optical lens satisfy: f2 / EFL=282; the refractive index n2 of the second lens is 2.011; the Abbe coefficient vd1 of the first lens and the Abbe coefficient vd2 of the second lens: vd1-vd2=75.8; the third lens has negative focal power; the fourth lens has positive focal power; the focal length f3 of the third lens, the focal length f4 of the fourth lens and the focal length EFL of the optical lens satisfy: EFL×(f3+f4) / (f3-f4)=-0.43095; the fifth lens has positive focal power, and the focal length f5 of the fifth lens and the focal length EFL of the optical lens satisfy: f5 / EFL=7.57; the sixth lens has positive focal power, and the focal length f6 of the sixth lens and the focal length EFL of the optical lens satisfy: f6 / EFL=1.3; the seventh lens has negative focal power, and the focal length f7 of the seventh lens and the focal length EFL of the optical lens satisfy: f7 / EFL=-0.72.

[0022] Alternatively, TTL1 and the image height IH that can be formed by the optical lens on its imaging surface satisfy: TTL1 / IH=0.505, wherein TTL1 is the distance between the point O1 farthest from the imaging surface among the projection points of the object side surface of the first lens on the optical axis and the point O7 closest to the imaging surface among the projection points of the image side surface of the seventh lens on the optical axis; the first lens has positive optical power, and the focal length f1 of the first lens and the focal length EFL of the optical lens satisfy: f1 / EFL=1.125; the second lens has negative optical power, and the focal length f2 of the second lens and the focal length EFL of the optical lens satisfy: f2 / EFL=-13.9; the refractive index n2 of the second lens is 1.677; the Abbe coefficient vd1 of the first lens and the Abbe coefficient of the second lens vd2 satisfies: vd1-vd2=75.8; the third lens has negative optical power; the fourth lens has positive optical power; the focal length f3 of the third lens, the focal length f4 of the fourth lens and the focal length EFL of the optical lens satisfy: EFL×(f3+f4) / (f3-f4)=-0.74464; the fifth lens has positive optical power, and the focal length f5 of the fifth lens and the focal length EFL of the optical lens satisfy: f5 / EFL=2.6972; the sixth lens has positive optical power, and the focal length f6 of the sixth lens and the focal length EFL of the optical lens satisfy: f6 / EFL=2.847; the seventh lens has negative optical power, and the focal length f7 of the seventh lens and the focal length EFL of the optical lens satisfy: f7 / EFL=-0.881.

[0023] Alternatively, TTL1 and the image height IH that can be formed by the optical lens on its imaging surface satisfy: TTL1 / IH=0.506, wherein TTL1 is the distance between the point O1 farthest from the imaging surface among the projection points of the object side surface of the first lens on the optical axis and the point O7 closest to the imaging surface among the projection points of the image side surface of the seventh lens on the optical axis; the first lens has positive optical power, and the focal length f1 of the first lens and the focal length EFL of the optical lens satisfy: f1 / EFL=1.036; the second lens has negative optical power, and the focal length f2 of the second lens and the focal length EFL of the optical lens satisfy: f2 / EFL=-5.24; the refractive index n2 of the second lens is 1.677; the Abbe coefficient vd1 of the first lens and the Abbe coefficient of the second lens The number vd2 satisfies: vd1-vd2=62.32; the third lens has negative optical power; the fourth lens has positive optical power; the focal length f3 of the third lens, the focal length f4 of the fourth lens and the focal length EFL of the optical lens satisfy: EFL×(f3+f4) / (f3-f4)=0.1578; the fifth lens has negative optical power, and the focal length f5 of the fifth lens and the focal length EFL of the optical lens satisfy: f5 / EFL=-1.519; the sixth lens has positive optical power, and the focal length f6 of the sixth lens and the focal length EFL of the optical lens satisfy: f6 / EFL=0.755; the seventh lens has negative optical power, and the focal length f7 of the seventh lens and the focal length EFL of the optical lens satisfy: f7 / EFL=-1.016.

[0024] Alternatively, TTL1 and the image height IH that can be formed by the optical lens on its imaging surface satisfy: TTL1 / IH=0.51, wherein TTL1 is the distance between the point O1 farthest from the imaging surface among the projection points of the object side surface of the first lens on the optical axis and the point O7 closest to the imaging surface among the projection points of the image side surface of the seventh lens on the optical axis; the first lens has positive optical power, and the focal length f1 of the first lens and the focal length EFL of the optical lens satisfy: f1 / EFL=1.19; the second lens has negative optical power, and the focal length f2 of the second lens and the focal length EFL of the optical lens satisfy: f2 / EFL=-10.38; the refractive index n2 of the second lens is 1.677; the Abbe coefficient vd1 of the first lens and the Abbe coefficient of the second lens vd2 satisfies: vd1-vd2=58.76; the third lens has negative optical power; the fourth lens has positive optical power; the focal length f3 of the third lens, the focal length f4 of the fourth lens and the focal length EFL of the optical lens satisfy: EFL×(f3+f4) / (f3-f4)=-0.436; the fifth lens has negative optical power, and the focal length f5 of the fifth lens and the focal length EFL of the optical lens satisfy: f5 / EFL=-1.749; the sixth lens has positive optical power, and the focal length f6 of the sixth lens and the focal length EFL of the optical lens satisfy: f6 / EFL=0.6535; the seventh lens has negative optical power, and the focal length f7 of the seventh lens and the focal length EFL of the optical lens satisfy: f7 / EFL=-0.796.

[0025] Alternatively, TTL1 and the image height IH that can be formed by the optical lens on its imaging surface satisfy: TTL1 / IH=0.49, wherein TTL1 is the distance between the point O1 farthest from the imaging surface among the projection points of the object side surface of the first lens on the optical axis and the point O7 closest to the imaging surface among the projection points of the image side surface of the seventh lens on the optical axis; the first lens has positive optical power, and the focal length f1 of the first lens and the focal length EFL of the optical lens satisfy: f1 / EFL=1.138; the second lens has negative optical power, and the focal length f2 of the second lens and the focal length EFL of the optical lens satisfy: f2 / EFL=-9.22; the refractive index n2 of the second lens is 1.677; the Abbe coefficient vd1 of the first lens and the Abbe coefficient of the second lens The number vd2 satisfies: vd1-vd2=75.85; the third lens has negative optical power; the fourth lens has positive optical power; the focal length f3 of the third lens, the focal length f4 of the fourth lens and the focal length EFL of the optical lens satisfy: EFL×(f3+f4) / (f3-f4)=1.006; the fifth lens has positive optical power, and the focal length f5 of the fifth lens and the focal length EFL of the optical lens satisfy: f5 / EFL=23.05; the sixth lens has positive optical power, and the focal length f6 of the sixth lens and the focal length EFL of the optical lens satisfy: f6 / EFL=1.077; the seventh lens has negative optical power, and the focal length f7 of the seventh lens and the focal length EFL of the optical lens satisfy: f7 / EFL=-0.602.

[0026] Alternatively, TTL1 and the image height IH that can be formed by the optical lens on its imaging surface satisfy: TTL1 / IH=0.49, wherein TTL1 is the distance between the point O1 farthest from the imaging surface among the projection points of the object side surface of the first lens on the optical axis and the point O7 closest to the imaging surface among the projection points of the image side surface of the seventh lens on the optical axis; the first lens has positive optical power, and the focal length f1 of the first lens and the focal length EFL of the optical lens satisfy: f1 / EFL=1.14; the second lens has negative optical power, and the focal length f2 of the second lens and the focal length EFL of the optical lens satisfy: f2 / EFL=-10.1; the refractive index n2 of the second lens is 1.677; the Abbe coefficient vd1 of the first lens and the Abbe coefficient of the second lens The number vd2 satisfies: vd1-vd2=75.85; the third lens has negative optical power; the fourth lens has positive optical power; the focal length f3 of the third lens, the focal length f4 of the fourth lens and the focal length EFL of the optical lens satisfy: EFL×(f3+f4) / (f3-f4)=1.22; the fifth lens has negative optical power, and the focal length f5 of the fifth lens and the focal length EFL of the optical lens satisfy: f5 / EFL=-2.46; the sixth lens has positive optical power, and the focal length f6 of the sixth lens and the focal length EFL of the optical lens satisfy: f6 / EFL=0.845; the seventh lens has negative optical power, and the focal length f7 of the seventh lens and the focal length EFL of the optical lens satisfy: f7 / EFL=-0.694.

[0027] In the second aspect, the present application also provides a camera module, which may include a photosensitive chip and an optical lens in any of the above possible implementations, the photosensitive chip may be arranged on the imaging surface of the optical lens, and the photosensitive chip may be used to convert the light signal transmitted by the optical lens into an image signal. The camera module has a good shooting effect and can take into account the shooting needs of different scenes.

[0028] In a third aspect, the present application further provides an electronic device, which may include a housing and a camera module in the aforementioned embodiment, wherein the camera module is disposed in the housing, and the camera module has a first state in which the camera module is located inside the housing, and a second state in which the camera module is at least partially ejected outside the housing. The height of the camera module of the electronic device in the first state is relatively small, thus helping to achieve a thin design of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0030] Figure 2 for Figure 1 A partial exploded schematic diagram of the electronic equipment;

[0031] Figure 3 for Figure 1 A partial cross-sectional view of the electronic device at AA;

[0032] Figure 4 A schematic diagram of a reference structure of an optical lens provided in an embodiment of the present application;

[0033] Figure 5 A schematic diagram of the structure of a first optical lens provided in an embodiment of the present application;

[0034] Figure 6 Axial chromatic aberration curve diagram of the first optical lens provided in the embodiment of the present application;

[0035] Figure 7 An optical distortion curve diagram of the first optical lens provided in an embodiment of the present application;

[0036] Figure 8 A schematic diagram of the structure of a second optical lens provided in an embodiment of the present application;

[0037] Fig. 9 Axial chromatic aberration curve diagram of the second optical lens provided in the embodiment of the present application;

[0038] Fig.10 An optical distortion curve diagram of the second optical lens provided in an embodiment of the present application;

[0039] Fig.11 A schematic diagram of the structure of a third optical lens provided in an embodiment of the present application;

[0040] Fig.12 Axial chromatic aberration curve diagram of the third optical lens provided in the embodiment of the present application;

[0041] Fig.13 An optical distortion curve diagram of the third optical lens provided in an embodiment of the present application;

[0042] Fig.14 A schematic diagram of the structure of a fourth optical lens provided in an embodiment of the present application;

[0043] Fig.15 Axial chromatic aberration curve diagram of the fourth optical lens provided in the embodiment of the present application;

[0044] Fig.16 An optical distortion curve diagram of the fourth optical lens provided in an embodiment of the present application;

[0045] Fig.17 A schematic diagram of the structure of a fifth optical lens provided in an embodiment of the present application;

[0046] Fig.18 Axial chromatic aberration curve diagram of the fifth optical lens provided in the embodiment of the present application;

[0047] Fig.19 An optical distortion curve diagram of the fifth optical lens provided in an embodiment of the present application;

[0048] Fig. 20 A schematic diagram of the structure of a fourth optical lens provided in an embodiment of the present application;

[0049] Fig.21 Axial chromatic aberration curve diagram of the fourth optical lens provided in the embodiment of the present application;

[0050] Fig. 22 This is a graph showing the optical distortion of the sixth optical lens provided in an embodiment of the present application.

[0051] Reference numerals:

[0052] 1-electronic device; 100-housing; 200-display screen; 300-circuit board; 400-camera module; 110-middle frame; 120-back cover; 210-display panel; 220-first cover plate; 310-avoidance space; 121-light inlet; 122-camera decoration; 123-second cover plate; 410-optical lens; 420-module circuit board; 430-photosensitive chip; 440-filter; 421-sink; 450-support. DETAILED DESCRIPTION

[0053] To facilitate understanding of the optical lens provided in the embodiments of the present application, firstly, a brief description of the relevant English abbreviations and noun concepts involved in the present application is given:

[0054] F#F-number F number / aperture is the relative value obtained by the focal length of the optical lens / the diameter of the entrance pupil of the optical lens (the inverse of the relative aperture). The larger the aperture, the smaller the F value (F#), the more light enters in the same unit time, the smaller the depth of field, and the background content of the photo will be blurred, similar to the effect of a telephoto lens;

[0055] EFL effect focal length, effective focal length of optical lens;

[0056] BFL back focal length, the back focal length of the optical lens, is defined as the distance from the lens closest to the imaging surface to the photosensitive chip;

[0057] TTL total track length, the total length of the optical lens, specifically refers to the distance from the surface of the optical lens closest to the subject to the imaging surface;

[0058] EPD entrance pupil diameter, entrance pupil diameter, limits the size of the effective aperture of the incident light beam;

[0059] IH image height, image height, is the total image height of the image formed by the optical lens on the imaging surface;

[0060] FOV field of view, the angle between the two edges of the maximum range of the optical lens through which the image of the object can pass, with the optical lens as the vertex, or it can be understood as the maximum field of view that the optical lens can image;

[0061] HFOV Half-FOV, half field of view;

[0062] The focal power is equal to the difference between the convergence of the image-side beam and the convergence of the object-side beam. A lens with positive focal power has a positive focal length, which can gather light; a lens with negative focal power has a negative focal length, which can diverge light.

[0063] The object side can be understood as the side close to the object being photographed, and the image side can be understood as the side close to the imaging surface;

[0064] The object side surface of the lens is the side surface of the lens close to the object being photographed, and the image side surface of the lens is the side surface of the lens close to the imaging surface;

[0065] The near optical axis can be understood as the area of ​​the lens surface close to the optical axis.

[0066] Please refer to Figure 1 As shown, Figure 1 The electronic device 1 may be a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a camera, a personal computer, a notebook computer, a vehicle-mounted device, a wearable device, augmented reality (AR) glasses, an AR helmet, virtual reality (VR) glasses or a VR helmet, or other devices with photo and video functions. Figure 1 The electronic device in the illustrated embodiment is described by taking a mobile phone as an example.

[0067] Figure 2 for Figure 1 Please also refer to the partial exploded diagram of the electronic equipment in Figure 1 and Figure 2 The electronic device 1 may include a housing 100, a display screen 200, a circuit board 300 and a camera module 400. It should be noted that: Figure 1 , Figure 2 The following figures and the related drawings only schematically show some components of the electronic device 1, and the actual shapes, sizes, positions and structures of these components are not subject to Figure 1 , Figure 2 and the accompanying drawings below.

[0068] For ease of description, the width direction of the electronic device 1 is defined as the x-axis, the length direction of the electronic device is defined as the y-axis, and the thickness direction of the electronic device 1 is defined as the z-axis, wherein the x-axis, y-axis, and z-axis are perpendicular to each other. It is understandable that the coordinate system setting of the electronic device 1 can be flexibly set according to specific actual needs.

[0069] The housing 100 may include a middle frame 110 and a back cover 120, and the back cover 120 is fixed to one side of the middle frame 110. In one embodiment, the back cover 120 may be fixedly connected to the middle frame 110 by adhesive. In another embodiment, the back cover 120 and the middle frame 110 may also form an integral structure, that is, the back cover and the middle frame are an integral structure.

[0070] In other embodiments, the housing 100 may also include a middle plate (not shown in the figure). The middle plate is connected to the inner side of the middle frame 110 and is opposite to and spaced from the back cover 120 .

[0071] Please refer again Figure 2The display screen 200 is fixed to the other side of the middle frame 110 opposite to the back cover 120. At this time, the display screen 200 and the back cover 120 are arranged opposite to each other. The display screen 200, the middle frame 110 and the back cover 120 together surround the interior of the electronic device 1. The interior of the electronic device 1 can be used to place components of the electronic device 1, such as the circuit board 300, the camera module 400, the battery, the receiver, and the microphone.

[0072] In this embodiment, the display screen 200 can be used to display images, texts, etc. The display screen 200 can be a flat screen or a curved screen. The display screen 200 includes a display panel 210 and a first cover plate 220, and the first cover plate 220 is stacked on the side of the display panel 210 away from the middle frame 110. The first cover plate 220 can be arranged close to the display panel 210, and can be mainly used to protect and dustproof the display panel 210. The material of the first cover plate 220 is a transparent material, for example, it can be glass or plastic. The display panel 210 can adopt a liquid crystal display panel (liquid crystal display, LCD), an organic light-emitting diode (organic light-emitting diode, OLED) display panel, an active matrix organic light-emitting diode or an active matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED) display panel, a quantum dot light emitting diode (quantum dot light emitting diodes, QLED) display panel, or a micro light emitting diode (micro light emitting diode, Micro LED) display panel, etc.

[0073] Figure 3 for Figure 1 A partial cross-sectional view of the electronic device at AA in FIG. Figure 2 and Figure 3, the circuit board 300 is fixed inside the electronic device 1. Specifically, the circuit board 300 can be fixed to the side of the display screen 200 facing the back cover 120. In other embodiments, when the middle frame 110 includes a middle plate, the circuit board 300 can be fixed to the side surface of the middle plate facing the back cover 120. It can be understood that the circuit board 300 can be a hard circuit board, a flexible circuit board, or a hard-soft combination circuit board. The circuit board 300 can be used to carry electronic devices such as chips, capacitors, inductors, and can realize electrical connections between electronic devices, wherein the chip can be a central processing unit (CPU), a graphics processing unit (GPU), a digital signal processing chip (DSP), and a universal flash storage (UFS), etc.

[0074] Please continue to refer to Figure 2 and Figure 3 The camera module 400 is fixed in the housing 100, and is used to enable the electronic device 1 to realize functions such as taking photos or recording videos. Specifically, the camera module 400 can be fixed to the side of the display screen 200 facing the back cover 120. In other embodiments, when the middle frame 110 includes a middle plate, the camera module 400 can also be fixed to the side surface of the middle plate facing the back cover 120.

[0075] In addition, the circuit board 300 may be provided with an escape space 310, and the shape of the escape space 310 may be a shape matching the shape of the camera module 400, for example Figure 2 The rectangular shape shown. Of course, in other embodiments, the avoidance space 310 can also be circular, elliptical or other irregular shapes, etc., and the present application does not impose specific restrictions on this. The camera module 400 is located in the avoidance space 310. In this way, in the z-axis direction, the camera module 400 and the circuit board 300 have an overlapping area, thereby avoiding the increase in the thickness of the electronic device 1 due to the camera module 400 being stacked on the circuit board. In other embodiments, the circuit board 300 may also not be provided with the avoidance space 310. In this case, the camera module 400 can be directly stacked on the circuit board 300, or can be spaced apart from the circuit board 300 by other supporting structures.

[0076] In this embodiment, the camera module 400 is electrically connected to the circuit board 300. Specifically, the camera module 400 is electrically connected to the CPU through the circuit board 300. When the CPU receives the user's instruction, the CPU can send a signal to the camera module 400 through the circuit board 300 to control the camera module 400 to capture images or record videos. In other embodiments, when the electronic device 1 is not provided with the circuit board 300, the camera module 400 can also directly receive the user's instruction and capture images or record videos according to the user's instruction.

[0077] Please refer again Figure 3 The back cover 120 is provided with a light inlet 121, and the light inlet 121 can connect the interior of the electronic device 1 to the exterior of the electronic device 1. The electronic device 1 also includes a camera decoration 122 and a second cover plate 123. Part of the camera decoration 122 can be fixed to the inner surface of the back cover 120, and part of the camera decoration 122 contacts the hole wall of the light inlet 121. The second cover plate 123 is fixedly connected to the inner wall of the camera decoration 122. The camera decoration 122 and the second cover plate 123 separate the interior of the electronic device 1 from the exterior of the electronic device 1, thereby preventing external water or dust from entering the interior of the electronic device 1 through the light inlet 121. The material of the second cover plate 123 is a transparent material, for example, it can be glass or plastic.

[0078] It is understandable that the shape of the light inlet hole 121 is not limited to Figure 1 And attached Figure 2 For example, the shape of the light inlet hole 121 may also be an ellipse or other irregular shapes.

[0079] It is worth mentioning that in some other embodiments, the camera module 400 can also be fixed to the side of the back cover 120 facing the display screen 200. In this case, an opening can be set on the display panel 210, and the light outside the electronic device 1 can pass through the first cover plate 220 and the opening in turn to enter the interior of the electronic device 1, so as to be collected by the camera module 400 and form an image or video. In other words, the camera module 400 in this embodiment can be used as a front camera module or a rear camera module, and can be specifically set according to the functional requirements of the electronic device 1, which will not be described in detail here.

[0080] In some embodiments, the camera module 400 may include an optical lens 410, a module circuit board 420, a photosensitive chip 430, and a filter 440. It should be noted that the optical axis direction of the optical lens 410 is the same as the optical axis direction of the camera module 400.

[0081] Among them, the optical lens 410 can be installed between the subject (object plane) and the photosensitive chip 430 (image plane). The optical lens 410 is used to form an image of the subject (i.e., light signal), and the photosensitive chip 430 is used to convert the image of the subject (i.e., light signal) into an image signal and output it, so as to realize the photo taking or video recording function of the camera module.

[0082] The module circuit board 420 is fixed to the light-emitting side of the optical lens 410, that is, the module circuit board 420 is located on the image side of the optical lens 410. The module circuit board 420 can be electrically connected to the circuit board so that the signal can be transmitted between the circuit board and the module circuit board 420. It can be understood that the module circuit board 420 can be a hard circuit board, a flexible circuit board, or a hard-soft circuit board, and the present application does not limit this.

[0083] Please continue to refer to Figure 3 , the photosensitive chip 430 is fixed on the side of the module circuit board 420 facing the optical lens 410. The photosensitive chip 430 is electrically connected to the module circuit board 420, so that after the photosensitive chip 430 collects ambient light, the photosensitive chip 430 can generate a signal according to the ambient light, and transmit the signal to the circuit board through the module circuit board 420. In a specific implementation, the photosensitive chip 430 can be an image sensor such as a complementary metal-oxide-semiconductor (CMOS) or a charge coupled device (CCD).

[0084] In other embodiments, electronic components or other chips (such as driver chips) may also be installed on the module circuit board 420. The electronic components or other chips are arranged around the photosensitive chip 430. The electronic components or other chips are used to assist the photosensitive chip 430 in collecting ambient light and assist the photosensitive chip 430 in performing signal processing on the collected ambient light.

[0085] In other embodiments, the module circuit board 420 may be partially provided with a sink 421, and the photosensitive chip 430 may be installed in the sink 421. In this way, the photosensitive chip 430 and the module circuit board 420 have an overlapping area in the z-axis direction, and the camera module 400 may be set to be thinner in the z-axis direction.

[0086] Please continue to refer to Figure 3, the filter 440 is located on the side of the photosensitive chip 430 facing the optical lens 410. The filter 440 can be used to filter the stray light of the ambient light passing through the optical lens 410, and transmit the filtered ambient light to the photosensitive chip 430, thereby ensuring that the image captured by the electronic device has better clarity. The filter 440 can be, but is not limited to, a blue glass filter. For example, the filter 440 can also be a reflective infrared filter, or a double-pass filter (a double-pass filter can allow visible light and infrared light in the ambient light to pass through at the same time, or allow visible light and other specific wavelengths of light (such as ultraviolet light) in the ambient light to pass through at the same time, or allow infrared light and other specific wavelengths of light (such as ultraviolet light) to pass through at the same time).

[0087] In order to fix the position of the filter 440, the camera module 400 may further include a support 450 disposed between the optical lens 410 and the module circuit board 420, and the two sides of the support 450 are respectively fixedly connected to the optical lens 410 and the module circuit board 420, and the specific fixing method may be bonding. The filter 440 may be disposed on one side of the support 450. A through hole 451 is provided on the support 450 in the area corresponding to the photosensitive chip 430, so that the ambient light can smoothly enter the photosensitive chip 430.

[0088] In the camera module 400, the optical lens 410 is the most critical component that affects the imaging quality of the camera module 400. The target surface, depth of field, resolution and other performance parameters of the camera module 400 are all determined by the optical lens 410. Among them, the target surface can be understood as the imaging area on the photosensitive chip 430. The larger the target surface, the more conducive to the improvement of imaging brightness and resolution. The depth of field refers to the distance range before and after the front of the optical lens 410 can obtain a clear image. It can also be understood as the distance range of the clear image presented by the range before and after the focus of the optical lens 410. The depth of field of the optical lens 410 is related to its aperture. The larger the aperture, the shallower the depth of field, which is more conducive to highlighting the subject in the shooting picture; the smaller the aperture, the deeper the depth of field, which is conducive to ensuring that the distant view and the close view in the shooting picture can be clearly imaged at the same time. For the camera module 400 with a large aperture and a large target surface, the total length of the optical lens 410 becomes the main factor affecting its imaging quality, and the current optical lens 410 often finds it difficult to take into account both the target surface and the total length design requirements.

[0089] The total length of the optical lens 410 affects the overall height of the camera module 400, and the overall height of the camera module 400 is an important reference indicator for the thickness design of the electronic device 1. In order to reduce the overall height of the camera module 400, some electronic devices 1 are currently beginning to adopt a pop-up camera module design. With this design, the camera module 400 has two states: being located inside the electronic device 1 and being popped out from the light inlet 121 to the outside of the electronic device 1. For ease of description, the state in which the camera module 400 is located inside the electronic device 1 is referred to as the first state. In this state, the camera module 400 usually does not perform shooting operations, so the first state can also be understood as the non-working state of the camera module 400. Correspondingly, the state in which the camera module 400 is popped out to the outside of the electronic device 1 is referred to as the second state. In this state, the camera module 400 can perform shooting operations, so the second state can also be understood as the working state of the camera module 400. The camera module 400 can be switched between a first state and a second state under the drive of a motor. When the camera module 400 is in the first state, the height of the camera module 400 is relatively small. Therefore, when it is completely set inside the electronic device 1, it will not restrict the thin design of the electronic device 1; when the camera module 400 is in the second state, the height of the camera module 400 increases. At this time, the position of part or all of the lenses in the optical lens 410 can be adjusted along the height direction of the camera module 400 (i.e., the z direction) to focus or zoom, so as to achieve a better photo effect.

[0090] The embodiment of the present application is an optical lens 410 designed based on a pop-up camera module 400. The optical lens 410 has a relatively small total length when the camera module 400 is in a first state, and has a relatively long back focus when the camera module 400 is in a second state, so it is convenient for focusing or zooming the camera module 400. In addition, the optical lens adopts a variable aperture structure, and combines the matching design of relevant parameters of the lens, so that the optical lens can provide different depth of field ranges for different scenes, thereby taking into account the shooting needs of multiple scenes.

[0091] refer to Figure 4 As shown, Figure 4 A reference structural diagram of an optical lens provided in an embodiment of the present application. The optical lens 410 may include a plurality of lenses having optical power. Exemplarily, the number of lenses may be at least seven, such as seven, eight, nine or more, which is not specifically limited in the present application. Figure 4The embodiment shown in is described by taking the optical lens 410 including seven lenses as an example. At this time, along the object side to the image side, the seven lenses of the optical lens 410 can be respectively the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7. In specific implementation, these lenses can be aspherical lenses, which can eliminate aberrations and help improve the imaging quality of the optical lens 410. At this time, each lens can be made of plastic material to reduce the difficulty and cost of the manufacturing process of the optical lens 410. Of course, in some other embodiments, each lens can also be made of glass material; or some lenses are made of glass material, and some lenses are made of plastic material. The specific selection can be made according to the actual application, and this application does not limit this.

[0092] In some embodiments, the optical lens 410 may further include a variable aperture ST, which may be disposed on the object side of the multi-lens, and whose light-passing diameter may be adjusted. It is understandable that the amount of light entering the optical lens 410 may be adjusted by adjusting the light-passing diameter of the variable aperture ST, and the aperture number F of the optical lens 410 may be adjusted, thereby adjusting the depth of field of the optical lens 410. In specific implementation, the variable aperture ST may adopt a "cat's eye" aperture, an "iris" aperture, an instantaneous aperture, a combined shutter aperture, etc., and this application does not limit this.

[0093] Among the lenses of the optical lens 410, the first lens arranged from the object side to the image side, i.e. Figure 4 The first lens L1 in the embodiment may have positive focal power, the object side surface of the first lens L1 is convex near the optical axis, the image side surface is concave near the optical axis, and the focal length f1 of the first lens L1 and the focal length EFL of the optical lens 410 satisfy: f1 / EFL≤1.3, and the optical lens 410 is helped to achieve better imaging quality by reasonably allocating the focal power. In addition, the Abbe coefficient vd1 of the first lens L1 may satisfy: vd1≥60.

[0094] The second lens arranged from the object side to the image side, that is, Figure 4 The second lens L2 in the optical lens 410 may have a relatively high refractive index. This design is conducive to correcting the aberration of the optical lens and also helps to reduce the total length of the optical lens 410. Exemplarily, the refractive index n2 of the second lens L2 satisfies: 1.6≤n2≤2.1. The Abbe coefficient vd2 of the second lens L2 and the Abbe coefficient vd1 of the first lens L1 satisfy: |vd1-vd2|≥40. By reasonably allocating the distribution of system materials, the chromatic aberration of the optical lens can be reduced and the image quality of the optical lens can be improved.

[0095] The intersection of the image side surface of the first lens L1 and the optical axis of the optical lens 410 is defined as O1. 1, the projection point of the edge of the image side surface of the first lens L1 on the optical axis is O1 2 , O1 1 With O1 2 The distance between them is sag1; the intersection point of the object side surface of the second lens L2 and the optical axis is defined as O2 1 , the projection point of the edge of the object side surface of the second lens L2 on the optical axis is O2 2 , O2 1 With O2 2 The distance between them is sag2. Along the extension direction of the optical axis, the distance between the image side surface of the first lens L1 and the object side surface of the second lens L2 is T12. When sag1, sag2 and T12 satisfy: T12-sag1+sag2≥0.35mm, a structural space can be provided for optical lens coupling to improve the imaging quality of the optical lens. It should be noted that the edge of the image side surface of the first lens L1 can also be understood as the position where the image side surface of the first lens L1 has the maximum optical effective aperture. Similarly, the edge of the object side surface of the second lens L2 can also be understood as the position where the object side surface of the second lens L2 has the maximum optical effective aperture.

[0096] In addition, the center thickness CT2 of the second lens L2 and its edge thickness ET2 can satisfy: 0.8≤CT2 / ET2≤1.1. The center thickness of the lens can be understood as the thickness at the center of the lens, that is, the thickness at the position where the optical axis passes through the lens, and the edge thickness can be understood as the thickness at the edge of the lens. With this design, the processability of the second lens L2 can be guaranteed and the yield rate of the optical lens can be improved.

[0097] The penultimate lens arranged from the object side to the image side, that is, Figure 4 The object side surface of the sixth lens L6 is convex near the optical axis, and the image side surface is concave near the optical axis, and at least one of the object side surface and the image side surface of the sixth lens L6 can be an anti-curved surface, which helps to improve the edge field image quality of the camera module. Among them, the anti-curved surface can be understood as a composite curved surface formed by curved surfaces with opposite convex directions. Taking the object side surface of the sixth lens L6 as an example, the central area of ​​the sixth lens L6 is convex toward the object side, and the edge area of ​​the sixth lens L6 is convex toward the image side.

[0098] The last lens arranged from the object side to the image side, that is, Figure 4 The seventh lens L7 has negative optical power. There may also be at least one reverse curved surface on the object side surface and the image side surface of the seventh lens L7 to further improve the edge field image quality of the camera module.

[0099] Along the direction from the object side to the image side, the point farthest from the imaging plane among the projection points of the object side surface of the first lens (first lens L1) on the optical axis is defined as O1, and the point closest to the imaging plane among the projection points of the image side surface of the last lens (seventh lens L7) on the optical axis is defined as Ox(O7). The distance TTL1 between O1 and O7 and the image height IH that can be formed by the optical lens 410 on its imaging plane satisfy: TTL1 / IH≤0.57.

[0100] The back focal length BFL of the optical lens 410 satisfies: BFL≤2.5mm. It should be noted that the back focal length BFL here is the distance between the seventh lens L7 and the photosensitive chip 430 when the camera module is popped up. In addition, the back focal length BFL of the optical lens 410 and the total length TTL of the optical lens 410 can satisfy: 5≤TTL / BFL≤8.

[0101] The entrance pupil diameter EPD of the optical lens 410 and the half-image height ImgH that the optical lens 410 can form on its imaging surface satisfy: 0.5≤EPD / ImgH≤0.8. Under this condition, the optical lens 410 can achieve a large aperture design, thereby increasing the amount of light entering the optical lens 410, which helps the camera module to achieve core functions such as night scene shooting, snapshots, videos, and background blur.

[0102] The maximum entrance pupil diameter EPDmax, the minimum entrance pupil diameter EPDmin of the optical lens 410 and the focal length EFL of the optical lens 410 satisfy: 1.6≤EFL / (EPDmax-EPDmin)≤3.

[0103] The focal length EFL of the optical lens 410 and the maximum half field of view HFOV of the optical lens 410 satisfy: EFL×tan(HFOV)≥7mm. With this design, the camera module can have a larger target surface, which is beneficial to improving the imaging brightness and resolution.

[0104] The total length TTL of the optical lens 410, the image height IH that the optical lens 410 can form on its imaging surface, and the aperture number F# of the optical lens 410 satisfy the following conditions: IH 2 / (TTL 2 ×F#)≥1.2.

[0105] The aperture number F# of the optical lens 410 and the image height IH that can be formed by the optical lens 410 on its imaging surface satisfy: IH / (4×F#)≥1.85.

[0106] In addition, it is worth mentioning that the optical lens 410 of the embodiment of the present application can adjust the aperture number F# by changing the light passing diameter of the variable aperture ST. Different light passing diameters correspond to different aperture numbers F#, that is, to different depths of field, so that the optical lens 410 can be adapted to different shooting scenes. For example, when the light passing diameter of the variable aperture ST is large, the aperture number F# of the optical lens 410 is relatively small, and it has a large aperture characteristic, so that the depth of field can be shallower and the focus point can be clear, while other scenes that are not within the depth of field range will be blurred, so that the subject can be better highlighted and the picture can be simplified; in addition, the use of a large aperture also means that the light entering the optical lens 410 per unit time will increase. When the exposure of the picture remains unchanged, the shutter speed can be increased in the large aperture mode. When shooting handheld in an environment with insufficient light or darkness, the increase in shutter speed can reduce the impact of hand shaking on the clarity of the picture, which is conducive to the camera module taking better night scene pictures. When the light-passing diameter of the variable aperture ST is small, the aperture number F# of the optical lens 410 is relatively large, and it has a small aperture characteristic, so that a large depth of field can be obtained, so that the background or foreground other than the focused subject can also remain clear; in addition, the small aperture can reduce the amount of light entering the optical lens 410, which can slow down the shutter speed, which is conducive to making the moving objects leave motion traces on the screen, so the optical lens 410 can also shoot scenes such as flowing water, car tracks, star trails and light painting in the small aperture mode.

[0107] It can be seen from the above description that the optical lens 410 of the embodiment of the present application has a relatively long back focus when the camera module is popped up, which facilitates the focusing or zooming operation of the camera module and helps the camera module achieve a better shooting effect. At the same time, the optical lens 410 adopts a variable aperture structural design, which can provide different depth of field ranges for different scenes, so it can take into account the shooting needs of multiple scenes. In addition, the optical lens 410 is combined with a photosensitive chip 430 with a large target surface to achieve better optical quality, which is conducive to improving the imaging quality of the camera module.

[0108] The imaging effect of the optical lens 410 is described in detail below in conjunction with specific embodiments.

[0109] refer to Figure 5 As shown, Figure 5 A schematic diagram of the structure of the first optical lens provided in the embodiment of the present application. The optical lens 410 includes a variable aperture ST and seven lenses with optical power, the seven lenses are respectively a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7, and the variable aperture ST is located on the object side of the first lens L1. In addition, the filter 440 of the camera module is located on the image side of the seventh lens L7, and the photosensitive chip 430 is located on the image side of the filter 440.

[0110] In this embodiment, the distance between the point of the projection of the object side surface of the first lens L1 on the optical axis that is farthest from the imaging plane and the point of the projection of the image side surface of the seventh lens L7 on the optical axis that is closest to the imaging plane is TTL1, and the image height IH that can be formed by TTL1 and the optical lens 410 on its imaging plane satisfies: TTL1 / IH=0.49;

[0111] The first lens L1 has positive refractive power, and the focal length f1 of the first lens L1 and the focal length EFL of the optical lens 410 satisfy: f1 / EFL=1.26;

[0112] The second lens L2 has positive refractive power, and the focal length f2 of the second lens L2 and the focal length EFL of the optical lens 410 satisfy: f2 / EFL=282; the refractive index n2 of the second lens L2 is 2.011;

[0113] The Abbe coefficient vd1 of the first lens L1 and the Abbe coefficient vd2 of the second lens L2 satisfy: vd1-vd2=75.8;

[0114] The third lens L3 has negative optical power;

[0115] The fourth lens L4 has positive refractive power;

[0116] The focal length f3 of the third lens L3, the focal length f4 of the fourth lens L4, and the focal length EFL of the optical lens 410 satisfy: EFL×(f3+f4) / (f3-f4)=-0.43095;

[0117] The fifth lens L5 has positive refractive power, and the focal length f5 of the fifth lens L5 and the focal length EFL of the optical lens 410 satisfy: f5 / EFL=7.57;

[0118] The sixth lens L6 has positive refractive power, and the focal length f6 of the sixth lens L6 and the focal length EFL of the optical lens 410 satisfy: f6 / EFL=1.3;

[0119] The seventh lens L7 has negative refractive power, and the focal length f7 of the seventh lens L7 and the focal length EFL of the optical lens 410 satisfy: f7 / EFL=-0.72.

[0120] For other design parameters of the optical lens 410 , please refer to Table 1.

[0121] Table 1

[0122] Focal Length EFL 8.27mm F-number 1.6 Half Field of View HFOV 44.72° Like high IH 16.84mm Total length of optical lens TTL 9.96mm Design wavelength 650nm,610nm,555nm,510nm,470nm

[0123] In the embodiment of the present application, each lens of the optical lens 410 can be an aspherical lens, that is, the optical lens 410 includes 14 aspherical surfaces. Please refer to Table 2 and Table 3, wherein Table 2 shows the radius of curvature, thickness, refractive index, and Abbe coefficient of each lens in the optical lens 410, and Table 3 shows the aspherical coefficient of each lens.

[0124] It should be noted that, in Table 2 and Table 3 and the appendix of the following embodiments, S1 and S2 respectively represent the object-side surface and the image-side surface of the first lens L1; S3 and S4 respectively represent the object-side surface and the image-side surface of the second lens L2; ​​S5 and S6 respectively represent the object-side surface and the image-side surface of the third lens L3; S7 and S8 respectively represent the object-side surface and the image-side surface of the fourth lens L4; S9 and S10 respectively represent the object-side surface and the image-side surface of the fifth lens L5; S11 and S12 respectively represent the object-side surface and the image-side surface of the sixth lens L6; S13 and S14 respectively represent the object-side surface and the image-side surface of the seventh lens L7; S15 and S16 respectively represent the object-side surface and the image-side surface of the filter 440.

[0125] T01 represents the distance between the variable aperture ST and the object-side surface of the first lens L1. When T01 is a negative value, it can be understood that along the extension direction of the optical axis, there is an overlapping area between the variable aperture ST and the first lens L1, that is, the object-side surface of the first lens L1 can partially extend into the light hole of the variable aperture ST. T12 represents the distance between the image-side surface of the first lens L1 and the object-side surface of the second lens L2; ​​T23 represents the distance between the image-side surface of the second lens L2 and the object-side surface of the third lens L3; T34 represents the distance between the image-side surface of the third lens L3 and the object-side surface of the fourth lens L4; T45 represents the distance between the image-side surface of the fourth lens L4 and the object-side surface of the fifth lens L5; T56 represents the distance between the image-side surface of the fifth lens L5 and the object-side surface of the sixth lens L6; T67 represents the distance between the image-side surface of the sixth lens L6 and the object-side surface of the seventh lens L7; T78 represents the distance between the image-side surface of the seventh lens L7 and the object-side surface of the filter 440; and T89 represents the distance between the image-side surface of the filter 440 and the imaging plane.

[0126] CT1, CT2, CT3, CT4, CT5, CT6, and CT7 respectively denote the center thicknesses of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7, and CT8 denotes the thickness of the filter 440.

[0127] n1, n2, n3, n4, n5, n6, and n7 respectively represent the refractive indices of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7, and n8 represents the refractive index of the filter 440.

[0128] vd1, vd2, vd3, vd4, vd5, vd6, and vd7 respectively represent the Abbe coefficients of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7, and vd8 represents the Abbe coefficient of the filter 440.

[0129] Table 2

[0130]

[0131] Table 3

[0132]

[0133]

[0134] Among the 14 aspherical surfaces of the optical lens 410 shown in Table 3, all even-order extended aspherical surface types z can be defined using but not limited to the following aspherical surface formula:

[0135]

[0136] Among them, z is the vector height of the aspherical surface, r is the radial coordinate of the aspherical surface, c is the vertex spherical curvature of the aspherical surface, K is the quadratic surface constant, and Ai represents the i-th order aspherical coefficient.

[0137] right Figure 5 The optical lens 410 shown is simulated, and the simulation results are described in detail below with reference to the accompanying drawings.

[0138] Figure 6 The axial chromatic aberration curve diagram of the first optical lens provided in the embodiment of the present application shows the simulation results of the focus depth position of the color light of 650nm, 610nm, 555nm, 510nm and 470nm wavelengths respectively. It can be seen that the axial chromatic aberration of the optical lens 410 can be controlled within a very small range;

[0139] Figure 7 The optical distortion curve diagram of the first optical lens provided in the embodiment of the present application reflects the deformation difference between the actual imaging shape and the ideal shape in different fields of view. It can be seen that the optical lens 410 can basically control the optical distortion within 3%.

[0140] refer to Figure 8 As shown, Figure 8A schematic diagram of the structure of the second optical lens provided in the embodiment of the present application. The optical lens 410 includes a variable aperture ST and seven lenses with optical power, the seven lenses are respectively a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7, and the variable aperture ST is located on the object side of the first lens L1. In addition, the filter 440 of the camera module is located on the image side of the seventh lens L7, and the photosensitive chip 430 is located on the image side of the filter 440.

[0141] In this embodiment, the distance between the point of the projection of the object side surface of the first lens L1 on the optical axis that is farthest from the imaging plane and the point of the projection of the image side surface of the seventh lens L7 on the optical axis that is closest to the imaging plane is TTL1, and the image height IH that can be formed by TTL1 and the optical lens 410 on its imaging plane satisfies: TTL1 / IH=0.505;

[0142] The first lens L1 has positive refractive power, and the focal length f1 of the first lens L1 and the focal length EFL of the optical lens 410 satisfy: f1 / EFL=1.125;

[0143] The second lens L2 has negative power, and the focal length f2 of the second lens L2 and the focal length EFL of the optical lens 410 satisfy: f2 / EFL=-13.9; the refractive index n2 of the second lens L2 is 1.677;

[0144] The Abbe coefficient vd1 of the first lens L1 and the Abbe coefficient vd2 of the second lens L2 satisfy: vd1-vd2=75.8;

[0145] The third lens L3 has negative optical power;

[0146] The fourth lens L4 has positive refractive power;

[0147] The focal length f3 of the third lens L3, the focal length f4 of the fourth lens L4, and the focal length EFL of the optical lens 410 satisfy: EFL×(f3+f4) / (f3-f4)=-0.74464;

[0148] The fifth lens L5 has positive refractive power, and the focal length f5 of the fifth lens L5 and the focal length EFL of the optical lens 410 satisfy: f5 / EFL=2.6972;

[0149] The sixth lens L6 has positive refractive power, and the focal length f6 of the sixth lens L6 and the focal length EFL of the optical lens 410 satisfy: f6 / EFL=2.847;

[0150] The seventh lens L7 has negative refractive power, and the focal length f7 of the seventh lens L7 and the focal length EFL of the optical lens 410 satisfy: f7 / EFL=-0.881.

[0151] For other design parameters of the optical lens 410 , please refer to Table 4.

[0152] Table 4

[0153] Focal Length EFL 8.468mm F-number 1.6 Half Field of View HFOV 43.95° Like high IH 16.8mm Total length of optical lens TTL 9.868mm Design wavelength 650nm,610nm,555nm,510nm,470nm

[0154] In the embodiment of the present application, each lens of the optical lens 410 can be an aspherical lens, that is, the optical lens 410 includes 14 aspherical surfaces. Please refer to Table 5 and Table 6, wherein Table 5 shows the radius of curvature, thickness, refractive index, and Abbe coefficient of each lens in the optical lens 410, and Table 6 shows the aspherical coefficient of each lens.

[0155] Table 5

[0156]

[0157] Table 6

[0158]

[0159]

[0160] Among the 14 aspheric surfaces of the optical lens 410 shown in Table 6, all even-order extended aspheric surface types z can be defined using but not limited to the following aspheric surface formula:

[0161]

[0162] Among them, z is the vector height of the aspherical surface, r is the radial coordinate of the aspherical surface, c is the vertex spherical curvature of the aspherical surface, K is the quadratic surface constant, and Ai represents the i-th order aspherical coefficient.

[0163] right Figure 8 The optical lens 410 shown is simulated, and the simulation results are described in detail below with reference to the accompanying drawings.

[0164] Fig. 9 The axial chromatic aberration curve diagram of the second optical lens provided in the embodiment of the present application shows the simulation results of the focus depth position of the color light of 650nm, 610nm, 555nm, 510nm and 470nm wavelengths respectively. It can be seen that the axial chromatic aberration of the optical lens 410 can be controlled within a very small range;

[0165] Fig.10 The optical distortion curve diagram of the second optical lens provided in the embodiment of the present application reflects the deformation difference between the actual imaging shape and the ideal shape in different fields of view. It can be seen that the optical lens 410 can basically control the optical distortion within 3%.

[0166] refer to Fig.11 As shown, Fig.11A schematic diagram of the structure of the third optical lens provided in the embodiment of the present application. The optical lens 410 includes a variable aperture ST and seven lenses with optical power, the seven lenses are respectively a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7, and the variable aperture ST is located on the object side of the first lens L1. In addition, the filter 440 of the camera module is located on the image side of the seventh lens L7, and the photosensitive chip 430 is located on the image side of the filter 440.

[0167] In this embodiment, the distance between the point of the projection of the object side surface of the first lens L1 on the optical axis that is farthest from the imaging plane and the point of the projection of the image side surface of the seventh lens L7 on the optical axis that is closest to the imaging plane is TTL1, and the image height IH that can be formed by TTL1 and the optical lens 410 on its imaging plane satisfies: TTL1 / IH=0.506;

[0168] The first lens L1 has positive refractive power, and the focal length f1 of the first lens L1 and the focal length EFL of the optical lens 410 satisfy: f1 / EFL=1.036;

[0169] The second lens L2 has negative power, and the focal length f2 of the second lens L2 and the focal length EFL of the optical lens 410 satisfy: f2 / EFL=-5.24; the refractive index n2 of the second lens L2 is 1.677;

[0170] The Abbe coefficient vd1 of the first lens L1 and the Abbe coefficient vd2 of the second lens L2 satisfy: vd1-vd2=62.32;

[0171] The third lens L3 has negative optical power;

[0172] The fourth lens L4 has positive refractive power;

[0173] The focal length f3 of the third lens L3, the focal length f4 of the fourth lens L4, and the focal length EFL of the optical lens 410 satisfy: EFL×(f3+f4) / (f3-f4)=0.1578;

[0174] The fifth lens L5 has negative refractive power, and the focal length f5 of the fifth lens L5 and the focal length EFL of the optical lens 410 satisfy: f5 / EFL=-1.519;

[0175] The sixth lens L6 has positive refractive power, and the focal length f6 of the sixth lens L6 and the focal length EFL of the optical lens 410 satisfy: f6 / EFL=0.755;

[0176] The seventh lens L7 has negative refractive power, and the focal length f7 of the seventh lens L7 and the focal length EFL of the optical lens 410 satisfy: f7 / EFL=-1.016.

[0177] For other design parameters of the optical lens 410 , please refer to Table 7.

[0178] Table 7

[0179] Focal Length EFL 8.69mm F-number 1.6 Half Field of View HFOV 42.84° Like high IH 16.6mm Total length of optical lens TTL 10.184mm Design wavelength 650nm,610nm,555nm,510nm,470nm

[0180] In the embodiment of the present application, each lens of the optical lens 410 can be an aspherical lens, that is, the optical lens 410 includes 14 aspherical surfaces. Please refer to Table 8 and Table 9, wherein Table 8 shows the radius of curvature, thickness, refractive index, and Abbe coefficient of each lens in the optical lens 410, and Table 9 shows the aspherical coefficient of each lens.

[0181] Table 8

[0182]

[0183] Table 9

[0184]

[0185]

[0186] Among the 14 aspherical surfaces of the optical lens 410 shown in Table 9, all even-order extended aspherical surface types z can be defined using but not limited to the following aspherical surface formula:

[0187]

[0188] Among them, z is the vector height of the aspherical surface, r is the radial coordinate of the aspherical surface, c is the vertex spherical curvature of the aspherical surface, K is the quadratic surface constant, and Ai represents the i-th order aspherical coefficient.

[0189] right Fig.11 The optical lens 410 shown is simulated, and the simulation results are described in detail below with reference to the accompanying drawings.

[0190] Fig.12 The axial chromatic aberration curve diagram of the third optical lens provided in the embodiment of the present application shows the simulation results of the focus depth position of the color light of 650nm, 610nm, 555nm, 510nm and 470nm wavelengths respectively. It can be seen that the axial chromatic aberration of the optical lens 410 can be controlled within a very small range;

[0191] Fig.13 The optical distortion curve diagram of the third optical lens provided in the embodiment of the present application reflects the deformation difference between the actual imaging shape and the ideal shape in different fields of view. It can be seen that the optical lens 410 can basically control the optical distortion within 3%.

[0192] refer to Fig.14 As shown, Fig.14A schematic diagram of the structure of the fourth optical lens provided in the embodiment of the present application. The optical lens includes a variable aperture ST and seven lenses with optical power, the seven lenses are respectively a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7, and the variable aperture ST is located on the object side of the first lens L1. In addition, the filter 440 of the camera module is located on the image side of the seventh lens L7, and the photosensitive chip 430 is located on the image side of the filter 440.

[0193] In this embodiment, the distance between the point of the projection of the object side surface of the first lens L1 on the optical axis that is farthest from the imaging plane and the point of the projection of the image side surface of the seventh lens L7 on the optical axis that is closest to the imaging plane is TTL1, and the image height IH that can be formed by TTL1 and the optical lens 410 on its imaging plane satisfies: TTL1 / IH=0.51;

[0194] The first lens L1 has positive refractive power, and the focal length f1 of the first lens L1 and the focal length EFL of the optical lens 410 satisfy: f1 / EFL=1.19;

[0195] The second lens L2 has negative power, and the focal length f2 of the second lens L2 and the focal length EFL of the optical lens 410 satisfy: f2 / EFL=-10.38; the refractive index n2 of the second lens L2 is 1.677;

[0196] The Abbe coefficient vd1 of the first lens L1 and the Abbe coefficient vd2 of the second lens L2 satisfy: vd1-vd2=58.76;

[0197] The third lens L3 has negative optical power;

[0198] The fourth lens L4 has positive refractive power;

[0199] The focal length f3 of the third lens L3, the focal length f4 of the fourth lens L4, and the focal length EFL of the optical lens 410 satisfy: EFL×(f3+f4) / (f3-f4)=-0.436;

[0200] The fifth lens L5 has negative refractive power, and the focal length f5 of the fifth lens L5 and the focal length EFL of the optical lens 410 satisfy: f5 / EFL=-1.749;

[0201] The sixth lens L6 has positive refractive power, and the focal length f6 of the sixth lens L6 and the focal length EFL of the optical lens 410 satisfy: f6 / EFL=0.6535;

[0202] The seventh lens L7 has negative refractive power, and the focal length f7 of the seventh lens L7 and the focal length EFL of the optical lens 410 satisfy: f7 / EFL=-0.796.

[0203] For other design parameters of the optical lens 410 , please refer to Table 10.

[0204] Table 10

[0205] Focal Length EFL 8.287mm F-number 1.5 Half Field of View HFOV 44.88° Like high IH 16.38mm Total length of optical lens TTL 10.04mm Design wavelength 650nm,610nm,555nm,510nm,470nm

[0206] In the embodiment of the present application, each lens of the optical lens 410 can be an aspherical lens, that is, the optical lens 410 includes 14 aspherical surfaces. Please refer to Table 11 and Table 12, wherein Table 11 shows the radius of curvature, thickness, refractive index, and Abbe coefficient of each lens in the optical lens 410, and Table 12 shows the aspherical coefficient of each lens.

[0207] Table 11

[0208]

[0209] Table 12

[0210]

[0211]

[0212] Among the 14 aspheric surfaces of the optical lens 410 shown in Table 12, all even-order extended aspheric surface types z can be defined using but not limited to the following aspheric surface formula:

[0213]

[0214] Among them, z is the vector height of the aspherical surface, r is the radial coordinate of the aspherical surface, c is the vertex spherical curvature of the aspherical surface, K is the quadratic surface constant, and Ai represents the i-th order aspherical coefficient.

[0215] right Fig.14 The optical lens 410 shown is simulated, and the simulation results are described in detail below with reference to the accompanying drawings.

[0216] Fig.15 The axial chromatic aberration curve of the fourth optical lens provided in the embodiment of the present application shows the simulation results of the focus depth position of the color light of 650nm, 610nm, 555nm, 510nm and 470nm wavelengths respectively. It can be seen that the axial chromatic aberration of the optical lens 410 can be controlled within a very small range;

[0217] Fig.16 The optical distortion curve diagram of the fourth optical lens provided in the embodiment of the present application reflects the deformation difference between the actual imaging shape and the ideal shape in different fields of view. It can be seen that the optical lens 410 can basically control the optical distortion within 3%.

[0218] refer to Fig.17 As shown, Fig.17A schematic diagram of the structure of the fifth optical lens provided in the embodiment of the present application. The optical lens 410 includes a variable aperture ST and seven lenses with optical power, the seven lenses are respectively a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7, and the variable aperture ST is located on the object side of the first lens L1. In addition, the filter 440 of the camera module is located on the image side of the seventh lens L7, and the photosensitive chip 430 is located on the image side of the filter 440.

[0219] In this embodiment, the distance between the point of the projection of the object side surface of the first lens L1 on the optical axis that is farthest from the imaging plane and the point of the projection of the image side surface of the seventh lens L7 on the optical axis that is closest to the imaging plane is TTL1, and the image height IH that can be formed by TTL1 and the optical lens 410 on its imaging plane satisfies: TTL1 / IH=0.49;

[0220] The first lens L1 has positive refractive power, and the focal length f1 of the first lens L1 and the focal length EFL of the optical lens 410 satisfy: f1 / EFL=1.138;

[0221] The second lens L2 has negative power, and the focal length f2 of the second lens L2 and the focal length EFL of the optical lens 410 satisfy: f2 / EFL=-9.22; the refractive index n2 of the second lens L2 is 1.677;

[0222] The Abbe coefficient vd1 of the first lens L1 and the Abbe coefficient vd2 of the second lens L2 satisfy: vd1-vd2=75.85;

[0223] The third lens L3 has negative optical power;

[0224] The fourth lens L4 has positive refractive power;

[0225] The focal length f3 of the third lens L3, the focal length f4 of the fourth lens L4, and the focal length EFL of the optical lens 410 satisfy: EFL×(f3+f4) / (f3-f4)=1.006;

[0226] The fifth lens L5 has positive refractive power, and the focal length f5 of the fifth lens L5 and the focal length EFL of the optical lens 410 satisfy: f5 / EFL=23.05;

[0227] The sixth lens L6 has positive refractive power, and the focal length f6 of the sixth lens L6 and the focal length EFL of the optical lens 410 satisfy: f6 / EFL=1.077;

[0228] The seventh lens L7 has negative refractive power, and the focal length f7 of the seventh lens L7 and the focal length EFL of the optical lens 410 satisfy: f7 / EFL=-0.602.

[0229] For other design parameters of the optical lens 410, please refer to Table 13.

[0230] Table 13

[0231] Focal Length EFL 8.503mm F-number 1.6 Half Field of View HFOV 44.24° Like high IH 16.834mm Total length of optical lens TTL 9.855mm Design wavelength 650nm,610nm,555nm,510nm,470nm

[0232] In the embodiment of the present application, each lens of the optical lens 410 can be an aspherical lens, that is, the optical lens 410 includes 14 aspherical surfaces. Please refer to Table 14 and Table 15, wherein Table 14 shows the radius of curvature, thickness, refractive index, and Abbe coefficient of each lens in the optical lens 410, and Table 15 shows the aspherical coefficient of each lens.

[0233] Table 14

[0234]

[0235] Table 15

[0236]

[0237]

[0238] Among the 14 aspherical surfaces of the optical lens 410 shown in Table 15, all even-order extended aspherical surface types z can be defined using but not limited to the following aspherical surface formula:

[0239]

[0240] Among them, z is the vector height of the aspherical surface, r is the radial coordinate of the aspherical surface, c is the vertex spherical curvature of the aspherical surface, K is the quadratic surface constant, and Ai represents the i-th order aspherical coefficient.

[0241] right Fig.17 The optical lens 410 shown is simulated, and the simulation results are described in detail below with reference to the accompanying drawings.

[0242] Fig.18 The axial chromatic aberration curve diagram of the fifth optical lens provided in the embodiment of the present application shows the simulation results of the focus depth position of the color light of 650nm, 610nm, 555nm, 510nm and 470nm wavelengths respectively. It can be seen that the axial chromatic aberration of the optical lens 410 can be controlled within a very small range;

[0243] Fig.19 The optical distortion curve diagram of the fifth optical lens provided in the embodiment of the present application reflects the deformation difference between the actual imaging shape and the ideal shape in different fields of view. It can be seen that the optical lens 410 can basically control the optical distortion within 3%.

[0244] refer to Fig. 20 As shown, Fig. 20A schematic diagram of the structure of the fourth optical lens provided in the embodiment of the present application. The optical lens 410 includes a variable aperture ST and seven lenses with optical power, the seven lenses are respectively a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7, and the variable aperture ST is located on the object side of the first lens L1. In addition, the filter 440 of the camera module is located on the image side of the seventh lens L7, and the photosensitive chip 430 is located on the image side of the filter 440.

[0245] In this embodiment, the distance between the point of the projection of the object side surface of the first lens L1 on the optical axis that is farthest from the imaging plane and the point of the projection of the image side surface of the seventh lens L7 on the optical axis that is closest to the imaging plane is TTL1, and the image height IH that can be formed by TTL1 and the optical lens 410 on its imaging plane satisfies: TTL1 / IH=0.49;

[0246] The first lens L1 has positive refractive power, and the focal length f1 of the first lens L1 and the focal length EFL of the optical lens 410 satisfy: f1 / EFL=1.14;

[0247] The second lens L2 has negative power, and the focal length f2 of the second lens L2 and the focal length EFL of the optical lens 410 satisfy: f2 / EFL=-10.1; the refractive index n2 of the second lens L2 is 1.677;

[0248] The Abbe coefficient vd1 of the first lens L1 and the Abbe coefficient vd2 of the second lens L2 satisfy: vd1-vd2=75.85;

[0249] The third lens L3 has negative optical power;

[0250] The fourth lens L4 has positive refractive power;

[0251] The focal length f3 of the third lens L3, the focal length f4 of the fourth lens L4, and the focal length EFL of the optical lens 410 satisfy: EFL×(f3+f4) / (f3-f4)=1.22;

[0252] The fifth lens L5 has negative refractive power, and the focal length f5 of the fifth lens L5 and the focal length EFL of the optical lens 410 satisfy: f5 / EFL=-2.46;

[0253] The sixth lens L6 has positive refractive power, and the focal length f6 of the sixth lens L6 and the focal length EFL of the optical lens 410 satisfy: f6 / EFL=0.845;

[0254] The seventh lens L7 has negative refractive power, and the focal length f7 of the seventh lens L7 and the focal length EFL of the optical lens 410 satisfy: f7 / EFL=-0.694.

[0255] For other design parameters of the optical lens 410, please refer to Table 16.

[0256] Table 16

[0257] Focal Length EFL 8.355mm F-number 1.6 Half Field of View HFOV 44.5° Like high IH 16.8mm Total length of optical lens TTL 9.7mm Design wavelength 650nm,610nm,555nm,510nm,470nm

[0258] In the embodiment of the present application, each lens of the optical lens 410 can be an aspherical lens, that is, the optical lens 410 includes 14 aspherical surfaces. Please refer to Table 17 and Table 18, wherein Table 17 shows the radius of curvature, thickness, refractive index, and Abbe coefficient of each lens in the optical lens 410, and Table 18 shows the aspherical coefficient of each lens.

[0259] Table 17

[0260]

[0261] Table 18

[0262]

[0263]

[0264] Among the 14 aspheric surfaces of the optical lens 410 shown in Table 18, all even-order extended aspheric surface types z can be defined using but not limited to the following aspheric surface formula:

[0265]

[0266] Among them, z is the vector height of the aspherical surface, r is the radial coordinate of the aspherical surface, c is the vertex spherical curvature of the aspherical surface, K is the quadratic surface constant, and Ai represents the i-th order aspherical coefficient.

[0267] right Fig. 20 The optical lens shown is simulated, and the simulation results are described in detail below in conjunction with the accompanying drawings.

[0268] Fig.21 The axial chromatic aberration curve of the sixth optical lens provided in the embodiment of the present application shows the simulation results of the focus depth position of the color light of 650nm, 610nm, 555nm, 510nm and 470nm wavelengths respectively. It can be seen that the axial chromatic aberration of the optical lens 410 can be controlled within a very small range;

[0269] Fig. 22 The optical distortion curve diagram of the sixth optical lens provided in the embodiment of the present application reflects the deformation difference between the actual imaging shape and the ideal shape in different fields of view. It can be seen that the optical lens 410 can basically control the optical distortion within 3%.

[0270] It can be seen from the structures and simulation effects of the above-mentioned first optical lens, second optical lens, third optical lens, fourth optical lens, fifth optical lens and sixth optical lens that the optical lens provided in the embodiments of the present application can obtain better imaging effects.

[0271] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An optical lens, characterized in that: The optical lens is used in a pop-up camera module, and includes seven lenses with optical power arranged from the object side to the image side. The number of lenses with optical power in the optical lens is seven, wherein: Along the direction from the object side to the image side, among the seven lenses, the first lens has positive focal power, the object side surface of the first lens is convex near the optical axis, and the image side surface is concave near the optical axis; the third lens has negative focal power, the fourth lens has positive focal power, the sixth lens has positive focal power, and the last lens has negative focal power; The back focal length BFL of the optical lens satisfies: 1.627640mm≤BFL≤2.5mm, and the back focal length BFL is the back focal length of the optical lens when the camera module is in the pop-up state; along the direction from the object side to the image side, the point on the object side surface of the first lens farthest from the imaging surface of the optical lens in the projection point of the optical axis of the optical lens is O1, and the point on the image side surface of the last lens closest to the imaging surface in the projection point of the optical axis is Ox, the distance between O1 and Ox is TTL1, and TTL1 and the image height IH of the optical lens satisfy: TTL1 / IH≤0.57, where x is the number of the lenses; The optical lens also includes a variable aperture, which is located on the object side of the first lens arranged in the direction from the object side to the image side; the maximum entrance pupil diameter EPDmax, the minimum entrance pupil diameter EPDmin of the optical lens and the focal length EFL of the optical lens satisfy: 1.6≤EFL / (EPDmax-EPDmin)≤3.

2. The optical lens according to claim 1, wherein: Along the direction from the object side to the image side, the focal length f1 of the first lens and the focal length EFL of the optical lens satisfy: f1 / EFL≤1.

3.

3. The optical lens according to claim 1, wherein: The focal length EFL of the optical lens and the maximum half field of view HFOV of the optical lens satisfy: EFL×tan(HFOV)≥7mm.

4. The optical lens according to claim 1, wherein: The total length TTL of the optical lens, the image height IH of the optical lens and the aperture number F# of the optical lens satisfy: IH 2 / (TTL 2 ×F#)≥1.

2.

5. The optical lens according to claim 1, wherein: The aperture number F# of the optical lens and the image height IH of the optical lens satisfy: IH / (4×F#)≥1.

85.

6. The optical lens according to claim 1, wherein: Along the direction from the object side to the image side, the refractive index n2 of the second lens element satisfies: 1.6≤n2≤2.

1.

7. The optical lens according to claim 1, wherein: Along the direction from the object side to the image side, the Abbe coefficient vd1 of the first lens and the Abbe coefficient vd2 of the second lens satisfy: |vd1-vd2|≥40.

8. The optical lens according to claim 1, wherein: Along the direction from the object side to the image side, at least one of the object side surface and the image side surface of the penultimate lens is a reverse curved surface; and / or, Along the direction from the object side to the image side, at least one of the object side surface and the image side surface of the last lens is a reverse curved surface.

9. The optical lens according to claim 1, wherein: The total length TTL of the optical lens and the back focal length BFL of the optical lens satisfy: 5≤TTL / BFL≤8.

10. The optical lens according to claim 1, wherein: Along the direction from the object side to the image side, the intersection point of the image side surface of the first lens and the optical axis is O11, the projection point of the edge of the image side surface of the first lens on the optical axis is O12, and the distance between O11 and O12 is sag1; the intersection point of the object side surface of the second lens and the optical axis is O21, the projection point of the edge of the object side surface of the second lens on the optical axis is O22, and the distance between O21 and O22 is sag2; along the optical axis direction, the distance between the image side surface of the first lens and the object side surface of the second lens is T12; sag1, sag2 and T12 satisfy: T12-sag1+sag2≥0.35mm.

11. The optical lens according to claim 1, wherein: An entrance pupil diameter EPD of the optical lens and a half image height ImgH of the optical lens satisfy: 0.5≤EPD / ImgH≤0.

8.

12. The optical lens according to claim 1, wherein: Along the direction from the object side to the image side, the center thickness CT2 and the edge thickness ET2 of the second lens satisfy: 0.8≤CT2 / ET2≤1.

1.

13. A camera module, characterized in that: It comprises a photosensitive chip and the optical lens according to any one of claims 1 to 12, wherein the photosensitive chip is arranged on the imaging surface of the optical lens, and the photosensitive chip is used to convert the light signal transmitted by the optical lens into an image signal.

14. An electronic device, characterized in that: It includes a shell and a camera module as described in claim 13, wherein the camera module is arranged in the shell, and the camera module has a first state located inside the shell, and a second state at least partially popped out to the outside of the shell.

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