An optical lens, a camera module and an electronic device

Abstract

The application provides an optical lens, a camera module and an electronic device, so as to provide different depth of field ranges for different shooting scenes and meet the shooting requirements of multiple scenes. The optical lens comprises a variable aperture, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged from an object side to an image side. The first lens has positive refractive power, the object side surface of the first lens is convex near an optical axis, and the image side surface of the first lens is concave near the optical axis. The second lens has negative refractive power, the object side surface of the second lens is convex near the optical axis, and the image side surface of the second lens is concave near the optical axis. The object side surface of the third lens is concave near the optical axis. The object side surface of the seventh lens is a reverse curve. The focal length f1 of the first lens and the focal length EFL of the optical lens satisfy 0≤f1 / EFL≤1.1. The focal length f3 of the third lens and the focal length f4 of the fourth lens satisfy -4≤f3 / f4≤-1.3.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and in particular to an optical lens, a camera module, and an electronic device. Background Technology

[0002] To enhance the competitiveness of mobile phones, integrating high-performance optical lenses has become a crucial development trend. The zoom range, resolution, and image quality of mobile phone lenses all require further improvement. Furthermore, the depth of field of an optical lens is also a significant factor affecting its shooting effect. For example, in some shooting scenarios, a small-aperture lens is needed to ensure both foreground and background are sharp; conversely, a large-aperture lens is required to emphasize the subject and blur the background. However, most mobile phone lenses currently on the market use a fixed aperture design, which cannot meet the needs of various shooting scenarios. Summary of the Invention

[0003] This application provides an optical lens, a camera module, and an electronic device, which enable the optical lens to provide different depth-of-field ranges for different shooting scenarios, taking into account the shooting needs of multiple scenarios.

[0004] In a first aspect, this application provides an optical lens, which may include a variable aperture and seven lenses arranged from the object side to the image side. The seven lenses are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The variable aperture is located on the object side of the first lens, and its aperture diameter is adjustable, thereby allowing adjustment of the aperture number of the optical lens. The first lens has positive optical power, with a convex surface near the optical axis on its object-side surface and a concave surface near the optical axis on its image-side surface. The focal length f1 of the first lens and the focal length EFL of the optical lens satisfy the condition: 0 ≤ f1 / EFL ≤ 1.1. The second lens has negative optical power, with a convex surface near the optical axis on its object-side surface and a concave surface near the optical axis on its image-side surface. The object-side surface of the third lens is concave near the optical axis, and the focal length f3 of the third lens and the focal length f4 of the fourth lens satisfy the condition: -4 ≤ f3 / f4 ≤ -1.3. The object-side surface of the seventh lens is a curved surface, which helps to improve the edge field of view image quality of the optical lens.

[0005] In the above solution, the optical lens provided in this application adopts a variable aperture structure, combined with the matching design of the relevant parameters of the lens, so that the optical lens can provide different depth of field ranges for different scenes, thus taking into account the shooting needs of multiple scenes.

[0006] In some possible implementations, the radius of curvature R3 of the object-side surface of the second lens near the optical axis and the radius of curvature R4 of the image-side surface near the optical axis satisfy: 1.8≤(R3+R4) / (R3-R4)≤6.3. This setting helps to balance the optical power matching of the optical lens and shorten the total length TTL of the optical lens.

[0007] In some possible implementations, the total length TTL of the optical lens, the aperture number Fno. of the optical lens, and the half-image height ImgH that can be formed on the imaging plane of the optical lens satisfy: TTL×Fno. / ImgH≥1.9.

[0008] In some possible implementations, the center thickness CT5 of the fifth lens, the center thickness CT7 of the seventh lens, and the half field of view HFOV of the optical lens satisfy: 0≤CT7 / (CT5×tan(HFOV))≤1.1.

[0009] In some possible implementations, the aperture number Fno. of the optical lens satisfies: 1.2 ≤ Fno. ≤ 8.0. The aperture number Fno. of the optical lens can be adjusted by changing the light-transmitting diameter of the variable aperture. Different light-transmitting diameters correspond to different aperture numbers Fno., which in turn correspond to different depths of field, thus allowing the optical lens to adapt to different shooting scenarios.

[0010] In some possible implementations, the radius of curvature R12 of the image-side surface of the sixth lens near the optical axis satisfies the following condition with the focal length EFL of the optical lens: 0≤|EFL / R12|≤0.46, which is beneficial for the sixth lens to form a better match with other lenses.

[0011] In some possible implementations, the radius of curvature R13 of the object-side surface of the seventh lens satisfies the following condition with respect to the focal length EFL of the optical lens: 0 ≤ |EFL / R13| ≤ 0.9. This design is beneficial for the seventh lens to correct edge field aberrations and to shorten the total length (TTL) of the optical lens.

[0012] In some possible implementations, the total length (TTL) of the optical lens and the entrance pupil diameter (EPD) of the optical lens satisfy the following condition: 1.5 ≤ TTL / EPD ≤ 10. This can better control the amount of light entering the optical lens and maintain the total length (TTL) of the optical lens.

[0013] In some possible implementations, the distance d1 between the first lens and the second lens along the optical axis of the optical lens satisfies: d1 / dm≤1, where dm is the distance between the m-th lens and the (m+1)-th lens, m is a natural number and 2≤m≤6. This spacing arrangement can improve the overall mechanical strength of the optical lens.

[0014] In some possible implementations, the center thickness CT1 of the first lens satisfies: CT1 / CTn≥1, where CTn is the center thickness of the nth lens, n is a natural number and 2≤n≤7. Using this thickness combination, combined with the optical lens's power combination, can enable the optical lens to achieve better image quality.

[0015] In some possible implementations, the optical lens may have the following specific structural forms:

[0016] The aperture number Fno. of the optical lens satisfies: 1.2 ≤ Fno. ≤ 4.0; the focal length of the first lens and the focal length EFL of the optical lens satisfy: f1 / EFL = 1; the focal length f3 of the third lens and the focal length f4 of the fourth lens satisfy: f3 / f4 = -1.4; the radius of curvature R3 of the object-side surface of the second lens near the optical axis and the radius of curvature R4 of its image-side surface near the optical axis satisfy: (R3+R4) / (R3-R4) = 5; the total length TTL of the optical lens, the half-image height ImgH that the optical lens can form on its imaging plane, and the aperture number Fno. of the optical lens satisfy: 1.9 ≤ TTL×F / ImgH ≤ 5.5; the center thickness CT5 of the fifth lens, the center thickness CT7 of the seventh lens, and the half-image height ImgH of the optical lens satisfy: 1.9 ≤ TTL×F / ImgH ≤ 5.5; The field of view (HFOV) satisfies: CT7 / [CT5×tan(HFOV)]=0.8; the radius of curvature R12 of the image-side surface of the sixth lens near the optical axis and the focal length EFL of the optical lens satisfy: |EFL / R12|=0.4; the radius of curvature R13 of the object-side surface of the seventh lens and the focal length EFL of the optical lens satisfy: |EFL / R13|=0.3; the total length TTL of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy: 1.84≤TTL / EPD≤4.8; along the optical axis of the optical lens, the distance d1 between the first and second lenses satisfies: 0.1≤d1 / dm≤0.5; the center thickness CT1 of the first lens satisfies: 1.4≤CT1 / CTn≤3.5; or,

[0017] The aperture number Fno. of the optical lens satisfies: 1.2 ≤ Fno. ≤ 4.0; the focal length of the first lens and the focal length EFL of the optical lens satisfy: f1 / EFL = 0.98; the focal length f3 of the third lens and the focal length f4 of the fourth lens satisfy: f3 / f4 = -1.64; the radius of curvature R3 of the object-side surface of the second lens near the optical axis and the radius of curvature R4 of its image-side surface near the optical axis satisfy: (R3+R4) / (R3-R4) = 3.68; the total length TTL of the optical lens, the half-image height ImgH that the optical lens can form on its imaging plane, and the aperture number Fno. of the optical lens satisfy: 2.0 ≤ TTL × Fno. / ImgH ≤ 5.6; the center thickness CT5 of the fifth lens, the center thickness CT7 of the seventh lens, and the focal length of the optical lens... The half field of view (HFOV) satisfies: CT7 / [CT5×tan(HFOV)]=0.42; the radius of curvature R12 of the image-side surface of the sixth lens near the optical axis and the focal length EFL of the optical lens satisfy: |EFL / R12|=0.32; the radius of curvature R13 of the object-side surface of the seventh lens and the focal length EFL of the optical lens satisfy: |EFL / R13|=0.37; the total length TTL of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy: 1.84≤TTL / EPD≤9.80; along the optical axis of the optical lens, the distance d1 between the first and second lenses satisfies: 0.04≤d1 / dm≤0.21; the center thickness CT1 of the first lens satisfies: 1.78≤CT1 / CTn≤5.00; or;

[0018] The aperture number Fno. of the optical lens satisfies: 1.2 ≤ Fno. ≤ 4.0; the focal length of the first lens and the focal length EFL of the optical lens satisfy: f1 / EFL = 1.1; the focal length f3 of the third lens and the focal length f4 of the fourth lens satisfy: f3 / f4 = -4; the radius of curvature R3 of the object-side surface of the second lens near the optical axis and the radius of curvature R4 of its image-side surface near the optical axis satisfy: (R3+R4) / (R3-R4) = 5.73; the total length TTL of the optical lens, the half-image height ImgH that the optical lens can form on its imaging plane, and the aperture number Fno. of the optical lens satisfy: 2.33 ≤ TTL×F / ImgH ≤ 6.24; the center thickness CT5 of the fifth lens, the center thickness CT7 of the seventh lens, and the half-image height ImgH of the optical lens satisfy: 2.33 ≤ TTL×F / ImgH ≤ 6.24; The field of view (HFOV) satisfies: CT7 / [CT5×tan(HFOV)]=1; the radius of curvature R12 of the image-side surface of the sixth lens near the optical axis and the focal length EFL of the optical lens satisfy: |EFL / R12|=0.39; the radius of curvature R13 of the object-side surface of the seventh lens and the focal length EFL of the optical lens satisfy: |EFL / R13|=2.19; the total length TTL of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy: 1.96≤TTL / EPD≤5.33; along the optical axis of the optical lens, the distance d1 between the first and second lenses satisfies: 0.07≤d1 / dm≤0.22; the center thickness CT1 of the first lens satisfies: 1.25≤CT1 / CTn≤5.00; or;

[0019] The aperture number Fno. of the optical lens satisfies: 1.2 ≤ Fno. ≤ 4.0; the focal length of the first lens and the focal length EFL of the optical lens satisfy: f1 / EFL = 1.09; the focal length f3 of the third lens and the focal length f4 of the fourth lens satisfy: f3 / f4 = -3.61; the radius of curvature R3 of the object-side surface of the second lens near the optical axis and the radius of curvature R4 of its image-side surface near the optical axis satisfy: (R3+R4) / (R3-R4) = 5.58; the total length TTL of the optical lens, the half-image height ImgH that the optical lens can form on its imaging plane, and the aperture number Fno. of the optical lens satisfy: 2.33 ≤ TTL × Fno. / ImgH ≤ 6.25; the center thickness CT5 of the fifth lens, the center thickness CT7 of the seventh lens, and the optical lens The half field of view (HFOV) satisfies: CT7 / [CT5×tan(HFOV)]=1.04; the radius of curvature R12 of the image-side surface of the sixth lens near the optical axis and the focal length EFL of the optical lens satisfy: |EFL / R12|=0.46; the radius of curvature R13 of the object-side surface of the seventh lens and the focal length EFL of the optical lens satisfy: |EFL / R13|=2.19; the total length TTL of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy: 1.96≤TTL / EPD≤5.22; along the optical axis of the optical lens, the distance d1 between the first lens and the second lens satisfies: 0.07≤d1 / dm≤0.21; the center thickness CT1 of the first lens satisfies: 1.39≤CT1 / CTn≤3.41; or;

[0020] The aperture number Fno. of the optical lens satisfies: 1.2 ≤ Fno. ≤ 4.0; the focal length of the first lens and the focal length EFL of the optical lens satisfy: f1 / EFL = 1.05; the focal length f3 of the third lens and the focal length f4 of the fourth lens satisfy: f3 / f4 = -1.55; the radius of curvature R3 of the object-side surface of the second lens near the optical axis and the radius of curvature R4 of its image-side surface near the optical axis satisfy: (R3+R4) / (R3-R4) = 5.54; the total length TTL of the optical lens, the half-image height ImgH that the optical lens can form on its imaging plane, and the aperture number Fno. of the optical lens satisfy: 2.07 ≤ TTL × Fno. / ImgH ≤ 5.62; the center thickness CT5 of the fifth lens, the center thickness CT7 of the seventh lens, and the optical lens The half field of view (HFOV) satisfies: CT7 / [CT5×tan(HFOV)]=0.75; the radius of curvature R12 of the image-side surface of the sixth lens near the optical axis and the focal length EFL of the optical lens satisfy: |EFL / R12|=0.02; the radius of curvature R13 of the object-side surface of the seventh lens and the focal length EFL of the optical lens satisfy: |EFL / R13|=0.26; the total length TTL of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy: 1.82≤TTL / EPD≤5.08; along the optical axis of the optical lens, the distance d1 between the first lens and the second lens satisfies: 0.11≤d1 / dm≤0.66; the center thickness CT1 of the first lens satisfies: 1.41≤CT1 / CTn≤3.48; or;

[0021] The aperture number Fno. of the optical lens satisfies: 1.2 ≤ Fno. ≤ 8.0; the focal length of the first lens and the focal length EFL of the optical lens satisfy: f1 / EFL = 1.03; the focal length f3 of the third lens and the focal length f4 of the fourth lens satisfy: f3 / f4 = -2.35; the radius of curvature R3 of the object-side surface of the second lens near the optical axis and the radius of curvature R4 of its image-side surface near the optical axis satisfy: (R3+R4) / (R3-R4) = 4.93; the total length TTL of the optical lens, the half-image height ImgH that the optical lens can form on its imaging plane, and the aperture number Fno. of the optical lens satisfy: 1.87 ≤ TTL × Fno. / ImgH ≤ 5.74; the center thickness CT5 of the fifth lens, the center thickness CT7 of the seventh lens, and the optical... The half field of view (HFOV) of the lens satisfies: CT7 / [CT5×tan(HFOV)]=0.46; the radius of curvature R12 of the image-side surface of the sixth lens near the optical axis and the focal length EFL of the optical lens satisfy: |EFL / R12|=0.11; the radius of curvature R13 of the object-side surface of the seventh lens and the focal length EFL of the optical lens satisfy: |EFL / R13|=2.10; the total length TTL of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy: 1.74≤TTL / EPD≤5.25; along the optical axis of the optical lens, the distance d1 between the first lens and the second lens satisfies: 0.05≤d1 / dm≤0.16; the center thickness CT1 of the first lens satisfies: 1.6≤CT1 / CTn≤4.89.

[0022] Secondly, this application also provides a camera module, which may include an image sensor and an optical lens as described in any of the aforementioned possible embodiments. The image sensor is disposed on the imaging surface of the optical lens and can be used to convert the light signal transmitted by the optical lens into an image signal. This camera module can meet the shooting needs of different scenarios.

[0023] Thirdly, this application also provides an electronic device, which includes a housing and the camera module described above, with the camera module fixed to the housing. The housing has a light-entry hole, allowing external light to pass through and enter the interior of the electronic device, where it is captured and imaged by the camera module. This electronic device's camera module can meet the shooting needs of different scenarios and provides high image quality. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application;

[0025] Figure 2 for Figure 1 A partial exploded view of an electronic device in China;

[0026] Figure 3 for Figure 1 A partial cross-sectional view of the electronic equipment at point AA;

[0027] Figure 4 This is a schematic diagram of the structure of the camera module provided in the embodiments of this application;

[0028] Figure 5 This is a schematic diagram of the structure of an optical lens provided in an embodiment of this application;

[0029] Figure 6a This is a schematic diagram of the structure of the first camera module provided in the embodiments of this application when it is in the first imaging mode;

[0030] Figure 6b This is a schematic diagram of the structure of the first camera module provided in the embodiments of this application when it is in the second imaging mode;

[0031] Figure 7a An axial chromatic difference curve diagram of the first type of camera module in the first imaging mode provided in the embodiments of this application;

[0032] Figure 7b An axial chromatic difference curve diagram of the first type of camera module in the second imaging mode provided in the embodiments of this application;

[0033] Figure 8a A lateral color difference curve diagram of the first type of camera module in the first imaging mode provided in the embodiments of this application;

[0034] Figure 8b A lateral color difference curve diagram of the first type of camera module in the second imaging mode provided in the embodiments of this application;

[0035] Figure 9a An optical distortion curve diagram of the first type of camera module provided in the embodiments of this application when it is in the first imaging mode;

[0036] Figure 9b An optical distortion curve diagram of the first type of camera module provided in the embodiments of this application when it is in the second imaging mode;

[0037] Figure 10a This is a schematic diagram of the structure of the second optical lens provided in the embodiments of this application when it is in the first imaging mode;

[0038] Figure 10b This is a schematic diagram of the structure of the second optical lens provided in the embodiments of this application when it is in the second imaging mode;

[0039] Figure 11a An axial chromatic aberration curve of the second optical lens provided in the embodiments of this application when it is in the first imaging mode;

[0040] Figure 11bAn axial chromatic aberration curve of the second optical lens in the second imaging mode provided in this application embodiment;

[0041] Figure 12a A lateral chromatic aberration curve diagram of the second type of optical lens provided in the embodiments of this application when it is in the first imaging mode;

[0042] Figure 12b A lateral chromatic aberration curve diagram of the second type of optical lens in the second imaging mode provided in the embodiments of this application;

[0043] Figure 13a An optical distortion curve diagram of the second type of optical lens provided in the embodiments of this application when it is in the first imaging mode;

[0044] Figure 13b An optical distortion curve diagram of the second type of optical lens in the second imaging mode provided in the embodiments of this application;

[0045] Figure 14a This is a schematic diagram of the structure of the third optical lens provided in the embodiments of this application when it is in the first imaging mode;

[0046] Figure 14b A schematic diagram of the structure of the third optical lens provided in the embodiments of this application when it is in the second imaging mode;

[0047] Figure 15a An axial chromatic aberration curve of the third optical lens provided in the embodiments of this application when it is in the first imaging mode;

[0048] Figure 15b An axial chromatic aberration curve of the third optical lens provided in the embodiments of this application when it is in the second imaging mode;

[0049] Figure 16a A lateral chromatic aberration curve diagram of a third optical lens in the first imaging mode provided in this application embodiment;

[0050] Figure 16b A lateral chromatic aberration curve diagram of the third type of optical lens in the second imaging mode provided in this application embodiment;

[0051] Figure 17a An optical distortion curve diagram of the third type of optical lens provided in the embodiments of this application when it is in the first imaging mode;

[0052] Figure 17b An optical distortion curve diagram of the third type of optical lens provided in the embodiments of this application when it is in the second imaging mode;

[0053] Figure 18a This is a schematic diagram of the structure of the fourth optical lens provided in the embodiments of this application when it is in the first imaging mode;

[0054] Figure 18b This is a schematic diagram of the structure of the fourth optical lens in the second imaging mode provided in the embodiments of this application;

[0055] Figure 19a An axial chromatic aberration curve of the fourth optical lens provided in the embodiments of this application when it is in the first imaging mode;

[0056] Figure 19b An axial chromatic aberration curve of the fourth optical lens in the second imaging mode provided in this application embodiment;

[0057] Figure 20a A lateral chromatic aberration curve diagram of a fourth optical lens in the first imaging mode provided in this application embodiment;

[0058] Figure 20b A lateral chromatic aberration curve diagram of the fourth type of optical lens in the second imaging mode provided in the embodiments of this application;

[0059] Figure 21a An optical distortion curve diagram of the fourth optical lens provided in the embodiments of this application when it is in the first imaging mode;

[0060] Figure 21b An optical distortion curve diagram of the fourth type of optical lens provided in the embodiments of this application when it is in the second imaging mode;

[0061] Figure 22a This is a schematic diagram of the structure of the fifth optical lens provided in the embodiments of this application when it is in the first imaging mode;

[0062] Figure 22b A schematic diagram of the structure of the fifth optical lens provided in the embodiments of this application when it is in the second imaging mode;

[0063] Figure 23a The axial chromatic aberration curve of the fifth optical lens provided in the embodiments of this application when it is in the first imaging mode;

[0064] Figure 23b The axial chromatic aberration curve of the fifth optical lens provided in the embodiments of this application when it is in the second imaging mode;

[0065] Figure 24a A lateral chromatic aberration curve diagram of the fifth optical lens provided in the embodiments of this application when it is in the first imaging mode;

[0066] Figure 24b A lateral chromatic aberration curve diagram of the fifth type of optical lens in the second imaging mode provided in this application embodiment;

[0067] Figure 25aThe optical distortion curve of the fifth optical lens provided in the embodiments of this application when it is in the first imaging mode;

[0068] Figure 25b The optical distortion curve of the fifth optical lens provided in the embodiments of this application when it is in the second imaging mode;

[0069] Figure 26a A schematic diagram of the structure of the sixth optical lens provided in the embodiments of this application when it is in the first imaging mode;

[0070] Figure 26b A schematic diagram of the structure of the sixth optical lens provided in the embodiments of this application when it is in the second imaging mode;

[0071] Figure 27a An axial chromatic aberration curve of the sixth optical lens provided in the embodiments of this application when it is in the first imaging mode;

[0072] Figure 27b An axial chromatic aberration curve of the sixth optical lens in the second imaging mode provided in this application embodiment;

[0073] Figure 28a A lateral chromatic aberration curve diagram of the sixth optical lens in the first imaging mode provided in the embodiments of this application;

[0074] Figure 28b A lateral chromatic aberration curve diagram of the sixth type of optical lens in the second imaging mode provided in the embodiments of this application;

[0075] Figure 29a An optical distortion curve diagram of the sixth type of optical lens provided in the embodiments of this application when it is in the first imaging mode;

[0076] Figure 29b The optical distortion curve of the sixth optical lens provided in the embodiments of this application when it is in the second imaging mode.

[0077] Figure label:

[0078] 1-Electronic device; 100-Housing; 200-Display screen; 300-Circuit board; 400-Camera module; 110-Middle frame; 120-Back cover;

[0079] 210 - Display panel; 220 - First cover plate; 310 - Clearance space; 1201 - Light inlet; 1202 - Camera decorative piece;

[0080] 1203 - Second cover plate; 410 - Optical lens; 420 - Module circuit board; 430 - Image sensor; 440 - Filter;

[0081] 421 - Settling tank; 450 - Support component. Detailed Implementation

[0082] To facilitate understanding of the optical lens provided in the embodiments of this application, the relevant English abbreviations and nouns involved in this application will be briefly explained first:

[0083] F#F-number: F-number / aperture is a relative value derived from the lens's focal length and the lens's entrance pupil diameter (the reciprocal of the relative aperture). The smaller the aperture F-number, the more light enters the lens in the same unit of time. The larger the aperture F-number, the shallower the depth of field, and the background content of the photo will be blurred, similar to the effect of a telephoto lens.

[0084] EFL (Effective Focal Length) refers to the effective focal length of a lens.

[0085] TTL total track length, the total length of the lens, specifically refers to the distance from the surface of the lens closest to the subject to the image plane;

[0086] FOV (Field of View)

[0087] HFOV (Half-FOV) refers to the angle of view within half the field of view.

[0088] EPD (entrance pupil diameter)

[0089] Optical 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 optical power has a positive focal length and can converge light; a lens with negative optical power has a negative focal length and can diverge light.

[0090] The object side can be understood as the side closer to the object being photographed, and the image side can be understood as the side closer to the imaging plane;

[0091] The object-side surface of a lens is the side of the lens closest to the object being captured, and the image-side surface of a lens is the side of the lens closest to the imaging plane.

[0092] The near-optical axis can be understood as the area on the lens surface close to the optical axis.

[0093] Please refer to Figure 1 As shown, Figure 1This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device 1 can be a mobile phone, tablet personal computer, laptop computer, personal digital assistant (PDA), camera, personal computer, laptop computer, in-vehicle equipment, wearable device, augmented reality (AR) glasses, AR helmet, virtual reality (VR) glasses or VR helmet, or other forms of devices with photography and video recording functions. Figure 1 The electronic device in the illustrated embodiment is a mobile phone as an example.

[0094] Figure 2 for Figure 1 A partially exploded view of the electronic equipment. Please refer to this diagram as well. 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 accompanying drawings below only schematically illustrate some components of the electronic device 1; the actual shape, size, location, and construction of these components are not subject to change. Figure 1 , Figure 2 As well as the limitations of the accompanying figures below.

[0095] For ease of description, we define the width direction of electronic device 1 as the x-axis, the length direction as the y-axis, and the thickness direction as the z-axis, where the x, y, and z axes are all perpendicular to each other. It is understood that the coordinate system of electronic device 1 can be flexibly set according to specific practical needs.

[0096] The housing 100 may include a middle frame 110 and a back cover 120, with the back cover 120 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 a single integral structure.

[0097] In other embodiments, housing 100 may also include a middle plate (not shown). The middle plate is connected to the inside of middle frame 110 and is spaced apart from and opposite to rear cover 120.

[0098] Please refer to this again. Figure 2The display screen 200 is fixed to the middle frame 110 on the opposite side of the back cover 120. At this time, the display screen 200 and the back cover 120 are positioned opposite each other. The display screen 200, the middle frame 110, and the back cover 120 together enclose the interior of the electronic device 1. The interior of the electronic device 1 can be used to house components of the electronic device 1, such as the circuit board 300, the camera module 400, the battery, the receiver, and the microphone.

[0099] In this embodiment, the display screen 200 can be used to display images, text, 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, with the first cover plate 220 stacked on the side of the display panel 210 facing away from the middle frame 110. The first cover plate 220 can be set tightly against the display panel 210 and mainly serves to protect the display panel 210 and prevent dust. The first cover plate 220 is made of a transparent material, such as glass or plastic. The display panel 210 can be a liquid crystal display (LCD), an organic light-emitting diode (OLED) display panel, an active-matrix organic light-emitting diode (AMOLED) display panel, a quantum dot light-emitting diode (QLED) display panel, or a micro light-emitting diode (Micro LED) display panel, etc.

[0100] Figure 3 for Figure 1 A partial cross-sectional view of the electronic equipment at point AA. See also... Figure 2 and Figure 3The 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 rear cover 120. In other embodiments, when the middle frame 110 includes a middle plate, the circuit board 300 can be fixed to the surface of the middle plate facing the rear cover 120. It is understood that the circuit board 300 can be a rigid circuit board, a flexible circuit board, or a rigid-flex circuit board. The circuit board 300 can be used to carry electronic devices such as chips, capacitors, and inductors, and can realize electrical connections between electronic devices. The chips can be central processing units (CPUs), graphics processing units (GPUs), digital signal processing (DSPs), and universal flash storage (UFS), etc.

[0101] Please continue to refer to this. Figure 2 and Figure 3 The camera module 400 is fixed inside the housing 100 and is used to enable the electronic device 1 to perform functions such as taking pictures or recording videos. Specifically, the camera module 400 can be fixed to the side of the display screen 200 facing the rear cover 120. In other embodiments, when the middle frame 110 includes a middle plate, the camera module 400 can also be fixed to the surface of the middle plate facing the rear cover 120.

[0102] Additionally, a clearance space 310 may be provided on the circuit board 300. The shape of the clearance space 310 may be a shape that matches the shape of the camera module 400, for example... Figure 2 The rectangular shape is shown. Of course, in other embodiments, the clearance space 310 can also be circular, elliptical, or other irregular shapes, etc., and this application does not impose specific limitations on this. The camera module 400 is located within the clearance space 310. In this way, the camera module 400 and the circuit board 300 have an overlapping area in the z-axis direction, thereby avoiding an 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 not have a clearance space 310. In this case, the camera module 400 can be directly stacked on the circuit board 300, or it can be spaced apart from the circuit board 300 by other support structures.

[0103] 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 via the circuit board 300. When the CPU receives a user's instruction, it can send a signal to the camera module 400 via the circuit board 300 to control the camera module 400 to capture images or record videos. In other embodiments, when the electronic device 1 does not have the circuit board 300, the camera module 400 can also directly receive user instructions and capture images or record videos according to the user's instructions.

[0104] Please refer to this again. Figure 3 The rear cover 120 has a light inlet 1201, which connects the interior of the electronic device 1 to the exterior. The electronic device 1 also includes a camera decorative element 1202 and a second cover plate 1203. Part of the camera decorative element 1202 is fixed to the inner surface of the rear cover 120, while another part contacts the wall of the light inlet 1201. The second cover plate 1203 is fixedly connected to the inner wall of the camera decorative element 1202. The camera decorative element 1202 and the second cover plate 1203 separate the interior of the electronic device 1 from its exterior, thus preventing water or dust from entering the interior of the electronic device 1 through the light inlet 1201. The second cover plate 1203 is made of a transparent material, such as glass or plastic. Ambient light from outside the electronic device 1 can pass through the second cover plate 1203 and enter the interior of the electronic device 1. The camera module 400 collects the ambient light entering the interior of the electronic device 1.

[0105] It is understandable that the shape of the light inlet aperture 1201 is not limited to the attached... Figure 1 and appendix Figure 2 The shape shown is a circle. For example, the shape of the light inlet 1201 can also be elliptical or other irregular shapes.

[0106] In other embodiments, the camera module 400 can also capture ambient light passing through the back cover 120. Specifically, the back cover 120 is made of a transparent material, such as glass or plastic. The surface of the back cover 120 facing the interior of the electronic device 1 is coated with ink, while other parts are not coated with ink. The uncoated areas form light-transmitting areas. When ambient light enters the interior of the electronic device 1 through these light-transmitting areas, the camera module 400 can capture the ambient light. In other words, the electronic device 1 of this embodiment does not require a light-entry hole, nor does it require a camera decorative element 1202 or a second cover plate 1203; the overall integrity of the electronic device 1 is better, and the cost is lower.

[0107] It is worth mentioning that in some other embodiments, the camera module 400 can also be fixed to the side of the rear cover 120 facing the display screen 200. In this case, an opening can be provided on the display panel 210, allowing light from outside the electronic device 1 to pass through the first cover plate 220 and the opening sequentially into the interior of the electronic device 1, where it is captured by the camera module 400 and forms an image or video. That is to say, the camera module 400 in this embodiment can be used as either a front-facing camera module or a rear-facing camera module, depending on the functional requirements of the electronic device 1, which will not be elaborated further here.

[0108] Please refer to Figure 4 As shown, Figure 4 This is a schematic diagram of the camera module provided in an embodiment of this application. The camera module 400 may include an optical lens 410, a module circuit board 420, an image sensor 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.

[0109] The optical lens 410 can be installed between the subject (object plane) and the image sensor 430 (image plane). The optical lens 410 is used to form an image (i.e., light signal) of the subject, and the image sensor 430 is used to convert the image (i.e., light signal) of the subject into an image signal and output it, so as to realize the photo taking or video recording function of the camera module.

[0110] 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 signals can be transmitted between the circuit board and the module circuit board 420. It is understood that the module circuit board 420 can be a rigid circuit board, a flexible circuit board, or a rigid-flex circuit board, and this application does not limit it in this way.

[0111] Please continue to refer to this. Figure 4 The image sensor 430 is fixed to the side of the module circuit board 420 facing the optical lens 410. The image sensor 430 is electrically connected to the module circuit board 420. Thus, after the image sensor 430 collects ambient light, it generates a signal based on the ambient light and transmits the signal to the circuit board via the module circuit board 420. In specific implementations, the image sensor 430 can be a complementary metal-oxide-semiconductor (CMOS) device or a charge-coupled device (CCD) image sensor, etc.

[0112] In other embodiments, electronic components or other chips (such as driver chips) may also be mounted on the module circuit board 420. These electronic components or other chips are located around the image sensor 430. They assist the image sensor 430 in acquiring ambient light and in processing the acquired ambient light signals.

[0113] In other embodiments, the module circuit board 420 may have a recessed groove 421 partially formed, in which case the image sensor 430 can be installed within the recessed groove 421. This results in an overlap between the image sensor 430 and the module circuit board 420 in the z-axis direction, allowing the camera module 400 to be made thinner in the z-axis direction.

[0114] Please continue to refer to this. Figure 4 The filter 440 is located on the side of the image sensor 430 facing the optical lens 410. The filter 440 filters stray ambient light passing through the optical lens 410 and allows the filtered ambient light to pass through the image sensor 430, thereby ensuring better image clarity when captured by the electronic device. 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 dual-pass filter (a dual-pass filter allows visible and infrared light in ambient light to pass through simultaneously, or allows visible light in ambient light and other specific wavelengths of light (e.g., ultraviolet light) to pass through simultaneously, or allows infrared light and other specific wavelengths of light (e.g., ultraviolet light) to pass through simultaneously).

[0115] To fix the position of the filter 440, the camera module 400 may further include a support member 450 disposed between the optical lens 410 and the module circuit board 420. The two sides of the support member 450 are fixedly connected to the optical lens 410 and the module circuit board 420 respectively, specifically by adhesive bonding. The filter 440 may be disposed on one side of the support member 450. A through hole 451 is provided on the support member 450 corresponding to the area of ​​the image sensor 430 to allow ambient light to smoothly enter the image sensor 430.

[0116] In a camera module, the optical lens is the most critical component affecting image quality. The zoom range, resolution, and depth of field of an optical lens all influence its imaging performance. Depth of field refers to the range of distances in front of and behind the subject that can be captured in sharp focus by the lens's front edge; it can also be understood as the range of distances in front of and behind the focal point that produce a sharp image after the lens has focused. The depth of field of an optical lens is related to its aperture: a larger aperture results in a shallower depth of field, and a smaller aperture results in a deeper depth of field. Therefore, in some shooting scenarios, a small-aperture lens is needed to ensure both foreground and background objects are sharp; conversely, a large-aperture lens is required to emphasize the main subject. However, most optical lenses currently used in mobile phones and other electronic devices employ a fixed aperture design, which cannot accommodate the diverse shooting needs of different scenarios. This limits the photographic performance of electronic devices and hinders further improvements in their overall performance.

[0117] To address the aforementioned issues, this application also provides an optical lens that employs a variable aperture structure and incorporates a matching design of relevant lens parameters, enabling the optical lens to provide different depth-of-field ranges for different scenes, thereby accommodating shooting needs across multiple scenarios.

[0118] refer to Figure 5 As shown, Figure 5 This is a schematic diagram of the structure of an optical lens provided in an embodiment of this application. The optical lens 410 may include multiple lenses with optical power and a variable aperture ST, wherein the variable aperture ST may be disposed on the object side of the multiple lenses, and its light-passing diameter is adjustable. It can be understood that by adjusting the light-passing diameter of the variable aperture ST, the amount of light entering the optical lens 410 can be adjusted, and the aperture number Fno. of the optical lens 410 can be adjusted, thereby realizing the adjustment of the depth of field of the optical lens 410. In specific implementations, the variable aperture ST may adopt a "cat's eye" aperture, an "iris" aperture, an instantaneous aperture, a shutter aperture, etc., and this application does not limit it in this way.

[0119] For example, the number of lenses can be seven, arranged from the object side to the image side. These seven lenses are designated as 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. In specific implementations, these lenses can be aspherical lenses, which can eliminate aberrations and improve the imaging quality of the optical lens 410. In this case, each lens can be made of resin to reduce the manufacturing difficulty and cost of the optical lens 410. Of course, in some other embodiments, each lens can also be made of glass; or some lenses can be made of glass and some lenses can be made of resin. The specific choice can be made according to the actual application, and this application does not impose any restrictions on this.

[0120] Among the lenses of the optical lens 410, the first lens L1 can have positive optical power. The object-side surface of the first lens L1 is convex at the optical axis and the image-side surface is concave at the optical axis. The focal length f1 of the first lens L1 and the focal length EFL of the optical lens 410 satisfy: 0≤f1 / EFL≤1.1.

[0121] The second lens L2 can have negative optical power. The object-side surface of the second lens L2 is convex near the optical axis, and the image-side surface is concave near the optical axis. In addition, the radius of curvature R3 of the object-side surface of the second lens L2 near the optical axis and the radius of curvature R4 of its image-side surface near the optical axis satisfy: 1.8≤(R3+R4) / (R3-R4)≤6.3. This setting helps to balance the optical power matching of the optical lens 410 and shorten the total length (TTL) of the optical lens 410.

[0122] The object-side surface of the third lens L3 is concave near the optical axis. The focal length f3 of the third lens L3 and the focal length f4 of the fourth lens L4 satisfy: -4≤f3 / f4≤-1.3.

[0123] The center thickness CT5 of the fifth lens L5, the center thickness CT7 of the seventh lens L7, and the half field of view HFOV of the optical lens 410 satisfy: 0≤CT7 / [CT5×tan(HFOV)]≤1.1.

[0124] The radius of curvature R12 of the image-side surface of the sixth lens L6 near the optical axis satisfies the following condition with the focal length EFL of the optical lens 410: 0≤|EFL / R12|≤0.46, which is beneficial for the sixth lens L6 to form a better match with other lenses.

[0125] The object-side surface of the seventh lens L7 is a curved surface, which helps improve the edge field-of-view image quality of the camera module. Furthermore, the radius of curvature R13 of the object-side surface of the seventh lens L7 satisfies the condition 0 ≤ |EFL / R13| ≤ 2.2 with the focal length EFL of the optical lens 410. This design facilitates the seventh lens in correcting edge field-of-view aberrations and shortens the total length (TTL) of the optical lens 410.

[0126] The total length TTL of the optical lens 410, the half-image height ImgH that the optical lens 410 can form on its imaging surface, and the aperture number Fno. of the optical lens 410 satisfy: TTL×Fno. / ImgH≥1.8.

[0127] The total length TTL of the optical lens 410 and the entrance pupil diameter EPD of the optical lens 410 satisfy: 1.5≤TTL / EPD≤10. This can better control the amount of light entering the optical lens 410 and maintain the total length TTL of the optical lens 410.

[0128] Along the optical axis of the optical lens 410, the spacing between the lenses of the optical lens 410 also satisfies certain conditions. Specifically, the spacing between the first lens L1 and the second lens L2 is defined as d1, the spacing between the second lens L2 and the third lens L3 is defined as d2, the spacing between the third lens L3 and the fourth lens L4 is defined as d3, the spacing between the fourth lens L4 and the fifth lens L5 is defined as d4, the spacing between the fifth lens L5 and the sixth lens L6 is defined as d5, and the spacing between the sixth lens L6 and the seventh lens L7 is defined as d7. dm represents any value between d2, d3, d4, d5, and d6, and d1 / dm ≤ 1. This spacing arrangement improves the overall mechanical strength of the optical lens 410. It should be noted that the spacing d1 between the first lens L1 and the second lens L2 can be understood as the distance along the optical axis between the center of the image-side surface of the first lens L1 and the center of the object-side surface of the second lens L2. Similarly, the spacing between other adjacent lenses can also refer to the definition of d1, which will not be elaborated here.

[0129] Furthermore, the center thickness of the first lens L1 is defined as CT1, the center thickness of the second lens L2 is CT1, the center thickness of the third lens L3 is CT3, the center thickness of the fourth lens L4 is CT4, the center thickness of the fifth lens L5 is CT5, the center thickness of the sixth lens L6 is CT6, and the center thickness of the seventh lens L7 is CT7. CTn represents any value among CT2, CT3, CT4, CT5, CT6, and CT7, and CT1 and CT7 satisfy CT1 / CTn≥1. Using this thickness combination, combined with the optical power combination of the optical lens 410, allows the optical lens 410 to achieve better image quality. The center thickness of the lens can be understood as the thickness at the center of the lens, that is, the thickness at the point where the optical axis passes through the lens.

[0130] As described above, the optical lens 410 of this embodiment can adjust the aperture number Fno. by changing the light-transmitting diameter of the variable aperture ST. Different light-transmitting diameters correspond to different aperture numbers Fno., that is, different depths of field, thereby allowing the optical lens 410 to adapt to different shooting scenarios. The light-transmitting diameter of the variable aperture ST can be adjusted between a first light-transmitting diameter and a second light-transmitting diameter, where the first light-transmitting diameter is larger than the second light-transmitting diameter. When the light-transmitting diameter of the variable aperture ST is the first light-transmitting diameter, the aperture number Fno. of the optical lens 410 is F1, and the optical lens 410 in this state is defined as a first imaging mode; when the light-transmitting diameter of the variable aperture ST is the second light-transmitting diameter, the aperture number Fno. of the optical lens 410 is F2, and the optical lens 410 in this state is defined as a second imaging mode. It is understood that F1 < F2. For example, the value of F1 can be 1.2 and the value of F2 can be 8.0. That is, the aperture number Fno. of the optical lens 410 in this embodiment can be between 1.2 and 8.0.

[0131] Please refer to the above. Figure 6a and Figure 6b As shown, Figure 6a This is a schematic diagram of the structure of the first optical lens in the first imaging mode according to an embodiment of this application. Figure 6b This is a schematic diagram of the structure of the first optical lens provided in the embodiment of this application when it is in the second imaging mode. When the optical lens 410 is in the first imaging mode, the aperture number Fno. of the optical lens 410 is relatively small, which has the characteristics of a large aperture. Therefore, it can make the depth of field shallower and make the focus point clear, while other objects outside the depth of field will be blurred, thereby better highlighting the subject and simplifying the picture. In addition, using a large aperture also means that the light entering the optical lens per unit time will increase. When the exposure of the picture remains unchanged, the shutter speed can be increased in the first imaging mode. When shooting handheld in low light or dark environments, the increase in shutter speed can reduce the impact of hand shake on the image sharpness, thereby helping the camera module to shoot better night scene pictures. When the optical lens 410 is in the second imaging mode, the aperture number Fno. of the optical lens 410 is relatively large, and it has the characteristics of a small aperture. Therefore, it can obtain a large depth of field, so that the background or foreground other than the subject in focus 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. This is beneficial for leaving motion traces on the image of moving objects. Therefore, the optical lens 410 can also shoot scenes such as flowing water, car trails, star trails and light painting in the second imaging mode.

[0132] It should be understood that the optical lens 410 provided in this application embodiment is not limited to the two imaging modes described above. For example, when the light-transmitting diameter of the variable aperture ST is adjusted to another value between the first and second light-transmitting diameters, the aperture number Fno. of the optical lens 410 is also adjusted accordingly to another value between 1.2 and 8.0. For example, the aperture number Fno. can also be 2.0, 2.8, 4, 5.6, etc. For each aperture number Fno., the optical lens 410 can realize a corresponding imaging mode, thereby adapting to more shooting scenarios.

[0133] As can be seen from the above description, the optical lens 410 of this application embodiment adopts a variable aperture structure design, which can provide different depth of field ranges for different scenes. Therefore, it can take into account the shooting needs of multiple scenes. In addition, the optical lens 410, together with an image sensor with a large target surface, can achieve better optical quality, thereby improving the imaging quality of the camera module.

[0134] To facilitate understanding of the shooting effects of the optical lens 410 provided in this application embodiment under different scenarios, the imaging effects of the optical lens 410 in the first imaging mode and the second imaging mode will be described in detail below with reference to specific embodiments.

[0135] Please refer to this again. Figure 6a and Figure 6b The optical lens 410 includes a variable aperture ST and seven lenses with optical power. The seven lenses are 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. The variable aperture ST is located on the object side of the first lens L1. Additionally, the image filter 440 of the camera module is located on the image side of the seventh lens L7, and the image sensor 430 is located on the image side of the filter 440.

[0136] In this embodiment, the aperture number Fno. of the optical lens 410 satisfies: 1.2≤Fno.≤4.0. In the first imaging mode, the aperture number Fno. of the optical lens 410 is 1.2, and in the second imaging mode, the aperture number Fno. of the optical lens 410 is 4.0.

[0137] The focal length f1 of the first lens L1 and the focal length EFL of the optical lens 410 satisfy: f1 / EFL=1;

[0138] The focal length f3 of the third lens L3 and the focal length f4 of the fourth lens L4 satisfy: f3 / f4=-1.4;

[0139] The radius of curvature R3 of the object-side surface of the second lens L2 near the optical axis and the radius of curvature R4 of its image-side surface near the optical axis satisfy: (R3+R4) / (R3-R4)=5;

[0140] The total length TTL of the optical lens 410, the half-image height ImgH that the optical lens 410 can form on its imaging plane, and the aperture number Fno of the optical lens 410 satisfy: 1.9≤TTL×F / ImgH≤5.5;

[0141] The center thickness CT5 of the fifth lens L5, the center thickness CT7 of the seventh lens L7, and the half field of view HFOV of the optical lens 410 satisfy: CT7 / [CT5×tan(HFOV)]=0.8;

[0142] The radius of curvature R12 of the image-side surface of the sixth lens L6 near the optical axis satisfies the following condition with respect to the focal length EFL of the optical lens 410: |EFL / R12|=0.4;

[0143] The radius of curvature R13 of the object-side surface of the seventh lens L7 and the focal length EFL of the optical lens 410 satisfy: |EFL / R13|=0.3;

[0144] The total length TTL of the optical lens 410 and the entrance pupil diameter EPD of the optical lens 410 satisfy: 1.84≤TTL / EPD≤4.8;

[0145] Along the optical axis of the optical lens 410, the distance d1 between the first lens L1 and the second lens L2 satisfies: 0.1≤d1 / dm≤0.5, where dm is the distance between the m-th lens and the (m+1)-th lens, m is a natural number and 2≤m≤6;

[0146] The center thickness CT1 of the first lens L1 satisfies: 1.4≤CT1 / CTn≤3.5, where CTn is the center thickness of the nth lens, n is a natural number and 2≤n≤7.

[0147] For other design parameters of the optical lens 410, please refer to Table 1.

[0148] Table 1

[0149] F value 1.2～4.0 Half field of view (HFOV) 42.4° Total length of the optical lens (TTL, mm) 7.24 Design wavelength 650nm, 610nm, 555nm, 510nm, 470nm

[0150] In this embodiment, each lens of the optical lens 410 can be an aspherical lens, meaning the optical lens 410 contains a total of 14 aspherical surfaces. Referring to Tables 2 and 3, 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 coefficients of each lens. In Tables 2 and 3, S1 and S2 represent the object-side and image-side surfaces of the first lens, respectively; S3 and S4 represent the object-side and image-side surfaces of the second lens, respectively; S5 and S6 represent the object-side and image-side surfaces of the third lens, respectively; S7 and S8 represent the object-side and image-side surfaces of the fourth lens, respectively; S9 and S10 represent the object-side and image-side surfaces of the fifth lens, respectively; S11 and S12 represent the object-side and image-side surfaces of the sixth lens, respectively; and S13 and S14 represent the object-side and image-side surfaces of the seventh lens, respectively.

[0151] Table 2

[0152]

[0153]

[0154] Table 3

[0155]

[0156]

[0157] Of the 14 aspherical surfaces of the optical lens 410 shown in Table 3, all extended aspherical surface types z can be defined using, but are not limited to, the following aspherical formulas:

[0158]

[0159] Where z is the aspherical elevation, r is the normalized radial coordinate of the aspherical surface, r equals the actual radial coordinate of the aspherical surface divided by the normalized radius r0, c is the spherical curvature at the vertex of the aspherical surface, K is the quadratic surface constant, and Ax is the aspherical coefficient. It is an aspherical polynomial. Px is a Jacobian polynomial.

[0160] right Figure 6a and Figure 6b The optical lens shown is simulated, and the simulation results are explained in detail below with reference to the attached figures.

[0161] Figure 7aThe axial chromatic aberration curve of the first optical lens provided in the embodiments of this application in the first imaging mode is shown. Along the direction away from the origin, the values ​​of each scale on the vertical axis are 0.25, 0.50, 0.75, and 1.00, respectively. The figure shows the simulation results of the focusing depth position of the colored light at wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm. It can be seen that the axial chromatic aberration of the optical lens in the first imaging mode is controlled within a very small range.

[0162] Figure 7b The axial chromatic aberration curve of the first optical lens provided in this application embodiment when in the second imaging mode is shown. Along the direction away from the origin, the values ​​of each scale on the vertical axis are 0.25, 0.50, 0.75, and 1.00, respectively. The figure shows the simulation results of the focusing depth positions of colored light at wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm. It can be seen that the axial chromatic aberration of the optical lens in the second imaging mode is controlled within a very small range.

[0163] Figure 8a The first optical lens provided in this application embodiment is shown in the lateral chromatic aberration curve diagram when it is in the first imaging mode. The five solid curves in the figure are colored lights with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively. It can be seen that the lateral chromatic aberration of the optical lens in the first imaging mode is controlled within a very small range.

[0164] Figure 8b The first optical lens provided in this application embodiment is shown in the lateral chromatic aberration curve diagram when it is in the second imaging mode. The five solid curves in the figure are colored lights with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively. It can be seen that the lateral chromatic aberration of the optical lens in the second imaging mode is controlled within a very small range.

[0165] Figure 9a The optical distortion curve of the first optical lens provided in the embodiments of this application in the first imaging mode shows the difference between the imaging deformation and the ideal shape. It can be seen that the optical distortion can be basically controlled within the range of less than 2.5% in this mode.

[0166] Figure 9b The optical distortion curve of the first optical lens provided in the embodiments of this application in the second imaging mode shows the difference between the imaging deformation and the ideal shape. It can be seen that the optical distortion can be basically controlled within the range of less than 2.5% in this mode.

[0167] Please refer to this as well. Figure 10a and Figure 10b As shown, Figure 10aThis is a schematic diagram of the structure of the second type of camera module provided in the embodiments of this application when it is in the first imaging mode. Figure 10b This is a schematic diagram of the second type of camera module provided in this application when it is in the second imaging mode. The optical lens 410 includes a variable aperture ST and seven lenses with optical power. The seven lenses are 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. 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 image sensor 430 is located on the image side of the filter 440.

[0168] In this embodiment, the aperture number Fno. of the optical lens 410 satisfies: 1.2≤Fno.≤4.0. In the first imaging mode, the aperture number Fno. of the optical lens 410 is 1.2, and in the second imaging mode, the aperture number Fno. of the optical lens 410 is 4.0.

[0169] The focal length f1 of the first lens L1 and the focal length EFL of the optical lens 410 satisfy: f1 / EFL=0.98;

[0170] The focal length f3 of the third lens L3 and the focal length f4 of the fourth lens L4 satisfy: f3 / f4=-1.64;

[0171] The radius of curvature R3 of the object-side surface of the second lens L2 near the optical axis and the radius of curvature R4 of its image-side surface near the optical axis satisfy: (R3+R4) / (R3-R4)=3.68;

[0172] The total length TTL of the optical lens 410, the half-image height ImgH that the optical lens 410 can form on its imaging plane, and the aperture number Fno. of the optical lens 410 satisfy: 2.0≤TTL×Fno. / ImgH≤5.6;

[0173] The center thickness CT5 of the fifth lens L5, the center thickness CT7 of the seventh lens L7, and the half field of view HFOV of the optical lens 410 satisfy: CT7 / [CT5×tan(HFOV)]=0.42;

[0174] The radius of curvature R12 of the image-side surface of the sixth lens L6 near the optical axis satisfies the following condition with respect to the focal length EFL of the optical lens 410: |EFL / R12|=0.32;

[0175] The radius of curvature R13 of the object-side surface of the seventh lens L7 and the focal length EFL of the optical lens 410 satisfy: |EFL / R13|=0.37;

[0176] The total length TTL of the optical lens 410 and the entrance pupil diameter EPD of the optical lens 410 satisfy: 1.84≤TTL / EPD≤9.80;

[0177] Along the optical axis of the optical lens 410, the distance d1 between the first lens L1 and the second lens L2 satisfies: 0.04≤d1 / dm≤0.21, where dm is the distance between the m-th lens and the (m+1)-th lens, m is a natural number and 2≤m≤6;

[0178] The center thickness CT1 of the first lens L1 satisfies: 1.78≤CT1 / CTn≤5.00, where CTn is the center thickness of the nth lens, n is a natural number and 2≤n≤7.

[0179] For other design parameters of the optical lens 410, please refer to Table 4.

[0180] Table 4

[0181]

[0182]

[0183] In this embodiment, each lens of the optical lens 410 can be an aspherical lens, meaning the optical lens 410 contains a total of 14 aspherical surfaces. Referring also to Tables 5 and 6, 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 coefficients of each lens. In Tables 5 and 6, S1 and S2 represent the object-side and image-side surfaces of the first lens, respectively; S3 and S4 represent the object-side and image-side surfaces of the second lens, respectively; S5 and S6 represent the object-side and image-side surfaces of the third lens, respectively; S7 and S8 represent the object-side and image-side surfaces of the fourth lens, respectively; S9 and S10 represent the object-side and image-side surfaces of the fifth lens, respectively; S11 and S12 represent the object-side and image-side surfaces of the sixth lens, respectively; and S13 and S14 represent the object-side and image-side surfaces of the seventh lens, respectively.

[0184] Table 5

[0185]

[0186] Table 6

[0187]

[0188]

[0189] Of the 14 aspherical surfaces of the optical lens 410 shown in Table 6, all extended aspherical surface types z can be defined using, but are not limited to, the following aspherical formulas:

[0190]

[0191] Where z is the aspherical elevation, r is the normalized radial coordinate of the aspherical surface, r equals the actual radial coordinate of the aspherical surface divided by the normalized radius r0, c is the spherical curvature at the vertex of the aspherical surface, K is the quadratic surface constant, and Ax is the aspherical coefficient. It is an aspherical polynomial. Px is a Jacobian polynomial.

[0192] right Figure 10a and Figure 10b The optical lens shown is simulated, and the simulation results are explained in detail below with reference to the attached figures.

[0193] Figure 11a The axial chromatic aberration curve of the second optical lens provided in this application embodiment when in the first imaging mode is shown. Along the direction away from the origin, the values ​​of each scale on the vertical axis are 0.25, 0.50, 0.75, and 1.00, respectively. The figure shows the simulation results of the focusing depth positions of colored light at wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm. It can be seen that the axial chromatic aberration of the optical lens in the first imaging mode is controlled within a very small range.

[0194] Figure 11b The axial chromatic aberration curve of the second optical lens provided in this application embodiment when in the second imaging mode is shown. Along the direction away from the origin, the values ​​of each scale on the vertical axis are 0.25, 0.50, 0.75, and 1.00, respectively. The figure shows the simulation results of the focusing depth position of the colored light at wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm. It can be seen that the axial chromatic aberration of the optical lens in the second imaging mode is controlled within a very small range.

[0195] Figure 12a The second type of optical lens provided in this application embodiment is shown in the lateral chromatic aberration curve diagram when it is in the first imaging mode. The five solid curves in the figure are colored lights with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively. It can be seen that the lateral chromatic aberration of the optical lens in the first imaging mode is controlled within a very small range.

[0196] Figure 12b The second optical lens provided in this application embodiment is shown in the lateral chromatic aberration curve diagram when it is in the second imaging mode. The five solid curves in the figure are colored lights with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively. It can be seen that the lateral chromatic aberration of the optical lens in the second imaging mode is controlled within a very small range.

[0197] Figure 13a The optical distortion curve of the second optical lens provided in the embodiments of this application in the first imaging mode shows the difference between the imaging deformation and the ideal shape. It can be seen that the optical distortion can be basically controlled within the range of less than 2.5% in this mode.

[0198] Figure 13b The optical distortion curve of the second optical lens provided in the embodiments of this application in the second imaging mode shows the difference between the imaging deformation and the ideal shape. It can be seen that in this mode, the optical distortion can be basically controlled within the range of less than 2.5%.

[0199] Please refer to this as well. Figure 14a and Figure 14b As shown, Figure 14a This is a schematic diagram of the structure of the third optical lens provided in the embodiments of this application when it is in the first imaging mode. Figure 14b This is a schematic diagram of the structure of the third optical lens provided in the embodiments of this application when it is in the second imaging mode. The optical lens 410 includes a variable aperture ST and seven lenses with optical power. The seven lenses are 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. The variable aperture ST is located on the object side of the first lens L1. Additionally, the filter 440 of the camera module is located on the image side of the seventh lens L7, and the image sensor 430 is located on the image side of the filter 440.

[0200] In this embodiment, the aperture number Fno. of the optical lens 410 satisfies: 1.2≤Fno.≤4.0. In the first imaging mode, the aperture number Fno. of the optical lens 410 is 1.2, and in the second imaging mode, the aperture number Fno. of the optical lens 410 is 4.0.

[0201] The focal length f1 of the first lens L1 and the focal length EFL of the optical lens 410 satisfy: f1 / EFL=1.1;

[0202] The focal length f3 of the third lens L3 and the focal length f4 of the fourth lens L4 satisfy: f3 / f4=-4;

[0203] The radius of curvature R3 of the object-side surface of the second lens L2 near the optical axis and the radius of curvature R4 of its image-side surface near the optical axis satisfy: (R3+R4) / (R3-R4)=5.73;

[0204] The total length TTL of the optical lens 410, the half-image height ImgH that the optical lens 410 can form on its imaging plane, and the aperture number Fno of the optical lens 410 satisfy: 2.33≤TTL×F / ImgH≤6.24;

[0205] The center thickness CT5 of the fifth lens L5, the center thickness CT7 of the seventh lens L7, and the half field of view HFOV of the optical lens 410 satisfy: CT7 / [CT5×tan(HFOV)]=1;

[0206] The radius of curvature R12 of the image-side surface of the sixth lens L6 near the optical axis satisfies the following condition with respect to the focal length EFL of the optical lens 410: |EFL / R12|=0.39;

[0207] The radius of curvature R13 of the object-side surface of the seventh lens L7 and the focal length EFL of the optical lens 410 satisfy: |EFL / R13|=2.19;

[0208] The total length TTL of the optical lens 410 and the entrance pupil diameter EPD of the optical lens 410 satisfy: 1.96≤TTL / EPD≤5.33;

[0209] Along the optical axis of the optical lens 410, the distance d1 between the first lens L1 and the second lens L2 satisfies: 0.07≤d1 / dm≤0.22, where dm is the distance between the m-th lens and the (m+1)-th lens, m is a natural number and 2≤m≤6;

[0210] The center thickness CT1 of the first lens L1 satisfies: 1.25≤CT1 / CTn≤5.00, where CTn is the center thickness of the nth lens, n is a natural number and 2≤n≤7.

[0211] For other design parameters of the optical lens 410, please refer to Table 7.

[0212] Table 7

[0213] F value 1.2～4.0 Half field of view (HFOV) 39.8° Total length of the optical lens (TTL, mm) 8 Design wavelength 650nm, 610nm, 555nm, 510nm, 470nm

[0214] In this embodiment, each lens of the optical lens 410 can be an aspherical lens, meaning the optical lens 410 contains a total of 14 aspherical surfaces. Referring to Tables 8 and 9, 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 coefficients of each lens. In Tables 8 and 9, S1 and S2 represent the object-side and image-side surfaces of the first lens, respectively; S3 and S4 represent the object-side and image-side surfaces of the second lens, respectively; S5 and S6 represent the object-side and image-side surfaces of the third lens, respectively; S7 and S8 represent the object-side and image-side surfaces of the fourth lens, respectively; S9 and S10 represent the object-side and image-side surfaces of the fifth lens, respectively; S11 and S12 represent the object-side and image-side surfaces of the sixth lens, respectively; and S13 and S14 represent the object-side and image-side surfaces of the seventh lens, respectively.

[0215] Table 8

[0216]

[0217]

[0218] Table 9

[0219]

[0220]

[0221] Of the 14 aspherical surfaces of the optical lens 410 shown in Table 9, all extended aspherical surface types z can be defined using, but are not limited to, the following aspherical formulas:

[0222]

[0223] Where z is the aspherical elevation, r is the normalized radial coordinate of the aspherical surface, r equals the actual radial coordinate of the aspherical surface divided by the normalized radius R, c is the spherical curvature at the vertex of the aspherical surface, K is the quadratic surface constant, and Ax is the aspherical coefficient. It is an aspherical polynomial. Px is a Jacobian polynomial.

[0224] right Figure 14a and Figure 14b The optical lens shown is simulated, and the simulation results are explained in detail below with reference to the attached figures.

[0225] Figure 15a The axial chromatic aberration curve of the third optical lens provided in this application embodiment when in the first imaging mode is shown. Along the direction away from the origin, the values ​​of each scale on the vertical axis are 0.25, 0.50, 0.75, and 1.00, respectively. The figure shows the simulation results of the focusing depth position of the colored light at wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm. It can be seen that the axial chromatic aberration of the optical lens in the first imaging mode is controlled within a very small range.

[0226] Figure 15b The axial chromatic aberration curve of the third optical lens provided in this application embodiment when in the second imaging mode is shown. Along the direction away from the origin, the values ​​of each scale on the vertical axis are 0.25, 0.50, 0.75, and 1.00, respectively. The figure shows the simulation results of the focusing depth positions of colored light at wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm. It can be seen that the axial chromatic aberration of the optical lens in the second imaging mode is controlled within a very small range.

[0227] Figure 16aThe third type of optical lens provided in this application embodiment is shown in the lateral chromatic aberration curve diagram when it is in the first imaging mode. The five solid curves in the figure are colored lights with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively. It can be seen that the lateral chromatic aberration of the optical lens in the first imaging mode is controlled within a very small range.

[0228] Figure 16b The third type of optical lens provided in this application embodiment is shown in the lateral chromatic aberration curve diagram when it is in the second imaging mode. The five solid curves in the figure are colored lights with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively. It can be seen that the lateral chromatic aberration of the optical lens in the second imaging mode is controlled within a very small range.

[0229] Figure 17a The optical distortion curve of the third optical lens provided in the embodiments of this application in the first imaging mode shows the difference between the imaging deformation and the ideal shape. It can be seen that in this mode, the optical distortion can be basically controlled within the range of less than 4%.

[0230] Figure 17b The optical distortion curve of the third optical lens provided in the embodiments of this application in the second imaging mode shows the difference between the imaging deformation and the ideal shape. It can be seen that in this mode, the optical distortion can be basically controlled within the range of less than 4%.

[0231] Please refer to this as well. Figure 18a and Figure 18b As shown, Figure 18a This is a schematic diagram of the structure of the fourth optical lens provided in the embodiments of this application when it is in the first imaging mode. Figure 18b This is a schematic diagram of the structure of the fourth optical lens provided in the embodiments of this application when it is in the second imaging mode. The optical lens 410 includes a variable aperture ST and seven lenses with optical power. The seven lenses are 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. The variable aperture ST is located on the object side of the first lens L1. Additionally, the image filter 440 of the camera module is located on the image side of the seventh lens L7, and the image sensor 430 is located on the image side of the filter 440.

[0232] In this embodiment, the aperture number Fno. of the optical lens 410 satisfies: 1.2≤Fno.≤4.0. In the first imaging mode, the aperture number Fno. of the optical lens 410 is 1.2, and in the second imaging mode, the aperture number Fno. of the optical lens 410 is 4.0.

[0233] The focal length f1 of the first lens L1 and the focal length EFL of the optical lens 410 satisfy: f1 / EFL=1.09;

[0234] The focal length f3 of the third lens L3 and the focal length f4 of the fourth lens L4 satisfy: f3 / f4=-3.61;

[0235] The radius of curvature R3 of the object-side surface of the second lens L2 near the optical axis and the radius of curvature R4 of its image-side surface near the optical axis satisfy: (R3+R4) / (R3-R4)=5.58;

[0236] The total length TTL of the optical lens 410, the half-image height ImgH that the optical lens 410 can form on its imaging plane, and the aperture number Fno. of the optical lens 410 satisfy: 2.33≤TTL×Fno. / ImgH≤6.25;

[0237] The center thickness CT5 of the fifth lens L5, the center thickness CT7 of the seventh lens L7, and the half field of view HFOV of the optical lens 410 satisfy: CT7 / [CT5×tan(HFOV)]=1.04;

[0238] The radius of curvature R12 of the image-side surface of the sixth lens L6 near the optical axis satisfies the following condition with respect to the focal length EFL of the optical lens 410: |EFL / R12|=0.46;

[0239] The radius of curvature R13 of the object-side surface of the seventh lens L7 and the focal length EFL of the optical lens 410 satisfy: |EFL / R13|=2.19;

[0240] The total length TTL of the optical lens 410 and the entrance pupil diameter EPD of the optical lens 410 satisfy: 1.96≤TTL / EPD≤5.22;

[0241] Along the optical axis of the optical lens 410, the distance d1 between the first lens L1 and the second lens L2 satisfies: 0.07≤d1 / dm≤0.21, where dm is the distance between the m-th lens and the (m+1)-th lens, m is a natural number and 2≤m≤6;

[0242] The center thickness CT1 of the first lens L1 satisfies: 1.39≤CT1 / CTn≤3.41, where CTn is the center thickness of the nth lens, n is a natural number and 2≤n≤7.

[0243] For other design parameters of the optical lens 410, please refer to Table 10.

[0244] Table 10

[0245] F value 1.2～4.0 Half field of view (HFOV) 39.8° Total length of the optical lens (TTL, mm) 8 Design wavelength 650nm, 610nm, 555nm, 510nm, 470nm

[0246] In this embodiment, each lens of the optical lens 410 can be an aspherical lens, meaning the optical lens 410 contains a total of 14 aspherical surfaces. Referring also to Tables 11 and 12, 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 coefficients of each lens. In Tables 11 and 12, S1 and S2 represent the object-side surface and image-side surface of the first lens, respectively; S3 and S4 represent the object-side surface and image-side surface of the second lens, respectively; S5 and S6 represent the object-side surface and image-side surface of the third lens, respectively; S7 and S8 represent the object-side surface and image-side surface of the fourth lens, respectively; S9 and S10 represent the object-side surface and image-side surface of the fifth lens, respectively; S11 and S12 represent the object-side surface and image-side surface of the sixth lens, respectively; and S13 and S14 represent the object-side surface and image-side surface of the seventh lens, respectively.

[0247] Table 11

[0248]

[0249] Table 12

[0250]

[0251]

[0252] Of the 14 aspherical surfaces of the optical lens 410 shown in Table 12, all extended aspherical surface types z can be defined using, but are not limited to, the following aspherical formulas:

[0253]

[0254] Where z is the aspherical elevation, r is the normalized radial coordinate of the aspherical surface, r equals the actual radial coordinate of the aspherical surface divided by the normalized radius R, c is the spherical curvature at the vertex of the aspherical surface, K is the quadratic surface constant, and Ax is the aspherical coefficient. It is an aspherical polynomial. Px is a Jacobian polynomial.

[0255] right Figure 18a and Figure 18b The optical lens shown is simulated, and the simulation results are explained in detail below with reference to the attached figures.

[0256] Figure 19aThe axial chromatic aberration curve of the fourth optical lens provided in this application embodiment when in the first imaging mode is shown. Along the direction away from the origin, the values ​​of each scale on the vertical axis are 0.25, 0.50, 0.75, and 1.00, respectively. The figure shows the simulation results of the focusing depth position of the colored light at wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm. It can be seen that the axial chromatic aberration of the optical lens in the first imaging mode is controlled within a very small range.

[0257] Figure 19b The axial chromatic aberration curve of the fourth optical lens provided in this application embodiment when in the second imaging mode is shown. Along the direction away from the origin, the values ​​of each scale on the vertical axis are 0.25, 0.50, 0.75, and 1.00, respectively. The figure shows the simulation results of the focusing depth positions of colored light at wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm. It can be seen that the axial chromatic aberration of the optical lens in the second imaging mode is controlled within a very small range.

[0258] Figure 20a The fourth optical lens provided in this application embodiment is shown in the lateral chromatic aberration curve diagram when it is in the first imaging mode. The five solid curves in the figure are colored lights with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively. It can be seen that the lateral chromatic aberration of the optical lens in the first imaging mode is controlled within a very small range.

[0259] Figure 20b The fourth optical lens provided in this application embodiment is shown in the lateral chromatic aberration curve diagram when it is in the second imaging mode. The five solid curves in the figure are colored lights with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively. It can be seen that the lateral chromatic aberration of the optical lens in the second imaging mode is controlled within a very small range.

[0260] Figure 21a The optical distortion curve of the fourth optical lens provided in the embodiments of this application in the first imaging mode shows the difference between the imaging deformation and the ideal shape. It can be seen that in this mode, the optical distortion can be basically controlled within the range of less than 4%.

[0261] Figure 21b The optical distortion curve of the fourth optical lens provided in the embodiments of this application in the second imaging mode shows the difference between the imaging deformation and the ideal shape. It can be seen that in this mode, the optical distortion can be basically controlled within the range of less than 4%.

[0262] Please refer to this as well. Figure 22a and Figure 22b As shown, Figure 22aThis is a schematic diagram of the structure of the fifth optical lens provided in the embodiments of this application when it is in the first imaging mode. Figure 22b This is a schematic diagram of the structure of the fifth type of camera module optical lens provided in the embodiments of this application when it is in the second imaging mode. The optical lens 410 includes a variable aperture ST and seven lenses with optical power. The seven lenses are 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. The variable aperture is located on the object side of the first lens L1. In addition, the camera module's filter 440 is located on the image side of the seventh lens L7, and the image sensor 430 is located on the image side of the filter 440.

[0263] In this embodiment, the aperture number Fno. of the optical lens 410 satisfies: 1.2≤Fno.≤4.0. In the first imaging mode, the aperture number Fno. of the optical lens 410 is 1.2, and in the second imaging mode, the aperture number Fno. of the optical lens 410 is 4.0.

[0264] The focal length f1 of the first lens L1 and the focal length EFL of the optical lens 410 satisfy: f1 / EFL=1.05;

[0265] The focal length f3 of the third lens L3 and the focal length f4 of the fourth lens L4 satisfy: f3 / f4=-1.55;

[0266] The radius of curvature R3 of the object-side surface of the second lens L2 near the optical axis and the radius of curvature R4 of its image-side surface near the optical axis satisfy: (R3+R4) / (R3-R4)=5.54;

[0267] The total length TTL of the optical lens 410, the half-image height ImgH that the optical lens 410 can form on its imaging plane, and the aperture number Fno. of the optical lens satisfy: 2.07≤TTL×Fno. / ImgH≤5.62;

[0268] The center thickness CT5 of the fifth lens L5, the center thickness CT7 of the seventh lens L7, and the half field of view HFOV of the optical lens 410 satisfy: CT7 / [CT5×tan(HFOV)]=0.75;

[0269] The radius of curvature R12 of the image-side surface of the sixth lens L6 near the optical axis satisfies the following condition with respect to the focal length EFL of the optical lens 410: |EFL / R12|=0.02;

[0270] The radius of curvature R14 of the object-side surface of the seventh lens L7 and the focal length EFL of the optical lens 410 satisfy: |EFL / R13|=0.26;

[0271] The total length TTL of the optical lens 410 and the entrance pupil diameter EPD of the optical lens 410 satisfy: 1.82≤TTL / EPD≤5.08;

[0272] Along the optical axis of the optical lens 410, the distance d1 between the first lens L1 and the second lens L2 satisfies: 0.11≤d1 / dm≤0.66, where dm is the distance between the m-th lens and the (m+1)-th lens, m is a natural number and 2≤m≤6;

[0273] The center thickness CT1 of the first lens L1 satisfies: 1.41≤CT1 / CTn≤3.48, where CTn is the center thickness of the nth lens, n is a natural number and 2≤n≤7.

[0274] For other design parameters of the optical lens 410, please refer to Table 13.

[0275] Table 13

[0276] F value 1.4～4.0 Half field of view (HFOV) 41.8° Total length of the optical lens (TTL, mm) 8 Design wavelength 650nm, 610nm, 555nm, 510nm, 470nm

[0277] In this embodiment, each lens of the optical lens 410 can be an aspherical lens, meaning the optical lens 410 contains a total of 14 aspherical surfaces. Referring also to Tables 14 and 15, 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 coefficients of each lens. In Tables 14 and 15, S1 and S2 represent the object-side and image-side surfaces of the first lens, respectively; S3 and S4 represent the object-side and image-side surfaces of the second lens, respectively; S5 and S6 represent the object-side and image-side surfaces of the third lens, respectively; S7 and S8 represent the object-side and image-side surfaces of the fourth lens, respectively; S9 and S10 represent the object-side and image-side surfaces of the fifth lens, respectively; S11 and S12 represent the object-side and image-side surfaces of the sixth lens, respectively; and S13 and S14 represent the object-side and image-side surfaces of the seventh lens, respectively.

[0278] Table 14

[0279]

[0280] Table 15

[0281]

[0282]

[0283] Of the 14 aspherical surfaces of the optical lens 410 shown in Table 15, all extended aspherical surface types z can be defined using, but are not limited to, the following aspherical formulas:

[0284]

[0285] Where z is the aspherical elevation, r is the normalized radial coordinate of the aspherical surface, r equals the actual radial coordinate of the aspherical surface divided by the normalized radius R, c is the spherical curvature at the vertex of the aspherical surface, K is the quadratic surface constant, and Ax is the aspherical coefficient. It is an aspherical polynomial. Px is a Jacobian polynomial.

[0286] right Figure 22a and Figure 22b The optical lens shown is simulated, and the simulation results are explained in detail below with reference to the attached figures.

[0287] Figure 23a The axial chromatic aberration curve of the fifth optical lens provided in this application embodiment when in the first imaging mode is shown. Along the direction away from the origin, the values ​​of each scale on the vertical axis are 0.25, 0.50, 0.75, and 1.00, respectively. The figure shows the simulation results of the focusing depth position of the colored light at wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm. It can be seen that the axial chromatic aberration of the optical lens in the first imaging mode is controlled within a very small range.

[0288] Figure 23b The axial chromatic aberration curve of the fifth optical lens provided in this application embodiment when in the second imaging mode is shown. Along the direction away from the origin, the values ​​of each scale on the vertical axis are 0.25, 0.50, 0.75, and 1.00, respectively. The figure shows the simulation results of the focusing depth positions of colored light at wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively. It can be seen that the axial chromatic aberration of the optical lens in the second imaging mode is controlled within a very small range.

[0289] Figure 24a The fifth optical lens provided in this application embodiment is shown in the lateral chromatic aberration curve diagram when it is in the first imaging mode. The five solid curves in the figure are colored lights with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively. It can be seen that the lateral chromatic aberration of the optical lens in the first imaging mode is controlled within a very small range.

[0290] Figure 24b The fifth optical lens provided in this application embodiment is shown in the lateral chromatic aberration curve diagram when it is in the second imaging mode. The five solid curves in the figure are colored lights with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively. It can be seen that the lateral chromatic aberration of the optical lens in the second imaging mode is controlled within a very small range.

[0291] Figure 25aThe optical distortion curve of the fifth optical lens provided in the embodiments of this application in the first imaging mode shows the difference between the imaging deformation and the ideal shape. It can be seen that the optical distortion can be basically controlled within the range of less than 2.5% in this mode.

[0292] Figure 25b The optical distortion curve of the fifth optical lens provided in the embodiments of this application in the second imaging mode shows the difference between the imaging deformation and the ideal shape. It can be seen that in this mode, the optical distortion can be basically controlled within the range of less than 2.5%.

[0293] Please refer to this as well. Figure 26a and Figure 26b As shown, Figure 26a This is a schematic diagram of the structure of the sixth optical lens provided in the embodiments of this application when it is in the first imaging mode. Figure 26b This is a schematic diagram of the sixth optical lens provided in the embodiments of this application when it is in the second imaging mode. The optical lens 410 includes a variable aperture ST and seven lenses with optical power. The seven lenses are 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. The variable aperture ST is located on the object side of the first lens L1. Additionally, the image filter 440 of the camera module is located on the image side of the seventh lens, and the image sensor 430 is located on the image side of the filter 440.

[0294] In this embodiment, the aperture number Fno. of the optical lens 410 satisfies: 1.2≤Fno.≤8.0. In the first imaging mode, the aperture number Fno. of the optical lens 410 is 1.2, and in the second imaging mode, the aperture number Fno. of the optical lens 410 is 8.0.

[0295] The focal length f1 of the first lens L1 and the focal length EFL of the optical lens 410 satisfy: f1 / EFL=1.03;

[0296] The focal length f3 of the third lens L3 and the focal length f4 of the fourth lens L4 satisfy: f3 / f4=-2.35;

[0297] The radius of curvature R3 of the object-side surface of the second lens L2 near the optical axis and the radius of curvature R4 of its image-side surface near the optical axis satisfy: (R3+R4) / (R3-R4)=4.93;

[0298] The total length TTL of the optical lens 410, the half-image height ImgH that the optical lens 410 can form on its imaging plane, and the aperture number Fno. of the optical lens 410 satisfy: 1.87≤TTL×Fno. / ImgH≤5.74;

[0299] The center thickness CT5 of the fifth lens L5, the center thickness CT7 of the seventh lens L7, and the half field of view HFOV of the optical lens 410 satisfy: CT7 / [CT5×tan(HFOV)]=0.46;

[0300] The radius of curvature R12 of the image-side surface of the sixth lens L6 near the optical axis satisfies the following condition with respect to the focal length EFL of the optical lens 410: |EFL / R12|=0.11;

[0301] The radius of curvature R13 of the object-side surface of the seventh lens L7 and the focal length EFL of the optical lens 410 satisfy: |EFL / R13|=2.10;

[0302] The total length TTL of the optical lens 410 and the entrance pupil diameter EPD of the optical lens 410 satisfy: 1.74≤TTL / EPD≤5.25;

[0303] Along the optical axis of the optical lens 410, the distance d1 between the first lens L1 and the second lens L2 satisfies: 0.05≤d1 / dm≤0.16, where dm is the distance between the m-th lens and the (m+1)-th lens, m is a natural number and 2≤m≤6;

[0304] The center thickness CT1 of the first lens L1 satisfies: 1.6≤CT1 / CTn≤4.89, where CTn is the center thickness of the nth lens, n is a natural number and 2≤n≤7.

[0305] For other design parameters of the optical lens 410, please refer to Table 16.

[0306] Table 16

[0307] F value 1.2～8.0 Half field of view (HFOV) 41.2° Total length of the optical lens (TTL, mm) 7.4 Design wavelength 650nm, 610nm, 555nm, 510nm, 470nm

[0308] In this embodiment, each lens of the optical lens 410 can be an aspherical lens, meaning the optical lens 410 contains a total of 14 aspherical surfaces. Referring also to Tables 17 and 18, 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 coefficients of each lens. In Tables 17 and 18, S1 and S2 represent the object-side and image-side surfaces of the first lens, respectively; S3 and S4 represent the object-side and image-side surfaces of the second lens, respectively; S5 and S6 represent the object-side and image-side surfaces of the third lens, respectively; S7 and S8 represent the object-side and image-side surfaces of the fourth lens, respectively; S9 and S10 represent the object-side and image-side surfaces of the fifth lens, respectively; S11 and S12 represent the object-side and image-side surfaces of the sixth lens, respectively; and S13 and S14 represent the object-side and image-side surfaces of the seventh lens, respectively.

[0309] Table 17

[0310]

[0311]

[0312] Table 18

[0313]

[0314]

[0315] Of the 14 aspherical surfaces of the optical lens 410 shown in Table 18, all extended aspherical surface types z can be defined using, but are not limited to, the following aspherical formulas:

[0316]

[0317] Where z is the aspherical elevation, r is the normalized radial coordinate of the aspherical surface, r equals the actual radial coordinate of the aspherical surface divided by the normalized radius R, c is the spherical curvature at the vertex of the aspherical surface, K is the quadratic surface constant, and Ax is the aspherical coefficient. It is an aspherical polynomial. Px is a Jacobian polynomial.

[0318] right Figure 26a and Figure 26b The optical lens shown is simulated, and the simulation results are explained in detail below with reference to the attached figures.

[0319] Figure 27a The axial chromatic aberration curve of the sixth optical lens provided in this application embodiment when in the first imaging mode is shown. Along the direction away from the origin, the values ​​of each scale on the vertical axis are 0.25, 0.50, 0.75, and 1.00, respectively. The figure shows the simulation results of the focusing depth position of the colored light at wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm. It can be seen that the axial chromatic aberration of the optical lens in the first imaging mode is controlled within a very small range.

[0320] Figure 27b The axial chromatic aberration curve of the sixth optical lens provided in this application embodiment when in the second imaging mode is shown. Along the direction away from the origin, the values ​​of each scale on the vertical axis are 0.25, 0.50, 0.75, and 1.00, respectively. The figure shows the simulation results of the focusing depth positions of colored light at wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm. It can be seen that the axial chromatic aberration of the optical lens in the second imaging mode is controlled within a very small range.

[0321] Figure 28aThe sixth optical lens provided in this application embodiment is shown in the lateral chromatic aberration curve diagram when it is in the first imaging mode. The five solid curves in the figure are colored lights with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively. It can be seen that the lateral chromatic aberration of the optical lens in the first imaging mode is controlled within a very small range.

[0322] Figure 28b The sixth optical lens provided in this application embodiment is shown in the lateral chromatic aberration curve diagram when it is in the second imaging mode. The five solid curves in the figure are colored lights with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm, respectively. It can be seen that the lateral chromatic aberration of the optical lens in the second imaging mode is controlled within a very small range.

[0323] Figure 29a The optical distortion curve of the sixth optical lens provided in the embodiments of this application in the first imaging mode shows the difference between the imaging deformation and the ideal shape. It can be seen that in this mode, the optical distortion can be basically controlled within the range of less than 5%.

[0324] Figure 29b The optical distortion curve of the sixth optical lens provided in the embodiments of this application in the second imaging mode shows the difference between the imaging deformation and the ideal shape. It can be seen that in this mode, the optical distortion can be basically controlled within the range of less than 5%.

[0325] As can be seen from the structure and simulation effect of the first, second, third, fourth, fifth and sixth optical lenses described above, the optical lenses provided in this application embodiment can achieve good imaging effects in two different imaging modes.

[0326] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An optical lens, characterized in that, The optical lens comprises a variable aperture, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged from the object side to the image side. The optical lens has seven lenses with optical power, wherein: The light transmission diameter of the variable aperture is adjustable; The first lens has positive optical power, and the object-side surface of the first lens is convex near the optical axis, while the image-side surface is concave near the optical axis. The second lens has negative optical power. The object-side surface of the second lens is convex near the optical axis, and the image-side surface is concave near the optical axis. The third lens has negative optical power, and the object-side surface of the third lens is concave near the optical axis; The fourth lens has positive optical power; The sixth lens has positive optical power, and the radius of curvature R12 of the image-side surface of the sixth lens near the optical axis satisfies the following condition with respect to the focal length EFL of the optical lens: 0≤|EFL / R12|≤0.46; The seventh lens has negative optical power, and the object-side surface of the seventh lens is a curved surface. The focal length f1 of the first lens and the focal length EFL of the optical lens satisfy: 0≤f1 / EFL≤1.1; the focal length f3 of the third lens and the focal length f4 of the fourth lens satisfy: -4≤f3 / f4≤-1.

3.

2. The optical lens as described in claim 1, characterized in that, The radius of curvature R3 of the object-side surface of the second lens near the optical axis and the radius of curvature R4 of the image-side surface of the second lens near the optical axis satisfy: 1.8≤(R3+R4) / (R3-R4)≤6.

3.

3. The optical lens as described in claim 1, characterized in that, The total length TTL of the optical lens, the aperture number F of the optical lens, and the half-image height ImgH of the optical lens satisfy: TTL×F / ImgH≥1.

8.

4. The optical lens as described in any one of claims 1 to 3, characterized in that, The center thickness CT5 of the fifth lens, the center thickness CT7 of the seventh lens, and the half field of view HFOV of the optical lens satisfy: 0≤CT7 / [CT5×tan(HFOV)]≤1.

1.

5. The optical lens as described in any one of claims 1 to 3, characterized in that, The aperture number F of the optical lens satisfies: 1.2≤F≤8.

0.

6. The optical lens according to any one of claims 1 to 3, characterized in that, The radius of curvature R13 of the object-side surface of the seventh lens and the focal length EFL of the optical lens satisfy: 0≤|EFL / R13|≤2.

2.

7. The optical lens as described in any one of claims 1 to 3, characterized in that, The total length (TTL) of the optical lens and the entrance pupil diameter (EPD) of the optical lens satisfy the following condition: 1.5 ≤ TTL / EPD ≤ 10.

8. The optical lens as described in any one of claims 1 to 3, characterized in that, Along the optical axis of the optical lens, the distance d1 between the first lens and the second lens satisfies: d1 / dm≤1, where dm is the distance between the m-th lens and the (m+1)-th lens, and m is a natural number and 2≤m≤6.

9. The optical lens as described in any one of claims 1 to 3, characterized in that, The center thickness CT1 of the first lens satisfies: CT1 / CTn≥1, where CTn is the center thickness of the nth lens, n is a natural number and 2≤n≤7.

10. A camera module, characterized in that, The system includes an image sensor and an optical lens as described in any one of claims 1 to 9, wherein the image sensor is disposed on the imaging surface of the optical lens; the image sensor is used to convert the light signal transmitted by the optical lens into an image signal.

11. An electronic device, characterized in that, It includes a housing and a camera module as described in claim 10, wherein the camera module is fixed to the housing.

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