Optical lens and electronic device

Abstract

The application provides an optical lens and an electronic device. The optical lens comprises, in sequence from a first side to a second side: a first lens with positive refractive power, the first side of the first lens being a convex surface; a second lens with refractive power, the first side of the second lens being a concave surface and the second side being a convex surface; a third lens with positive refractive power, the first side of the third lens being a convex surface and the second side being a convex surface; a fourth lens with negative refractive power, the first side of the fourth lens being a concave surface and the second side being a concave surface; a fifth lens with positive refractive power, the first side of the fifth lens being a convex surface and the second side being a convex surface; and a sixth lens with positive refractive power, the first side of the sixth lens being a convex surface and the second side being a concave surface. The application solves the problem that the optical lens in the prior art cannot simultaneously have a short back focal length, high light flux and a large field of view.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical imaging devices, in particular to an optical lens and an electronic device. BACKGROUND

[0002] In recent years, with the continuous development and upgrading of intelligent headlamps, optical lenses have been increasingly widely applied in million-pixel headlamps, such as projection lenses. At present, with the increasing requirements of the market for projection lenses, the development is gradually towards higher luminous flux, smaller size and larger field of view.

[0003] Unlike ordinary projection lenses, the projection lens of the intelligent headlamp has more special requirements in terms of assisting driving and safety improvement. However, the current optical lenses have various problems, for example, although the current optical lenses can achieve a million-pixel definition, the chromatic aberration, astigmatism, distortion and other aberration problems are relatively serious, and the imaging quality is difficult to guarantee. On the other hand, the projection field angle of the current optical lens is limited and cannot meet the larger projection range. At the same time, it cannot guarantee a high brightness. Or, on the basis of miniaturization, the aperture of the current optical lens cannot meet the actual installation and use.

[0004] That is, the optical lens in the prior art has the problem that short back focal length, high luminous flux and large field of view are difficult to simultaneously consider. SUMMARY

[0005] The main purpose of the present application is to provide an optical lens and an electronic device to solve the problem that the optical lens in the prior art has the problem that short back focal length, high luminous flux and large field of view are difficult to simultaneously consider.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present application, an optical lens is provided, which comprises, in order from a first side to a second side: a first lens having positive refractive power, the first side of the first lens being a convex surface; a second lens having refractive power, the first side of the second lens being a concave surface and the second side being a convex surface; a third lens having positive refractive power, the first side of the third lens being a convex surface and the second side being a convex surface; a fourth lens having negative refractive power, the first side of the fourth lens being a concave surface and the second side being a concave surface; a fifth lens having positive refractive power, the first side of the fifth lens being a convex surface and the second side being a convex surface; and a sixth lens having positive refractive power, the first side of the sixth lens being a convex surface and the second side being a concave surface.

[0007] Further, the second side of the first lens is a convex surface.

[0008] Further, the second side of the first lens is a plane.

[0009] Further, the second side of the first lens is a concave surface.

[0010] Further, the second lens has positive refractive power.

[0011] Further, the second lens has negative refractive power.

[0012] Further, the optical lens further comprises a diaphragm, the diaphragm being located between the second lens and the third lens.

[0013] Further, the third lens and the fourth lens are cemented to form a double cemented lens.

[0014] Further, the optical total length of the optical lens, i.e. the center distance TTL from the first side of the first lens to the imaging surface, and the total focal length F of the optical lens satisfy: TTL / F≤5.8.

[0015] Further, the optical total length of the optical lens, i.e. the center distance TTL from the first side of the first lens to the imaging surface, and the total focal length F of the optical lens satisfy: TTL / F≤4.8.

[0016] Further, the optical total length of the optical lens, i.e. the center distance TTL from the first side of the first lens to the imaging surface, the actual image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: TTL / H / FOV≤1.

[0017] Further, the optical total length of the optical lens, i.e. the center distance TTL from the first side of the first lens to the imaging surface, the actual image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: TTL / H / FOV≤0.5.

[0018] Further, the optical total length of the optical lens, i.e. the center distance TTL from the first side of the first lens to the imaging surface, the actual image height H corresponding to the maximum field of view of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy: TTL / H / θ≥3.

[0019] Further, the optical total length of the optical lens, i.e. the center distance TTL from the first side of the first lens to the imaging surface, the actual image height H corresponding to the maximum field of view of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy: TTL / H / θ≥5.

[0020] Further, the optical total length of the optical lens, i.e. the center distance TTL from the first side of the first lens to the imaging surface, and the maximum diameter DMAX in the lenses of the optical lens satisfy: TTL / DMAX≤5.

[0021] Further, an optical total track length of the optical lens, i.e. a distance TTL from a first side of the first lens to a center of the imaging surface, and a maximum diameter DMAX of the lenses of the optical lens satisfy: TTL / DMAX≤2.5.

[0022] Further, an entire group focal length F of the optical lens and an actual image height H corresponding to a maximum field angle of the optical lens satisfy: F / H≥0.5.

[0023] Further, an entire group focal length F of the optical lens and an actual image height H corresponding to a maximum field angle of the optical lens satisfy: F / H≥1.

[0024] Further, an entire group focal length F of the optical lens and an entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2.

[0025] Further, an entire group focal length F of the optical lens and an entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤0.9.

[0026] Further, an effective diameter DST of the diaphragm and an entire group focal length F of the optical lens satisfy: DST / F≤3.

[0027] Further, an effective diameter DST of the diaphragm and an entire group focal length F of the optical lens satisfy: DST / F≤2.2.

[0028] Further, an actual image height H corresponding to a maximum field angle of the optical lens, an entire group focal length F of the optical lens and an arc value θ of the maximum field angle of the optical lens satisfy: (H / 2) / (F*tan(θ / 2))≥0.001.

[0029] Further, an actual image height H corresponding to a maximum field angle of the optical lens, an entire group focal length F of the optical lens and an arc value θ of the maximum field angle of the optical lens satisfy: (H / 2) / (F*tan(θ / 2))≥0.5.

[0030] Further, an optical back focal length of the optical lens, i.e. a distance BFL from a second side center of the last lens of the optical lens to the center of the imaging surface, and an optical total track length of the optical lens, i.e. the distance TTL from the first side of the first lens to the center of the imaging surface, satisfy: BFL / TTL≤0.091.

[0031] Further, an optical back focal length of the optical lens, i.e. a distance BFL from a second side center of the last lens of the optical lens to the center of the imaging surface, and an optical total track length of the optical lens, i.e. the distance TTL from the first side of the first lens to the center of the imaging surface, satisfy: BFL / TTL≤0.08.

[0032] Further, a focal length F6 of the sixth lens and an overall focal length F of the optical lens satisfy: F6 / F≤3.4.

[0033] Further, a focal length F6 of the sixth lens and an overall focal length F of the optical lens satisfy: 0.181≤F6 / F≤3.4.

[0034] Further, a maximum field angle FOV of the optical lens, an overall focal length F of the optical lens, and an actual image height H corresponding to the maximum field angle FOV of the optical lens satisfy: 69≥(FOV*F) / H≥60.1.

[0035] Further, a maximum field angle FOV of the optical lens, an overall focal length F of the optical lens, and an actual image height H corresponding to the maximum field angle FOV of the optical lens satisfy: 68.2≥(FOV*F) / H≥60.8.

[0036] Further, a curvature radius R3 of the first side surface of the second lens, a curvature radius R4 of the second side surface of the second lens, and a central thickness d3 of the second lens satisfy: 0.87≤R3 / (R4+d3)≤1.33.

[0037] Further, a curvature radius R3 of the first side surface of the second lens, a curvature radius R4 of the second side surface of the second lens, and a central thickness d3 of the second lens satisfy: 0.90≤R3 / (R4+d3)≤1.33.

[0038] Further, a focal length F1 of the first lens and an overall focal length F of the optical lens satisfy: 0.5≤F1 / F.

[0039] Further, a focal length F1 of the first lens and an overall focal length F of the optical lens satisfy: 1≤F1 / F.

[0040] Further, an overall focal length F of the optical lens and a focal length F2 of the second lens satisfy: -0.5≤F / F2.

[0041] Further, an overall focal length F of the optical lens and a focal length F2 of the second lens satisfy: -0.2≤F / F2.

[0042] Further, a curvature radius R3 of the first side surface of the second lens and a curvature radius R4 of the second side surface of the second lens satisfy: R3 / R4≤3.

[0043] Further, a curvature radius R3 of the first side surface of the second lens and a curvature radius R4 of the second side surface of the second lens satisfy: R3 / R4≤2.

[0044] Further, a ratio between the curvature radius R5 of the first side surface of the third lens and the curvature radius R6 of the second side surface of the third lens satisfies: R5 / R6≤-0.01.

[0045] Further, a ratio between the curvature radius R5 of the first side surface of the third lens and the curvature radius R6 of the second side surface of the third lens satisfies: R5 / R6≤-0.08.

[0046] Further, a ratio between the curvature radius R3 of the first side surface of the second lens, the curvature radius R4 of the second side surface of the second lens and the air interval d2 between the first lens and the second lens satisfies: R3 / (R4+d2)≤2.

[0047] Further, a ratio between the curvature radius R3 of the first side surface of the second lens, the curvature radius R4 of the second side surface of the second lens and the air interval d2 between the first lens and the second lens satisfies: R3 / (R4+d2)≤1.5.

[0048] Further, a ratio between the air interval d10 between the fifth lens and the sixth lens and the total optical length of the optical lens, i.e. the center distance TTL from the first side surface of the first lens to the imaging surface satisfies: d10 / TTL≤2.

[0049] Further, a ratio between the air interval d10 between the fifth lens and the sixth lens and the total optical length of the optical lens, i.e. the center distance TTL from the first side surface of the first lens to the imaging surface satisfies: d10 / TTL≤1.5.

[0050] Further, a ratio between the sagittal height SAG7 of the first side surface of the fourth lens and the clear aperture D7 of the first side surface of the fourth lens satisfies: arctan(SAG7 / D7)≤-0.01.

[0051] Further, a ratio between the sagittal height SAG7 of the first side surface of the fourth lens and the clear aperture D7 of the first side surface of the fourth lens satisfies: arctan(SAG7 / D7)≤-0.025.

[0052] Further, a ratio between the lens group length of the optical lens, i.e. the center distance TL from the first side center of the first lens of the optical lens to the second side center of the last lens of the optical lens and the center thickness d5 of the third lens satisfies: TL / d5≤-1.

[0053] Further, a ratio between the lens group length of the optical lens, i.e. the center distance TL from the first side center of the first lens of the optical lens to the second side center of the last lens of the optical lens and the center thickness d5 of the third lens satisfies: TL / d5≤-10.

[0054] Further, a curvature radius R7 of the first side surface of the fourth lens and a curvature radius R8 of the second side surface of the fourth lens satisfy: |R7 / R8|≤1.5.

[0055] Further, a curvature radius R7 of the first side surface of the fourth lens and a curvature radius R8 of the second side surface of the fourth lens satisfy: |R7 / R8|≤1.

[0056] Further, a curvature radius R3 of the first side surface of the second lens and a curvature radius R4 of the second side surface of the second lens satisfy: 1 / (1 / R3-1 / R4)≤-15.

[0057] Further, a curvature radius R3 of the first side surface of the second lens and a curvature radius R4 of the second side surface of the second lens satisfy: 1 / (1 / R3-1 / R4)≤-30.

[0058] According to another aspect of the present application, there is provided an optical lens comprising, in order from a first side to a second side: a first lens having a positive refractive power; a second lens having a refractive power; a third lens having a positive refractive power; a fourth lens having a negative refractive power; a fifth lens having a positive refractive power; a sixth lens having a positive refractive power; a curvature radius R3 of a first side surface of the second lens and a curvature radius R4 of a second side surface of the second lens satisfy: R3 / R4≤3.

[0059] Further, the first side surface of the first lens is convex, and the second side surface is convex.

[0060] Further, the first side surface of the first lens is convex, and the second side surface is planar.

[0061] Further, the first side surface of the first lens is convex, and the second side surface is concave.

[0062] Further, the second lens has a positive refractive power, the first side surface of the second lens is concave, and the second side surface is convex.

[0063] Further, the second lens has a negative refractive power, the first side surface of the second lens is concave, and the second side surface is convex.

[0064] Further, the first side surface of the third lens is convex, and the second side surface is convex.

[0065] Further, the first side surface of the fourth lens is concave, and the second side surface is concave.

[0066] Further, the first side surface of the fifth lens is convex, and the second side surface is convex.

[0067] Further, the first side surface of the sixth lens is convex, and the second side surface is concave.

[0068] Further, the optical lens further comprises a diaphragm, the diaphragm is located between the second lens and the third lens.

[0069] Further, the third lens and the fourth lens are cemented to form a double cemented lens.

[0070] Further, a radius of curvature R3 of the first side surface of the second lens and a radius of curvature R4 of the second side surface of the second lens satisfy: R3 / R4≤2.

[0071] Further, an overall optical length of the optical lens, i.e. a center distance TTL from the first side surface of the first lens to the imaging surface and an overall focal length F of the optical lens satisfy: TTL / F≤5.8.

[0072] Further, an overall optical length of the optical lens, i.e. a center distance TTL from the first side surface of the first lens to the imaging surface and an overall focal length F of the optical lens satisfy: TTL / F≤4.8.

[0073] Further, an overall optical length of the optical lens, i.e. a center distance TTL from the first side surface of the first lens to the imaging surface, an actual image height H corresponding to a maximum field of view of the optical lens and the maximum field of view FOV of the optical lens satisfy: TTL / H / FOV≤1.

[0074] Further, an overall optical length of the optical lens, i.e. a center distance TTL from the first side surface of the first lens to the imaging surface, an actual image height H corresponding to a maximum field of view of the optical lens and the maximum field of view FOV of the optical lens satisfy: TTL / H / FOV≤0.5.

[0075] Further, an overall optical length of the optical lens, i.e. a center distance TTL from the first side surface of the first lens to the imaging surface, an actual image height H corresponding to a maximum field of view of the optical lens and an arc value θ of the maximum field of view of the optical lens satisfy: TTL / H / θ≥3.

[0076] Further, an overall optical length of the optical lens, i.e. a center distance TTL from the first side surface of the first lens to the imaging surface, an actual image height H corresponding to a maximum field of view of the optical lens and an arc value θ of the maximum field of view of the optical lens satisfy: TTL / H / θ≥5.

[0077] Further, an overall optical length of the optical lens, i.e. a center distance TTL from the first side surface of the first lens to the imaging surface and a maximum diameter DMAX of the lenses of the optical lens satisfy: TTL / DMAX≤5.

[0078] Further, an overall optical length of the optical lens, i.e. a center distance TTL from the first side surface of the first lens to the imaging surface and a maximum diameter DMAX of the lenses of the optical lens satisfy: TTL / DMAX≤2.5.

[0079] Further, an overall focal length F of the optical lens and an actual image height H corresponding to a maximum field angle of the optical lens satisfy: F / H≥0.5.

[0080] Further, an overall focal length F of the optical lens and an actual image height H corresponding to a maximum field angle of the optical lens satisfy: F / H≥1.

[0081] Further, an overall focal length F of the optical lens and an entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2.

[0082] Further, an overall focal length F of the optical lens and an entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤0.9.

[0083] Further, an effective aperture DST of the diaphragm and an overall focal length F of the optical lens satisfy: DST / F≤3.

[0084] Further, an effective aperture DST of the diaphragm and an overall focal length F of the optical lens satisfy: DST / F≤2.2.

[0085] Further, an actual image height H corresponding to a maximum field angle of the optical lens, an overall focal length F of the optical lens and an arc value θ of the maximum field angle of the optical lens satisfy: (H / 2) / (F*tan(θ / 2))≥0.001.

[0086] Further, an actual image height H corresponding to a maximum field angle of the optical lens, an overall focal length F of the optical lens and an arc value θ of the maximum field angle of the optical lens satisfy: (H / 2) / (F*tan(θ / 2))≥0.5.

[0087] Further, an optical back focal length BFL of the optical lens, i.e. a distance from a center of a second side of a last lens of the optical lens to a center of an imaging surface, and an optical total length TTL of the optical lens, i.e. a distance from a first side of a first lens to the center of the imaging surface, satisfy: BFL / TTL≤0.091.

[0088] Further, an optical back focal length BFL of the optical lens, i.e. a distance from a center of a second side of a last lens of the optical lens to a center of an imaging surface, and an optical total length TTL of the optical lens, i.e. a distance from a first side of a first lens to the center of the imaging surface, satisfy: BFL / TTL≤0.08.

[0089] Further, a focal length F6 of the sixth lens and an overall focal length F of the optical lens satisfy: F6 / F≤3.4.

[0090] Further, a focal length F6 of the sixth lens and an overall focal length F of the optical lens satisfy: 0.181≤F6 / F≤3.4.

[0091] Further, the maximum field of view FOV of the optical lens, the total focal length F of the optical lens, and the actual image height H corresponding to the maximum field of view of the optical lens satisfy: 69≥(FOV*F) / H≥60.1.

[0092] Further, the maximum field of view FOV of the optical lens, the total focal length F of the optical lens, and the actual image height H corresponding to the maximum field of view of the optical lens satisfy: 68.2≥(FOV*F) / H≥60.8.

[0093] Further, the radius of curvature R3 of the first side surface of the second lens, the radius of curvature R4 of the second side surface of the second lens, and the central thickness d3 of the second lens satisfy: 0.87≤R3 / (R4+d3)≤1.33.

[0094] Further, the radius of curvature R3 of the first side surface of the second lens, the radius of curvature R4 of the second side surface of the second lens, and the central thickness d3 of the second lens satisfy: 0.90≤R3 / (R4+d3)≤1.33.

[0095] Further, the focal length F1 of the first lens and the total focal length F of the optical lens satisfy: 0.5≤F1 / F.

[0096] Further, the focal length F1 of the first lens and the total focal length F of the optical lens satisfy: 1≤F1 / F.

[0097] Further, the total focal length F of the optical lens and the focal length F2 of the second lens satisfy: -0.5≤F / F2.

[0098] Further, the total focal length F of the optical lens and the focal length F2 of the second lens satisfy: -0.2≤F / F2.

[0099] Further, the radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy: R5 / R6≤-0.01.

[0100] Further, the radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy: R5 / R6≤-0.08.

[0101] Further, the radius of curvature R3 of the first side surface of the second lens, the radius of curvature R4 of the second side surface of the second lens, and the air gap d2 between the first lens and the second lens satisfy: R3 / (R4+d2)≤2.

[0102] Further, a radius of curvature R3 of the first side surface of the second lens, a radius of curvature R4 of the second side surface of the second lens, and an air gap d2 between the first lens and the second lens satisfy: R3 / (R4+d2)≤1.5.

[0103] Further, an air gap d10 between the fifth lens and the sixth lens and an overall optical length of the optical lens, i.e., a center distance TTL from the first side surface of the first lens to an imaging surface satisfy: d10 / TTL≤2.

[0104] Further, an air gap d10 between the fifth lens and the sixth lens and an overall optical length of the optical lens, i.e., a center distance TTL from the first side surface of the first lens to an imaging surface satisfy: d10 / TTL≤1.5.

[0105] Further, a sagittal height SAG7 of the first side surface of the fourth lens and an entrance pupil diameter D7 of the first side surface of the fourth lens satisfy: arctan(SAG7 / D7)≤-0.01.

[0106] Further, a sagittal height SAG7 of the first side surface of the fourth lens and an entrance pupil diameter D7 of the first side surface of the fourth lens satisfy: arctan(SAG7 / D7)≤-0.025.

[0107] Further, a lens group length of the optical lens, i.e., a center distance TL from a first side center of the first lens of the optical lens to a second side center of the last lens of the optical lens and a center thickness d5 of the third lens satisfy: TL / d5≤-1.

[0108] Further, a lens group length of the optical lens, i.e., a center distance TL from a first side center of the first lens of the optical lens to a second side center of the last lens of the optical lens and a center thickness d5 of the third lens satisfy: TL / d5≤-10.

[0109] Further, a radius of curvature R7 of the first side surface of the fourth lens and a radius of curvature R8 of the second side surface of the fourth lens satisfy: |R7 / R8|≤1.5.

[0110] Further, a radius of curvature R7 of the first side surface of the fourth lens and a radius of curvature R8 of the second side surface of the fourth lens satisfy: |R7 / R8|≤1.

[0111] Further, a radius of curvature R3 of the first side surface of the second lens and a radius of curvature R4 of the second side surface of the second lens satisfy: 1 / (1 / R3-1 / R4)≤-15.

[0112] Further, a radius of curvature R3 of the first side surface of the second lens and a radius of curvature R4 of the second side surface of the second lens satisfy: 1 / (1 / R3-1 / R4)≤-30.

[0113] According to another aspect of the present application, an electronic device is provided, which comprises the optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0114] According to the technical scheme of the present application, the optical lens sequentially comprises, from the first side to the second side, a first lens with positive refractive power, a second lens with refractive power, a third lens with positive refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, and a sixth lens with positive refractive power. The first side surface of the first lens is a convex surface. The first side surface of the second lens is a concave surface, and the second side surface is a convex surface. The first side surface of the third lens is a convex surface, and the second side surface is a convex surface. The first side surface of the fourth lens is a concave surface, and the second side surface is a concave surface. The first side surface of the fifth lens is a convex surface, and the second side surface is a convex surface. The first side surface of the sixth lens is a convex surface, and the second side surface is a concave surface.

[0115] The first lens has positive refractive power, converges light rays, adjusts central light rays and edge position light rays, improves system illumination, and smoothly transitions the light rays to the rear, reducing system sensitivity. The first side surface of the first lens is a convex surface, which is beneficial for appearance and easy cleaning, and is not prone to dust accumulation.

[0116] The refractive power of the second lens can be positive or negative. The first side surface of the second lens is a concave surface, and the second side surface is a convex surface. When the second lens has positive refractive power, high refractive index material is preferably used, which is beneficial for deflecting light rays and achieving a larger field of view. At the same time, the focal length of the second lens is large, which is beneficial for the smooth transition of light rays to the rear, reducing the sensitivity of the lens. The first side surface of the second lens is a concave surface, which is beneficial for converging the light rays at the front end, making the light rays in each field of view near parallel to the optical axis at the second lens, deflecting the light rays less, and reducing energy loss. When the second lens has negative refractive power, the light rays are further diverged, the deflection angle of the light rays is adjusted, chromatic aberration is reduced, the diverged light rays smoothly enter the rear, and the light rays are smoothly transitioned. The first side surface of the second lens is a concave surface, which collects and converges the edge field of view light rays in cooperation with the first lens. The second side surface of the second lens is a convex surface, which adjusts the divergence angle of the light rays, is beneficial for the smooth transition of the light rays, and reduces the sensitivity of the rear optical system. The concentric circles of the second lens make the peripheral light rays and the central light rays have a difference in optical path, the central light rays are diverged, enter the rear optical system, the front aperture of the optical lens is reduced, the volume is reduced, which is beneficial for miniaturization and cost reduction.

[0117] The third lens has positive focal power, can further shrink the light ray angle of view with the diaphragm, the first side surface of the third lens is a convex surface, and the second side surface is a convex surface. The first side surface and the second side surface of the third lens are provided with double convexity, so that the rear optical system can collect the light rays of the edge field of view, reduce the system aberration, and improve the system illumination.

[0118] The fourth lens has negative focal power, can disperse the light rays, adjust the angle of the light rays, and smoothly transition the peripheral light rays, so as to reduce the sensitivity of the lens; the first side surface of the fourth lens is a concave surface, the second side surface is a concave surface, the fourth lens is double concave and relatively smooth, the emitted light rays of the front lens can be smoothly transitioned, the degree of deflection is reduced, the optical path difference of the light rays of the edge field of view and the central field of view is rapidly increased, the aberration of the edge field of view is corrected, and the image quality is improved.

[0119] The fifth lens has positive focal power, has a converging effect on the light rays, can effectively converge the central light rays and the edge light rays of each field of view, and increase the system illumination; the first side surface of the fifth lens is a convex surface, the light rays are converged, and the system illumination is increased, and the second side surface of the fifth lens is a convex surface, which is beneficial to the lengthening of the back focus, facilitates the assembly of the module and the adjustment of the focal length.

[0120] The sixth lens has positive focal power, and the lens shape is smooth, so that the light rays smoothly enter the rear, the light ray trend is smoothly transitioned, the astigmatism and the field curvature of the imaging are improved, and the resolving power of the optical system is improved; the first side surface of the sixth lens is a convex surface, and the second side surface is a concave surface, so that the light rays passing through the sixth lens to the imaging surface have a larger optical path, which is beneficial to realizing small CRA.

[0121] The application adopts six lenses, optimizes the focal power and the surface type of each lens, so that the optical lens has at least one beneficial effect of short back focus, high light flux and large field of view. BRIEF DESCRIPTION OF DRAWINGS

[0122] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the application, and together with the specification explain the application, and do not limit the application. In the drawings:

[0123] Figure 1 A structure schematic view of the optical lens of example one of the application is shown;

[0124] Figure 2 A structure schematic view of the optical lens of example two of the application is shown;

[0125] Figure 3 A structure schematic view of the optical lens of example three of the application is shown;

[0126] Figure 4 A structure schematic view of the optical lens of example four of the application is shown;

[0127] Figure 5 A structural schematic diagram of an optical lens of Example Five of the present application is shown;

[0128] Figure 6 A structural schematic diagram of an optical lens of Example Six of the present application is shown;

[0129] Figure 7 A structural schematic diagram of an optical lens of Example Seven of the present application is shown;

[0130] Figure 8 A structural schematic diagram of an optical lens of Example Eight of the present application is shown;

[0131] Figure 9 A structural schematic diagram of an optical lens of Example Nine of the present application is shown;

[0132] Figure 10 A structural schematic diagram of an optical lens of Example Ten of the present application is shown.

[0133] Wherein, the above-mentioned drawings include the following reference signs:

[0134] L1, first lens; S1, first side of the first lens; S2, second side of the first lens; L2, second lens; S3, first side of the second lens; S4, second side of the second lens; STO, stop; L3, third lens; S5, first side of the third lens; S6, second side of the third lens; L4, fourth lens; S7, first side of the fourth lens; S8, second side of the fourth lens; L5, fifth lens; S9, first side of the fifth lens; S10, second side of the fifth lens; L6, sixth lens; S11, first side of the sixth lens; S12, second side of the sixth lens; IMA, imaging plane. DETAILED DESCRIPTION

[0135] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0136] It should be noted that, unless otherwise specified, all the technical and scientific terms used in the present application have the same meaning as that generally understood by the ordinary skilled person in the technical field to which the present application belongs.

[0137] In the present application, unless otherwise specified, the orientation words such as "upper", "lower", "top", "bottom" are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity directions of the components themselves; likewise, for the convenience of understanding and description, "inner", "outer" refer to the inner and outer relative to the contour of the components themselves, but the above-mentioned orientation words are not used to limit the present application.

[0138] It should be noted that the terms first, second, third, etc. in the present specification are only used to distinguish one feature from another, and do not represent any limitation on the features. Therefore, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0139] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn strictly to scale.

[0140] In the present specification, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If the lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The surface of each lens near the first side is referred to as the first side surface of the lens, and the surface of each lens near the second side is referred to as the second side surface of the lens. The judgment of the surface shape in the paraxial region can be made according to the judgment method of those skilled in the art, with the R value (R refers to the radius of curvature in the paraxial region, usually refers to the R value on the lens data in the optical software) being positive or negative to judge the convexity or concavity. In terms of the first side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave. In terms of the second side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0141] It should be noted that the left side of the optical lens is the first side, and the right side of the optical lens is the second side.

[0142] In an exemplary embodiment, the optical lens provided by the present application can be used as a vehicle-mounted lens. For a vehicle-mounted lens, the left side is the object side, and the right side is the image side; the first side is the object side, and the second side is the image side. Light rays from the object side can be imaged on the image side.

[0143] When the optical lens of the present application is applied to a projection lens or a radar transmitting lens, the left side is the imaging side, and the right side is the image source side. In an exemplary embodiment, the optical lens provided by the present application can be used as, for example, a projection lens or a laser radar transmitting end lens. At this time, the image side of the optical lens can be the image source side, and the object side can be the imaging side. Light rays from the image source side can be imaged on the imaging side, and the imaging surface of the optical lens is the image source surface.

[0144] In order to solve the problem that the optical lens in the prior art cannot simultaneously have a short back focal length, high light flux, and a large field of view, the present application provides an optical lens and an electronic device.

[0145] Example 1

[0146] like Figures 1 to 10 As shown, the optical lens, from the first side to the second side, includes a first lens with positive optical power, a second lens with optical power, a third lens with positive optical power, a fourth lens with negative optical power, a fifth lens with positive optical power, and a sixth lens with positive optical power. The first side of the first lens is convex; the first side of the second lens is concave and the second side is convex; the first side of the third lens is convex and the second side is convex; the first side of the fourth lens is concave and the second side is concave; the first side of the fifth lens is convex and the second side is convex; and the first side of the sixth lens is convex and the second side is concave.

[0147] The first lens has positive optical power, which converges light, adjusts the light at the center and edge of the convergence point to improve the system illumination, and at the same time makes the light flow smoothly transition to the rear, reducing the system sensitivity; the first side of the first lens is convex, which is beneficial to the appearance, easy to clean, and not easy to accumulate dust.

[0148] The optical power of the second lens can be positive or negative. The first side of the second lens is concave, and the second side is convex. When the second lens has positive optical power, it is preferable to use a high refractive index material, which is beneficial for refracting light and achieving a larger field of view. At the same time, the second lens has a larger focal length, which is beneficial for the smooth transition of light to the rear, reducing the sensitivity of the lens. The concave first side of the second lens is beneficial for constricting the light rays at the front, so that the light rays in each field of view are close to parallel to the optical axis in the second lens, resulting in less light deflection and less energy loss. When the second lens has negative optical power, it further diverges the light, adjusts the light refraction angle, reduces chromatic aberration, and allows the diverged light to smoothly enter the rear, further smoothing the light path transition. The first side of the second lens is concave, working with the first lens to collect and converge light from the edge field of view. The second side of the second lens is convex, adjusting the light divergence angle, which helps to smooth the light path and reduce the sensitivity of the rear optical system. The concentric circle arrangement of the second lens creates an optical path difference between the peripheral light and the central light, diverging the central light and allowing it to enter the rear optical system. It also reduces the front diameter of the optical lens, reducing its size and contributing to miniaturization and cost reduction.

[0149] The third lens has positive optical power and can be used with the aperture stop to further narrow the light angle. The first and second sides of the third lens are convex. The first and second sides of the third lens are set to be biconvex, which facilitates the collection of light rays from the edge of the field of view by the rear optical system, reduces system aberrations, and improves system illumination.

[0150] The fourth lens has negative focal power, diverges light, adjusts the angle of light, and gently transitions the peripheral light, which is conducive to reducing the sensitivity of the lens; the first side surface of the fourth lens is a concave surface, the second side surface is a concave surface, and the fourth lens has a double-concave and relatively gentle surface shape, which can gently transition the light emitted by the front lens, reduce the degree of deflection, and rapidly increase the optical path difference of the light in the edge field of view and the central field of view, which is conducive to correcting the aberration of the edge field of view and improving the image quality.

[0151] The fifth lens has positive focal power and converges light, which can effectively converge the central light and the edge light in each field of view and increase the system illumination; the first side surface of the fifth lens is a convex surface that converges light and increases the system illumination, and the second side surface of the fifth lens is a convex surface that is conducive to lengthening the back focus, facilitating the assembly of the module and the adjustment of the focal length.

[0152] The sixth lens has positive focal power and a gentle shape, which allows the light to smoothly enter the rear and stably transition, is conducive to improving the astigmatism and field curvature of imaging, and improves the resolving power of the optical system; the first side surface of the sixth lens is a convex surface, and the second side surface is a concave surface, so that the light passing through the sixth lens to the imaging surface has a larger optical path, which is conducive to realizing small CRA.

[0153] The present application adopts six lenses, and by optimizing the focal power and surface shape of each lens, the optical lens of the present application has at least one beneficial effect of short back focus, high light flux, and large field of view.

[0154] In the present embodiment, the second side surface of the first lens is a convex surface. This arrangement causes the large-angle light in the edge field of view to be deflected inward after passing through the first lens, which is conducive to reducing the aperture of the rear-end lens of the system, achieving miniaturization, and reducing the cost of the lens.

[0155] In the present embodiment, the second side surface of the first lens is a plane. This arrangement can further gently transition the light and reduce the sensitivity of the lens.

[0156] In the present embodiment, the second side surface of the first lens is a concave surface. The first lens preferably uses a high refractive index material, and the combination of positive focal power is conducive to deflecting the light and achieving a larger field of view. At the same time, the focal length of the lens is large, which is conducive to gently transitioning the light to the rear and reducing the sensitivity of the lens; the second side surface of the first lens is a concave surface, which is conducive to converging the light in the front.

[0157] In the present embodiment, the second lens has positive focal power. The second lens preferably uses a high refractive index material, which is conducive to deflecting the light and achieving a larger field of view. At the same time, the focal length of the lens is large, which is conducive to gently transitioning the light to the rear and reducing the sensitivity of the lens.

[0158] In the embodiment, the second lens has a negative focal power. The arrangement is conducive to the second lens further diverging the light rays, adjusting the light ray deflection angle, reducing chromatic aberration, and smoothly entering the rear end of the diverging light rays, and further stabilizing the light ray trend.

[0159] In the embodiment, the optical lens further comprises a diaphragm between the second lens and the third lens. The arrangement is conducive to effectively converging the light rays entering the optical system, reducing the lens aperture at the rear end of the optical system, and reducing the assembly sensitivity of the system.

[0160] In the embodiment, the third lens and the fourth lens are cemented to form a double cemented lens. By arranging the double cemented lens, the influence of ghost images on the optical lens can be effectively eliminated, so that the optical lens ensures high resolution on the basis of eliminating ghost images. In addition, the air gap between the third lens and the fourth lens can be reduced, the total length of the system can be reduced, the tolerance sensitivity problem of the lens unit caused by the inclination / offset core during the assembly process can be reduced, the light loss caused by the reflection between the lenses can be reduced, the illumination can be improved, the field curvature can be further reduced, and the axial point aberration of the system can be corrected.

[0161] In the embodiment, the optical total length of the optical lens, that is, the center distance TTL from the first side of the first lens to the imaging surface, and the total focal length F of the optical lens satisfy: TTL / F≤5.8. Satisfying the condition formula can effectively limit the length of the optical lens under the condition of a certain focal length, which is conducive to the miniaturization of the optical lens. Preferably, TTL / F≤4.8.

[0162] In the embodiment, the optical total length of the optical lens, that is, the center distance TTL from the first side of the first lens to the imaging surface, the actual image height H corresponding to the maximum field angle of the optical lens, and the maximum field angle FOV of the optical lens satisfy: TTL / H / FOV≤1. Satisfying the condition formula can effectively limit the length of the optical lens under the condition of the same image height and the same field angle, which is conducive to the miniaturization. Preferably, TTL / H / FOV≤0.5.

[0163] In the embodiment, the optical total length of the optical lens, that is, the center distance TTL from the first side of the first lens to the imaging surface, the actual image height H corresponding to the maximum field angle of the optical lens, and the radian value θ of the maximum field angle of the optical lens satisfy: TTL / H / θ≥3. Satisfying the condition formula can effectively limit the length of the optical lens, and realize miniaturization. Preferably, TTL / H / θ≥5.

[0164] In the embodiment, the total optical length of the optical lens, i.e. the center distance TTL from the first side of the first lens to the imaging surface, and the maximum diameter DMAX of the lenses of the optical lens satisfy: TTL / DMAX≤5. Satisfying the condition, the TTL is short at the same imaging surface, and miniaturization can be achieved. Preferably, TTL / DMAX≤2.5.

[0165] In the embodiment, the total focal length F of the optical lens and the actual image height H corresponding to the maximum field angle of the optical lens satisfy: F / H≥0.5. By controlling the focal length and the image height within a certain range, the resolution is improved. Preferably, F / H≥1.

[0166] In the embodiment, the total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2. Satisfying the condition, the small FNO is ensured, the light quantity is increased, the entrance pupil diameter is large, and the relative luminance is improved. Preferably, F / ENPD≤0.9.

[0167] In the embodiment, the effective aperture DST of the diaphragm and the total focal length F of the optical lens satisfy: DST / F≤3. Satisfying the condition, the ratio of the diaphragm aperture to the focal length is large, and the aperture of the optical lens is large. Preferably, DST / F≤2.2.

[0168] In the embodiment, the actual image height H corresponding to the maximum field angle of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field angle of the optical lens satisfy: (H / 2) / (F*tan(θ / 2))≥0.001. The condition reflects the ratio of the actual image height to the ideal image height, and is beneficial to achieve large angular resolution. Preferably, (H / 2) / (F*tan(θ / 2))≥0.5.

[0169] In the embodiment, the optical back focal length of the optical lens, i.e. the center distance BFL from the second side of the last lens of the optical lens to the imaging surface, and the total optical length TTL of the optical lens, i.e. the center distance from the first side of the first lens to the imaging surface, satisfy: BFL / TTL≤0.091. Such setting is beneficial to meet the special requirements of the back focal length of the optical lens, and can also reserve space for optical element installation and focusing, avoiding mechanism interference. Preferably, BFL / TTL≤0.08.

[0170] In the embodiment, the focal length F6 of the sixth lens and the total focal length F of the optical lens satisfy: F6 / F≤3.4. Such setting ensures that the sixth lens has a short focal length, which is helpful for light collection and ensures the light quantity. Preferably, 0.181≤F6 / F≤3.4, more preferably, 0.281≤F6 / F≤3.3.

[0171] In the embodiment, the maximum field of view FOV of the optical lens, the overall focal length F of the optical lens, and the actual image height H corresponding to the maximum field of view of the optical lens satisfy: 69≥(FOV*F) / H≥60.1. The condition is satisfied, and the long focal length and the large field of view are simultaneously satisfied; the entire optical lens effect is conducive to the large field of view, and the central large-angle resolution is realized. Preferably, 68.2≥(FOV*F) / H≥60.8.

[0172] In the embodiment, the radius of curvature R3 of the first side surface of the second lens, the radius of curvature R4 of the second side surface of the second lens, and the central thickness d3 of the second lens satisfy: 0.87≤R3 / (R4+d3)≤1.33. The special lens shape setting (the shape is close to a concentric circle) makes the peripheral light rays and the central light rays have an optical path difference, diverges the central light rays, enters the rear optical system, and reduces the front aperture of the optical lens, reduces the volume, and is conducive to miniaturization and cost reduction. Preferably, 0.90≤R3 / (R4+d3)≤1.33.

[0173] In the embodiment, the focal length F1 of the first lens and the overall focal length F of the optical lens satisfy: 0.5≤F1 / F. By controlling the light ray trend of the first lens and the optical lens, the aberration caused by the large-angle light rays entering through the first lens is reduced, and at the same time, the lens structure in the optical lens is compact, which is conducive to miniaturization. Preferably, 1≤F1 / F. More preferably, 1≤F1 / F≤10.

[0174] In the embodiment, the overall focal length F of the optical lens and the focal length F2 of the second lens satisfy: -0.5≤F / F2. By controlling the ratio of the overall focal length to the focal length of the second lens, the light rays can smoothly enter the optical system, and at the same time, the light collection is facilitated, the light quantity is ensured, and the resolution is improved. Preferably, -0.2≤F / F2. More preferably, -0.2≤F / F2≤0.2.

[0175] In the embodiment, the radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy: R3 / R4≤3. The special shape setting of the second lens is conducive to the smooth transition of the light ray trend, reduces the system sensitivity, and improves the resolution. Preferably, R3 / R4≤2.

[0176] In the embodiment, the radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy: R5 / R6≤-0.01. The special shape setting of the third lens is conducive to the smooth transition of the light ray trend, reduces the system sensitivity, and improves the resolution. Preferably, R5 / R6≤-0.08.

[0177] In the embodiment, the radius of curvature R3 of the first side of the second lens, the radius of curvature R4 of the second side of the second lens, and the air gap d2 between the first lens and the second lens satisfy the condition: R3 / (R4+d2)≤2. The special shape of the second lens is beneficial to the smooth transition of the light path. Preferably, R3 / (R4+d2)≤1.5.

[0178] In the embodiment, the air gap d10 between the fifth lens and the sixth lens and the total optical length of the optical lens, i.e., the center distance TTL from the first side of the first lens to the imaging surface satisfy the condition: d10 / TTL≤2. The large air gap between the fifth lens and the sixth lens is beneficial to weakening the reflection of the lens and achieving the effect of no ghost image; meanwhile, the increase of the distance is beneficial to the reduction of the rear aperture and the smooth transition of the light path; meanwhile, in order to ensure the imaging quality (the distance is too large, the resolution is reduced), the air gap is controlled within a reasonable range. Preferably, d10 / TTL≤1.5.

[0179] In the embodiment, the sagittal height SAG7 of the first side of the fourth lens and the clear aperture D7 of the first side of the fourth lens satisfy the condition: arctan(SAG7 / D7)≤-0.01. By controlling the sagittal height and the aperture of the first side of the fourth lens to control the opening angle of the surface, the relative position of the secondary reflection ghost image pupil image of the first side of the fourth lens and the color filter on the focal plane can be changed, and by controlling the opening angle, the ghost image pupil image can be far away from the focal plane, effectively reducing the energy value of the ghost image and improving the imaging quality of the optical lens. Preferably, arctan(SAG7 / D7)≤-0.025.

[0180] In the embodiment, the lens group length of the optical lens, i.e., the center distance TL from the first side center of the first lens of the optical lens to the second side center of the last lens of the optical lens and the center thickness d5 of the third lens satisfy the condition: TL / d5≤-1. By satisfying the condition, the proportion of the distance between the third lens and the fourth lens in the total length of the lens group can be adjusted, which is helpful to improve the assembly yield. Preferably, TL / d5≤-10.

[0181] In the embodiment, the radius of curvature R7 of the first side of the fourth lens and the radius of curvature R8 of the second side of the fourth lens satisfy the condition: |R7 / R8|≤1.5. By satisfying the condition, the fourth lens can collect more light and increase the light transmission capacity of the system. Preferably, |R7 / R8|≤1.

[0182] In this embodiment, the radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy the condition: 1 / (1 / R3-1 / R4)≤-15. By controlling the R values ​​of both sides of the second lens within a certain range, it is beneficial to achieve a large aperture. Preferably, 1 / (1 / R3-1 / R4)≤-30.

[0183] Example 2

[0184] like Figures 1 to 10 As shown, an optical lens is provided, comprising, from the first side to the second side: a first lens with positive optical power; a second lens with optical power; a third lens with positive optical power; a fourth lens with negative optical power; a fifth lens with positive optical power; and a sixth lens with positive optical power. The radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy the condition: R3 / R4≤3. The special shape of the second lens facilitates a smooth transition of light path, reduces system sensitivity, and improves resolution. Preferably, R3 / R4≤2.

[0185] In this embodiment, the first side surface of the first lens is convex, and the second side surface is also convex. The first lens has positive optical power, converging light rays, adjusting the convergence center and edge light rays to improve system illumination, while ensuring a smooth transition of light rays to the rear, reducing system sensitivity. The convexity of the first side surface of the first lens contributes to aesthetics, facilitates cleaning, and reduces dust accumulation. The convexity of the second side surface of the first lens causes large-angle light rays at the edge of the field of view to be deflected inward after passing through the first lens, which helps to reduce the aperture of the rear lens of the system, achieving miniaturization while reducing lens costs.

[0186] In this embodiment, the first side surface of the first lens is convex, and the second side surface is flat. The convexity of the first side surface improves aesthetics, facilitates cleaning, and reduces dust accumulation. The flatness of the second side surface further smooths out light and reduces the lens's sensitivity.

[0187] In this embodiment, the first side of the first lens is convex, and the second side is concave. The convex first side of the first lens improves its appearance, facilitates cleaning, and reduces dust accumulation. The first lens preferably uses a high refractive index material, and its positive focal length helps deflect light, achieving a wider field of view. Simultaneously, the larger focal length facilitates a smoother transition of light to the rear, reducing lens sensitivity. The concave second side of the first lens helps to control the amount of light entering the front.

[0188] In the embodiment, the second lens has positive refractive power, the first side surface of the second lens is concave, and the second side surface is convex. The positive refractive power is conducive to the deflection of light rays, and a larger field of view is achieved. Meanwhile, the focal length of the second lens is relatively large, which is conducive to the smooth transition of light rays to the rear, and reduces the sensitivity of the lens. The first side surface of the second lens is concave, which is conducive to the contraction of light rays at the front end, so that the light rays of each field of view are approximately parallel to the optical axis in the second lens, and the deflection of light rays is small, and the energy loss is small.

[0189] In the embodiment, the second lens has negative refractive power, the first side surface of the second lens is concave, and the second side surface is convex. The negative refractive power can further disperse the light rays, adjust the deflection angle of the light rays, reduce the chromatic aberration, make the dispersed light rays smoothly enter the rear, and further make the light rays transition smoothly. The first side surface of the second lens is concave, which cooperates with the first lens to collect and converge the light rays of the edge field of view. The second side surface of the second lens is convex, which adjusts the divergence angle of the light rays, is conducive to the smooth transition of the light rays, and reduces the sensitivity of the rear optical system. The concentric circles of the second lens are arranged to make the peripheral light rays and the central light rays have an optical path difference, disperse the central light rays, enter the rear optical system, and reduce the front aperture of the optical lens, thereby reducing the volume and being conducive to miniaturization and cost reduction.

[0190] In the embodiment, the first side surface of the third lens is convex, and the second side surface is convex. The positive refractive power can cooperate with the diaphragm to further contract the light ray angle. The first side surface and the second side surface of the third lens are arranged to be double convex, which is conducive to the collection of the light rays of the edge field of view by the rear optical system, reduces the system aberration, and improves the system illumination.

[0191] In the embodiment, the first side surface of the fourth lens is concave, and the second side surface is concave. The negative refractive power disperses the light rays, adjusts the angle of the light rays, and smoothly transitions the peripheral light rays, which is conducive to reducing the sensitivity of the lens. The first side surface and the second side surface of the fourth lens are concave, and the surface shape of the fourth lens is double concave and relatively smooth, which can make the light rays emitted by the front lens transition smoothly, reduce the deflection degree, and rapidly increase the optical path difference between the light rays of the edge field of view and the central field of view, which is conducive to correcting the aberration of the edge field of view and improving the image quality.

[0192] In the embodiment, the first side surface of the fifth lens is convex, and the second side surface is convex. The positive refractive power has a converging effect on the light rays, which can effectively converge the central light rays and the edge light rays of each field of view, and increase the system illumination. The first side surface of the fifth lens is convex, which converges the light rays and increases the system illumination. The second side surface of the fifth lens is convex, which is conducive to the lengthening of the back focus, facilitates the assembly of the module, and adjusts the focal length.

[0193] In the embodiment, the first side surface of the sixth lens is convex, and the second side surface is concave. The positive focal power and the flat lens shape make the light smoothly enter the rear, and the light trend is smoothly transitioned, which is beneficial to improve the image scatter and the field curvature of the imaging, and improve the resolving power of the optical system; the first side surface of the sixth lens is convex, and the second side surface is concave, so that the light passing through the sixth lens to the imaging surface has a larger optical path, which is beneficial to realize small CRA.

[0194] The application adopts six lenses, and by optimizing the focal power and surface shape of each lens, the optical lens has at least one beneficial effect of short back focus, high light flux and large field of view.

[0195] In the embodiment, the optical lens further comprises a diaphragm, and the diaphragm is located between the second lens and the third lens. The arrangement is beneficial to effectively converge the light entering the optical system, reduce the lens aperture at the rear end of the optical system, and reduce the assembly sensitivity of the system.

[0196] In the embodiment, the third lens and the fourth lens are cemented to form a double cemented lens. By arranging the double cemented lens, the influence of ghost image on the optical lens can be effectively eliminated, so that the optical lens can ensure high resolution on the basis of eliminating ghost image. In addition, the air gap between the third lens and the fourth lens can be reduced, the total length of the system can be reduced, the tilt / bias core tolerance sensitivity problem of the lens unit caused in the assembly process can be reduced, the light loss caused by reflection between lenses can be reduced, the illumination can be improved, the field curvature can be further reduced, and the axial point aberration of the system can be corrected.

[0197] In the embodiment, the optical total length of the optical lens, i.e. the center distance TTL from the first side surface of the first lens to the imaging surface, and the total focal length F of the optical lens satisfy: TTL / F≤5.8. Satisfying the condition formula, in the case of a certain focal length, the length of the optical lens can be effectively limited, which is beneficial to realize the miniaturization of the optical lens. Preferably, TTL / F≤4.8.

[0198] In the embodiment, the optical total length of the optical lens, i.e. the center distance TTL from the first side surface of the first lens to the imaging surface, the actual image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: TTL / H / FOV≤1. Satisfying the condition formula, in the case of the same image height and the same field of view, the length of the optical lens can be effectively limited, which is beneficial to realize the miniaturization. Preferably, TTL / H / FOV≤0.5.

[0199] In the embodiment, the total optical length of the optical lens, i.e. the center distance TTL from the first side of the first lens to the imaging surface, the actual image height H corresponding to the maximum field angle of the optical lens, and the radian value θ of the maximum field angle of the optical lens satisfy: TTL / H / θ≥3. Satisfying the condition formula can effectively limit the length of the optical lens, and miniaturization is achieved. Preferably, TTL / H / θ≥5.

[0200] In the embodiment, the total optical length of the optical lens, i.e. the center distance TTL from the first side of the first lens to the imaging surface, and the maximum diameter DMAX of the lens of the optical lens satisfy: TTL / DMAX≤5. Satisfying the condition formula, TTL is short under the same imaging surface, and miniaturization can be achieved. Preferably, TTL / DMAX≤2.5.

[0201] In the embodiment, the total focal length F of the optical lens and the actual image height H corresponding to the maximum field angle of the optical lens satisfy: F / H≥0.5. By controlling the focal length and the image height within a certain range, the resolution is improved. Preferably, F / H≥1.

[0202] In the embodiment, the total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2. Satisfying the condition formula is beneficial to ensure small FNO, increase the light quantity, and increase the relative luminance. Preferably, F / ENPD≤0.9.

[0203] In the embodiment, the effective aperture DST of the diaphragm and the total focal length F of the optical lens satisfy: DST / F≤3. Satisfying the condition formula ensures that the ratio of the diaphragm aperture to the focal length is large, and the aperture of the optical lens is large. Preferably, DST / F≤2.2.

[0204] In the embodiment, the actual image height H corresponding to the maximum field angle of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field angle of the optical lens satisfy: (H / 2) / (F*tan(θ / 2))≥0.001. The condition reflects the ratio of the actual image height to the ideal image height, which is beneficial to realize large angular resolution. Preferably, (H / 2) / (F*tan(θ / 2))≥0.5.

[0205] In the embodiment, the total optical length of the optical lens, i.e. the center distance TTL from the first side of the first lens to the imaging surface, and the total focal length F of the optical lens satisfy: TTL / F≤0.5. Satisfying the condition formula is beneficial to ensure that the total length of the optical lens is short, and the size of the optical lens is small. Preferably, TTL / F≤0.3.

[0206] In the embodiment, the focal length F6 of the sixth lens and the overall focal length F of the optical lens satisfy: F6 / F≤3.4. Such setting ensures that the sixth lens has a short focal length, which is helpful for light collection and ensures the light quantity. Preferably, 0.181≤F6 / F≤3.4, and more preferably, 0.281≤F6 / F≤3.3.

[0207] In the embodiment, the maximum field of view FOV of the optical lens, the overall focal length F of the optical lens, and the actual image height H corresponding to the maximum field of view of the optical lens satisfy: 69≥(FOV*F) / H≥60.1. Such condition is satisfied to simultaneously satisfy the long focal length and the large field of view, which is helpful for the optical lens to have a large field of view and to achieve a large central angular resolution. Preferably, 68.2≥(FOV*F) / H≥60.8.

[0208] In the embodiment, the curvature radius R3 of the first side surface of the second lens, the curvature radius R4 of the second side surface of the second lens, and the central thickness d3 of the second lens satisfy: 0.87≤R3 / (R4+d3)≤1.33. The special lens shape setting (the shape is close to a concentric circle) makes the peripheral light rays and the central light rays have an optical path difference, diverges the central light rays, enters the rear optical system, and reduces the front aperture of the optical lens, thereby reducing the volume and being helpful for miniaturization and cost reduction. Preferably, 0.90≤R3 / (R4+d3)≤1.33.

[0209] In the embodiment, the focal length F1 of the first lens and the overall focal length F of the optical lens satisfy: 0.5≤F1 / F. By controlling the light path of the first lens and the optical lens, the aberration caused by the large-angle light rays entering through the first lens is reduced, and at the same time, the lens structure in the optical lens is compact, which is helpful for miniaturization. Preferably, 1≤F1 / F. More preferably, 1≤F1 / F≤10.

[0210] In the embodiment, the overall focal length F of the optical lens and the focal length F2 of the second lens satisfy: -0.5≤F / F2. By controlling the ratio of the overall focal length to the focal length of the second lens, the light rays can smoothly enter the optical system, and at the same time, it is helpful for light collection, ensures the light quantity, and improves the resolution. Preferably, -0.2≤F / F2. More preferably, -0.2≤F / F2≤0.2.

[0211] In the embodiment, the curvature radius R5 of the first side surface of the third lens and the curvature radius R6 of the second side surface of the third lens satisfy: R5 / R6≤-0.01. The special shape setting of the third lens is helpful for smooth transition of the light path, reduces the system sensitivity, and improves the resolution. Preferably, R5 / R6≤-0.08.

[0212] In the embodiment, the radius of curvature R3 of the first side of the second lens, the radius of curvature R4 of the second side of the second lens, and the air gap d2 between the first lens and the second lens satisfy the condition: R3 / (R4+d2)≤2. The special shape of the second lens is beneficial to the smooth transition of the light path. Preferably, R3 / (R4+d2)≤1.5.

[0213] In the embodiment, the air gap d10 between the fifth lens and the sixth lens and the total optical length of the optical lens, i.e., the center distance TTL from the first side of the first lens to the imaging surface satisfy the condition: d10 / TTL≤2. The large air gap between the fifth lens and the sixth lens is beneficial to weakening the reflection of the lens and achieving the effect of no ghost image; meanwhile, the increase of the distance is beneficial to the reduction of the rear aperture and the smooth transition of the light path; meanwhile, in order to ensure the imaging quality (the distance is too large, the resolution is reduced), the air gap is controlled within a reasonable range. Preferably, d10 / TTL≤1.5.

[0214] In the embodiment, the sagittal height SAG7 of the first side of the fourth lens and the clear aperture D7 of the first side of the fourth lens satisfy the condition: arctan(SAG7 / D7)≤-0.01. By controlling the sagittal height and the aperture of the first side of the fourth lens to control the opening angle of the surface, the relative position of the secondary reflection ghost image pupil image of the first side of the fourth lens and the color filter on the focal plane can be changed, and by controlling the opening angle, the ghost image pupil image can be far away from the focal plane, effectively reducing the energy value of the ghost image and improving the imaging quality of the optical lens. Preferably, arctan(SAG7 / D7)≤-0.025.

[0215] In the embodiment, the lens group length of the optical lens, i.e., the center distance TL from the first side center of the first lens of the optical lens to the second side center of the last lens of the optical lens and the center thickness d5 of the third lens satisfy the condition: TL / d5≤-1. By satisfying the condition, the proportion of the distance between the third lens and the fourth lens in the total length of the lens group can be adjusted, which is helpful to improve the assembly yield. Preferably, TL / d5≤-10.

[0216] In the embodiment, the radius of curvature R7 of the first side of the fourth lens and the radius of curvature R8 of the second side of the fourth lens satisfy the condition: |R7 / R8|≤1.5. By satisfying the condition, the fourth lens can collect more light and increase the light transmission capacity of the system. Preferably, |R7 / R8|≤1.

[0217] In the embodiment, the radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy: 1 / (1 / R3-1 / R4)≤-15. By controlling the R values of the two surfaces of the second lens within a certain range, a large aperture is facilitated. Preferably, 1 / (1 / R3-1 / R4)≤-30.

[0218] Optionally, the optical lens described above can further include a color filter for correcting color deviation and a protective glass for protecting the photosensitive element located on the imaging surface.

[0219] The optical lens in the present application can adopt multiple lenses, for example, the six lenses described above. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. When the imaging quality is emphasized, the number of aspherical lenses can be increased. The aspherical lens has the characteristic that the curvature is continuously changed from the center of the lens to the periphery of the lens. Unlike the spherical lens which has a constant curvature from the center of the lens to the periphery of the lens, the aspherical lens has better curvature radius characteristics, and has the advantages of improving distortion aberration and improving astigmatism aberration. After using the aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0220] In the exemplary embodiment, the present scheme does not limit the plastic and glass of the lens. If the temperature performance is emphasized, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens can all be glass lenses. The optical lens made of glass can suppress the shift of the back focus of the optical lens with temperature change, thereby improving the system stability. At the same time, using glass material can avoid the imaging blur of the lens caused by high and low temperature changes in the use environment, thereby affecting the normal use of the optical lens. For example, the optical lens with all-glass design has a wide temperature range and can maintain stable optical performance in the range of -40℃ to 105℃. Specifically, when the resolution quality and reliability are emphasized, the first lens to the sixth lens can all be glass aspherical lenses. Of course, in the application field with low temperature stability requirement, the first lens to the sixth lens in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce the manufacturing cost. Of course, the first lens to the sixth lens in the optical lens can also be made of plastic and glass.

[0221] The present application also provides an electronic device including the optical lens described above and an imaging element for converting the optical image formed by the optical lens into an electrical signal. The imaging element can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The electronic device can be a separate imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The electronic device is equipped with the optical lens described above.

[0222] However, those skilled in the art will understand that the number of lenses constituting the optical lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although six lenses are described as an example in the embodiments, the optical lens is not limited to including six lenses. If necessary, the optical lens may also include other numbers of lenses.

[0223] The following description, with reference to the accompanying drawings, further illustrates examples of specific surface shapes and parameters of optical lenses applicable to the above embodiments.

[0224] It should be noted that any of the examples one through ten below are applicable to all embodiments of this application.

[0225] Example 1

[0226] like Figure 1 The diagram shown is a schematic of the optical lens structure of Example 1.

[0227] like Figure 1 As shown, the optical lens, from the first side to the second side, includes: a first lens L1, a second lens L2, an aperture stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an imaging plane IMA.

[0228] The first lens L1 has positive optical power, and its first side surface S1 and second side surface S2 are both convex. The second lens L2 has negative optical power, and its first side surface S3 and second side surface S4 are both convex. The third lens L3 has positive optical power, and its first side surface S5 and second side surface S6 are both convex. The fourth lens L4 has negative optical power, and its first side surface S7 and second side surface S8 are both concave. The fifth lens L5 has positive optical power, and its first side surface S9 and second side surface S10 are both convex. The sixth lens L6 has positive optical power, and its first side surface S11 and second side surface S12 are both convex.

[0229] In this example, the total focal length F of the optical lens is 13.491mm, the maximum field of view (FOV) of the optical lens is 43.200°, and the total optical length (TTL) of the optical lens is 56.916mm.

[0230] Table 1 shows the basic structural parameters of the optical lens in Example 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0231] Surf Radius Thickness Nd Vd 1 122.2945 8.5000 1.75 52.34 2 -122.2945 7.3555 3 -18.1422 10.0026 1.85 23.79 4 -27.6002 6.3248 STO Infinity -3.2520 5 23.6746 6.3361 1.75 52.34 6 -106.5698 2.0204 7 -28.6931 1.9959 1.85 23.79 8 581.4999 0.4937 9 96.4605 4.6426 1.75 52.34 10 -34.8788 0.4931 11 11.6804 7.7350 1.80 46.57 12 19.6717 4.2678 IMA / /

[0232] Table 1

[0233] Example Two

[0234] As shown in FIG. 2, it is a schematic view of the optical lens structure of Example Two. Figure 2

[0235] As shown in FIG. 2, the optical lens sequentially comprises, from the first side to the second side: a first lens L1, a second lens L2, a stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an imaging plane IMA. Figure 2 The first lens L1 has positive refractive power, the first side S1 of the first lens is a convex surface, and the second side S2 of the first lens is a convex surface. The second lens L2 has negative refractive power, the first side S3 of the second lens is a concave surface, and the second side S4 of the second lens is a convex surface. The third lens L3 has positive refractive power, the first side S5 of the third lens is a convex surface, and the second side S6 of the third lens is a convex surface. The fourth lens L4 has negative refractive power, the first side S7 of the fourth lens is a concave surface, and the second side S8 of the fourth lens is a concave surface. The fifth lens L5 has positive refractive power, the first side S9 of the fifth lens is a convex surface, and the second side S10 of the fifth lens is a convex surface. The sixth lens L6 has positive refractive power, the first side S11 of the sixth lens is a convex surface, and the second side S12 of the sixth lens is a concave surface.

[0236] In this example, the total focal length F of the optical lens is 13.561 mm, the maximum field of view FOV of the optical lens is 43.200°, and the total optical length TTL of the optical lens is 56.916 mm.

[0237] Table 2 shows the basic structure parameter table of the optical lens of Example Two, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0238]

[0239]

[0240]

[0241] Table 2

[0242] Example Three

[0243] As shown in FIG. 3, it is a schematic view of the optical lens structure of Example Three. Figure 3

[0244] As shown in FIG. 3, the optical lens sequentially comprises, from the first side to the second side: a first lens L1, a second lens L2, a stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an imaging plane IMA. Figure 3 The first lens L1 has positive refractive power, the first side S1 of the first lens is a convex surface, and the second side S2 of the first lens is a convex surface. The second lens L2 has negative refractive power, the first side S3 of the second lens is a concave surface, and the second side S4 of the second lens is a convex surface. The third lens L3 has positive refractive power, the first side S5 of the third lens is a convex surface, and the second side S6 of the third lens is a convex surface. The fourth lens L4 has negative refractive power, the first side S7 of the fourth lens is a concave surface, and the second side S8 of the fourth lens is a concave surface. The fifth lens L5 has positive refractive power, the first side S9 of the fifth lens is a convex surface, and the second side S10 of the fifth lens is a convex surface. The sixth lens L6 has positive refractive power, the first side S11 of the sixth lens is a convex surface, and the second side S12 of the sixth lens is a concave surface.​​​

[0245] The first lens L1 has positive refractive power, the first side S1 of the first lens is a convex surface, and the second side S2 of the first lens is a plane. The second lens L2 has negative refractive power, the first side S3 of the second lens is a concave surface, and the second side S4 of the second lens is a convex surface. The third lens L3 has positive refractive power, the first side S5 of the third lens is a convex surface, and the second side S6 of the third lens is a convex surface. The fourth lens L4 has negative refractive power, the first side S7 of the fourth lens is a concave surface, and the second side S8 of the fourth lens is a concave surface. The fifth lens L5 has positive refractive power, the first side S9 of the fifth lens is a convex surface, and the second side S10 of the fifth lens is a convex surface. The sixth lens L6 has positive refractive power, the first side S11 of the sixth lens is a convex surface, and the second side S12 of the sixth lens is a concave surface.

[0246] In this example, the total track length TTL of the optical lens is 56.057 mm.

[0247] Table 3 shows the basic structural parameter table of the optical lens of Example Three, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0248]

[0249]

[0250] Table 3

[0251] Example Four

[0252] As shown in Table 4, the basic structural parameter table of the optical lens of Example Four is shown. Figure 4

[0253] As shown in Table 4, the basic structural parameter table of the optical lens of Example Four is shown. Figure 4

[0254] ​​The first lens L1 has positive refractive power, the first side S1 of the first lens is a convex surface, and the second side S2 of the first lens is a plane. The second lens L2 has negative refractive power, the first side S3 of the second lens is a concave surface, and the second side S4 of the second lens is a convex surface. The third lens L3 has positive refractive power, the first side S5 of the third lens is a convex surface, and the second side S6 of the third lens is a convex surface. The fourth lens L4 has negative refractive power, the first side S7 of the fourth lens is a concave surface, and the second side S8 of the fourth lens is a concave surface. The fifth lens L5 has positive refractive power, the first side S9 of the fifth lens is a convex surface, and the second side S10 of the fifth lens is a convex surface. The sixth lens L6 has positive refractive power, the first side S11 of the sixth lens is a convex surface, and the second side S12 of the sixth lens is a concave surface.

[0255] In this example, the total track length TTL of the optical lens is 56.057 mm.

[0256] Table 4 shows the basic structure parameter table of the optical lens of Example Four, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0257] Surf Radius Thickness Nd Vd 1 53.1225 9.5000 1.75 52.34 2 Infinity 7.3555 3 -27.4766 10.0026 1.85 23.79 4 -39.7421 5.3248 STO Infinity -2.2520 5 21.2018 6.3361 1.75 52.34 6 -96.6954 2.0204 7 -34.0433 1.9959 1.85 23.79 8 112.4060 0.4937 9 42.2755 4.6426 1.75 52.34 10 -88.2321 0.4931 11 12.3441 7.7350 1.80 46.57 12 47.0798 2.4098 IMA / /

[0258] Table 4

[0259] Example Five

[0260] As shown in Table 4, the optical lens of Example Five has a total track length TTL of 56.057 mm. Figure 5

[0261] As shown in Table 4, the optical lens of Example Five has a total track length TTL of 56.057 mm. Figure 5 As shown in Table 4, the optical lens of Example Five has a total track length TTL of 56.057 mm.

[0262] ​The first lens L1 has positive refractive power, the first side S1 of the first lens is convex, and the second side S2 of the first lens is concave. The second lens L2 has negative refractive power, the first side S3 of the second lens is concave, and the second side S4 of the second lens is convex. The third lens L3 has positive refractive power, the first side S5 of the third lens is convex, and the second side S6 of the third lens is convex. The fourth lens L4 has negative refractive power, the first side S7 of the fourth lens is concave, and the second side S8 of the fourth lens is concave. The fifth lens L5 has positive refractive power, the first side S9 of the fifth lens is convex, and the second side S10 of the fifth lens is convex. The sixth lens L6 has positive refractive power, the first side S11 of the sixth lens is convex, and the second side S12 of the sixth lens is concave.

[0263] In this example, the total track length TTL of the optical lens is 58.557 mm.

[0264] Table 5 shows the basic structure parameter table of the optical lens of Example Five, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0265] Surf Radius Thickness Nd Vd 1 52.2945 9.5000 1.75 52.34 2 150.0000 8.3555 3 -20.1420 10.0026 1.85 23.79 4 -28.1190 6.8248 STO Infinity -3.2520 6 19.6329 6.3361 1.75 52.34 7 -212.5857 2.0204 8 -34.1593 2.4959 1.85 23.79 9 -424.4026 0.9937 10 21.3332 4.6426 1.75 52.34 11 117.7313 0.4931 12 14.2434 7.7350 1.80 46.57 13 27.5633 2.4098 IMA / /

[0266] Table 5

[0267] Example Six

[0268] As shown in Table 5, the optical lens of Example Six has a total track length TTL of 58.557 mm. Figure 6

[0269] As shown in Table 5, the optical lens of Example Six has a total track length TTL of 58.557 mm. Figure 6

[0270] ​​The first lens L1 has positive refractive power, the first side S1 of the first lens is convex, and the second side S2 of the first lens is concave. The second lens L2 has negative refractive power, the first side S3 of the second lens is concave, and the second side S4 of the second lens is convex. The third lens L3 has positive refractive power, the first side S5 of the third lens is convex, and the second side S6 of the third lens is convex. The fourth lens L4 has negative refractive power, the first side S7 of the fourth lens is concave, and the second side S8 of the fourth lens is concave. The fifth lens L5 has positive refractive power, the first side S9 of the fifth lens is convex, and the second side S10 of the fifth lens is convex. The sixth lens L6 has positive refractive power, the first side S11 of the sixth lens is convex, and the second side S12 of the sixth lens is concave.

[0271] In the present example, the total track length TTL of the optical lens is 60.557 mm.

[0272] Table 6 shows the basic structure parameter table of the optical lens of Example 6, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0273] Surf Radius Thickness Nd Vd 1 52.2945 9.5000 1.75 52.34 2 150.0000 8.3555 3 -17.0945 10.0026 1.85 23.79 4 -22.9219 6.8248 STO Infinity -3.2520 6 19.3946 6.3361 1.75 52.34 7 3236.8556 2.0204 8 -38.6810 2.4959 1.85 23.79 9 -424.4026 0.9937 10 21.3332 4.6426 1.75 52.34 11 117.7313 0.4931 12 14.9750 7.7350 1.80 46.57 13 21.3661 2.4098 IMA / /

[0274] Table 6

[0275] Example Seven

[0276] As shown in Table 6, the optical lens of Example 7 has a total track length TTL of 60.557 mm. Figure 7 As shown in Table 6, the optical lens of Example 7 has a total track length TTL of 60.557 mm.

[0277] As shown in Table 6, the optical lens of Example 7 has a total track length TTL of 60.557 mm. Figure 7 As shown in Table 6, the optical lens of Example 7 has a total track length TTL of 60.557 mm.

[0278] The first lens L1 has positive refractive power, the first side S1 of the first lens is convex, and the second side S2 of the first lens is convex. The second lens L2 has negative refractive power, the first side S3 of the second lens is concave, and the second side S4 of the second lens is convex. The third lens L3 has positive refractive power, the first side S6 of the third lens is convex, and the second side S7 of the third lens is convex. The fourth lens L4 has negative refractive power, the first side S7 of the fourth lens is concave, and the second side S8 of the fourth lens is concave. The fifth lens L5 has positive refractive power, the first side S9 of the fifth lens is convex, and the second side S10 of the fifth lens is convex. The sixth lens L6 has positive refractive power, the first side S11 of the sixth lens is convex, and the second side S12 of the sixth lens is concave.

[0279] In this example, the third lens L3 and the fourth lens L4 are cemented to form a double cemented lens.

[0280] In this example, the total focal length F of the optical lens is 13.754 mm, the maximum field of view FOV of the optical lens is 43.200°, and the total track length TTL of the optical lens is 56.627 mm.

[0281] Table 7 shows the basic structure parameter table of the optical lens of Example Seven, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0282] Surf Radius Thickness Nd Vd 1 97.4782 8.5000 1.75 52.34 2 -97.4782 5.9958 3 -18.4412 10.0376 1.85 23.79 4 -25.9036 7.0011 STO Infinity -2.3612 6 30.6298 5.8370 1.75 52.34 7 -51.3018 3.6095 1.85 23.79 8 97.0771 0.8865 9 41.6597 4.7174 1.75 52.34 10 88.2477 0.4818 11 12.2371 7.6973 1.80 46.57 12 57.1498 4.2244 IMA / /

[0283] Table 7

[0284] Example Eight

[0285] As shown in Table 8, the basic structure parameter table of the optical lens of Example Eight is shown. Figure 8

[0286] As shown in Table 8, the basic structure parameter table of the optical lens of Example Eight is shown. Figure 8

[0287] ​​The first lens L1 has positive refractive power, the first side S1 of the first lens is convex, and the second side S2 of the first lens is convex. The second lens L2 has negative refractive power, the first side S3 of the second lens is concave, and the second side S4 of the second lens is convex. The third lens L3 has positive refractive power, the first side S6 of the third lens is convex, and the second side S7 of the third lens is convex. The fourth lens L4 has negative refractive power, the first side S7 of the fourth lens is concave, and the second side S8 of the fourth lens is concave. The fifth lens L5 has positive refractive power, the first side S9 of the fifth lens is convex, and the second side S10 of the fifth lens is convex. The sixth lens L6 has positive refractive power, the first side S11 of the sixth lens is convex, and the second side S12 of the sixth lens is concave.

[0288] In this example, the third lens L3 and the fourth lens L4 are cemented to form a double cemented lens.

[0289] In this example, the total track length TTL of the optical lens is 59.161 mm.

[0290] Table 8 shows the basic structure parameter table of the optical lens of Example Eight, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0291]

[0292]

[0293] Table 8

[0294] Example Nine

[0295] As shown in Table 9, the basic structure parameter table of the optical lens of Example Nine is shown. Figure 9 As shown in Table 9, the basic structure parameter table of the optical lens of Example Nine is shown.

[0296] As shown in Table 9, the basic structure parameter table of the optical lens of Example Nine is shown. Figure 9 As shown in Table 9, the basic structure parameter table of the optical lens of Example Nine is shown.

[0297] The first lens L1 has positive refractive power, the first side S1 of the first lens is a convex surface, and the second side S2 of the first lens is a plane. The second lens L2 has positive refractive power, the first side S3 of the second lens is a concave surface, and the second side S4 of the second lens is a convex surface. The third lens L3 has positive refractive power, the first side S5 of the third lens is a convex surface, and the second side S6 of the third lens is a convex surface. The fourth lens L4 has negative refractive power, the first side S7 of the fourth lens is a concave surface, and the second side S8 of the fourth lens is a concave surface. The fifth lens L5 has positive refractive power, the first side S9 of the fifth lens is a convex surface, and the second side S10 of the fifth lens is a convex surface. The sixth lens L6 has positive refractive power, the first side S11 of the sixth lens is a convex surface, and the second side S12 of the sixth lens is a concave surface.

[0298] In the present example, the total track length TTL of the optical lens is 56.057 mm.

[0299] Table 9 shows the basic structure parameter table of the optical lens of Example Nine, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0300]

[0301]

[0302] Table 9

[0303] Example Ten

[0304] As shown in Table 10, the optical lens of Example Ten has a total track length TTL of 56.057 mm, a total focal length F of 14.808 mm, and a maximum field of view FOV of 43.200°. Figure 10 As shown in Table 10, the optical lens of Example Ten has a total track length TTL of 56.057 mm, a total focal length F of 14.808 mm, and a maximum field of view FOV of 43.200°.

[0305] As shown in Table 10, the optical lens of Example Ten has a total track length TTL of 56.057 mm, a total focal length F of 14.808 mm, and a maximum field of view FOV of 43.200°. Figure 10 As shown in Table 10, the optical lens of Example Ten has a total track length TTL of 56.057 mm, a total focal length F of 14.808 mm, and a maximum field of view FOV of 43.200°.

[0306] The first lens L1 has positive refractive power, the first side S1 of the first lens is a convex surface, and the second side S2 of the first lens is a plane. The second lens L2 has positive refractive power, the first side S3 of the second lens is a concave surface, and the second side S4 of the second lens is a convex surface. The third lens L3 has positive refractive power, the first side S5 of the third lens is a convex surface, and the second side S6 of the third lens is a convex surface. The fourth lens L4 has negative refractive power, the first side S7 of the fourth lens is a concave surface, and the second side S8 of the fourth lens is a concave surface. The fifth lens L5 has positive refractive power, the first side S9 of the fifth lens is a convex surface, and the second side S10 of the fifth lens is a convex surface. The sixth lens L6 has positive refractive power, the first side S11 of the sixth lens is a convex surface, and the second side S12 of the sixth lens is a concave surface.

[0307] In the present example, the total track length TTL of the optical lens is 56.257 mm.

[0308] Table 10 shows the basic structure parameter table of the optical lens of example ten, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0309] Surf Radius Thickness Nd Vd 1 54.5890 9.5000 1.75 52.34 2 Infinity 7.3560 3 -25.3140 10.0030 1.85 23.79 4 -29.1190 5.3250 STO Infinity -2.0520 5 25.6890 6.3360 1.75 52.34 6 -96.6950 2.0200 1.85 23.79 7 -34.0430 1.9660 8 112.4060 0.4940 1.75 52.34 9 42.2760 4.6430 10 -88.2320 0.4930 1.80 46.57 11 12.3440 7.7350 12 47.0800 2.4100 IMA / /

[0310] Table 10

[0311] In summary, examples one to ten satisfy the relationships shown in Table 11.

[0312] Conditional expression / Example 1 2 3 4 5 6 7 8 9 10 TTL / F 4.219 4.197 3.915 3.730 4.152 4.276 4.117 4.256 3.786 3.738 TTL / H / FOV 0.141 0.140 0.131 0.124 0.139 0.146 0.142 0.148 0.124 0.124 TTL / H / θ 8.084 8.043 7.478 7.095 7.989 8.364 8.125 8.490 7.114 7.132 TTL / DMAX 1.138 1.138 1.581 1.464 1.645 1.804 1.133 1.183 1.462 1.453 F / H 1.445 1.445 1.440 1.434 1.451 1.475 1.488 1.504 1.417 1.439 F / ENPD 0.620 0.620 0.620 0.620 0.620 0.620 0.620 0.620 0.620 0.620 DST / F 1.811 1.817 1.512 1.437 1.592 1.680 1.659 1.585 1.500 1.384 (H / 2) / (F*tan(θ / 2)) 0.874 0.874 0.877 0.880 0.870 0.856 0.849 0.839 0.891 0.878 BFL / TTL 0.075 0.075 0.043 0.043 0.041 0.040 0.075 0.072 0.043 0.043 F6 / F 1.839 1.917 1.314 1.252 1.993 3.291 1.319 1.272 1.616 1.250 (FOV*F) / H 62.419 62.420 62.223 61.962 62.675 63.705 64.276 64.984 61.216 62.155 R3 / (R4+d3) 1.031 1.035 1.131 0.924 1.168 1.321 1.162 1.099 1.324 1.324 F1 / F 6.062 6.031 4.968 4.657 7.198 7.169 4.579 4.488 6.303 4.779 F / F2 -0.112 -0.112 -0.056 -0.090 -0.048 -0.035 -0.070 -0.076 0.014 0.014 R3 / R4 0.657 0.658 0.742 0.691 0.753 0.750 0.712 0.709 0.869 0.869 R5 / R6 -0.222 -0.222 -0.219 -0.219 -0.114 -0.231 -0.597 -1.116 -0.219 -0.266 R3 / (R4+d2) 0.896 0.898 0.993 0.848 1.071 1.174 0.926 0.900 1.163 1.163 d10 / TTL 0.082 0.082 0.083 0.083 0.079 0.110 0.009 0.008 0.083 0.083 arctan(SAG7 / D7) -0.108 -0.108 -0.080 -0.080 -0.100 -0.102 -0.059 -0.081 -0.082 -0.077 TL / d5 -16.189 -16.189 -23.822 -23.822 -17.266 -17.881 -24.247 -40.950 -23.822 -26.242 |R7 / R8| 0.049 0.049 0.303 0.303 0.143 0.059 0.780 0.637 0.303 0.303 1 / (1 / R3-1 / R4) -52.942 -52.689 -83.911 -89.028 -85.496 -69.484 -64.013 -68.965 -193.747 -193.747

[0313] Table 11

[0314] Table 12 gives the total track length F of the optical lens of examples one to ten, the effective focal length F1 to F6 of each lens, etc. (unit: millimeter).

[0315]

[0316]

[0317] Table 12

[0318] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor should fall within the protection scope of the present application.

[0319] It is to be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0320] It should be noted that the terms "first", "second", and the like, herein do not necessarily have an ordinal meaning. Rather, such terms are used to distinguish a like feature from another feature in the specification. It should be understood that like reference numerals are used throughout the disclosure to indicate like elements, features or steps unless otherwise noted.

[0321] The preferred embodiments of the application are described above in detail. The application, however, is not limited to the precise embodiments described, and obviously many modifications and changes can be made by one skilled in the art without departing from the spirit and scope of the application. It is intended that all such modifications and changes be included within the scope of the application as described in the foregoing description. The descriptions herein are intended for purposes of illustration only and are not intended to limit the true scope of the present application, which is defined by the claims.

Claims

1. An optical lens characterized in that, From the first side to the second side in order comprises: a first lens with positive refractive power, the first side of the first lens is convex; a second lens with refractive power, the first side of the second lens is concave, and the second side is convex; a third lens with positive refractive power, the first side of the third lens is convex, and the second side is convex; a fourth lens with negative refractive power, the first side of the fourth lens is concave, and the second side is concave; a fifth lens with positive refractive power, the first side of the fifth lens is convex, and the second side is convex; a sixth lens with positive refractive power, the first side of the sixth lens is convex, and the second side is concave; The total number of lenses in the optical lens is six; the optical back focus of the optical lens, that is, the distance from the second side center of the last lens of the optical lens to the center of the imaging surface BFL and the optical total length of the optical lens, that is, the distance from the first side of the first lens to the center of the imaging surface TTL satisfy: BFL / TTL≤0.

091.

2. The optical lens of claim 1, wherein, The second side of the first lens is convex.

3. The optical lens of claim 1, wherein, The second side of the first lens is flat.

4. The optical lens of claim 1, wherein, The second side of the first lens is concave.

5. The optical lens of claim 1, wherein, The second lens has positive refractive power.

6. The optical lens of claim 1, wherein, The second lens has negative refractive power.

7. The optical lens of claim 1, wherein, The optical lens further comprises a diaphragm, which is located between the second lens and the third lens.

8. The optical lens of claim 1, wherein, The third lens and the fourth lens are cemented to form a double-cemented lens.

9. The optical lens of any of claims 1 to 8, wherein, The optical total length of the optical lens, that is, the distance from the first side of the first lens to the center of the imaging surface TTL and the total focal length F of the optical lens satisfy: 3.730≤TTL / F≤5.

8.

10. The optical lens of claim 9, wherein, The optical total length of the optical lens, that is, the distance from the first side of the first lens to the center of the imaging surface TTL and the total focal length F of the optical lens satisfy: 3.730≤TTL / F≤4.

8.

11. The optical lens of any of claims 1 to 8, wherein, The optical total length of the optical lens, that is, the distance from the first side of the first lens to the center of the imaging surface TTL, the actual image height H corresponding to the maximum field of view angle of the optical lens and the maximum field of view angle FOV of the optical lens satisfy: 0.124≤TTL / H / FOV≤1.

12. The optical lens of claim 11, wherein, The optical total length of the optical lens, that is, the distance from the first side of the first lens to the center of the imaging surface TTL, the actual image height H corresponding to the maximum field of view angle of the optical lens and the maximum field of view angle FOV of the optical lens satisfy: 0.124≤TTL / H / FOV≤0.

5.

13. The optical lens of any of claims 1 to 8, wherein, The optical total length of the optical lens, that is, the distance from the first side of the first lens to the center of the imaging surface TTL, the actual image height H corresponding to the maximum field of view angle of the optical lens and the radian value θ of the maximum field of view angle of the optical lens satisfy: 8.490≥TTL / H / θ≥3.

14. The optical lens of claim 13, wherein, The optical total length of the optical lens, that is, the distance from the first side of the first lens to the center of the imaging surface TTL, the actual image height H corresponding to the maximum field of view angle of the optical lens and the radian value θ of the maximum field of view angle of the optical lens satisfy: 8.490≥TTL / H / θ≥5.

15. The optical lens of any of claims 1 to 8, wherein, An optical total length of the optical lens, i.e., a center distance TTL from a first side of the first lens to an imaging surface and a maximum diameter DMAX of lenses of the optical lens satisfy: 1.133≤TTL / DMAX≤5.

16. The optical lens of claim 15, wherein, An optical total length of the optical lens, i.e., a center distance TTL from a first side of the first lens to an imaging surface and a maximum diameter DMAX of lenses of the optical lens satisfy: 1.133≤TTL / DMAX≤2.

5.

17. The optical lens of any of claims 1 to 8, wherein, An entire group focal length F of the optical lens and an actual image height H corresponding to a maximum field of view angle of the optical lens satisfy: 1.504≥F / H≥0.

5.

18. The optical lens of claim 17, wherein, An entire group focal length F of the optical lens and an actual image height H corresponding to a maximum field of view angle of the optical lens satisfy: 1.504≥F / H≥1.

19. The optical lens of any of claims 1 to 8, wherein, An entire group focal length F of the optical lens and an entrance pupil diameter ENPD of the optical lens satisfy: 0.620≤F / ENPD≤2.

20. The optical lens of claim 19, wherein, An entire group focal length F of the optical lens and an entrance pupil diameter ENPD of the optical lens satisfy: 0.620≤F / ENPD≤0.

9.

21. The optical lens of any of claims 1 to 8, wherein, An effective diameter DST of a diaphragm and an entire group focal length F of the optical lens satisfy: 1.384≤DST / F≤3.

22. The optical lens according to claim 21, characterized in that, An effective diameter DST of a diaphragm and an entire group focal length F of the optical lens satisfy: 1.384≤DST / F≤2.

2.

23. The optical lens of any of claims 1 to 8, wherein, An actual image height H corresponding to a maximum field of view angle of the optical lens, an entire group focal length F of the optical lens and an arc value θ of the maximum field of view angle of the optical lens satisfy: 0.891≥(H / 2) / (F*tan(θ / 2))≥0.

001.

24. The optical lens of claim 23, wherein, An actual image height H corresponding to a maximum field of view angle of the optical lens, an entire group focal length F of the optical lens and an arc value θ of the maximum field of view angle of the optical lens satisfy: 0.891≥(H / 2) / (F*tan(θ / 2))≥0.

5.

25. The optical lens of claim 1, wherein, An optical back focus of the optical lens, i.e., a center distance BFL from a second side of a last lens of the optical lens to an imaging surface and an optical total length of the optical lens, i.e., a center distance TTL from a first side of the first lens to the imaging surface satisfy: 0.040≤BFL / TTL≤0.

08.

26. The optical lens of any of claims 1 to 8, wherein, A focal length F6 of the sixth lens and an entire group focal length F of the optical lens satisfy: 0.281≤F6 / F≤3.

4.

27. The optical lens of claim 26, wherein, A focal length F6 of the sixth lens and an entire group focal length F of the optical lens satisfy: 0.281≤F6 / F≤3.

3.

28. The optical lens of any of claims 1 to 8, wherein, A maximum field of view angle FOV of the optical lens, an entire group focal length F of the optical lens and an actual image height H corresponding to the maximum field of view angle of the optical lens satisfy: 69≥(FOV*F) / H≥60.

1.

29. The optical lens of claim 28, wherein, A maximum field of view angle FOV of the optical lens, an entire group focal length F of the optical lens and an actual image height H corresponding to the maximum field of view angle of the optical lens satisfy: 68.2≥(FOV*F) / H≥60.

8.

30. The optical lens of any of claims 1 to 8, wherein, The radius of curvature R3 of the first side surface of the second lens, the radius of curvature R4 of the second side surface of the second lens and the central thickness d3 of the second lens satisfy: 0.87≤R3 / (R4+d3)≤1.

33.

31. The optical lens of claim 30, wherein, The radius of curvature R3 of the first side surface of the second lens, the radius of curvature R4 of the second side surface of the second lens and the central thickness d3 of the second lens satisfy: 0.90≤R3 / (R4+d3)≤1.

33.

32. The optical lens of any of claims 1 to 8, wherein, The focal length F1 of the first lens and the overall focal length F of the optical lens satisfy: 0.5≤F1 / F≤7.

198.

33. The optical lens of claim 32, wherein, The focal length F1 of the first lens and the overall focal length F of the optical lens satisfy: 1≤F1 / F≤7.

198.

34. The optical lens of any of claims 1 to 8, wherein, The overall focal length F of the optical lens and the focal length F2 of the second lens satisfy: -0.5≤F / F2≤0.

014.

35. The optical lens of claim 34, wherein, The overall focal length F of the optical lens and the focal length F2 of the second lens satisfy: -0.2≤F / F2≤0.

014.

36. The optical lens of any of claims 1 to 8, wherein, The radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy: 0.657≤R3 / R4≤3.

37. The optical lens of claim 36, wherein, The radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy: 0.657≤R3 / R4≤2.

38. The optical lens of any of claims 1-8, wherein, The radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy: -1.116≤R5 / R6≤-0.

01.

39. The optical lens of claim 38, wherein, The radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy: -1.116≤R5 / R6≤-0.

08.

40. The optical lens of any of claims 1 to 8, wherein, The radius of curvature R3 of the first side surface of the second lens, the radius of curvature R4 of the second side surface of the second lens and the air gap d2 between the first lens and the second lens satisfy: 0.848≤R3 / (R4+d2)≤2.

41. The optical lens of claim 40, wherein, The radius of curvature R3 of the first side surface of the second lens, the radius of curvature R4 of the second side surface of the second lens and the air gap d2 between the first lens and the second lens satisfy: 0.848≤R3 / (R4+d2)≤1.

5.

42. The optical lens of any of claims 1 to 8, wherein, The air gap d10 between the fifth lens and the sixth lens and the overall optical length of the optical lens, i.e. the center distance TTL from the first side surface of the first lens to the imaging surface, satisfy: 0.008≤d10 / TTL≤2.

43. The optical lens of claim 42, wherein, The air gap d10 between the fifth lens and the sixth lens and the overall optical length of the optical lens, i.e. the center distance TTL from the first side surface of the first lens to the imaging surface, satisfy: 0.008≤d10 / TTL≤1.

5.

44. The optical lens of any of claims 1 to 8, wherein, The sag SAG7 of the first side surface of the fourth lens and the clear aperture D7 of the first side surface of the fourth lens satisfy: -0.108≤arctan(SAG7 / D7)≤-0.

01.

45. The optical lens of claim 44, wherein, An arctan(SAG7 / D7) between a sagittal height SAG7 of the first side of the fourth lens and an entrance pupil diameter D7 of the first side of the fourth lens satisfies -0.108≤arctan(SAG7 / D7)≤-0.

025.

46. The optical lens of any of claims 1 to 8, wherein, A lens group length of the optical lens, i.e., a center distance TL from a first side center of the first lens of the optical lens to a second side center of a last lens of the optical lens and a center thickness d5 of the third lens satisfy -40.950≤TL / d5≤-1.

47. The optical lens of claim 46, wherein, A lens group length of the optical lens, i.e., a center distance TL from a first side center of the first lens of the optical lens to a second side center of a last lens of the optical lens and a center thickness d5 of the third lens satisfy -40.950≤TL / d5≤-10.

48. The optical lens of any of claims 1-8, wherein, A radius of curvature R7 of the first side of the fourth lens and a radius of curvature R8 of the second side of the fourth lens satisfy 0.049≤|R7 / R8|≤1.

5.

49. The optical lens of claim 48, wherein, A radius of curvature R7 of the first side of the fourth lens and a radius of curvature R8 of the second side of the fourth lens satisfy 0.049≤|R7 / R8|≤1.

50. The optical lens of any of claims 1-8, wherein, A radius of curvature R3 of the first side of the second lens and a radius of curvature R4 of the second side of the second lens satisfy -193.747≤1 / (1 / R3-1 / R4)≤-15.

51. The optical lens of claim 50, wherein, A radius of curvature R3 of the first side of the second lens and a radius of curvature R4 of the second side of the second lens satisfy -193.747≤1 / (1 / R3-1 / R4)≤-30.

52. The optical lens of any of claims 1 to 8, wherein, The optical lens satisfies at least one of the following relationships: An optical total length of the optical lens, i.e., a center distance TTL from the first side of the first lens to an imaging surface and a total focal length F of the optical lens satisfy 3.730≤TTL / F≤4.276; An optical total length of the optical lens, i.e., a center distance TTL from the first side of the first lens to an imaging surface, an actual image height H corresponding to a maximum field of view angle of the optical lens and the maximum field of view angle FOV of the optical lens satisfy 0.124≤TTL / H / FOV≤0.148; An optical total length of the optical lens, i.e., a center distance TTL from the first side of the first lens to an imaging surface, an actual image height H corresponding to a maximum field of view angle of the optical lens and an arc value θ of the maximum field of view angle of the optical lens satisfy 8.490≥TTL / H / θ≥7.095; An optical total length of the optical lens, i.e., a center distance TTL from the first side of the first lens to an imaging surface and a maximum diameter DMAX of lenses of the optical lens satisfy 1.133≤TTL / DMAX≤1.804; A total focal length F of the optical lens and an actual image height H corresponding to a maximum field of view angle of the optical lens satisfy 1.504≥F / H≥1.417; An overall focal length F of the optical lens and an entrance pupil diameter ENPD of the optical lens satisfy: 0.620=ENPD=0.9; An effective aperture DST of the diaphragm and an overall focal length F of the optical lens satisfy: 1.384=DST / F=1.817; An actual image height H corresponding to a maximum field angle of the optical lens, an overall focal length F of the optical lens and an radian value θ of the maximum field angle of the optical lens satisfy: 0.891=(H / 2) / (F*tan(θ / 2))=0.839; An optical back focal length of the optical lens, i.e. a distance BFL from a center of a second side of a last lens of the optical lens to a center of an imaging surface, and an optical total length of the optical lens, i.e. a distance TTL from a first side of the first lens to the center of the imaging surface, satisfy: 0.040=BFL / TTL=0.075; A focal length F6 of the sixth lens and an overall focal length F of the optical lens satisfy: 1.250=F6 / F=3.291; A maximum field angle FOV of the optical lens, an overall focal length F of the optical lens and an actual image height H corresponding to the maximum field angle of the optical lens satisfy: 64.984=(FOV*F) / H=61.216; A curvature radius R3 of a first side of the second lens, a curvature radius R4 of a second side of the second lens and a central thickness d3 of the second lens satisfy: 0.924=R3 / (R4+d3)=1.324; A focal length F1 of the first lens and an overall focal length F of the optical lens satisfy: 4.488=F1 / F=7.198; An overall focal length F of the optical lens and a focal length F2 of the second lens satisfy: -0.112=F / F2=0.014; A curvature radius R3 of a first side of the second lens and a curvature radius R4 of a second side of the second lens satisfy: 0.657=R3 / R4=0.869; A curvature radius R5 of a first side of the third lens and a curvature radius R6 of a second side of the third lens satisfy: -1.116=R5 / R6=-0.114; A curvature radius R3 of a first side of the second lens, a curvature radius R4 of a second side of the second lens and an air gap d2 between the first lens and the second lens satisfy: 0.848=R3 / (R4+d2)=1.174; An air gap d10 between the fifth lens and the sixth lens and an optical total length of the optical lens, i.e. a distance TTL from a first side of the first lens to a center of an imaging surface, satisfy: 0.008=d10 / TTL=0.110; A sag SAG7 of a first side of the fourth lens and an effective aperture D7 of the first side of the fourth lens satisfy: -0.108=arctan(SAG7 / D7)= -0.059; The center distance TL between the first side center of the first lens of the optical lens and the second side center of the last lens of the optical lens, i.e. the lens group length of the optical lens, and the center thickness d5 of the third lens satisfy: -40.950≤TL / d5≤-16.189; The radius of curvature R7 of the first side surface of the fourth lens and the radius of curvature R8 of the second side surface of the fourth lens satisfy: 0.049≤|R7 / R8|≤0.780; The radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy: -193.747≤1 / (1 / R3-1 / R4)≤-52.

689.

53. An electronic device, comprising: An imaging device comprising the optical lens according to any one of claims 1 to 52 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images