Optical lens and electronic equipment

Abstract

The invention provides an optical lens and electronic equipment. The optical lens sequentially comprises, from a first side to a second side, a first lens with positive focal power, a second lens with negative focal power and a third lens with positive focal power, the first side surface of the second lens is a concave surface, and the second side surface of the second lens is a convex surface; the first side surface of the third lens is a convex surface, and the second side surface of the third lens is a convex surface; the first side surface of the fourth lens is a concave surface, and the second side surface of the fourth lens is a concave surface; the first side surface of the fifth lens is a convex surface, and the second side surface of the fifth lens is a convex surface; the first side face of the sixth lens is a convex face, and the second side face of the sixth lens is a concave face. According to the invention, the problem that short back focus, high luminous flux and large field angle of an optical lens in the prior art are difficult to consider at the same time is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging devices, and more particularly, to an optical lens and an electronic device. Background Art

[0002] In recent years, with the continuous development and upgrading of intelligent headlights, optical lenses have been more and more widely used in million-pixel headlight applications, such as projection lenses. Currently, as the market requirements for projection lenses are constantly increasing, they are gradually developing towards higher luminous flux, smaller volume, and larger field of view.

[0003] Different from ordinary projection lenses, the projection lenses of intelligent headlights have more special requirements in terms of assisted driving and safety improvement. However, the current optical lenses have various problems. For example, although the current optical lenses can achieve a clarity of one million pixels, aberration problems such as chromatic aberration, astigmatism, and distortion are relatively serious, and the imaging quality is difficult to guarantee. On the other hand, the projection field of view of the current optical lenses is limited and cannot meet a larger projection range. At the same time, a high brightness cannot be guaranteed. Or, on the basis of miniaturization, the aperture of the current optical lenses cannot meet the actual installation and use requirements.

[0004] That is to say, the optical lenses in the prior art have the problem that it is difficult to simultaneously take into account short back focal length, high luminous flux, and large field of view. Summary of the Invention

[0005] The main object of the present invention is to provide an optical lens and an electronic device to solve the problem that the optical lenses in the prior art have difficulty in simultaneously taking into account short back focal length, high luminous flux, and large field of view.

[0006] To achieve the above object, according to one aspect of the present invention, an optical lens is provided, which sequentially includes from the first side to the second side: a first lens with positive optical power, the first side of the first lens being a convex surface; a second lens with optical 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 optical 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 optical 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 optical power, the first side of the fifth lens being a convex surface and the second side being a convex surface; a sixth lens with positive optical 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] Furthermore, the second lens has a positive optical power.

[0011] Furthermore, the second lens has a negative optical power.

[0012] Furthermore, the optical lens further includes a diaphragm, and the diaphragm is located between the second lens and the third lens.

[0013] Furthermore, the third lens and the fourth lens are cemented to form a doublet lens.

[0014] Furthermore, the overall optical length of the optical lens, that is, the distance TTL from the first side of the first lens to the center of the imaging surface, and the overall focal length F of the optical lens satisfy: TTL / F ≤ 5.8.

[0015] Furthermore, the overall optical length of the optical lens, that is, the distance TTL from the first side of the first lens to the center of the imaging surface, and the overall focal length F of the optical lens satisfy: TTL / F ≤ 4.8.

[0016] Furthermore, the overall optical length of the optical lens, that is, the distance TTL from the first side of the first lens to the center of the imaging surface, 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: TTL / H / FOV ≤ 1.

[0017] Furthermore, the overall optical length of the optical lens, that is, the distance TTL from the first side of the first lens to the center of the imaging surface, 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: TTL / H / FOV ≤ 0.5.

[0018] Furthermore, the overall optical length of the optical lens, that is, the distance TTL from the first side of the first lens to the center of the imaging surface, 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: TTL / H / θ ≥ 3.

[0019] Furthermore, the overall optical length of the optical lens, that is, the distance TTL from the first side of the first lens to the center of the imaging surface, 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: TTL / H / θ ≥ 5.

[0020] Furthermore, the overall optical length of the optical lens, that is, the distance TTL from the first side of the first lens to the center of the imaging surface, and the maximum aperture DMAX of the lenses of the optical lens satisfy: TTL / DMAX ≤ 5.

[0021] Further, the total optical 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, and the maximum aperture DMAX of the lenses in the optical lens satisfy: TTL / DMAX ≤ 2.5.

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

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

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

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

[0026] Further, the effective aperture DST of the aperture and the overall focal length F of the optical lens satisfy: DST / F ≤ 3.

[0027] Further, the effective aperture DST of the aperture and the overall focal length F of the optical lens satisfy: DST / F ≤ 2.2.

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

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

[0030] Further, the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging surface, and the total optical 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, the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging surface, and the total optical 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] Furthermore, the focal length F6 of the sixth lens and the overall focal length F of the optical lens satisfy: F6 / F ≤ 3.4.

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

[0034] Furthermore, 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.

[0035] Furthermore, 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: 68.2 ≥ (FOV * F) / H ≥ 60.8.

[0036] Furthermore, 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 central thickness d3 of the second lens satisfy: 0.87 ≤ R3 / (R4 + d3) ≤ 1.33.

[0037] Furthermore, 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 central thickness d3 of the second lens satisfy: 0.90 ≤ R3 / (R4 + d3) ≤ 1.33.

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

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

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

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

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

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

[0044] Furthermore, the curvature radius R5 of the first side of the third lens and the curvature radius R6 of the second side of the third lens satisfy: R5 / R6 ≤ -0.01.

[0045] Furthermore, the curvature radius R5 of the first side of the third lens and the curvature radius R6 of the second side of the third lens satisfy: R5 / R6 ≤ -0.08.

[0046] Furthermore, the curvature radius R3 of the first side of the second lens, the curvature radius R4 of the second side of the second lens, and the air gap d2 between the first lens and the second lens satisfy: R3 / (R4 + d2) ≤ 2.

[0047] Furthermore, the curvature radius R3 of the first side of the second lens, the curvature radius R4 of the second side of the second lens, and the air gap d2 between the first lens and the second lens satisfy: R3 / (R4 + d2) ≤ 1.5.

[0048] Furthermore, the air gap d10 between the fifth lens and the sixth lens and the total optical length of the optical lens, i.e., the central distance TTL from the first side of the first lens to the center of the imaging surface, satisfy: d10 / TTL ≤ 2.

[0049] Furthermore, the air gap d10 between the fifth lens and the sixth lens and the total optical length of the optical lens, i.e., the central distance TTL from the first side of the first lens to the center of the imaging surface, satisfy: d10 / TTL ≤ 1.5.

[0050] Furthermore, 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: arctan(SAG7 / D7) ≤ -0.01.

[0051] Furthermore, 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: arctan(SAG7 / D7) ≤ -0.025.

[0052] Furthermore, the lens group length of the optical lens, i.e., the central distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, and the central thickness d5 of the third lens satisfy: TL / d5 ≤ -1.

[0053] Furthermore, the lens group length of the optical lens, i.e., the central distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, and the central thickness d5 of the third lens satisfy: TL / d5 ≤ -10.

[0054] Furthermore, the following condition is satisfied between 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: |R7 / R8| ≤ 1.5.

[0055] Furthermore, the following condition is satisfied between 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: |R7 / R8| ≤ 1.

[0056] Furthermore, the following condition is satisfied between 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: 1 / (1 / R3 - 1 / R4) ≤ -15.

[0057] Furthermore, the following condition is satisfied between 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: 1 / (1 / R3 - 1 / R4) ≤ -30.

[0058] According to another aspect of the present invention, there is provided an optical lens, which sequentially includes, from the first side to the second side: a first lens having a positive optical power; a second lens having an optical power; a third lens having a positive optical power; a fourth lens having a negative optical power; a fifth lens having a positive optical power; a sixth lens having a positive optical power; the following condition is satisfied between 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: R3 / R4 ≤ 3.

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

[0060] Furthermore, the first side surface of the first lens is a convex surface, and the second side surface is a flat surface.

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

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

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

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

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

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

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

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

[0069] Furthermore, the third lens and the fourth lens are cemented to form a doublet lens.

[0070] Furthermore, the following condition is satisfied between 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: R3 / R4 ≤ 2.

[0071] Furthermore, the following condition is satisfied between the total optical length of the optical lens, i.e., the central distance TTL from the first side surface of the first lens to the imaging surface, and the overall focal length F of the optical lens: TTL / F ≤ 5.8.

[0072] Furthermore, the following condition is satisfied between the total optical length of the optical lens, i.e., the central distance TTL from the first side surface of the first lens to the imaging surface, and the overall focal length F of the optical lens: TTL / F ≤ 4.8.

[0073] Furthermore, the following condition is satisfied among the total optical length of the optical lens, i.e., the central 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 angle of the optical lens, and the maximum field of view angle FOV of the optical lens: TTL / H / FOV ≤ 1.

[0074] Furthermore, the following condition is satisfied among the total optical length of the optical lens, i.e., the central 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 angle of the optical lens, and the maximum field of view angle FOV of the optical lens: TTL / H / FOV ≤ 0.5.

[0075] Furthermore, the following condition is satisfied among the total optical length of the optical lens, i.e., the central 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 angle of the optical lens, and the radian value θ of the maximum field of view angle of the optical lens: TTL / H / θ ≥ 3.

[0076] Furthermore, the following condition is satisfied among the total optical length of the optical lens, i.e., the central 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 angle of the optical lens, and the radian value θ of the maximum field of view angle of the optical lens: TTL / H / θ ≥ 5.

[0077] Furthermore, the following condition is satisfied between the total optical length of the optical lens, i.e., the central distance TTL from the first side surface of the first lens to the imaging surface, and the maximum aperture DMAX of the lenses of the optical lens: TTL / DMAX ≤ 5.

[0078] Furthermore, the following condition is satisfied between the total optical length of the optical lens, i.e., the central distance TTL from the first side surface of the first lens to the imaging surface, and the maximum aperture DMAX of the lenses of the optical lens: TTL / DMAX ≤ 2.5.

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

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

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

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

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

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

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

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

[0087] Furthermore, the back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging surface, and the overall optical 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.

[0088] Furthermore, the back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging surface, and the overall optical 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.

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

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

[0091] Furthermore, 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.

[0092] Furthermore, 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: 68.2 ≥ (FOV * F) / H ≥ 60.8.

[0093] Furthermore, 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 central thickness d3 of the second lens satisfy: 0.87 ≤ R3 / (R4 + d3) ≤ 1.33.

[0094] Furthermore, 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 central thickness d3 of the second lens satisfy: 0.90 ≤ R3 / (R4 + d3) ≤ 1.33.

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

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

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

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

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

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

[0101] Furthermore, 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: R3 / (R4 + d2) ≤ 2.

[0102] 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) ≤ 1.5.

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

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

[0105] Further, 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: arctan(SAG7 / D7) ≤ -0.01.

[0106] Further, 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: arctan(SAG7 / D7) ≤ -0.025.

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

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

[0109] Further, 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: |R7 / R8| ≤ 1.5.

[0110] Further, 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: |R7 / R8| ≤ 1.

[0111] Further, 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.

[0112] Further, the curvature radius R3 of the first side surface of the second lens and the curvature radius 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 invention, there is provided an electronic device, including the above optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0114] Applying the technical solution of the present invention, the optical lens sequentially includes, from the first side to the second side, a first lens with a positive optical power, a second lens with an optical power, a third lens with a positive optical power, a fourth lens with a negative optical power, a fifth lens with a positive optical power, and a sixth lens with a positive optical 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 a positive optical power, converges light rays, adjusts the central light rays and the marginal position light rays of the convergence, improves the system illuminance, and at the same time enables the light ray trend to smoothly transition to the rear, reducing the system sensitivity; the first side surface of the first lens is a convex surface, which is beneficial to the appearance, easy to clean, and not easy to accumulate dust.

[0116] The optical 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 a positive optical power, it is preferably made of a high refractive index material, which is beneficial to deflecting light rays and achieving a larger field of view. At the same time, the focal length of the second lens is relatively large, which is beneficial to the light rays smoothly transitioning to the rear and reducing the sensitivity of the lens; the first side surface of the second lens is a concave surface, which is beneficial to contracting the front-end light rays, making the light rays of each field of view approach parallel to the optical axis in the second lens, resulting in a small light ray deflection and small energy loss. When the second lens has a negative optical power, it further diverges the light rays, adjusts the light ray deflection angle, reduces chromatic aberration, enables the diverging light rays to smoothly enter the rear, and further makes the light ray trend smoothly transition; the first side surface of the second lens is a concave surface that cooperates with the first lens to collect and converge the marginal field of view light rays. The second side surface of the second lens is a convex surface, which adjusts the light ray divergence angle, is beneficial to smoothing the light ray trend, and reduces the sensitivity of the rear optical system. The concentric circle setting of the second lens causes an optical path difference between the peripheral light rays and the central light rays, diverges the central light rays, enters the rear optical system, and reduces the front aperture diameter of the optical lens, reducing the volume, which is beneficial to miniaturization and cost reduction.

[0117] The third lens has a positive optical power and can cooperate with the aperture to further contract the light angle. The first side of the third lens is convex, and the second side is convex. The first side and the second side of the third lens are configured as double convex, which is convenient for the rear optical system to collect the marginal field light, reduce the system aberration, and improve the system illuminance.

[0118] The fourth lens has a negative optical power, diverges the light, adjusts the light angle, and gently transitions the peripheral light, which is beneficial to reducing the lens sensitivity. The first side of the fourth lens is concave, and the second side is concave. The lens surface of the fourth lens is double concave and relatively gentle, which can make the light emitted from the front lens transition smoothly, reduce the deflection degree, and rapidly increase the optical path difference of the marginal field light and the central field light, which is beneficial to correcting the aberration of the marginal field and improving the image quality.

[0119] The fifth lens has a positive optical power and converges the light, which can effectively converge the central light and the marginal light of each field and increase the system illuminance. The first side of the fifth lens is convex, which converges the light and increases the system illuminance. The second side of the fifth lens is convex, which is beneficial to elongating the back focal length and facilitating the assembly of the module and the focal length adjustment.

[0120] The sixth lens has a positive optical power and a gentle lens shape, which enables the light to enter the rear smoothly and the light trend to transition smoothly, which is beneficial to improving the astigmatism and field curvature of the imaging and enhancing the resolution ability of the optical system. The first side of the sixth lens is convex, and the second side is concave, which makes the light have a greater optical path when passing through the sixth lens to reach the imaging surface, which is beneficial to achieving a small CRA.

[0121] This application uses six lenses. By optimizing the settings of the optical power and surface shape of each lens, etc., the optical lens of the present invention has at least one beneficial effect such as a short back focal length, a high light flux, and a large field of view angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0122] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0123] Figure 1 Shows a schematic structural diagram of the optical lens of Example 1 of the present invention;

[0124] Figure 2 Shows a schematic structural diagram of the optical lens of Example 2 of the present invention;

[0125] Figure 3 Shows a schematic structural diagram of the optical lens of Example 3 of the present invention;

[0126] Figure 4 Shows a schematic structural diagram of the optical lens of Example 4 of the present invention;

[0127] Figure 5 Shows a schematic structural diagram of the optical lens according to Example 5 of the present invention;

[0128] Figure 6 Shows a schematic structural diagram of the optical lens according to Example 6 of the present invention;

[0129] Figure 7 Shows a schematic structural diagram of the optical lens according to Example 7 of the present invention;

[0130] Figure 8 Shows a schematic structural diagram of the optical lens according to Example 8 of the present invention;

[0131] Figure 9 Shows a schematic structural diagram of the optical lens according to Example 9 of the present invention;

[0132] Figure 10 Shows a schematic structural diagram of the optical lens according to Example 10 of the present invention.

[0133] Among them, the above-mentioned drawings include the following reference numerals:

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

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

[0136] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as those commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0137] In the present invention, unless otherwise stated, the orientation terms such as "upper, lower, top, bottom" are usually in the direction shown in the drawings, or in the vertical, perpendicular or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner, outer" refer to the inner and outer of the contour of each component itself, but the above orientation terms do not limit the present invention.

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

[0139] In the drawings, for the sake of convenience of illustration, the thickness, size and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0140] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, 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 defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the first side becomes the first side surface of the lens, and the surface of each lens close to the second side is called the second side surface of the lens. The judgment of the surface shape in the paraxial region can be based on the judgment method of those with ordinary knowledge in this field, and the positive and negative of the R value (R refers to the radius of curvature in the paraxial region, usually the R value on the lens database (lens data) in optical software) is used to judge the convexity and concavity. For 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; for 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. The light 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 lidar 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. The light 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 existing optical lenses are difficult to simultaneously achieve short back focus, high luminous flux and large field of view, the present invention provides an optical lens and an electronic device.

[0145] Embodiment 1

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

[0147] The first lens has a positive optical power to converge light rays, adjust the central light rays and the marginal position light rays, improve the system illuminance, and at the same time make the light ray trend transition smoothly to the rear to reduce the system sensitivity; the first side of the first lens is a convex surface, 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 a concave surface, and the second side is a convex surface. When the second lens has a positive optical power, it is preferably made of a high refractive index material, which is beneficial to deflecting light rays and achieving a larger field of view. At the same time, the focal length of the second lens is relatively large, which is beneficial to the smooth transition of light rays to the rear and reduces the sensitivity of the lens; the first side of the second lens is a concave surface, which is beneficial to contracting the front-end light rays, making the light rays of each field of view approach parallel to the optical axis in the trend of the second lens, so that the light ray deflection is small and the energy loss is small. When the second lens has a negative optical power, it further diverges the light rays, adjusts the light ray deflection angle, reduces chromatic aberration, enables the diverging light rays to enter the rear smoothly, and further makes the light ray trend transition smoothly; the first side of the second lens is a concave surface to cooperate with the first lens to collect and converge the marginal field of view light rays, and the second side of the second lens is a convex surface to adjust the light ray divergence angle, which is beneficial to the smooth light ray trend and reduces the sensitivity of the rear optical system. The concentric circle setting of the second lens makes there be an optical path difference between the peripheral light rays and the central light rays, diverges the central light rays, enters the rear optical system, and reduces the front-end aperture of the optical lens, reduces the volume, and is beneficial to miniaturization and cost reduction.

[0149] The third lens has a positive optical power and can cooperate with the diaphragm to further contract the light ray divergence angle. The first side of the third lens is a convex surface, and the second side is a convex surface. The first side and the second side of the third lens are set as double convex, which is convenient for the rear optical system to collect the marginal field of view light rays, reduces the system aberration, and improves the system illuminance.

[0150] The fourth lens has a negative focal power, which diverges light rays, adjusts the light ray angles, and gently transitions the peripheral light rays, facilitating the reduction of lens sensitivity; the first side of the fourth lens is concave, the second side is concave, and the lens surface of the fourth lens is double concave and relatively gentle, enabling the light rays emitted from the front lens to transition smoothly, reducing the degree of deflection, and rapidly increasing the optical path difference between the light rays in the edge field of view and the central field of view, which is conducive to correcting the aberration in the edge field of view and improving the image quality.

[0151] The fifth lens has a positive focal power, which converges light rays, can effectively converge the central light rays and edge light rays of each field of view, and increases the system illuminance; the first side of the fifth lens is convex, converging light rays and increasing the system illuminance, and the second side of the fifth lens is convex, which is conducive to the elongation of the back focal length, facilitating the assembly of the module and the adjustment of the focal length.

[0152] The sixth lens has a positive focal power, and the lens shape is gentle, enabling the light rays to enter the rear smoothly and the light ray trend to transition smoothly, which is conducive to improving the astigmatism and field curvature of the imaging and enhancing the resolution ability of the optical system; the first side of the sixth lens is convex, and the second side is concave, making the light rays have a greater optical path when passing through the sixth lens to reach the imaging surface, which is conducive to achieving a small CRA.

[0153] This application uses six lenses. By optimizing the settings of the focal power and lens surface of each lens, etc., the optical lens of the present invention has at least one beneficial effect such as a short back focal length, a high light flux, and a large field of view angle.

[0154] In this embodiment, the second side of the first lens is convex. Such a setting causes the large-angle light rays in the edge field of view to deflect inward after passing through the first lens, which is conducive to reducing the aperture of the rear-end lens of the system, realizing miniaturization while reducing the lens cost.

[0155] In this embodiment, the second side of the first lens is flat. Such a setting can further smooth the light rays and reduce the sensitivity of the lens.

[0156] In this embodiment, the second side of the first lens is concave. The first lens preferably uses a high-refractive-index material, and the combination with a positive focal power is conducive to deflecting light rays and achieving a larger field of view. At the same time, the lens focal length is relatively large, which is conducive to the light rays transitioning smoothly to the rear and reducing the lens sensitivity; the second side of the first lens being concave is conducive to contracting the front-end light rays.

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

[0158] In this embodiment, the second lens has a negative optical power. Such a setting is beneficial for the second lens to further diverge the light, adjust the light deflection angle, reduce chromatic aberration, enable the diverging light to smoothly enter the rear, and further make the light trend transition smoothly.

[0159] In this embodiment, the optical lens further includes a diaphragm, and the diaphragm is located between the second lens and the third lens. Such a setting is beneficial for effectively converging the light 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 this embodiment, the third lens and the fourth lens are cemented to form a doublet lens. By setting the doublet lens, the influence of ghost images on the optical lens can be effectively eliminated, enabling the optical lens to ensure a high resolution while eliminating ghost images. In addition, the air gap between the third lens and the fourth lens can be reduced, reducing the overall length of the system; at the same time, the tolerance sensitivity problems such as tilt / eccentricity generated during the assembly process of the lens unit can be reduced; the light loss caused by reflection between lenses can also be reduced, improving the illuminance; furthermore, the field curvature can be reduced to correct the off-axis aberration of the system.

[0161] In this embodiment, the overall optical length of the optical lens, that is, the distance TTL from the first side of the first lens to the center of the imaging surface and the overall focal length F of the optical lens satisfy: TTL / F ≤ 5.8. Satisfying this conditional formula can effectively limit the length of the optical lens when the focal length is fixed, which is beneficial for realizing the miniaturization of the optical lens. Preferably, TTL / F ≤ 4.8.

[0162] In this embodiment, the overall optical length of the optical lens, that is, the distance TTL from the first side of the first lens to the center of the imaging surface, 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: TTL / H / FOV ≤ 1. Satisfying this conditional formula can effectively limit the length of the optical lens under the condition of the same image height and the same field of view angle, which is beneficial for realizing miniaturization. Preferably, TTL / H / FOV ≤ 0.5.

[0163] In this embodiment, the overall optical length of the optical lens, that is, the distance TTL from the first side of the first lens to the center of the imaging surface, 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: TTL / H / θ ≥ 3. Satisfying this conditional formula can effectively limit the length of the optical lens and realize miniaturization. Preferably, TTL / H / θ ≥ 5.

[0164] In this embodiment, the total optical length of the optical lens, that is, the distance TTL from the first side of the first lens to the center of the imaging surface, and the maximum aperture DMAX of the lenses in the optical lens satisfy: TTL / DMAX ≤ 5. Meeting this conditional formula results in a short TTL under the same imaging surface, enabling miniaturization. Preferably, TTL / DMAX ≤ 2.5.

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

[0166] In this embodiment, the overall focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD ≤ 2. Meeting this conditional formula is beneficial for ensuring a small FNO, increasing the light transmission, having a large entrance pupil diameter, and helping to improve the relative illumination. Preferably, F / ENPD ≤ 0.9.

[0167] In this embodiment, the effective aperture DST of the aperture and the overall focal length F of the optical lens satisfy: DST / F ≤ 3. Meeting this conditional formula ensures a large ratio of the aperture diameter to the focal length, thus ensuring a larger aperture for the optical lens. Preferably, DST / F ≤ 2.2.

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

[0169] In this embodiment, the back focal length of the optical lens, that is, the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging surface, and the total optical length of the optical lens, that is, the distance TTL from the first side of the first lens to the center of the imaging surface, satisfy: BFL / TTL ≤ 0.091. Such a setting is beneficial for meeting the special requirements of the back focal length of the optical lens and can also reserve space for the installation and focusing of optical components to avoid mechanical interference. Preferably, BFL / TTL ≤ 0.08.

[0170] In this 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 a setting ensures that the sixth lens has a short focal length, which helps with light collection and ensures the light transmission. Preferably, 0.181 ≤ F6 / F ≤ 3.4, and more preferably, 0.281 ≤ F6 / F ≤ 3.3.

[0171] In this embodiment, the following relationship holds among 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: 69 ≥ (FOV * F) / H ≥ 60.1. Meeting this conditional expression can simultaneously achieve a long focal length and a large field of view angle; it helps the overall optical lens effect to take into account a large field of view angle and achieve a large angular resolution at the center. Preferably, 68.2 ≥ (FOV * F) / H ≥ 60.8.

[0172] In this embodiment, the following relationship holds among 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: 0.87 ≤ R3 / (R4 + d3) ≤ 1.33. The special lens shape setting (the shape is close to concentric circles) causes an optical path difference between the peripheral light and the central light, diverges the central light, allows it to enter the rear optical system, and reduces the front aperture of the optical lens, thereby reducing the volume, which is beneficial for miniaturization and cost reduction. Preferably, 0.90 ≤ R3 / (R4 + d3) ≤ 1.33.

[0173] In this embodiment, the following relationship holds between the focal length F1 of the first lens and the overall focal length F of the optical lens: 0.5 ≤ F1 / F. By controlling the light path trend of the first lens and the optical lens, the aberration caused by the large-angle light entering through the first lens is reduced, and at the same time, the lens structure in the optical lens is made compact, which is beneficial for miniaturization. Preferably, 1 ≤ F1 / F. More preferably, 1 ≤ F1 / F ≤ 10.

[0174] In this embodiment, the following relationship holds between the overall focal length F of the optical lens and the focal length F2 of the second lens: -0.5 ≤ F / F2. By controlling the ratio of the overall focal length to the focal length of the second lens, the light can enter the optical system smoothly, and at the same time, it is beneficial for light collection, ensuring the light throughput and improving the resolution. Preferably, -0.2 ≤ F / F2. More preferably, -0.2 ≤ F / F2 ≤ 0.2.

[0175] In this embodiment, the following relationship holds between the curvature radius R3 of the first side surface of the second lens and the curvature radius R4 of the second side surface of the second lens: R3 / R4 ≤ 3. The special shape setting of the second lens is beneficial for the smooth transition of the light path trend, reducing the system sensitivity and improving the resolution. Preferably, R3 / R4 ≤ 2.

[0176] In this embodiment, the following relationship holds 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: R5 / R6 ≤ -0.01. The special shape setting of the third lens is beneficial for the smooth transition of the light path trend, reducing the system sensitivity and improving the resolution. Preferably, R5 / R6 ≤ -0.08.

[0177] In this 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 air gap d2 between the first lens and the second lens satisfy: R3 / (R4 + d2) ≤ 2. The special shape setting of the second lens is conducive to the smooth transition of the light trend. Preferably, R3 / (R4 + d2) ≤ 1.5.

[0178] In this embodiment, the air gap d10 between the fifth lens and the sixth lens and the total optical length of the optical lens, that is, the central distance TTL from the first side surface of the first lens to the center of the imaging surface, satisfy: d10 / TTL ≤ 2. A large air gap between the fifth lens and the sixth lens is conducive to reducing the reflection of the lens and achieving the effect of no ghost image; at the same time, an increase in this distance is conducive to reducing the rear port diameter and the smooth transition of light; at the same time, in order to ensure the imaging quality (if the distance is too large, the resolution will decrease), the air gap is controlled within a reasonable range. Preferably, d10 / TTL ≤ 1.5.

[0179] In this embodiment, 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 satisfy: arctan(SAG7 / D7) ≤ -0.01. By controlling the sagittal height and aperture of the first side surface of the fourth lens to control the angle of this surface, the relative position of the pupil image of the secondary reflection ghost image of the first side surface of the fourth lens and the color filter on the focal plane can be changed. By controlling the angle, the pupil image of the ghost image can be made to be far 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 this embodiment, the lens group length of the optical lens, that is, the central distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, and the central thickness d5 of the third lens satisfy: TL / d5 ≤ -1. Satisfying this conditional equation can adjust the proportion of the distance between the third lens and the fourth lens in the total length of the lens group, which helps to improve the assembly yield. Preferably, TL / d5 ≤ -10.

[0181] In this embodiment, the curvature radius R7 of the first side surface of the fourth lens and the curvature radius R8 of the second side surface of the fourth lens satisfy: |R7 / R8| ≤ 1.5. Satisfying this conditional equation is used for the fourth lens to collect more light and increase the light passing ability of the system. Preferably, |R7 / R8| ≤ 1.

[0182] In this embodiment, the curvature radius R3 of the first side of the second lens and the curvature radius R4 of the second side of the second lens satisfy: 1 / (1 / R3 - 1 / R4) ≤ -15. By controlling the R values of the two 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] Embodiment 2

[0184] As Figures 1 to 10 shown, an optical lens is provided, which sequentially includes from the first side to the second side: a first lens with a positive optical power; a second lens with an optical power; a third lens with a positive optical power; a fourth lens with a negative optical power; a fifth lens with a positive optical power; a sixth lens with a positive optical power; the curvature radius R3 of the first side of the second lens and the curvature radius R4 of the second side of the second lens satisfy: R3 / R4 ≤ 3. The special shape setting of the second lens is beneficial to the smooth transition of the light path, reducing the system sensitivity and improving the resolution. Preferably, R3 / R4 ≤ 2.

[0185] In this embodiment, the first side of the first lens is convex and the second side is convex. The first lens has a positive optical power, converges the light, adjusts the central light and the light at the edge position, improves the system illuminance, and at the same time makes the light path transition smoothly 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. The second side of the first lens is convex, so that the large-angle light in the edge field of view is deflected inward after passing through the first lens, which is beneficial to reducing the aperture of the rear lens of the system, achieving miniaturization while reducing the lens cost.

[0186] In this embodiment, the first side of the first lens is convex and the second side is flat. The first side of the first lens is convex, which is beneficial to the appearance, easy to clean, and not easy to accumulate dust. The second side of the first lens is flat, which can further smooth the light and reduce the sensitivity of the lens.

[0187] In this embodiment, the first side of the first lens is convex and the second side is concave. The first side of the first lens is convex, which is beneficial to the appearance, easy to clean, and not easy to accumulate dust. The first lens preferably uses a high refractive index material, and the positive optical power is beneficial to deflect the light and achieve a larger field of view. At the same time, the lens focal length is larger, which is beneficial to the smooth transition of the light to the rear and reduces the lens sensitivity; the second side of the first lens is concave, which is beneficial to contracting the front-end light.

[0188] In this embodiment, the second lens has a positive optical power. The first side of the second lens is concave, and the second side is convex. When having a positive optical power and preferably using a high refractive index material, it is beneficial to bend light rays and achieve a larger field of view. At the same time, the focal length of the second lens is relatively large, which is beneficial for the light rays to transition smoothly to the rear and reduce the sensitivity of the lens; the first side of the second lens is concave, which is beneficial for contracting the front-end light rays, making the light rays in each field of view approach parallel to the optical axis in the second lens, resulting in less light ray deflection and less energy loss.

[0189] In this embodiment, the second lens has a negative optical power. The first side of the second lens is concave, and the second side is convex. The negative optical power can further diverge the light rays, adjust the light ray deflection angle, reduce chromatic aberration, and enable the diverging light rays to enter the rear smoothly, further making the light ray trend transition smoothly; the first side of the second lens is concave to cooperate with the first lens to collect and converge the marginal field light rays. The second side of the second lens is convex to adjust the light ray divergence angle, which is beneficial for smoothing the light ray trend and reducing the sensitivity of the rear optical system. The concentric circle setting of the second lens causes an optical path difference between the peripheral light rays and the central light rays, diverging the central light rays and entering the rear optical system, and reducing the front aperture diameter of the optical lens, reducing the volume, which is beneficial for miniaturization and cost reduction.

[0190] In this embodiment, the first side of the third lens is convex, and the second side is convex. The positive optical power can cooperate with the aperture to further contract the light ray divergence angle. The first side of the third lens is convex, and the second side is convex. The first side and the second side of the third lens are set as double convex, which is convenient for the rear optical system to collect the marginal field light rays, reduce the system aberration, and improve the system illuminance.

[0191] In this embodiment, the first side of the fourth lens is concave, and the second side is concave. The negative optical power diverges the light rays, adjusts the light ray angle, and smoothly transitions the peripheral light rays, which is beneficial for reducing the lens sensitivity; the first side of the fourth lens is concave, and the second side is concave. The lens surface of the fourth lens is double concave and relatively gentle, which can make the light rays emitted from the front lens transition smoothly, reduce the deflection degree, and quickly increase the optical path difference between the marginal field and the central field light rays, which is beneficial for correcting the aberration of the marginal field and improving the image quality.

[0192] In this embodiment, the first side of the fifth lens is convex, and the second side is convex. The positive optical power has a converging effect on the light rays, which can effectively converge the central light rays and the marginal light rays of each field of view and increase the system illuminance; the first side of the fifth lens is convex to converge the light rays and increase the system illuminance. The second side of the fifth lens is convex, which is beneficial for lengthening the back focal length, facilitating the assembly of the module and the adjustment of the focal length.

[0193] In this embodiment, the first side surface of the sixth lens is convex, and the second side surface is concave. It has a positive optical power and a gentle lens shape, enabling light to enter smoothly into the rear, with a smooth transition in the light path, which is beneficial to improving the astigmatism and field curvature of the imaging and enhancing the resolution ability of the optical system; the first side surface of the sixth lens is convex, and the second side surface is concave, such that the light passing through the sixth lens to the imaging surface has a greater optical path, which is beneficial to achieving a small CRA.

[0194] This application uses six lenses. By optimizing the settings of the optical powers and surface shapes of each lens, etc., the optical lens of the present invention has at least one beneficial effect such as a short back focal length, a high light flux, and a large field of view angle.

[0195] In this embodiment, the optical lens further includes a diaphragm, and the diaphragm is located between the second lens and the third lens. Such a setting 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 this embodiment, the third lens and the fourth lens are cemented to form a doublet lens. By setting the doublet lens, the influence of ghost images on the optical lens can be effectively eliminated, enabling the optical lens to ensure a 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, reducing the overall length of the system; at the same time, the tolerance sensitivity problems such as tilt / eccentricity generated during the assembly process of the lens unit can be reduced; the light loss caused by reflection between lenses can also be reduced, improving the illuminance; furthermore, the field curvature can be reduced to correct the off-axis aberration of the system.

[0197] In this embodiment, the overall optical length of the optical lens, that is, the central distance TTL from the first side surface of the first lens to the imaging surface and the overall focal length F of the optical lens satisfy: TTL / F ≤ 5.8. Satisfying this conditional formula can effectively limit the length of the optical lens when the focal length is fixed, which is beneficial to realizing the miniaturization of the optical lens. Preferably, TTL / F ≤ 4.8.

[0198] In this embodiment, the overall optical length of the optical lens, that is, the central 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 angle of the optical lens, and the maximum field of view angle FOV of the optical lens satisfy: TTL / H / FOV ≤ 1. Satisfying this conditional formula can effectively limit the length of the optical lens under the condition of the same image height and the same field of view angle, which is beneficial to realizing miniaturization. Preferably, TTL / H / FOV ≤ 0.5.

[0199] In this embodiment, the total optical length of the optical lens, that is, the distance TTL from the first side of the first lens to the center of the imaging surface, 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: TTL / H / θ≥3. Meeting this conditional expression can effectively limit the length of the optical lens and achieve miniaturization. Preferably, TTL / H / θ≥5.

[0200] In this embodiment, the total optical length of the optical lens, that is, the distance TTL from the first side of the first lens to the center of the imaging surface, and the maximum aperture DMAX of the lenses in the optical lens satisfy: TTL / DMAX≤5. Meeting this conditional expression, with a short TTL under the same imaging surface, miniaturization can be achieved. Preferably, TTL / DMAX≤2.5.

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

[0202] In this embodiment, the overall focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2. Meeting this conditional expression is beneficial to ensuring a small FNO, beneficial to increasing the light transmission amount, and a large entrance pupil diameter helps to improve the relative illumination. Preferably, F / ENPD≤0.9.

[0203] In this embodiment, the effective aperture DST of the aperture and the overall focal length F of the optical lens satisfy: DST / F≤3. Meeting this conditional expression ensures a large ratio of the aperture diameter to the focal length, and thus ensures a larger aperture of the optical lens. Preferably, DST / F≤2.2.

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

[0205] In this embodiment, the back focal length of the optical lens, that is, the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging surface, and the total optical length of the optical lens, that is, the distance TTL from the first side of the first lens to the center of the imaging surface, satisfy: BFL / TTL≤0.091. Such a setting is beneficial to meeting the special requirements of the back focal length of the optical lens and can also reserve space for the installation and focusing of optical elements to avoid mechanical interference. Preferably, BFL / TTL≤0.08.

[0206] In this 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 a setting ensures that the sixth lens has a short focal length, which helps with light collection and ensures the light transmission amount. Preferably, 0.181 ≤ F6 / F ≤ 3.4, and more preferably, 0.281 ≤ F6 / F ≤ 3.3.

[0207] In this 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. Meeting this conditional formula satisfies both long focal length and large field of view; it helps the overall optical lens effect to take into account the large field of view and achieve high resolution at the center large angle. Preferably, 68.2 ≥ (FOV * F) / H ≥ 60.8.

[0208] In this 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 concentric circles) causes an optical path difference between the peripheral light and the central light, diverges the central light, allows it to enter the rear optical system, and reduces the front aperture of the optical lens, reducing the volume, which is beneficial for miniaturization and cost reduction. Preferably, 0.90 ≤ R3 / (R4 + d3) ≤ 1.33.

[0209] In this 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 trends of the first lens and the optical lens, the aberration caused by the large-angle light entering through the first lens is reduced, and at the same time, the lens structure in the optical lens is made compact, which is beneficial for miniaturization. Preferably, 1 ≤ F1 / F. More preferably, 1 ≤ F1 / F ≤ 10.

[0210] In this 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 can enter the optical system smoothly, and at the same time, it is beneficial for light collection, ensuring the light transmission amount and improving the resolution. Preferably, -0.2 ≤ F / F2. More preferably, -0.2 ≤ F / F2 ≤ 0.2.

[0211] In this 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 beneficial for the smooth transition of the light path trend, reducing the system sensitivity and improving the resolution. Preferably, R5 / R6 ≤ -0.08.

[0212] In this 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 air gap d2 between the first lens and the second lens satisfy: R3 / (R4 + d2) ≤ 2. The special shape setting of the second lens is conducive to the smooth transition of the light trend. Preferably, R3 / (R4 + d2) ≤ 1.5.

[0213] In this embodiment, the air gap d10 between the fifth lens and the sixth lens and the total optical length of the optical lens, that is, the central distance TTL from the first side surface of the first lens to the center of the imaging surface, satisfy: d10 / TTL ≤ 2. The large air gap between the fifth lens and the sixth lens is conducive to weakening the reflection of the lens and achieving the effect of no ghost image; at the same time, increasing this distance is conducive to reducing the rear port diameter and the smooth transition of light; at the same time, in order to ensure the imaging quality (if the distance is too large, the resolution will decrease), the air gap is controlled within a reasonable range. Preferably, d10 / TTL ≤ 1.5.

[0214] In this embodiment, 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 satisfy: arctan(SAG7 / D7) ≤ -0.01. By controlling the sagittal height and aperture of the first side surface of the fourth lens to control the opening angle of this surface, the relative position of the pupil image of the secondary reflection ghost image of the first side surface of the fourth lens and the color filter on the focal plane can be changed. By controlling the opening angle, the pupil image of the ghost image can be made to be far 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 this embodiment, the lens group length of the optical lens, that is, the central distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, and the central thickness d5 of the third lens satisfy: TL / d5 ≤ -1. Satisfying this conditional formula can adjust the proportion of the distance between the third lens and the fourth lens in the total length of the lens group, which helps to improve the assembly yield. Preferably, TL / d5 ≤ -10.

[0216] In this embodiment, the curvature radius R7 of the first side surface of the fourth lens and the curvature radius R8 of the second side surface of the fourth lens satisfy: |R7 / R8| ≤ 1.5. Satisfying this conditional formula is used for the fourth lens to collect more light and increase the light passing ability of the system. Preferably, |R7 / R8| ≤ 1.

[0217] In this embodiment, the curvature radius R3 of the first side surface of the second lens and the curvature radius 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, it is beneficial to achieve a large aperture. Preferably, 1 / (1 / R3 - 1 / R4) ≤ -30.

[0218] Optionally, the above optical lens may 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 may employ multiple lenses, such as the six lenses described above. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. When focusing on imaging quality, the number of aspherical lenses can be increased. The characteristic of an aspherical lens is that the curvature continuously changes from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality.

[0220] In an exemplary embodiment, the present solution does not limit the plastic and glass of the lens. If the temperature performance is focused on, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens may all be glass lenses. The optical lens made of glass can suppress the shift of the back focus of the optical lens with temperature changes to improve the system stability. At the same time, using glass material can avoid the blurring of the lens imaging caused by the high and low temperature changes in the use environment, which affects the normal use of the optical lens. For example, an optical lens with a full glass design has a wide temperature range and can maintain stable optical performance within the range of -40°C to 105°C. Specifically, when focusing on resolution quality and reliability, the first lens to the sixth lens may all be glass aspherical lenses. Of course, in application scenarios with lower requirements for temperature stability, the first lens to the sixth lens in the optical lens may also all be made of plastic. Making the optical lens with plastic can effectively reduce the manufacturing cost. Of course, the first lens to the sixth lens in the optical lens can also be made of a combination of plastic and glass.

[0221] The present application also provides an electronic device, including the above optical lens and an imaging element that converts 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 element (CMOS). The electronic device can be an independent 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 should understand that, without departing from the technical solutions claimed in this application, the number of lenses constituting the optical lens can be changed to obtain the various results and advantages described in this specification. 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 further describes, with reference to the accompanying drawings, examples of the specific surface shapes and parameters of the optical lens applicable to the above embodiments.

[0224] It should be noted that any one of Examples 1 to 10 below is applicable to all embodiments of this application.

[0225] Example 1

[0226] As Figure 1 shown, it is a schematic diagram of the optical lens structure of Example 1.

[0227] As Figure 1 shown, the optical lens sequentially includes, 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 surface IMA.

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

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

[0230] Table 1 shows the basic structure parameter table of the optical lens of Example 1, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (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 2

[0234] As Figure 2 shown, it is a schematic diagram of the optical lens structure of Example 2.

[0235] As Figure 2 shown, the optical lens sequentially includes from the first side to the second side: a first lens L1, a second lens L2, a diaphragm STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an imaging surface IMA.

[0236] The first lens L1 has a positive focal power. The first side surface S1 of the first lens is a convex surface, and the second side surface S2 of the first lens is a convex surface. The second lens L2 has a negative focal power. The first side surface S3 of the second lens is a concave surface, and the second side surface S4 of the second lens is a convex surface. The third lens L3 has a positive focal power. The first side surface S5 of the third lens is a convex surface, and the second side surface S6 of the third lens is a convex surface. The fourth lens L4 has a negative focal power. The first side surface S7 of the fourth lens is a concave surface, and the second side surface S8 of the fourth lens is a concave surface. The fifth lens L5 has a positive focal power. The first side surface S9 of the fifth lens is a convex surface, and the second side surface S10 of the fifth lens is a convex surface. The sixth lens L6 has a positive focal power. The first side surface S11 of the sixth lens is a convex surface, and the second side surface S12 of the sixth lens is a concave surface.

[0237] In this example, the overall 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 overall optical length TTL of the optical lens is 56.916 mm.

[0238] Table 2 shows the basic structure parameter table of the optical lens of Example 2, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm).

[0239]

[0240]

[0241] Table 2

[0242] Example 3

[0243] As Figure 3 shown, it is a schematic diagram of the optical lens structure of Example 3.

[0244] As Figure 3 shown, the optical lens sequentially includes from the first side to the second side: a first lens L1, a second lens L2, a diaphragm STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an imaging surface IMA.

[0245] The first lens L1 has a positive focal power. The first side S1 of the first lens is convex, and the second side S2 of the first lens is flat. The second lens L2 has a negative focal 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 a positive focal 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 a negative focal 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 a positive focal 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 a positive focal power. The first side S11 of the sixth lens is convex, and the second side S12 of the sixth lens is concave.

[0246] In this example, the overall focal length F of the optical lens is 14.320 mm, the maximum field of view FOV of the optical lens is 43.200°, and the overall optical length TTL of the optical lens is 56.057 mm.

[0247] Table 3 shows the basic structural parameter table of the optical lens in Example 3, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm).

[0248]

[0249]

[0250] Table 3

[0251] Example 4

[0252] As Figure 4 shown, it is a schematic diagram of the optical lens structure in Example 4.

[0253] As Figure 4 shown, the optical lens sequentially includes, from the first side to the second side: the first lens L1, the second lens L2, the aperture STO, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the imaging surface IMA.

[0254] The first lens L1 has a positive focal power. The first side S1 of the first lens is convex, and the second side S2 of the first lens is flat. The second lens L2 has a negative focal 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 a positive focal 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 a negative focal 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 a positive focal 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 a positive focal power. The first side S11 of the sixth lens is convex, and the second side S12 of the sixth lens is concave.

[0255] In this example, the overall focal length F of the optical lens is 15.030 mm, the maximum field of view FOV of the optical lens is 43.200°, and the overall optical length TTL of the optical lens is 56.057 mm.

[0256] Table 4 shows the basic structural parameter table of the optical lens in Example 4, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (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 5

[0260] As Figure 5 shown, it is a schematic diagram of the optical lens structure in Example 5.

[0261] As Figure 5 shown, the optical lens sequentially includes, from the first side to the second side: the first lens L1, the second lens L2, the aperture STO, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the imaging surface IMA.

[0262] The first lens L1 has a positive focal 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 a negative focal 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 a positive focal 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 a negative focal 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 a positive focal 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 a positive focal 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 overall focal length F of the optical lens is 14.103 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 58.557 mm.

[0264] Table 5 shows the basic structural parameter table of the optical lens in Example 5, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (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 6

[0268] As Figure 6 shown, it is a schematic diagram of the optical lens structure in Example 6.

[0269] As Figure 6 shown, the optical lens sequentially includes, from the first side to the second side: the first lens L1, the second lens L2, the aperture STO, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the imaging surface IMA.

[0270] The first lens L1 has a positive focal 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 a negative focal 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 a positive focal 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 a negative focal 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 a positive focal 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 a positive focal power. The first side S11 of the sixth lens is convex, and the second side S12 of the sixth lens is concave.

[0271] In this example, the overall focal length F of the optical lens is 14.161 mm, the maximum field of view FOV of the optical lens is 43.200°, and the overall optical length TTL of the optical lens is 60.557 mm.

[0272] Table 6 shows the basic structural parameter table of the optical lens in Example 6. Among them, the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (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 7

[0276] As Figure 7 shown, it is a schematic diagram of the optical lens structure in Example 7.

[0277] As Figure 7 shown, the optical lens sequentially includes, from the first side to the second side: the first lens L1, the second lens L2, the aperture STO, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the imaging surface IMA.

[0278] The first lens L1 has a positive focal 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 a negative focal 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 a positive focal 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 a negative focal 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 a positive focal 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 a positive focal 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 doublet lens.

[0280] In this example, the overall 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 optical length TTL of the optical lens is 56.627 mm.

[0281] Table 7 shows the basic structural parameter table of the optical lens of Example 7, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (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 8

[0285] As Figure 8 shown, it is a schematic diagram of the optical lens structure of Example 8.

[0286] As Figure 8 shown, the optical lens sequentially includes, from the first side to the second side: the first lens L1, the second lens L2, the aperture STO, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the imaging surface IMA.

[0287] The first lens L1 has a positive focal 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 a negative focal 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 a positive focal 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 a negative focal 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 a positive focal 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 a positive focal 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 doublet lens.

[0289] In this example, the overall focal length F of the optical lens is 13.901 mm, the maximum field of view FOV of the optical lens is 43.200°, and the overall optical length TTL of the optical lens is 59.161 mm.

[0290] Table 8 shows the basic structural parameter table of the optical lens of Example 8, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm).

[0291]

[0292]

[0293] Table 8

[0294] Example 9

[0295] As Figure 9 shown, it is a schematic diagram of the optical lens structure of Example 9.

[0296] As Figure 9 shown, the optical lens sequentially includes, from the first side to the second side: the first lens L1, the second lens L2, the aperture STO, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the imaging surface IMA.

[0297] The first lens L1 has a positive focal power. The first side S1 of the first lens is convex, and the second side S2 of the first lens is flat. The second lens L2 has a positive focal 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 a positive focal 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 a negative focal 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 a positive focal 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 a positive focal power. The first side S11 of the sixth lens is convex, and the second side S12 of the sixth lens is concave.

[0298] In this example, the overall focal length F of the optical lens is 14.808 mm, the maximum field of view FOV of the optical lens is 43.200°, and the overall optical length TTL of the optical lens is 56.057 mm.

[0299] Table 9 shows the basic structural parameter table of the optical lens in Example 9, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm).

[0300]

[0301]

[0302] Table 9

[0303] Example ten

[0304] As Figure 10 shown, it is a schematic diagram of the optical lens structure in Example ten.

[0305] As Figure 10 shown, the optical lens sequentially includes, from the first side to the second side: the first lens L1, the second lens L2, the aperture STO, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the imaging surface IMA.

[0306] The first lens L1 has a positive focal power. The first side S1 of the first lens is convex, and the second side S2 of the first lens is flat. The second lens L2 has a positive focal 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 a positive focal 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 a negative focal 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 a positive focal 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 a positive focal power. The first side S11 of the sixth lens is convex, and the second side S12 of the sixth lens is concave.

[0307] In this example, the overall focal length F of the optical lens is 15.051 mm, the maximum field of view FOV of the optical lens is 43.200°, and the overall optical length TTL of the optical lens is 56.257 mm.

[0308] Table 10 shows the basic structural parameter table of the optical lens in Example Ten. Among them, the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (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 respectively satisfy the relationships shown in Table 11.

[0312] Conditional / 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 overall focal length F of the optical lenses in Examples One to Ten, the effective focal lengths 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 invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0319] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0320] It should be noted that the terms "first", "second", etc. in the specification, claims and above-mentioned drawings of the present application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein.

[0321] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An optical lens, characterized in that, sequentially includes from the first side to the second side: a first lens with positive optical power, the first side surface of the first lens being convex; a second lens with optical power, the first side surface of the second lens being concave and the second side surface being convex; a third lens with positive optical power, the first side surface of the third lens being convex and the second side surface being convex; a fourth lens with negative optical power, the first side surface of the fourth lens being concave and the second side surface being concave; a fifth lens with positive optical power, the first side surface of the fifth lens being convex and the second side surface being convex; a sixth lens with positive optical power, the first side surface of the sixth lens being convex and the second side surface being concave.

2. The optical lens according to claim 1, characterized in that, the second side surface of the first lens is convex.

3. The optical lens according to claim 1, characterized in that, the second side surface of the first lens is flat.

4. The optical lens according to claim 1, characterized in that, the second side surface of the first lens is concave.

5. The optical lens according to claim 1, characterized in that, the second lens has positive optical power.

6. The optical lens according to claim 1, characterized in that, the second lens has negative optical power.

7. The optical lens according to claim 1, characterized in that, the optical lens further includes a diaphragm, and the diaphragm is located between the second lens and the third lens.

8. The optical lens according to claim 1, characterized in that, the third lens and the fourth lens are cemented to form a doublet lens.

9. An optical lens, characterized in that, sequentially includes 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; a sixth lens with positive optical power; a relationship between 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 satisfies: R3 / R4 ≤ 3.

10. An electronic device, characterized in that, includes the optical lens according to any one of claims 1 to 9 and an imaging element for converting the optical image formed by the optical lens into an electrical signal.

Images