Optical lens and electronic device

Abstract

The application discloses an optical lens and an electronic device comprising the same. The optical lens comprises, in order from the object side to the image side along the optical axis, a first lens with negative refractive power, the image side of which is concave; a second lens with refractive power, the object side of which is concave and the image side of which is convex; a third lens with positive refractive power, the object side of which is convex; a fourth lens with refractive power; a fifth lens with refractive power; and a sixth lens with refractive power, wherein the maximum field of view FOV of the optical lens, the total effective focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: (FOVxF) / H>70°.

Description

[0001] Divisional application

[0002] This application is a divisional application of the China Invention Patent Application No. 202011268322.6, filed on November 13, 2020, entitled "Optical Lens and Electronic Device", and claiming the priority of the Chinese Patent Application No. 202011268322.6, filed on November 13, 2020. TECHNICAL FIELD

[0003] The present application relates to the field of optical elements, and more particularly, to an optical lens and an electronic device. BACKGROUND

[0004] With the development of automatic driving technology, the vehicle-mounted lens as a key component of the automatic driving auxiliary system plays a crucial role in the safe driving of the automatic driving vehicle. Users have increasingly high requirements for the size, resolution capability and imaging quality of the vehicle-mounted lens. In particular, the vehicle-mounted lens in the automatic driving auxiliary system has special requirements compared with ordinary optical lenses. For example, the vehicle-mounted optical lens requires a small front aperture, strong light transmission capability, and the ability to adapt to changes in light and dark of the external environment. In particular, the automatic driving vehicle has higher requirements for the imaging clarity and ghost image-free of the optical lens. SUMMARY

[0005] In one aspect, the present application provides an optical lens. The optical lens comprises, in order from the object side to the image side along the optical axis: a first lens having negative refractive power, an image side surface of which is concave; a second lens having refractive power, an object side surface of which is concave and an image side surface of which is convex; a third lens having positive refractive power, an object side surface of which is convex; a fourth lens having refractive power; a fifth lens having refractive power; and a sixth lens having refractive power, wherein a maximum field of view FOV of the optical lens, a total effective focal length F of the optical lens, and an image height H corresponding to the maximum field of view of the optical lens satisfy: (FOVxF) / H>70°.

[0006] In one aspect, the present application provides an optical lens. The optical lens comprises, in order from the object side to the image side along the optical axis: a first lens having negative refractive power, an image side surface of which is concave; a second lens having refractive power, an object side surface of which is concave and an image side surface of which is convex; a third lens having positive refractive power, an object side surface of which is convex and an image side surface of which is convex; a fourth lens having refractive power; a fifth lens having refractive power; and a sixth lens having refractive power, wherein a maximum field of view FOV of the optical lens, a maximum light transmission aperture D of the object side surface of the first lens corresponding to the maximum field of view of the optical lens, and an image height H corresponding to the maximum field of view of the optical lens satisfy: D / H / FOV≤0.03.

[0007] In an aspect of the application, an optical lens is provided. The optical lens comprises, in order from the object side to the image side along the optical axis, a first lens having negative refractive power, an image side surface of which is concave, a second lens having refractive power, an object side surface of which is concave and an image side surface of which is convex, a third lens having positive refractive power, an object side surface of which is convex and an image side surface of which is convex, a fourth lens having refractive power, a fifth lens having refractive power, and a sixth lens having refractive power, wherein an arc of the maximum field of view angle of the optical lens, a total effective focal length F of the optical lens, and an image height H corresponding to the maximum field of view angle of the optical lens satisfy: (H-F x theta) / (F x theta)≤-0.1.

[0008] In an aspect of the application, an optical lens is provided. The optical lens comprises, in order from the object side to the image side along the optical axis, a first lens having negative refractive power, an image side surface of which is concave, a second lens having refractive power, an object side surface of which is concave and an image side surface of which is convex, a third lens having positive refractive power, an object side surface of which is convex and an image side surface of which is convex, a fourth lens having refractive power, a fifth lens having refractive power, and a sixth lens having refractive power, wherein an arc of the maximum field of view angle of the optical lens, a total effective focal length F of the optical lens, and an image height H corresponding to the maximum field of view angle of the optical lens satisfy: (H-F x theta) / (F x theta)≤-0.1.

[0009] In an aspect of the application, an optical lens is provided. The optical lens comprises, in order from the object side to the image side along the optical axis, a first lens having negative refractive power, an image side surface of which is concave, a second lens having refractive power, an object side surface of which is concave and an image side surface of which is convex, a third lens having positive refractive power, an object side surface of which is convex and an image side surface of which is convex, a fourth lens having refractive power, a fifth lens having refractive power, and a sixth lens having refractive power, wherein an arc of the maximum field of view angle of the optical lens, a total effective focal length F of the optical lens, and an image height H corresponding to the maximum field of view angle of the optical lens satisfy: (H-F x theta) / (F x theta)≤-0.1.

[0010] In an embodiment, the object side surface of the first lens is convex and the image side surface of the first lens is concave.

[0011] In an embodiment, the object side surface of the first lens is concave and the image side surface of the first lens is concave.

[0012] In an embodiment, the second lens has negative refractive power, the object side surface of the second lens is concave, and the image side surface of the second lens is convex.

[0013] In an embodiment, the second lens has positive refractive power, the object side surface of the second lens is concave, and the image side surface of the second lens is convex.

[0014] In an embodiment, the object side surface of the third lens is convex and the image side surface of the third lens is convex.

[0015] In an embodiment, the fourth lens has positive refractive power, the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is convex.

[0016] In an embodiment, the fourth lens has negative refractive power, the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is concave.

[0017] In an embodiment, the fifth lens has a negative focal power, the object side surface is concave, and the image side surface is convex.

[0018] In an embodiment, the fifth lens has a positive focal power, the object side surface is convex, and the image side surface is convex.

[0019] In an embodiment, the sixth lens has a positive focal power, the object side surface is convex, and the image side surface is concave.

[0020] In an embodiment, the sixth lens has a positive focal power, the object side surface is concave, and the image side surface is convex.

[0021] In an embodiment, the sixth lens has a positive focal power, the object side surface is convex, and the image side surface is convex.

[0022] In an embodiment, the sixth lens has a negative focal power, the object side surface is convex, and the image side surface is concave.

[0023] In an embodiment, the sixth lens has a negative focal power, the object side surface is concave, and the image side surface is convex.

[0024] In an embodiment, the sixth lens has a negative focal power, the object side surface is concave, and the image side surface is concave.

[0025] In an embodiment, the fourth lens and the fifth lens are cemented to form a cemented lens.

[0026] In an embodiment, the sixth lens can have an aspheric mirror surface.

[0027] In an embodiment, a distance TTL on the optical axis from the center of the object side surface of the first lens to the imaging surface of the optical lens and a total effective focal length F of the optical lens can satisfy: TTL / F≤7.

[0028] In an embodiment, a maximum field of view FOV of the optical lens, a distance TTL on the optical axis from the center of the object side surface of the first lens to the imaging surface of the optical lens, and an image height H corresponding to the maximum field of view of the optical lens can satisfy: TTL / H / FOV≤0.05.

[0029] In an embodiment, a distance d8i on the optical axis from the center of the object side surface of the fourth lens to the imaging surface of the optical lens and a distance TTL on the optical axis from the center of the object side surface of the first lens to the imaging surface of the optical lens can satisfy: d8i / TTL≥0.3.

[0030] In an embodiment, a maximum field of view FOV of the optical lens, a maximum entrance pupil diameter D of the object side surface of the first lens corresponding to the maximum field of view of the optical lens, and an image height H corresponding to the maximum field of view of the optical lens can satisfy: D / H / FOV≤0.03.

[0031] In an embodiment, an effective focal length F45 of the cemented lens formed by cementing the fourth lens and the fifth lens and a total effective focal length F of the optical lens can satisfy: 1≤F45 / F≤8.

[0032] In an embodiment, a lens edge slope K2 of the image side surface of the first lens corresponding to the maximum field of view of the optical lens can satisfy: arctan(1 / K2)≥35.

[0033] In an embodiment, a maximum field of view FOV of the optical lens, a total effective focal length F of the optical lens, and an image height H corresponding to the maximum field of view of the optical lens can satisfy: (FOVxF) / H≥70°.

[0034] In an embodiment, a radius of curvature R3 of the object side surface of the second lens, a radius of curvature R4 of the image side surface of the second lens, and a central thickness T2 of the second lens can satisfy: 0.2≤|R4 / (|R3|+T2)|≤1.2.

[0035] In an embodiment, a central thickness Tn1 of an nth1 lens having a maximum central thickness among the second lens to the fourth lens and a central thickness Tm1 of an mth1 lens having a minimum central thickness among the second lens to the fourth lens can satisfy: Tn1 / Tm1≤2, wherein n1 and m1 are selected from 2, 3, and 4.

[0036] In an embodiment, a central thickness Tn2 of an nth2 lens having a maximum central thickness among the second lens, the third lens, and the fifth lens and a central thickness Tm2 of an mth2 lens having a minimum central thickness among the second lens, the third lens, and the fifth lens can satisfy: Tn2 / Tm2≤2, wherein n2 and m2 are selected from 2, 3, and 5.

[0037] In an embodiment, a refractive index Nd1 of the first lens and a refractive index Nd2 of the second lens can satisfy: 0.5≤Nd1 / Nd2≤1.5.

[0038] In an embodiment, an effective focal length F3 of the third lens and an effective focal length F5 of the fifth lens can satisfy: 1.2≤|F3 / F5|≤2.8.

[0039] In an embodiment, an effective focal length F3 of the third lens and an effective focal length F4 of the fourth lens can satisfy: 1≤|F3 / F4|≤3.

[0040] In an embodiment, the effective focal length F3 of the third lens, the effective focal length F4 of the fourth lens, the refractive index temperature coefficient dn / dt(3) of the third lens, and the refractive index temperature coefficient dn / dt(4) of the fourth lens can satisfy: -2x10 6 ≤(F3+F4) / (dn / dt(3)+dn / dt(4))≤-4x10 5 .

[0041] In an embodiment, the effective focal length F3 of the third lens, the effective focal length F5 of the fifth lens, the refractive index temperature coefficient dn / dt(3) of the third lens, and the refractive index temperature coefficient dn / dt(5) of the fifth lens can satisfy: -2x10 6 ≤(F3+F5) / (dn / dt(3)+dn / dt(5))≤-4x10 5 .

[0042] In an embodiment, the radian of the maximum field angle of the optical lens θ, the total effective focal length F of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens can satisfy: (H-Fxθ) / (Fxθ)≤-0.1.

[0043] In an embodiment, the lens edge slope K11 of the object side surface of the sixth lens corresponding to the maximum field angle of the optical lens can satisfy: arctan(1 / K11)≤-4.

[0044] In an embodiment, the aperture value FNO of the optical lens and the total effective focal length F of the optical lens can satisfy: FNO / F≥0.1.

[0045] In an embodiment, the effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens can satisfy: 0.2≤|F4 / F5|≤3.

[0046] In an embodiment, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens can satisfy: 1≤|F3 / F|≤4.

[0047] In an embodiment, the distance BFL on the optical axis from the center of the image side surface of the sixth lens to the imaging surface of the optical lens and the distance TTL on the optical axis from the center of the object side surface of the first lens to the imaging surface of the optical lens can satisfy: BFL / TTL≥0.05.

[0048] In an embodiment, the interval distance d23 on the optical axis from the center of the object side surface of the third lens to the center of the image side surface of the second lens and the distance TTL on the optical axis from the center of the object side surface of the first lens to the imaging surface of the optical lens can satisfy: 0.04≤d23 / TTL≤0.2.

[0049] In an embodiment, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens can satisfy: |F6 / F|≥3.5.

[0050] In an embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens can satisfy: -2.0≤F1 / F≤-1.0.

[0051] In an embodiment, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens can satisfy: |F6 / F|≥3.5.

[0052] In an embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens can satisfy: -2.0≤F1 / F≤-1.0.

[0053] Another aspect of the present application provides an electronic device. The electronic device comprises the optical lens provided by the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0054] The present application adopts six lenses, and by optimizing the shape, optical power, etc. of each lens, the optical lens has at least one of the following beneficial effects: high resolution, miniaturization, no ghost image, low cost, good temperature performance, etc. BRIEF DESCRIPTION OF DRAWINGS

[0055] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:

[0056] Figure 1 FIG. 1 is a schematic diagram showing the structure of an optical lens according to an embodiment of the present application;

[0057] Figure 2 FIG. 2 is a schematic diagram showing the structure of an optical lens according to another embodiment of the present application;

[0058] Figure 3 FIG. 3 is a schematic diagram showing the structure of an optical lens according to another embodiment of the present application;

[0059] Figure 4 FIG. 4 is a schematic diagram showing the structure of an optical lens according to another embodiment of the present application;

[0060] Figure 5 FIG. 5 is a schematic diagram showing the structure of an optical lens according to another embodiment of the present application;

[0061] Figure 6 FIG. 6 is a schematic diagram showing the structure of an optical lens according to another embodiment of the present application;

[0062] Figure 7FIG. 1 shows a schematic diagram of an optical lens according to Embodiment 1 of the present application;

[0063] Figure 8 FIG. 2 shows a schematic diagram of an optical lens according to Embodiment 2 of the present application;

[0064] Figure 9 FIG. 3 shows a schematic diagram of an optical lens according to Embodiment 3 of the present application;

[0065] Figure 10 FIG. 4 shows a schematic diagram of an optical lens according to Embodiment 4 of the present application; and

[0066] Figure 11 FIG. 5 shows a schematic diagram of an optical lens according to Embodiment 5 of the present application. DETAILED DESCRIPTION

[0067] For a better understanding of the present application, various aspects of the present application will be described in more detail below with reference to the accompanying drawings. It is to be understood that the detailed description is merely descriptive of exemplary embodiments of the present application and is not intended to limit the scope of the present application in any way. Throughout the specification, like reference numerals refer to like elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0068] It should be noted that, in the present specification, the expressions first, second, third, etc. are merely used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0069] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shape of the spherical surface or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical surface or aspherical surface is not limited to the shape of the spherical surface or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn strictly to scale.

[0070] In the present specification, the paraxial region refers to a region near the optical axis. If a lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is referred to as the object side surface of the lens, and the surface of each lens closest to the imaging side is referred to as the image side surface of the lens.

[0071] It should also be understood that the use of the terms "have", "has", "having", "include", "includes" and / or "including" when used in this specification, specifies the presence of stated features, elements and / or components, but do not preclude the presence or addition of one or more other features, elements, components and / or groups thereof. Furthermore, when describing the application, the use of "or" means "and / or" unless strictly stated otherwise. Moreover, the use of "a" or "an" means "one or more" unless stated otherwise.

[0072] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an overly literal or overly formal sense unless expressly so defined herein.

[0073] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other, if there is no conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0074] The features, principles, and other aspects of the application are described in detail below.

[0075] In an example embodiment, the optical lens includes, for example, six lenses with optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses are arranged in order along an optical axis from an object side to an image side.

[0076] In an example embodiment, the optical lens can further include a photosensitive element disposed at the imaging plane. Optionally, the photosensitive element disposed at the imaging plane can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor device (CMOS).

[0077] In the exemplary embodiments, the first lens can have a negative focal power. The first lens can have a convex-concave surface type or a concave-concave surface type. The first lens has a negative focal power and a concave image side, which is conducive to collecting as much light as possible in a large field of view into the rear optical system, fixing the direction trend of the large-angle light rays in the edge region, reducing the imaging aberration of the large-angle light rays, and improving the resolution.

[0078] In the exemplary embodiments, the second lens can have a positive focal power or a negative focal power. The second lens can have a concave-convex surface type. Such a focal power and surface type of the second lens is conducive to collecting the light emitted from the first lens, so that the light trend is smoothly transitioned. Preferably, the shape of the second lens can be close to a concentric circular shape, so that there is an optical path difference between the peripheral light and the central light of the optical lens, the central light is diverged, enters the rear optical lens, and is conducive to reducing the front end aperture of the lens, reducing the size of the lens, and realizing miniaturization and reducing the cost.

[0079] In the exemplary embodiments, the third lens can have a positive focal power. The third lens can have a convex-convex surface type. The third lens has a positive focal power, which can converge light, smoothly enter the rear optical lens, is conducive to compressing light, and can further smoothly transition the light trend.

[0080] In the exemplary embodiments, the fourth lens can have a positive focal power or a negative focal power. The fourth lens can have a convex-convex surface type or a convex-concave surface type.

[0081] In the exemplary embodiments, the fifth lens can have a positive focal power or a negative focal power. The fifth lens can have a convex-convex surface type or a concave-convex surface type.

[0082] In the exemplary embodiments, the sixth lens can have a positive focal power or a negative focal power. The sixth lens can have a convex-concave surface type, a concave-convex surface type, a convex-convex surface type, or a concave-concave surface type. Such a focal power and surface type of the sixth lens can smoothly transition the light in the front to the imaging surface of the optical lens, reduce the total optical length, correct the astigmatism and field curvature, and improve the resolution of the optical lens. Preferably, the sixth lens can have an aspherical surface to improve the resolution quality.

[0083] In exemplary embodiments, the optical lens according to the present application can satisfy: TTL / F≤7, where TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, and F is the total effective focal length of the optical lens. More specifically, TTL and F can further satisfy: TTL / F≤6.5. Satisfying TTL / F≤7 is conducive to miniaturization.

[0084] In exemplary embodiments, the optical lens according to the present application can satisfy: TTL / H / FOV≤0.05, where FOV is the maximum field of view angle of the optical lens, TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, and H is the image height corresponding to the maximum field of view angle of the optical lens. More specifically, TTL, H and FOV can further satisfy: TTL / H / FOV≤0.03. Satisfying TTL / H / FOV≤0.05 is conducive to miniaturization.

[0085] In exemplary embodiments, the optical lens according to the present application can satisfy: D / H / FOV≤0.03, where FOV is the maximum field of view angle of the optical lens, D is the maximum entrance pupil of the object side surface of the first lens corresponding to the maximum field of view angle of the optical lens, and H is the image height corresponding to the maximum field of view angle of the optical lens. More specifically, D, H and FOV can further satisfy: D / H / FOV≤0.01. Satisfying D / H / FOV≤0.03 is conducive to reducing the front aperture and miniaturization.

[0086] In exemplary embodiments, the optical lens according to the present application can satisfy: 1≤F45 / F≤8, where F45 is the effective focal length of the cemented lens formed by cementing the fourth lens and the fifth lens, and F is the total effective focal length of the optical lens. More specifically, F45 and F can further satisfy: 2≤F45 / F≤6. Satisfying 1≤F45 / F≤8 can control the light ray trend between the third lens and the sixth lens, reduce the aberration caused by the large-angle light ray entering through the third lens, and at the same time, is conducive to making the structure of the optical lens compact and miniaturization.

[0087] In exemplary embodiments, the optical lens according to the present application can satisfy: arctan(1 / K2)≥35, where K2 is the lens edge slope of the image side surface of the first lens corresponding to the maximum field of view angle of the optical lens, and arctan(1 / K2) is the opening angle of the image side surface of the first lens corresponding to the maximum field of view angle of the optical lens. More specifically, K2 can further satisfy: arctan(1 / K2)≥42. Satisfying arctan(1 / K2)≥35 can make the opening angle of the image side surface of the first lens larger, which is conducive to quickly focusing the large-angle peripheral light ray entering through the first lens to improve the imaging quality.

[0088] In exemplary embodiments, the optical lens according to the present application can satisfy: (FOVxF) / H≥70°, wherein FOV is a maximum field of view angle of the optical lens, F is a total effective focal length of the optical lens, and H is an image height corresponding to the maximum field of view angle of the optical lens. More specifically, FOV, F and H can further satisfy: (FOVxF) / H≥75°. Satisfying (FOVxF) / H≥70° is conducive to making the optical lens have both long focal length and large field of view angle characteristics, and helps to improve the imaging effect of the optical lens while also taking into account large field of view angle, achieving large angle resolution.

[0089] In exemplary embodiments, the optical lens according to the present application can satisfy: d8i / TTL≥0.3, wherein d8i is a distance on the optical axis from the center of the object side surface of the fourth lens to the imaging surface of the optical lens, and TTL is a distance on the optical axis from the center of the object side surface of the first lens to the imaging surface of the optical lens. More specifically, d8i and TTL can further satisfy: d8i / TTL≥0.4. Satisfying d8i / TTL≥0.3 is conducive to eliminating ghost images.

[0090] In exemplary embodiments, the optical lens according to the present application can satisfy: 0.2≤|R4 / (|R3|+T2)|≤1.2, wherein R3 is the radius of curvature of the object side surface of the second lens, R4 is the radius of curvature of the image side surface of the second lens, and T2 is the center thickness of the second lens. More specifically, R4, R3 and T2 can further satisfy: 0.4≤|R4 / (|R3|+T2)|≤1. Satisfying 0.2≤|R4 / (|R3|+T2)|≤1.2 is conducive to making the shape of the second lens close to a concentric circular shape, which can cause the peripheral light rays of the optical lens to have a difference in optical path length from the central light rays, diverge the central light rays, enter the rear optical lens, and also be conducive to reducing the front aperture of the lens, reducing the volume of the lens, facilitating miniaturization, and reducing costs.

[0091] In exemplary embodiments, the optical lens according to the present application can satisfy: Tn1 / Tm1≤2, wherein Tn1 is the center thickness of the nth1 lens having the largest center thickness among the second lens to the fourth lens, Tm1 is the center thickness of the mth1 lens having the smallest center thickness among the second lens to the fourth lens, and n1 and m1 are selected from 2, 3, 4. More specifically, Tn1 and Tm1 can further satisfy: Tn1 / Tm1≤1.5. Satisfying Tn1 / Tm1≤2 is conducive to making the center thicknesses of the second lens to the fourth lens close together, which helps to make the light ray trend of the optical lens gentle and the deflection change small, and helps to reduce sensitivity.

[0092] In exemplary embodiments, the optical lens according to the present application can satisfy: Tn2 / Tm2≤2, wherein Tn2 is the center thickness of the nth2 lens having the largest center thickness among the second lens, the third lens and the fifth lens, Tm2 is the center thickness of the m2th lens having the smallest center thickness among the second lens, the third lens and the fifth lens, and n2 and m2 are selected from 2, 3, 5. More specifically, Tn2 and Tm2 can further satisfy: Tn2 / Tm2≤1.7. Satisfying Tn2 / Tm2≤2 is conducive to making the center thicknesses of the second lens, the third lens and the fifth lens close to each other, which helps to make the light ray trend of the optical lens gentle, the deflection change small, and the sensitivity low.

[0093] In exemplary embodiments, the optical lens according to the present application can satisfy: 0.5≤Nd1 / Nd2≤1.5, wherein Nd1 is the refractive index of the first lens, and Nd2 is the refractive index of the second lens. More specifically, Nd1 and Nd2 can further satisfy: 0.9≤Nd1 / Nd2≤1.1. Satisfying 0.5≤Nd1 / Nd2≤1.5 is conducive to making the refractive indices of the first lens and the second lens close to each other, and the first lens and the second lens preferably being high refractive index materials, which can quickly change the direction of the large-angle light rays entering the first lens, is conducive to reducing the front aperture and improving the imaging quality.

[0094] In exemplary embodiments, the optical lens according to the present application can satisfy: 1.2≤|F3 / F5|≤2.8, wherein F3 is the effective focal length of the third lens, and F5 is the effective focal length of the fifth lens. More specifically, F3 and F5 can further satisfy: 1.6≤|F3 / F5|≤2.51. Satisfying 1.2≤|F3 / F5|≤2.8 is conducive to making the light rays transition gently, reducing the aberration caused by the light ray trend being too steep and the angle being too large, and improving the image quality.

[0095] In exemplary embodiments, the optical lens according to the present application can satisfy: 1≤|F3 / F4|≤3, wherein F3 is the effective focal length of the third lens, and F4 is the effective focal length of the fourth lens. More specifically, F3 and F4 can further satisfy: 1.1≤|F3 / F4|≤2.5. Satisfying 1≤|F3 / F4|≤3 is conducive to making the light rays transition gently, reducing the aberration caused by the light ray trend being too steep and the angle being too large, and improving the image quality.

[0096] In exemplary embodiments, the optical lens according to the present application can satisfy: -2×10 6 ≤(F3+F4) / (dn / dt(3)+dn / dt(4))≤-4×10 5Where F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, dn / dt(3) is the refractive index temperature coefficient of the third lens, and dn / dt(4) is the refractive index temperature coefficient of the fourth lens. More specifically, F3, F4, dn / dt(3) and dn / dt(4) can further satisfy: -1×10 6 ≤(F3+F4) / (dn / dt(3)+dn / dt(4))≤-5.7×10 5 Satisfies -2×10 6 ≤(F3+F4) / (dn / dt(3)+dn / dt(4))≤-4×10 5 This helps reduce the refraction of light by the optical lens under high and low temperature conditions, which is beneficial for the optical lens to have better temperature performance.

[0097] In an exemplary embodiment, the optical lens according to this application satisfies: -2×10 6 ≤(F3+F5) / (dn / dt(3)+dn / dt(5))≤-4×10 5 Where F3 is the effective focal length of the third lens, F5 is the effective focal length of the fifth lens, dn / dt(3) is the refractive index temperature coefficient of the third lens, and dn / dt(5) is the refractive index temperature coefficient of the fifth lens. More specifically, F3, F5, dn / dt(3) and dn / dt(5) can further satisfy: -9×10 5 ≤(F3+F5) / (dn / dt(3)+dn / dt(5))≤-4.8×10 5 Satisfies -2×10 6 ≤(F3+F5) / (dn / dt(3)+dn / dt(5))≤-4×10 5 This helps reduce the refraction of light by the optical lens under high and low temperature conditions, which is beneficial for the optical lens to have better temperature performance.

[0098] In an exemplary embodiment, the optical lens according to this application satisfies: (HF×θ) / (F×θ)≤-0.1, where θ is the radian of the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. More specifically, H, F, and θ further satisfy: (HF×θ) / (F×θ)≤-0.2. Satisfying (HF×θ) / (F×θ)≤-0.1 can, while ensuring that the lens field of view and the size of the imaging plane remain unchanged, help to increase the total effective focal length of the lens and highlight the imaging effect of the central area of ​​the lens imaging plane.

[0099] In exemplary embodiments, the optical lens according to the present application can satisfy: arctan(1 / K11)≤-4, where K11 is the lens edge slope of the object side of the sixth lens corresponding to the maximum field angle of the optical lens, and arctan(1 / K11) is the opening angle of the object side of the sixth lens corresponding to the maximum field angle of the optical lens. More specifically, K11 can further satisfy: arctan(1 / K11)≤-6. Satisfying arctan(1 / K11)≤-4 is conducive to making the edge opening angle of the object side of the sixth lens negative, bending towards the object side, and correcting astigmatism and field curvature.

[0100] In exemplary embodiments, the optical lens according to the present application can satisfy: FNO / F≥0.1, where FNO is the aperture value of the optical lens, and F is the total effective focal length of the optical lens. More specifically, FNO and F can further satisfy: FNO / F≥0.28. Satisfying FNO / F≥0.1 is conducive to making the optical lens have a large aperture characteristic.

[0101] In exemplary embodiments, the optical lens according to the present application can satisfy: 0.2≤|F4 / F5|≤3, where F4 is the effective focal length of the fourth lens, and F5 is the effective focal length of the fifth lens. More specifically, F4 and F5 can further satisfy: 0.6≤|F4 / F5|≤2.6. Satisfying 0.2≤|F4 / F5|≤3 is conducive to smooth transition of light rays and correction of chromatic aberration.

[0102] In exemplary embodiments, the optical lens according to the present application can satisfy: 1≤|F3 / F|≤4, where F3 is the effective focal length of the third lens, and F is the total effective focal length of the optical lens. More specifically, F3 and F can further satisfy: 1.7≤|F3 / F|≤3.3. Satisfying 1≤|F3 / F|≤4 is conducive to balancing various aberrations of the optical lens.

[0103] In exemplary embodiments, the optical lens according to the present application can satisfy: BFL / TTL≥0.05, where BFL is the distance from the center of the image side of the sixth lens to the imaging surface of the optical lens on the optical axis, and TTL is the distance from the center of the object side of the first lens to the imaging surface of the optical lens on the optical axis. More specifically, BFL and TTL can further satisfy: BFL / TTL≥0.08. Satisfying BFL / TTL≥0.05 can make the lens structure compact, reduce the sensitivity of the lens to MTF, improve the production yield, and reduce the production cost on the basis of ensuring miniaturization and assembly characteristics.

[0104] In exemplary embodiments, the optical lens according to the present application can satisfy: 0.04≤d23 / TTL≤0.2, where d23 is the interval distance on the optical axis from the center of the image side surface of the second lens to the center of the object side surface of the third lens, and TTL is the distance on the optical axis from the center of the object side surface of the first lens to the imaging surface of the optical lens. More specifically, d23 and TTL can further satisfy: 0.06≤d23 / TTL≤0.11. Satisfying 0.04≤d23 / TTL≤0.2 can make the interval distance between the first lens and the second lens smaller, which is conducive to miniaturization of the lens, reduces the sensitivity of the lens to MTF, and reduces production cost.

[0105] In exemplary embodiments, the optical lens according to the present application can satisfy: |F6 / F|≥3.5, where F6 is the effective focal length of the sixth lens, and F is the total effective focal length of the optical lens. More specifically, F6 and F can further satisfy: |F6 / F|≥4.1. Satisfying |F6 / F|≥3.5 is conducive to improving resolving power to reduce the impact of defocus on the optical lens.

[0106] In exemplary embodiments, the optical lens according to the present application can satisfy: -2.0≤F1 / F≤-1.0, where F1 is the effective focal length of the first lens, and F is the total effective focal length of the optical lens. More specifically, F1 and F can further satisfy: -1.82≤F1 / F≤-1.26. Satisfying -2.0≤F1 / F≤-1.0 is conducive to making more light rays enter the optical lens smoothly, and increasing illumination.

[0107] In exemplary embodiments, the optical lens according to the present application can satisfy: -6.0≤R10 / F≤-1.0, where R10 is the radius of curvature of the image side surface of the fifth lens, and F is the total effective focal length of the optical lens. More specifically, R10 and F can further satisfy: -4.8≤R10 / F≤-1.4. Satisfying -6.0≤R10 / F≤-1.0 can make the image side surface of the fifth lens be a convex surface.

[0108] In exemplary embodiments, the optical lens according to the present application can satisfy: T2 / TTL≥0.15, where T2 is the center thickness of the second lens, and TTL is the distance on the optical axis from the center of the object side surface of the first lens to the imaging surface of the optical lens. More specifically, T2 and TTL can further satisfy: 0.15≤T2 / TTL≤0.3. Satisfying T2 / TTL≥0.15 is conducive to collecting light rays emitted via the first lens, making the light ray trend transition smoothly, reducing the sensitivity of the lens to MTF, and improving resolving power.

[0109] In exemplary embodiments, a diaphragm can be provided between the second lens and the third lens to further improve the imaging quality of the optical lens. The diaphragm is provided between the second lens and the third lens, which is advantageous for increasing the diaphragm aperture, effectively converging the light rays entering the optical lens, reducing the lens aperture, and shortening the total length of the optical lens. In the embodiments of the present application, the diaphragm can be provided near the image side of the second lens or near the object side of the third lens. However, it should be noted that the position of the diaphragm disclosed herein is only an example and not a limitation; in alternative embodiments, the diaphragm can also be provided at other positions as needed. For example, the diaphragm can also be provided between the third lens and the fourth lens to further improve the imaging quality of the optical lens.

[0110] In exemplary embodiments, the optical lens of the present application can also include a filter and / or a protective glass provided between the sixth lens and the imaging surface, as needed, to filter light rays with different wavelengths and prevent damage to the image-side elements (e.g., a chip) of the optical lens.

[0111] As known by those skilled in the art, cemented lenses can be used to minimize or eliminate chromatic aberration. The use of cemented lenses in optical lenses can improve image quality, reduce reflection loss of light energy, thereby achieving high resolution and improving the clarity of lens imaging. In addition, the use of cemented lenses can also simplify the assembly process during lens manufacturing.

[0112] In exemplary embodiments, the fourth lens and the fifth lens can be cemented to form a cemented lens. The fourth lens with a convex object side and a convex image side and the fifth lens with a concave object side and a convex image side, or the fourth lens with a convex object side and a concave image side and the fifth lens with a convex object side and a convex image side, are cemented, which is advantageous for smoothly transitioning the light rays passing through the fourth lens to the rear optical system and reducing the total length of the optical lens. Of course, the fourth lens and the fifth lens can also not be cemented, which is advantageous for improving the resolution.

[0113] The fourth lens and the fifth lens constituting the cemented lens described above are a lens with positive refractive power and a lens with negative refractive power, respectively, wherein the lens with positive refractive power has a lower refractive index and the lens with negative refractive power has a higher refractive index (relative to the lens with positive refractive power). Moreover, the object side and the image side of the cemented lens are both convex. This can further converge the light rays before transitioning to the rear optical system.

[0114] The above-mentioned lens interconnection by means of gluing has at least one of the following advantages: sufficient correction of various aberrations of the optical lens, improvement of resolution, optimization of distortion, CRA and other optical performances under the premise of compact optical lens structure; reduction of light loss caused by interlens reflection; high and low refractive index matching is conducive to the rapid transition of front light, increases the aperture diameter, improves the light flux, and helps to meet the night vision demand; reduces the interval distance between the two lenses, thereby reducing the total length of the system; reduces the assembly components between the lenses, thereby reducing the process and reducing the cost; reduces the tolerance sensitivity problem of the lens unit caused by the inclination and eccentricity in the assembly process, and improves the production yield; the glued lens can have positive refractive power, so that the light can be effectively and smoothly converged after passing through the glued lens, and then the light can be smoothly reached to the imaging surface; reduces the overall weight and cost. Such gluing design shares the overall chromatic aberration correction of the system, effectively corrects the aberration to improve the resolving power, and makes the optical system compact as a whole, meeting the miniaturization requirement.

[0115] In the example embodiment, the sixth lens can be an aspherical lens; the first lens, the second lens, the third lens, the fourth lens and the fifth lens can be spherical lenses. Alternatively, the first lens and the sixth lens can be aspherical lenses; the second lens, the third lens, the fourth lens and the fifth lens can be spherical lenses. Alternatively, the first lens, the second lens and the sixth lens can be aspherical lenses; the third lens, the fourth lens and the fifth lens can be spherical lenses. Alternatively, the second lens, the third lens and the sixth lens can be aspherical lenses; the first lens, the fourth lens and the fifth lens can be spherical lenses. In particular, in order to improve the resolving quality of the optical system, the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens can all be aspherical lenses. The aspherical lens is characterized by continuous change of curvature from the center to the periphery of the lens. Unlike the spherical lens with constant curvature from the center to the periphery, the aspherical lens has better curvature radius characteristics, has the advantages of improving distortion and improving astigmatism. By using the aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality of the lens. The aspherical lens is helpful to correct the system aberration and improve the resolving power.

[0116] The optical lens according to the above-mentioned embodiment of the present application realizes at least one of the beneficial effects of high resolving power (up to more than 8 million pixels), miniaturization, long focal length, large field of view, no ghost image and good imaging quality of the optical system by reasonable setting of the shapes and focal lengths of the lenses, while using only 6 lenses. At the same time, the optical lens also meets the requirements of small lens size, small front aperture, low sensitivity, small influence on the resolving power of the lens at high and low temperatures, wide working range, high production yield. The total effective focal length of the optical lens is relatively long, and the central region has a large angle resolution, which can improve the environmental object recognition degree, and can specifically increase the central part of the detection area.

[0117] The optical lens according to the above-described embodiments of the present application can effectively eliminate the influence of ghost images on the optical lens, so that the optical lens has high resolution quality on the basis of eliminating ghost images. By reasonably matching the optical power and the temperature coefficient, the influence of temperature change on the optical power of the optical lens can be effectively improved, and the stability of the resolving power of the optical lens at different temperatures is further improved. By reasonably selecting the lens material, the light path is smooth, and the sensitivity of the optical lens is reduced.

[0118] In the example embodiments, the first lens to the sixth lens in the optical lens can be made of glass. The optical lens made of glass can suppress the shift of the back focus of the optical lens with temperature change, so as to improve the system stability. At the same time, the use of glass material can avoid the imaging blur of the lens caused by the high and low temperature changes in the use environment, which affects the normal use of the lens. Specifically, when focusing on the resolution quality and reliability, the first lens to the sixth lens can be glass aspherical lenses. Of course, in the application occasions with low temperature stability requirements, the first lens to the sixth lens in the optical lens can also be made of plastic. The optical lens made of plastic can effectively reduce the manufacturing cost.

[0119] However, those skilled in the art should understand that the number of lenses constituting the lens can be changed without departing from the technical solutions claimed by the present application, so as to obtain the various results and advantages described in the specification. For example, although six lenses are described in the embodiments, the optical lens is not limited to including six lenses. If necessary, the optical lens can also include other number of lenses.

[0120] The specific embodiments of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0121] Example 1

[0122] The following refers to Figure 1 The optical lens according to Embodiment 1 of the present application is described. Figure 1 The structure schematic diagram of the optical lens according to Embodiment 1 of the present application is shown.

[0123] As Figure 1 shown, the optical lens includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6.

[0124] The first lens L1 is a convex-concave lens with negative focal power, the object side S1 is a convex surface, and the image side S2 is a concave surface. The second lens L2 is a concave-convex lens with negative focal power, the object side S3 is a concave surface, and the image side S4 is a convex surface. The third lens L3 is a double-convex lens with positive focal power, the object side S6 is a convex surface, and the image side S7 is a convex surface. The fourth lens L4 is a double-convex lens with positive focal power, the object side S8 is a convex surface, and the image side S9 is a convex surface. The fifth lens L5 is a concave-convex lens with negative focal power, the object side S9 is a concave surface, and the image side S10 is a convex surface. The sixth lens L6 is a convex-concave lens with negative focal power, the object side S11 is a convex surface, and the image side S12 is a concave surface. The fourth lens L4 and the fifth lens L5 can be cemented to form a cemented lens.

[0125] The optical lens can further include a stop STO, which can be disposed between the second lens L2 and the third lens L3 to improve the imaging quality. For example, the stop STO can be disposed between the second lens L2 and the third lens L3 at a position close to the image side S4 of the second lens L2.

[0126] Alternatively, the optical lens can further include a filter L7 and / or a protective glass L7' having an object side S13 and an image side S14. The filter L7 and / or the protective glass L7' can be used to correct color deviation and / or protect an image sensor chip IMA located at an imaging surface S15. Light from an object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

[0127] Table 1 shows the radius of curvature R, the thickness T / distance d (it should be understood that the thickness T / distance d in the row of S1 is the central thickness T1 of the first lens L1, the thickness T / distance d in the row of S2 is the interval distance d23 between the image side of the first lens L1 and the object side of the second lens L2, and so on), the refractive index Nd, and the dispersion coefficient Vd of each lens of the optical lens of embodiment 1.

[0128]

[0129]

[0130] Table 1

[0131] In embodiment 1, the first lens L1 and the sixth lens L6 can be aspherical lenses, and the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 can be spherical lenses. The surface type x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0132]

[0133] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for the aspherical mirrors S1, S2, S11 and S12 in Example 1.

[0134] Face No. k A4 A6 A8 A10 A12 A14 A16 S1 -3.1704 7.4997E-04 -7.9448E-04 8.8113E-05 -4.9096E-06 1.4556E-07 -1.8308E-09 / S2 -0.9243 -6.5621E-03 -2.6063E-04 4.6197E-05 1.4470E-05 -2.7975E-06 2.1144E-07 -6.0683E-09 S11 -0.9240 -2.3208E-03 4.1138E-05 -8.9721E-06 -2.3641E-07 2.1322E-07 -1.9688E-08 5.8682E-10 S12 -51.8989 -1.6228E-03 -1.8583E-05 1.2243E-06 1.5610E-07 -1.9680E-09 -1.1862E-10 2.2063E-12

[0135] Table 2

[0136] Example 2

[0137] The following is for reference Figure 2 An optical lens according to Embodiment 2 of this application is described. In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted. Figure 2 A schematic diagram of the structure of an optical lens according to Embodiment 2 of this application is shown.

[0138] like Figure 2 As shown, the optical lens includes, in sequence from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6 along the optical axis.

[0139] The first lens L1 is a convex-concave lens with negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 is a concave-convex lens with negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex. The third lens L3 is a biconvex lens with positive optical power, its object-side surface S6 is convex, and its image-side surface S7 is convex. The fourth lens L4 is a biconvex lens with positive optical power, its object-side surface S8 is convex, and its image-side surface S9 is convex. The fifth lens L5 is a concave-convex lens with negative optical power, its object-side surface S9 is concave, and its image-side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, its object-side surface S11 is convex, and its image-side surface S12 is concave. The fourth lens L4 and the fifth lens L5 can be cemented together to form a cemented lens.

[0140] The optical lens may also include an aperture stop STO, which may be positioned between the second lens L2 and the third lens L3 to improve image quality. For example, the aperture stop STO may be positioned between the second lens L2 and the third lens L3 at a position close to the image side S4 of the second lens L2.

[0141] Optionally, the optical lens can further include a filter L7 and / or a protection glass L7' having an object side S13 and an image side S14. The filter L7 and / or the protection glass L7' can be used to correct chromatic aberration and / or protect the image sensor chip IMA located at the imaging surface S15. Light from an object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

[0142] In the present embodiment, the first lens L1 and the sixth lens L6 can be aspherical lenses, and the second lens L2, the third lens L3, the fourth lens L4 and the fifth lens L5 can be spherical lenses.

[0143] Table 3 shows the radius of curvature R, the thickness T / distance d, the refractive index Ndand the dispersion coefficient Vdof each lens of the optical lens of embodiment 2. Table 4 shows the conic coefficient and the high-order term coefficient of each aspherical surface that can be used in the optical lens of embodiment 2, wherein each aspherical surface can be defined by the formula (1) given in embodiment 1 above.

[0144]

[0145] Table 3

[0146] Face No. k A4 A6 A8 A10 A12 A14 A16 S1 -3.0252 -3.4380E-04 -6.3504E-04 7.7416E-05 -4.4814E-06 1.3407E-07 -1.6527E-09 / S2 -0.9225 -8.5204E-03 -2.5436E-04 4.2431E-05 1.0040E-05 -2.0406E-06 1.3847E-07 -3.1649E-09 S11 6.7045 -2.2124E-03 -3.3276E-05 5.9600E-07 5.0553E-08 4.9668E-09 -5.9603E-11 5.4900E-12 S12 -22.8974 -2.0657E-03 -1.3803E-05 -3.2269E-06 5.6733E-07 -3.6367E-08 -1.3170E-09 -2.1644E-11

[0147] Table 4

[0148] Example 3

[0149] The following refers to Figure 3 An optical lens according to embodiment 3 of the present application is described. Figure 3 A structure schematic diagram of the optical lens according to embodiment 3 of the present application is shown.

[0150] As Figure 3 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 along the optical axis from the object side to the image side.

[0151] The first lens L1 is a convex-concave lens with negative focal power, the object side S1 is a convex surface, and the image side S2 is a concave surface. The second lens L2 is a concave-convex lens with positive focal power, the object side S3 is a concave surface, and the image side S4 is a convex surface. The third lens L3 is a biconvex lens with positive focal power, the object side S6 is a convex surface, and the image side S7 is a convex surface. The fourth lens L4 is a biconvex lens with positive focal power, the object side S8 is a convex surface, and the image side S9 is a convex surface. The fifth lens L5 is a concave-convex lens with negative focal power, the object side S9 is a concave surface, and the image side S10 is a convex surface. The sixth lens L6 is a convex-concave lens with negative focal power, the object side S11 is a convex surface, and the image side S12 is a concave surface. The fourth lens L4 and the fifth lens L5 can be cemented to form a cemented lens.

[0152] The optical lens can further include a stop STO, which can be arranged between the second lens L2 and the third lens L3 to improve the imaging quality. For example, the stop STO can be arranged between the second lens L2 and the third lens L3 at a position close to the image side S4 of the second lens L2.

[0153] Alternatively, the optical lens can further include a filter L7 and / or a protective glass L7' having an object side S13 and an image side S14. The filter L7 and / or the protective glass L7' can be used to correct color deviation and / or protect an image sensor chip IMA located at an imaging surface S15. Light from an object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

[0154] In the present embodiment, the first lens L1 and the sixth lens L6 can be aspherical lenses, and the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 can be spherical lenses.

[0155] Table 5 shows the radius of curvature R, the thickness T / distance d, the refractive index Nd, and the dispersion coefficient Vd of each lens of the optical lens of Embodiment 3. Table 6 shows the conic coefficient and the high-order term coefficient that can be used for each aspherical surface in Embodiment 3, wherein each aspherical surface can be defined by the formula (1) given in Embodiment 1 above.

[0156]

[0157] Table 5

[0158] Face No. k A4 A6 A8 A10 A12 A14 A16 S1 -2.7714 -4.1194E-04 -5.5112E-04 6.1233E-05 -3.3135E-06 9.3891E-08 -1.1041E-09 / S2 -0.8662 -7.5765E-03 4.2000E-04 6.6432E-05 1.7956E-06 -8.0670E-07 5.5181E-08 -1.0879E-09 S11 42.2396 -2.4958E-03 2.7700E-05 -5.3142E-07 1.8533E-07 -9.3191E-09 8.4192E-10 -3.3605E-11 S12 -35.6562 -2.3279E-03 -2.6900E-05 -9.5496E-07 4.1756E-07 -3.1262E-08 1.2763E-09 -2.3454E-11

[0159] Table 6

[0160] Example 4

[0161] The following refers to Figure 4 An optical lens according to Embodiment 4 of the present application is described. Figure 4A structural diagram of an optical lens according to Embodiment 4 of the present application is shown.

[0162] As shown in Figure 4 the optical lens comprises, in sequence from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6.

[0163] The first lens L1 is a convex-concave lens with negative focal power, the object side S1 of which is a convex surface and the image side S2 of which is a concave surface. The second lens L2 is a concave-convex lens with negative focal power, the object side S3 of which is a concave surface and the image side S4 of which is a convex surface. The third lens L3 is a biconvex lens with positive focal power, the object side S6 of which is a convex surface and the image side S7 of which is a convex surface. The fourth lens L4 is a convex-concave lens with negative focal power, the object side S8 of which is a convex surface and the image side S9 of which is a concave surface. The fifth lens L5 is a biconvex lens with positive focal power, the object side S9 of which is a convex surface and the image side S10 of which is a convex surface. The sixth lens L6 is a biconcave lens with negative focal power, the object side S11 of which is a concave surface and the image side S12 of which is a concave surface. The fourth lens L4 and the fifth lens L5 can be cemented together to form a cemented lens.

[0164] The optical lens can further comprise a stop STO, which can be arranged between the second lens L2 and the third lens L3 to improve the imaging quality. For example, the stop STO can be arranged at a position between the second lens L2 and the third lens L3 close to the image side S4 of the second lens L2.

[0165] Alternatively, the optical lens can further comprise a filter L7 and / or a protective glass L7' having an object side S13 and an image side S14. The filter L7 and / or the protective glass L7' can be used to correct color deviation and / or protect an image sensor chip IMA located at an imaging surface S15. Light from an object passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0166] In this embodiment, the first lens L1 and the sixth lens L6 can be aspherical lenses, and the second lens L2, the third lens L3, the fourth lens L4 and the fifth lens L5 can be spherical lenses.

[0167] Table 7 shows the radius of curvature R, the thickness T / distance d, the refractive index Nd and the dispersion coefficient Vd of each lens of the optical lens of Embodiment 4. Table 8 shows the conic coefficient and the high-order term coefficient of each aspherical surface that can be used in Embodiment 4, wherein each aspherical surface can be defined by the formula (1) given in Embodiment 1 above.

[0168]

[0169]

[0170] Table 7

[0171] Face No. k A4 A6 A8 A10 A12 A14 A16 S1 -8.3933 2.9512E-03 -3.5859E-04 2.0008E-05 -6.8328E-07 1.2222E-08 -7.2949E-11 / S2 -1.0264 -4.1463E-05 3.4627E-04 -1.0313E-04 1.3124E-05 -3.0582E-08 -9.5680E-08 5.5215E-09 S11 -100.0000 -7.0230E-03 3.4286E-04 -5.2749E-05 6.2724E-06 -2.9739E-07 9.7134E-09 / S12 -0.7354 -5.8211E-03 7.7404E-06 6.6708E-07 2.6942E-07 -1.2841E-08 3.8521E-10 /

[0172] Table 8

[0173] Example 5

[0174] The following is for reference Figure 5 An optical lens according to Embodiment 5 of this application is described. Figure 5 A schematic diagram of the structure of an optical lens according to Embodiment 5 of this application is shown.

[0175] like Figure 5 As shown, the optical lens includes, in sequence from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6 along the optical axis.

[0176] The first lens L1 is a biconcave lens with negative optical power, its object-side surface S1 is concave, and its image-side surface S2 is concave. The second lens L2 is a concave-convex lens with positive optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex. The third lens L3 is a biconvex lens with positive optical power, its object-side surface S6 is convex, and its image-side surface S7 is convex. The fourth lens L4 is a convex-concave lens with negative optical power, its object-side surface S8 is convex, and its image-side surface S9 is concave. The fifth lens L5 is a biconvex lens with positive optical power, its object-side surface S9 is convex, and its image-side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, its object-side surface S11 is convex, and its image-side surface S12 is concave. The fourth lens L4 and the fifth lens L5 can be cemented together to form a cemented lens.

[0177] The optical lens may also include an aperture stop STO, which may be positioned between the second lens L2 and the third lens L3 to improve image quality. For example, the aperture stop STO may be positioned between the second lens L2 and the third lens L3 at a position close to the image side S4 of the second lens L2.

[0178] Optionally, the optical lens may also include a filter L7 and / or a protective glass L7' having an object-side surface S13 and an image-side surface S14. The filter L7 and / or the protective glass L7' can be used to correct color deviation and / or protect the image sensor chip IMA located at the imaging surface S15. Light from the object passes sequentially through each surface S1 to S14 and is finally imaged onto the imaging surface S15.

[0179] In this embodiment, the first lens L1, the second lens L2, and the sixth lens L6 can be aspherical lenses, and the third lens L3, the fourth lens L4, and the fifth lens L5 can be spherical lenses.

[0180] Table 9 shows the radius of curvature R, thickness T / distance d, refractive index Nd, and dispersion coefficient Vd of each lens in the optical lens of Example 5. Table 10 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 5, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0181]

[0182] Table 9

[0183] Face No. k A4 A6 A8 A10 A12 A14 S1 -15.3377 5.6779E-04 4.3049E-05 -4.7198E-06 1.8551E-07 -2.7856E-09 / S2 -1.8492 2.6494E-03 -6.1590E-05 1.7750E-05 -2.2206E-06 1.3416E-07 / S3 -16.3208 -3.9195E-03 1.1965E-04 -5.3035E-06 1.4400E-07 1.5488E-08 / S4 -0.9462 -3.2260E-04 1.5004E-06 6.2211E-07 -4.4706E-08 3.6441E-10 / S11 32.4364 -3.0199E-03 -1.7490E-04 -2.2185E-05 2.2066E-06 -1.3121E-07 2.9327E-09 S12 8.4486 -5.1205E-03 1.4219E-04 -6.8490E-06 4.3636E-07 -2.6791E-08 6.1174E-10

[0184] Table 10

[0185] Example 6

[0186] The following is for reference Figure 6 An optical lens according to Embodiment 6 of this application is described. Figure 6 A schematic diagram of the structure of an optical lens according to Embodiment 6 of this application is shown.

[0187] like Figure 6 As shown, the optical lens includes, in sequence from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6 along the optical axis.

[0188] The first lens L1 is a biconcave lens with negative optical power, its object-side surface S1 is concave, and its image-side surface S2 is concave. The second lens L2 is a concave-convex lens with negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex. The third lens L3 is a biconvex lens with positive optical power, its object-side surface S6 is convex, and its image-side surface S7 is convex. The fourth lens L4 is a convex-concave lens with negative optical power, its object-side surface S8 is convex, and its image-side surface S9 is concave. The fifth lens L5 is a biconvex lens with positive optical power, its object-side surface S9 is convex, and its image-side surface S10 is convex. The sixth lens L6 is a concave-convex lens with negative optical power, its object-side surface S11 is concave, and its image-side surface S12 is convex. The fourth lens L4 and the fifth lens L5 can be cemented together to form a cemented lens.

[0189] The optical lens may also include an aperture stop STO, which may be positioned between the second lens L2 and the third lens L3 to improve image quality. For example, the aperture stop STO may be positioned between the second lens L2 and the third lens L3 at a position close to the image side S4 of the second lens L2.

[0190] Optionally, the optical lens can further include a filter L7 and / or a protection glass L7' having an object side S13 and an image side S14. The filter L7 and / or the protection glass L7' can be used to correct chromatic aberration and / or protect the image sensor chip IMA located at the imaging surface S15. Light from an object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

[0191] In the present embodiment, the first lens L1 and the sixth lens L6 can be aspherical lenses, and the second lens L2, the third lens L3, the fourth lens L4 and the fifth lens L5 can be spherical lenses.

[0192] Table 11 shows the radius of curvature R, the thickness T / distance d, the refractive index Ndand the dispersion coefficient Vdof each lens of the optical lens of embodiment 6. Table 12 shows the conic coefficient and the high-order term coefficient of each aspherical surface that can be used in the optical lens of embodiment 6, wherein each aspherical surface can be defined by the formula (1) given in embodiment 1 above.

[0193]

[0194] Table 11

[0195] Face No. k A4 A6 A8 A10 A12 A14 S1 -198.9042 1.4715E-03 -2.2507E-04 1.9181E-05 -9.6253E-07 2.6666E-08 -3.1499E-10 S2 0.4017 2.6322E-03 1.4700E-04 -1.0518E-06 2.7418E-06 -2.2299E-07 7.8720E-09 S11 87.3767 -3.2157E-03 -2.8924E-04 9.1790E-05 -1.2611E-05 8.4720E-07 -1.8020E-08 S12 -162.3540 -4.5246E-03 -1.2679E-05 1.5514E-05 -1.4420E-06 5.1453E-08 2.7655E-10

[0196] Table 12

[0197] Example 7

[0198] The following refers to Figure 7 An optical lens according to embodiment 7 of the present application is described. Figure 7 A structure schematic diagram of the optical lens according to embodiment 7 of the present application is shown.

[0199] As Figure 7 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 along the optical axis from the object side to the image side.

[0200] The first lens L1 is a double-concave lens with negative focal power, the object side S1 is a concave surface, and the image side S2 is a concave surface. The second lens L2 is a meniscus lens with positive focal power, the object side S3 is a concave surface, and the image side S4 is a convex surface. The third lens L3 is a double-convex lens with positive focal power, the object side S6 is a convex surface, and the image side S7 is a convex surface. The fourth lens L4 is a convex-concave lens with negative focal power, the object side S8 is a convex surface, and the image side S9 is a concave surface. The fifth lens L5 is a double-convex lens with positive focal power, the object side S9 is a convex surface, and the image side S10 is a convex surface. The sixth lens L6 is a convex-concave lens with positive focal power, the object side S11 is a convex surface, and the image side S12 is a concave surface. The fourth lens L4 and the fifth lens L5 can be cemented to form a cemented lens.

[0201] The optical lens can further include a stop STO, which can be arranged between the second lens L2 and the third lens L3 to improve the imaging quality. For example, the stop STO can be arranged between the second lens L2 and the third lens L3 at a position close to the image side S4 of the second lens L2.

[0202] Alternatively, the optical lens can further include a filter L7 and / or a protective glass L7' having an object side S13 and an image side S14. The filter L7 and / or the protective glass L7' can be used to correct color deviation and / or protect an image sensor chip IMA located at an imaging surface S15. Light from an object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

[0203] In the present embodiment, the first lens L1, the second lens L2, and the sixth lens L6 can be aspherical lenses, and the third lens L3, the fourth lens L4, and the fifth lens L5 can be spherical lenses.

[0204] Table 13 shows the radius of curvature R, the thickness T / distance d, the refractive index Nd, and the dispersion coefficient Vd of each lens of the optical lens of embodiment 7. Table 14 shows the conic coefficient and the high-order term coefficient that can be used for each aspherical surface in embodiment 7, wherein each aspherical surface can be defined by the formula (1) given in embodiment 1 above.

[0205]

[0206] Table 13

[0207] Face No. k A4 A6 A8 A10 A12 S1 -78.7929 -1.7086E-03 2.2152E-04 -1.2834E-05 4.1091E-07 -5.4148E-09 S2 -1.6450 5.8671E-04 -5.4425E-05 4.0754E-05 -4.5292E-06 2.0623E-07 S3 -1.6059 -2.1102E-03 -2.1603E-05 -6.9406E-06 7.8482E-07 -1.5028E-08 S4 0.6516 -4.0241E-05 1.9518E-06 8.1706E-08 4.7985E-09 -2.2795E-10 S11 1.0341 -7.8035E-04 -1.8000E-05 -1.8397E-07 -2.8490E-09 1.9579E-11 S12 6.7367 -1.5571E-03 -3.9319E-05 -1.6091E-07 5.2270E-08 -1.1756E-09

[0208] Table 14

[0209] Example 8

[0210] The following refers to Figure 8 An optical lens according to embodiment 8 of the present application is described. Figure 8A structural diagram of an optical lens according to Embodiment 8 of the present application is shown.

[0211] As shown in Figure 8 the optical lens comprises, in sequence from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6.

[0212] The first lens L1 is a double-concave lens with negative focal power, the object side surface S1 is concave, and the image side surface S2 is concave. The second lens L2 is a meniscus lens with positive focal power, the object side surface S3 is concave, and the image side surface S4 is convex. The third lens L3 is a double-convex lens with positive focal power, the object side surface S6 is convex, and the image side surface S7 is convex. The fourth lens L4 is a meniscus lens with negative focal power, the object side surface S8 is convex, and the image side surface S9 is concave. The fifth lens L5 is a double-convex lens with positive focal power, the object side surface S9 is convex, and the image side surface S10 is convex. The sixth lens L6 is a meniscus lens with positive focal power, the object side surface S11 is convex, and the image side surface S12 is concave. The fourth lens L4 and the fifth lens L5 can be cemented to form a cemented lens.

[0213] The optical lens can further comprise a stop STO, which can be arranged between the second lens L2 and the third lens L3 to improve the imaging quality. For example, the stop STO can be arranged between the second lens L2 and the third lens L3 at a position close to the image side surface S4 of the second lens L2.

[0214] Alternatively, the optical lens can further comprise a filter L7 and / or a protective glass L7' having an object side surface S13 and an image side surface S14. The filter L7 and / or the protective glass L7' can be used to correct color deviation and / or protect an image sensor chip IMA located at an imaging surface S15. Light from an object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

[0215] In this embodiment, the first lens L1, the second lens L2, and the sixth lens L6 can be aspherical lenses, and the third lens L3, the fourth lens L4, and the fifth lens L5 can be spherical lenses.

[0216] Table 15 shows the curvature radius R, the thickness T / distance d, the refractive index Nd, and the dispersion coefficient Vd of each lens of the optical lens of Embodiment 8. Table 16 shows the conic coefficient and the high-order term coefficient that can be used for each aspherical surface in Embodiment 8, wherein each aspherical surface can be defined by the formula (1) given in Embodiment 1 above.

[0217]

[0218]

[0219] Table 15

[0220] Face No. k A4 A6 A8 A10 A12 S1 -82.6330 -2.1419E-03 2.3776E-04 -1.3249E-05 4.1272E-07 -1.4171E-09 S2 -3.5819 1.7700E-03 -1.3263E-04 4.8750E-05 -4.9310E-06 2.0624E-07 S3 -1.4262 -2.1994E-03 -2.0235E-05 -8.1673E-06 8.5492E-07 -1.4975E-08 S4 0.3494 1.2901E-04 8.8864E-06 -2.4915E-07 2.3458E-08 -2.2872E-10 S11 36.6879 -7.6346E-04 -2.8191E-05 5.2104E-07 -3.6088E-08 3.8810E-11 S12 39.6221 -1.2379E-03 -9.1617E-05 2.2907E-06 1.9263E-08 -1.1761E-09

[0221] Table 16

[0222] Example 9

[0223] The following is for reference Figure 9 An optical lens according to Embodiment 9 of this application is described. Figure 9 A schematic diagram of the structure of an optical lens according to Embodiment 9 of this application is shown.

[0224] like Figure 9 As shown, the optical lens includes, in sequence from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6 along the optical axis.

[0225] The first lens L1 is a biconcave lens with negative optical power, its object-side surface S1 is concave, and its image-side surface S2 is concave. The second lens L2 is a concave-convex lens with positive optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex. The third lens L3 is a biconvex lens with positive optical power, its object-side surface S5 is convex, and its image-side surface S6 is convex. The fourth lens L4 is a biconvex lens with positive optical power, its object-side surface S8 is convex, and its image-side surface S9 is convex. The fifth lens L5 is a concave-convex lens with negative optical power, its object-side surface S9 is concave, and its image-side surface S10 is convex. The sixth lens L6 is a convex-concave lens with positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is concave. The fourth lens L4 and the fifth lens L5 can be cemented together to form a cemented lens.

[0226] The optical lens may also include an aperture stop STO, which may be positioned between the third lens L3 and the fourth lens L4 to improve image quality. For example, the aperture stop STO may be positioned between the third lens L3 and the fourth lens L4 near the object side S8 of the fourth lens L4.

[0227] Optionally, the optical lens may also include a filter L7 and / or a protective glass L7' having an object-side surface S13 and an image-side surface S14. The filter L7 and / or the protective glass L7' can be used to correct color deviation and / or protect the image sensor chip IMA located at the imaging surface S15. Light from the object passes sequentially through each surface S1 to S14 and is finally imaged onto the imaging surface S15.

[0228] In this embodiment, the second lens L2, the third lens L3, and the sixth lens L6 can be aspherical lenses, and the first lens L1, the fourth lens L4, and the fifth lens L5 can be spherical lenses.

[0229] Table 17 shows the radius of curvature R, thickness T / distance d, refractive index Nd, and dispersion coefficient Vd of each lens in the optical lens of Example 9. Table 18 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 9, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0230]

[0231] Table 17

[0232] Face No. k A4 A6 A8 A10 A12 A14 A16 S3 2.1446 -1.3895E-03 -1.2895E-05 7.0920E-06 -1.4005E-07 5.4569E-15 5.7808E-19 3.3087E-22 S4 -0.5905 3.1235E-04 2.9977E-05 -3.2432E-07 5.8481E-08 -9.4809E-10 -3.1037E-11 -2.3211E-21 S5 2.4808 1.9211E-04 2.2383E-05 -2.0846E-06 2.0749E-07 -1.2501E-09 9.2822E-11 -1.1382E-12 S6 5.8065 -5.4344E-04 -2.0462E-05 5.2470E-06 -2.8138E-07 2.9250E-09 4.2593E-11 1.5574E-12 S11 100.0000 -2.0284E-03 -5.5268E-05 1.1165E-05 -8.0881E-07 2.2811E-08 -1.2846E-10 9.2090E-12 S12 -100.0000 -2.8317E-03 -1.4488E-05 5.9739E-06 -3.4085E-07 7.1462E-09 2.1056E-11 -3.8502E-13

[0233] Table 18

[0234] Example 10

[0235] The following is for reference Figure 10 An optical lens according to Embodiment 10 of this application is described. Figure 10 A schematic diagram of the structure of an optical lens according to Embodiment 10 of this application is shown.

[0236] like Figure 10 As shown, the optical lens includes, in sequence from the object side to the image side along the optical axis: first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, and sixth lens L6.

[0237] The first lens L1 is a biconcave lens with negative optical power, its object-side surface S1 is concave, and its image-side surface S2 is concave. The second lens L2 is a concave-convex lens with positive optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex. The third lens L3 is a biconvex lens with positive optical power, its object-side surface S5 is convex, and its image-side surface S6 is convex. The fourth lens L4 is a biconvex lens with positive optical power, its object-side surface S8 is convex, and its image-side surface S9 is convex. The fifth lens L5 is a concave-convex lens with negative optical power, its object-side surface S9 is concave, and its image-side surface S10 is convex. The sixth lens L6 is a concave-convex lens with positive optical power, its object-side surface S11 is concave, and its image-side surface S12 is convex. The fourth lens L4 and the fifth lens L5 can be cemented together to form a cemented lens.

[0238] The optical lens may also include an aperture stop STO, which may be positioned between the third lens L3 and the fourth lens L4 to improve image quality. For example, the aperture stop STO may be positioned between the third lens L3 and the fourth lens L4 near the object side S8 of the fourth lens L4.

[0239] Optionally, the optical lens can further include a filter L7 and / or a protection glass L7' having an object side S13 and an image side S14. The filter L7 and / or the protection glass L7' can be used to correct chromatic aberration and / or protect the image sensor chip IMA located at the imaging surface S15. Light from an object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

[0240] In the present embodiment, the second lens L2, the third lens L3 and the sixth lens L6 can be aspherical lenses, and the first lens L1, the fourth lens L4 and the fifth lens L5 can be spherical lenses.

[0241] Table 19 shows the radius of curvature R, the thickness T / distance d, the refractive index Ndand the dispersion coefficient Vdof each lens of the optical lens of embodiment 10. Table 20 shows the conic coefficient and the high-order term coefficient of each aspherical surface that can be used in the optical lens of embodiment 10, wherein each aspherical surface can be defined by the formula (1) given in embodiment 1 above.

[0242]

[0243] Table 19

[0244]

[0245]

[0246] Table 20

[0247] Example 11

[0248] The following refers to Figure 11 An optical lens according to embodiment 11 of the present application is described. Figure 11 A structural schematic diagram of the optical lens according to embodiment 11 of the present application is shown.

[0249] As Figure 11 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 along the optical axis from the object side to the image side.

[0250] The first lens L1 is a double-concave lens with negative focal power, the object side S1 is a concave surface, and the image side S2 is a concave surface. The second lens L2 is a meniscus lens with positive focal power, the object side S3 is a concave surface, and the image side S4 is a convex surface. The third lens L3 is a double-convex lens with positive focal power, the object side S6 is a convex surface, and the image side S7 is a convex surface. The fourth lens L4 is a convex-concave lens with negative focal power, the object side S8 is a convex surface, and the image side S9 is a concave surface. The fifth lens L5 is a double-convex lens with positive focal power, the object side S9 is a convex surface, and the image side S10 is a convex surface. The sixth lens L6 is a double-convex lens with positive focal power, the object side S11 is a convex surface, and the image side S12 is a convex surface. The fourth lens L4 and the fifth lens L5 can be cemented to form a cemented lens.

[0251] The optical lens can further include a stop STO, which can be arranged between the second lens L2 and the third lens L3 to improve the imaging quality. For example, the stop STO can be arranged between the second lens L2 and the third lens L3 at a position close to the object side S6 of the third lens L3.

[0252] Alternatively, the optical lens can further include a filter L7 having an object side S13 and an image side S14. The filter L7 can be used to correct color deviation. The optical lens can further include a protective glass L8 having an object side S15 and an image side S16. The protective glass L8 can be used to protect the image sensor chip IMA located at the imaging surface S17. Light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.

[0253] In the present embodiment, the first lens L1, the second lens L2, and the sixth lens L6 can be aspherical lenses, and the third lens L3, the fourth lens L4, and the fifth lens L5 can be spherical lenses.

[0254] Table 21 shows the radius of curvature R, the thickness T / distance d, the refractive index Nd, and the dispersion coefficient Vd of each lens of the optical lens of embodiment 11. Table 22 shows the conic coefficient and the high-order term coefficient that can be used for each aspherical surface in embodiment 11, wherein each aspherical surface can be defined by the formula (1) given in embodiment 1 above.

[0255]

[0256]

[0257] Table 21

[0258] Face No. k A4 A6 A8 A10 A12 A14 A16 S1 100.0000 -2.2324E-03 2.4548E-04 -1.3712E-05 4.2317E-07 -5.4033E-09 2.4709E-24 8.0991E-30 S2 -2.0904 -1.2495E-04 7.3804E-05 3.3917E-05 -4.4699E-06 2.0623E-07 -3.7445E-29 2.1373E-33 S3 -1.7437 -2.1064E-03 -6.5028E-06 -9.5015E-06 9.2515E-07 -4.4950E-08 1.6295E-29 3.8694E-32 S4 -0.4554 -1.6488E-04 -1.6112E-07 -1.6982E-07 9.3420E-09 2.4709E-24 2.7703E-24 -1.5915E-28 S11 -0.8221 -1.0214E-04 3.7426E-06 -6.7555E-07 1.0646E-08 8.8793E-11 / / S12 -52.0076 -5.9389E-04 3.4949E-06 -2.1297E-06 9.5205E-08 -1.2056E-09 / /

[0259] Table 22

[0260] In summary, Embodiments 1 to 11 satisfy the relationships shown in Table 23-1 and Table 23-2, respectively. In Table 23-1 and Table 23-2, the units of TTL, F, H, D, d8i, F45, F1, F2, F3, F4, F5, F6, BFL, d23, R1, R3, R4, R8, R10, R11, R12, T2, T3, T4, T5 are millimeters (mm), the unit of FOV is degree (°), and the unit of θ is radian (rad).

[0261]

[0262]

[0263]

[0264] Table 23-1

[0265]

[0266]

[0267] Table 23-2

[0268] The present application also provides an electronic device, which can include the optical lens according to the above embodiments of the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The electronic device can be a standalone electronic device such as a distance detection camera, or an imaging module integrated on a distance detection device such as an auxiliary driving system. In addition, the electronic device can also be a standalone imaging device such as a vehicle-mounted camera, or an imaging module integrated on an auxiliary driving system.

[0269] The above description is merely preferred embodiments of the present application and a principle of applied technologies. It should be understood by those skilled in the art that the inventive scope of the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by any combinations of the above technical features or equivalent features without departing from the inventive concept. For example, the technical solutions formed by the mutual replacement of the above features and the technical features disclosed in the present application (but not limited to) with similar functions.

Claims

1. An optical lens characterized in that, sequentially arranged from the object side to the image side along the optical axis include: a first lens with negative refractive power, an image side surface of which is a concave surface; a second lens with refractive power, an object side surface of which is a concave surface and an image side surface of which is a convex surface; a third lens with positive refractive power, an object side surface of which is a convex surface and an image side surface of which is a convex surface; a fourth lens with refractive power, an object side surface of which is a convex surface; a fifth lens with refractive power, an image side surface of which is a convex surface; and a sixth lens with refractive power, wherein the second lens has positive refractive power or negative refractive power, and the fourth lens and the fifth lens have opposite signs of refractive power; the optical lens has six lenses with refractive power; a radius of curvature R10 of the image side surface of the fifth lens and a total effective focal length F of the optical lens satisfy: -2.55≤R10 / F≤-1.0; an effective focal length F45 of a cemented lens formed by cementing the fourth lens and the fifth lens and the total effective focal length F of the optical lens satisfy: 1≤F45 / F≤4.66; a distance BFL from a center of the image side surface of the sixth lens to an imaging surface of the optical lens on the optical axis and a distance TTL from a center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0.12≤BFL / TTL≤0.16; a distance d8i from a center of the object side surface of the fourth lens to the imaging surface of the optical lens on the optical axis and the distance TTL from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0.426≤d8i / TTL≤0.501; an effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens satisfy: 3.5≤|F6 / F|≤1644.90; a radius of curvature R3 of the object side surface of the second lens, a radius of curvature R4 of the image side surface of the second lens, and a central thickness T2 of the second lens satisfy: 0.56≤|R4 / (|R3|+T2)|≤1.

2. The optical lens of claim 1, wherein, the object side surface of the first lens is a convex surface.

3. The optical lens of claim 1, wherein, the object side surface of the first lens is a concave surface.

4. The optical lens of claim 1, wherein, the fourth lens has positive refractive power, and an image side surface of the fourth lens is a convex surface.

5. The optical lens of claim 1, wherein, the fourth lens has negative refractive power, and an image side surface of the fourth lens is a concave surface.

6. The optical lens of claim 1, wherein, the fifth lens has negative refractive power, and an object side surface of the fifth lens is a concave surface.

7. The optical lens of claim 1, wherein, the fifth lens has positive refractive power, and an object side surface of the fifth lens is a convex surface.

8. The optical lens of claim 1, wherein, the sixth lens has positive refractive power, and an object side surface of the sixth lens is a convex surface and an image side surface of the sixth lens is a concave surface.

9. The optical lens of claim 1, wherein, the sixth lens has positive refractive power, and an object side surface of the sixth lens is a concave surface and an image side surface of the sixth lens is a convex surface.

10. The optical lens of claim 1, wherein, the sixth lens has positive refractive power, and an object side surface of the sixth lens is a convex surface and an image side surface of the sixth lens is a convex surface.

11. The optical lens of claim 1, wherein, the sixth lens has negative refractive power, and an object side surface of the sixth lens is a convex surface and an image side surface of the sixth lens is a concave surface.

12. The optical lens of claim 1, wherein, the sixth lens has negative refractive power, and an object side surface of the sixth lens is a concave surface and an image side surface of the sixth lens is a convex surface.

13. The optical lens of claim 1, wherein, the sixth lens has negative refractive power, and an object side surface of the sixth lens is a concave surface and an image side surface of the sixth lens is a concave surface.

14. The optical lens of claim 1, wherein, the fourth lens and the fifth lens are cemented to form a cemented lens.

15. The optical lens of claim 1, wherein, the sixth lens has a non-spherical surface.

16. The optical lens of any of claims 1-15, wherein, A distance TTL on the optical axis from a center of an object side surface of the first lens to an imaging surface of the optical lens satisfies TTL / F≤7.

17. The optical lens of any of claims 1-15, wherein, A maximum field angle FOV of the optical lens, a distance TTL on the optical axis from a center of an object side surface of the first lens to an imaging surface of the optical lens, and an image height H corresponding to the maximum field angle of the optical lens satisfy 0.0254≤TTL / H / FOV×1°≤0.0328.

18. The optical lens of any of claims 1-15, wherein, An effective focal length F45 of a cemented lens formed by cementing the fourth lens and the fifth lens satisfies 2.05≤F45 / F≤4.

66.

19. The optical lens of any of claims 1-15, wherein, A center thickness Tn1 of an nth1 lens having a maximum center thickness among the second lens to the fourth lens and a center thickness Tm1 of an mth1 lens having a minimum center thickness among the second lens to the fourth lens satisfy Tn1 / Tm1≤2, where n1 and m1 are selected from 2, 3, and 4.

20. The optical lens of any of claims 1-15, wherein, A center thickness Tn2 of an nth2 lens having a maximum center thickness among the second lens, the third lens, and the fifth lens and a center thickness Tm2 of an mth2 lens having a minimum center thickness among the second lens, the third lens, and the fifth lens satisfy Tn2 / Tm2≤2, where n2 and m2 are selected from 2, 3, and 5.

21. The optical lens of any of claims 1-15, wherein, A refractive index Nd1 of the first lens and a refractive index Nd2 of the second lens satisfy 0.5≤Nd1 / Nd2≤1.

5.

22. The optical lens of any of claims 1-15, wherein, An effective focal length F3 of the third lens and an effective focal length F5 of the fifth lens satisfy 1.2≤|F3 / F5|≤2.

8.

23. The optical lens of any of claims 1-15, wherein, An effective focal length F3 of the third lens and an effective focal length F4 of the fourth lens satisfy 1≤|F3 / F4|≤3.

24. The optical lens of any of claims 1-15, wherein, An effective focal length F3 of the third lens, an effective focal length F4 of the fourth lens, a refractive index temperature coefficient dn / dt(3) of the third lens, and a refractive index temperature coefficient dn / dt(4) of the fourth lens satisfy: - 2 x 10 6 ≤ (F3 + F4) / (dn / dt(3) + dn / dt(4)) ≤ -4 x 10 5 .

25. The optical lens of any of claims 1-15, wherein, An effective focal length F3 of the third lens, an effective focal length F5 of the fifth lens, a refractive index temperature coefficient dn / dt(3) of the third lens, and a refractive index temperature coefficient dn / dt(5) of the fifth lens satisfy: - 2 x 10 6 ≤ (F3 + F5) / (dn / dt(3) + dn / dt(5)) ≤ -4 x 10 5 .

26. The optical lens of any of claims 1-15, wherein, A lens edge slope K11 of an object side surface of the sixth lens corresponding to the maximum field angle of the optical lens satisfies arctan(1 / K11)≤-4°.

27. The optical lens of any of claims 1-15, wherein, An aperture value FNO of the optical lens satisfies: FNO / F≥0.1 mm -1 .

28. The optical lens of any of claims 1-15, wherein, An effective focal length F4 of the fourth lens and an effective focal length F5 of the fifth lens satisfy 0.2≤|F4 / F5|≤3.

29. The optical lens of any of claims 1-15, wherein, An effective focal length F3 of the third lens and a total effective focal length F of the optical lens satisfy 1≤|F3 / F|≤4.

30. The optical lens of any of claims 1-15, wherein, An interval distance d23 on the optical axis from a center of an image side surface of the second lens to a center of an object side surface of the third lens satisfies 0.04≤d23 / TTL≤0.

2.

31. The optical lens of any of claims 1-15, wherein, An effective focal length F6 of the sixth lens and a total effective focal length F of the optical lens satisfy: 4.29≤|F6 / F|≤1644.

90.

32. The optical lens of any of claims 1-15, wherein, An effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: -2.0≤F1 / F≤-1.

0.

33. The optical lens of any of claims 1-15, wherein, A curvature radius R10 of an image side surface of the fifth lens and the total effective focal length F of the optical lens satisfy: -2.55≤R10 / F≤-1.

28.

34. The optical lens of any of claims 1-15, wherein, A central thickness T2 of the second lens and a distance TTL from a center of the object side surface of the first lens to an imaging surface of the optical lens on the optical axis satisfy: T2 / TTL≥0.

15.

35. The optical lens of any of claims 1-15, wherein, A maximum field angle FOV of the optical lens, a total effective focal length F of the optical lens, and an image height H corresponding to the maximum field angle of the optical lens satisfy: 70°≤(FOV×F) / H≤75.85°.

36. The optical lens of any of claims 1-15, wherein, A maximum field angle FOV of the optical lens, a maximum entrance pupil diameter D of the object side surface of the first lens corresponding to the maximum field angle of the optical lens, and an image height H corresponding to the maximum field angle of the optical lens satisfy: 0.0087≤D / H / FOV×1°≤0.

03.

37. The optical lens of any of claims 1-15, wherein, A lens edge slope K2 of the image side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: 35°≤arctan(1 / K2)≤47.39°.

38. The optical lens of any of claims 1-15, wherein, A radian θ of the maximum field angle of the optical lens, a total effective focal length F of the optical lens, and an image height H corresponding to the maximum field angle of the optical lens satisfy: -0.24≤(H-F×θ) / (F×θ)≤-0.

23.

39. An electronic device, comprising: An optical lens according to any one of claims 1-38 and an imaging element for converting an optical image formed by the optical lens into an electric signal.

Images