Optical lenses and electronic devices

Abstract

The present invention provides an optical lens and an electronic device. The optical lens includes, in order from the object side to the image side along the optical axis: a first lens, the first lens having negative optical power, a first side surface of the first lens being convex, and a second side surface of the first lens being concave; a second lens, the second lens having optical power, a first side surface of the second lens being concave, and a second side surface of the second lens being convex; a third lens, the third lens having positive optical power, a first side surface of the third lens being concave, and a second side surface of the third lens being convex; a fourth lens, the fourth lens having optical power, at least one of the first side surface and the second side surface of the fourth lens being convex; a fifth lens, the fifth lens having optical power; and a sixth lens, the sixth lens having optical power, at least one of the first side surface and the second side surface of the sixth lens being convex. The present invention solves the problem in the prior art that optical lenses have difficulty in achieving high resolution, miniaturization, large angular resolution, and no ghost images at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging equipment, and in particular to an optical lens and electronic equipment. Background Art

[0002] With the advancement of autonomous driving, optical lenses, such as automotive lenses, as key components of automated driving assistance systems, have also seen rapid growth. This has led to increasing demands for high resolution and miniaturization of these lenses. Furthermore, to achieve clear recognition in low-light conditions, automotive lenses also require a larger aperture. To ensure safe driving, automotive lenses must be ghost-free to prevent automated driving assistance systems from misjudging road conditions.

[0003] Due to their unique installation location, automotive lenses used in automated driving assistance systems have more specific requirements than ordinary optical lenses. These include the requirement for high light transmission to accommodate the darker conditions of nighttime or rainy days. To reduce costs and minimize weight, automotive lenses typically use plastic lenses. However, the thermal expansion and contraction characteristics of plastic lenses are difficult to overcome, causing the optimal image plane to deviate from the chip at temperatures between -40°C and 120°C, resulting in undesirable effects such as unclear images. Furthermore, highly plasticized systems have poor thermal stability, and even after returning to room temperature from high temperatures, the resolution cannot meet requirements. Therefore, a design that simultaneously meets these requirements—miniaturization, high resolution, ghosting, and relatively clear imaging at both high and low temperatures—is highly desirable.

[0004] The prior art provides an optical lens with a telephoto characteristic. However, this telephoto lens cannot achieve both wide-angle resolution, suffers from low recognition of surrounding objects, and has a small central detection area. Another prior art optical lens, while capable of achieving megapixel resolution, suffers from significant aberrations such as chromatic aberration, astigmatism, and distortion, resulting in poor resolution. Furthermore, another optical lens cannot simultaneously meet the requirements of a small front-end diameter and miniaturization, making it difficult to meet user needs.

[0005] In other words, the optical lenses in the prior art have the problem of being difficult to achieve high resolution, miniaturization, wide angular resolution and zero ghosting at the same time. Summary of the Invention

[0006] The main purpose of the present invention is to provide an optical lens and an electronic device to solve the problem in the prior art that optical lenses have difficulty in achieving high resolution, miniaturization, large angular resolution and no ghosting at the same time.

[0007] To achieve the above-mentioned object, according to one aspect of the present invention, there is provided an optical lens, comprising, in order from the object side to the image side along the optical axis: a first lens, the first lens having negative optical power, a first side surface of the first lens being convex, and a second side surface of the first lens being concave; a second lens, the second lens having optical power, a first side surface of the second lens being concave, and a second side surface of the second lens being convex; a third lens, the third lens having positive optical power, a first side surface of the third lens being concave, and a second side surface of the third lens being convex; a fourth lens, the fourth lens having optical power, and at least one of the first side surface and the second side surface of the fourth lens being convex; a fifth lens, the fifth lens having optical power; and a sixth lens, the sixth lens having optical power, and at least one of the first side surface and the second side surface of the sixth lens being convex.

[0008] Furthermore, the first side surface of the fourth lens is a convex surface, and the second side surface of the fourth lens is a convex surface.

[0009] Furthermore, the first side surface of the fourth lens is a convex surface, and the second side surface of the fourth lens is a concave surface.

[0010] Furthermore, the first side surface of the fifth lens is concave, and the second side surface of the fifth lens is concave.

[0011] Furthermore, the first side surface of the fifth lens is concave, and the second side surface of the fifth lens is convex.

[0012] Furthermore, the first side surface of the fifth lens is a convex surface, and the second side surface of the fifth lens is a convex surface.

[0013] Furthermore, the first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a convex surface.

[0014] Furthermore, the first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a concave surface.

[0015] Furthermore, the first side surface of the sixth lens is concave, and the second side surface of the sixth lens is convex.

[0016] Furthermore, the optical lens further includes a stop, which is arranged between the third lens and the fourth lens.

[0017] Furthermore, the first lens is an aspheric lens and / or the sixth lens is an aspheric lens.

[0018] Furthermore, the fourth lens and the fifth lens are cemented together to form a cemented lens.

[0019] Furthermore, the focal length f5 of the first side surface of the third lens, the focal length f6 of the second side surface of the third lens, and the focal length F3 of the third lens satisfy: -20≤(f5+f6) / F3≤-5.

[0020] Furthermore, the lens edge slope K(S5) at the maximum field angle of the first side surface of the third lens of the optical lens satisfies: -10≤arctan(1 / K(S5))≤-0.01.

[0021] Furthermore, a central curvature radius R5 of the first side surface of the third lens element of the optical lens and the entire focal length F of the optical lens group satisfy: -40≤R5 / F≤-10.

[0022] Furthermore, the lens edge slope K(S1) at the maximum field of view angle of the first side surface of the first lens of the optical lens satisfies: arctan(1 / K(S1))≥20; the lens edge slope K(S2) at the maximum field of view angle of the second side surface of the first lens of the optical lens satisfies: arctan(1 / K(S2))≥25.

[0023] Furthermore, a distance d23 on the optical axis from the center of the second side surface of the second lens to the center of the first side surface of the third lens and a distance TTL on the optical axis from the center of the first side surface of the first lens to the imaging plane of the optical lens satisfy the following relationship: 0.001≤d23 / TTL≤0.038.

[0024] Furthermore, a distance TTL from the center of the first side surface of the first lens to the imaging plane of the optical lens on the optical axis, a whole set focal length value F of the optical lens and a maximum field of view FOV of the optical lens satisfy: 0.01≤TTL / (F*FOV)≤0.1.

[0025] Furthermore, the distance TTL from the center of the first side surface of the first lens to the imaging plane of the optical lens on the optical axis, the entire focal length value F of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: 1.5≤TTL / (F*θ)≤3.

[0026] Furthermore, a distance TTL from the center of the first side surface of the first lens to the imaging plane of the optical lens on the optical axis and a whole-group focal length value F of the optical lens satisfy the following relationship: 2≤TTL / F≤8.

[0027] Furthermore, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: D / H / FOV≤0.02.

[0028] Furthermore, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy the following: D / H / θ≤1.2.

[0029] Furthermore, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2.

[0030] Furthermore, the combined focal length F45 of the fourth lens and the fifth lens of the optical lens and the focal length F of the entire optical lens group satisfy the following relationship: 1≤F45 / F≤25.

[0031] Furthermore, the focal length value F1 of the first lens of the optical lens and the focal length value F of the entire optical lens group satisfy: -5≤F1 / F≤-1.

[0032] Furthermore, the maximum field of view FOV of the optical lens, the entire focal length value F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: (FOV×F) / H≥60.

[0033] Furthermore, the arc value θ of the maximum field angle of the optical lens, the entire focal length value F of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: (θ×F) / H≥0.5.

[0034] Furthermore, a central curvature radius R5 of the first side surface of the third lens of the optical lens and a distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: R5 / TTL≤-0.05.

[0035] Furthermore, a central curvature radius R1 of the first side surface of the first lens of the optical lens and a central curvature radius R2 of the second side surface of the first lens of the optical lens satisfy: 1≤R1 / R2≤4.

[0036] Furthermore, the entire focal length value F of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy the following relationship: 0.2≤(H / 2) / (F*tan(θ / 2)≤1.

[0037] Furthermore, a central curvature radius R3 of the first side surface of the second lens of the optical lens and a central curvature radius R4 of the second side surface of the second lens of the optical lens satisfy: 0.3≤R3 / R4≤2.

[0038] Furthermore, a central curvature radius R5 of the first side surface of the third lens of the optical lens and a central curvature radius R6 of the second side surface of the third lens of the optical lens satisfy: 0.1≤(R5-R6) / (R5+R6)≤3.

[0039] According to another aspect of the present invention, an optical lens is provided, comprising, in order from the object side to the image side along the optical axis: a first lens, the first lens having negative optical power; a second lens, the second lens having optical power; a third lens, the third lens having positive optical power; a fourth lens, the fourth lens having optical power; a fifth lens, the fifth lens having optical power; and a sixth lens, the sixth lens having optical power; wherein a central curvature radius R5 of a first side surface of the third lens of the optical lens and a distance TTL on the optical axis from the center of the first side surface of the first lens to an imaging plane of the optical lens satisfy the following relationship: R5 / TTL≤-0.05.

[0040] Furthermore, the first side surface of the first lens is a convex surface, and the second side surface of the first lens is a concave surface.

[0041] Furthermore, the first side surface of the second lens is a concave surface, and the second side surface of the second lens is a convex surface.

[0042] Furthermore, the first side surface of the third lens is a concave surface, and the second side surface of the third lens is a convex surface.

[0043] Furthermore, the first side surface of the fourth lens is a convex surface, and the second side surface of the fourth lens is a convex surface.

[0044] Furthermore, the first side surface of the fourth lens is a convex surface, and the second side surface of the fourth lens is a concave surface.

[0045] Furthermore, the first side surface of the fifth lens is concave, and the second side surface of the fifth lens is concave.

[0046] Furthermore, the first side surface of the fifth lens is concave, and the second side surface of the fifth lens is convex.

[0047] Furthermore, the first side surface of the fifth lens is a convex surface, and the second side surface of the fifth lens is a convex surface.

[0048] Furthermore, the first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a convex surface.

[0049] Furthermore, the first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a concave surface.

[0050] Furthermore, the first side surface of the sixth lens is concave, and the second side surface of the sixth lens is convex.

[0051] Furthermore, the optical lens further includes a stop, which is arranged between the third lens and the fourth lens.

[0052] Furthermore, the first lens is an aspheric lens and / or the sixth lens is an aspheric lens.

[0053] Furthermore, the fourth lens and the fifth lens are cemented together to form a cemented lens.

[0054] Furthermore, the focal length f5 of the first side surface of the third lens, the focal length f6 of the second side surface of the third lens, and the focal length F3 of the third lens satisfy: -20≤(f5+f6) / F3≤-5.

[0055] Furthermore, the lens edge slope K(S5) at the maximum field angle of the first side surface of the third lens of the optical lens satisfies: -10≤arctan(1 / K(S5))≤-0.01.

[0056] Furthermore, a central curvature radius R5 of the first side surface of the third lens element of the optical lens and the entire focal length F of the optical lens group satisfy: -40≤R5 / F≤-10.

[0057] Furthermore, the lens edge slope K(S1) at the maximum field of view angle of the first side surface of the first lens of the optical lens satisfies: arctan(1 / K(S1))≥20; the lens edge slope K(S2) at the maximum field of view angle of the second side surface of the first lens of the optical lens satisfies: arctan(1 / K(S2))≥25.

[0058] Furthermore, a distance d23 on the optical axis from the center of the second side surface of the second lens to the center of the first side surface of the third lens and a distance TTL on the optical axis from the center of the first side surface of the first lens to the imaging plane of the optical lens satisfy the following relationship: 0.001≤d23 / TTL≤0.038.

[0059] Furthermore, a distance TTL from the center of the first side surface of the first lens to the imaging plane of the optical lens on the optical axis, a whole set focal length value F of the optical lens and a maximum field of view FOV of the optical lens satisfy: 0.01≤TTL / (F*FOV)≤0.1.

[0060] Furthermore, the distance TTL from the center of the first side surface of the first lens to the imaging plane of the optical lens on the optical axis, the entire focal length value F of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: 1.5≤TTL / (F*θ)≤3.

[0061] Furthermore, a distance TTL from the center of the first side surface of the first lens to the imaging plane of the optical lens on the optical axis and a whole-group focal length value F of the optical lens satisfy the following relationship: 2≤TTL / F≤8.

[0062] Furthermore, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: D / H / FOV≤0.02.

[0063] Furthermore, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy the following: D / H / θ≤1.2.

[0064] Furthermore, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2.

[0065] Furthermore, the combined focal length F45 of the fourth lens and the fifth lens of the optical lens and the focal length F of the entire optical lens group satisfy the following relationship: 1≤F45 / F≤25.

[0066] Furthermore, the focal length value F1 of the first lens of the optical lens and the focal length value F of the entire optical lens group satisfy: -5≤F1 / F≤-1.

[0067] Furthermore, the maximum field of view FOV of the optical lens, the entire focal length value F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: (FOV×F) / H≥60.

[0068] Furthermore, the arc value θ of the maximum field angle of the optical lens, the entire focal length value F of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: (θ×F) / H≥0.5.

[0069] Furthermore, a central curvature radius R1 of the first side surface of the first lens of the optical lens and a central curvature radius R2 of the second side surface of the first lens of the optical lens satisfy: 1≤R1 / R2≤4.

[0070] Furthermore, the entire focal length value F of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy the following relationship: 0.2≤(H / 2) / (F*tan(θ / 2)≤1.

[0071] Furthermore, a central curvature radius R3 of the first side surface of the second lens of the optical lens and a central curvature radius R4 of the second side surface of the second lens of the optical lens satisfy: 0.3≤R3 / R4≤2.

[0072] Furthermore, a central curvature radius R5 of the first side surface of the third lens of the optical lens and a central curvature radius R6 of the second side surface of the third lens of the optical lens satisfy: 0.1≤(R5-R6) / (R5+R6)≤3.

[0073] According to another aspect of the present invention, an electronic device is provided, comprising the above-mentioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0074] According to the technical solution of the present invention, the optical lens includes, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, wherein the first lens has negative optical power, a first side surface of the first lens is a convex surface, and a second side surface of the first lens is a concave surface; the second lens has optical power, a first side surface of the second lens is a concave surface, and a second side surface of the second lens is a convex surface; the third lens has positive optical power, a first side surface of the third lens is a concave surface, and a second side surface of the third lens is a convex surface; the fourth lens has optical power, and at least one of the first side surface and the second side surface of the fourth lens is a convex surface; the fifth lens has optical power; the sixth lens has optical power, and at least one of the first side surface and the second side surface of the sixth lens is a convex surface.

[0075] The first lens has a negative optical focal length, the first side of the first lens is a convex surface, and the second side of the first lens is a concave surface, so that the first lens can collect as much light of a large field of view as possible to enter the rear optical system, and fix the direction of the light of large angles at the edge. The first side of the first lens is a convex surface, which is conducive to the sliding of water droplets in practical applications and reduces the impact on imaging. The first lens is preferably made of a high refractive index material, which is conducive to reducing the diameter of the front port of the optical lens and improving the imaging quality. The second lens has an optical focal length, the first side of the second lens is a concave surface, and the second side of the second lens is a convex surface. The second lens is a meniscus shape that is concave on the object side, so that the light entering the second lens has a significant light turning, which changes the trend of the light of large angles and is conducive to achieving a large field of view. At the same time, the shape of the second lens is close to a concentric circle. Due to the special shape setting of the second lens, the light passing through the first lens can be smoothly transitioned to the rear optical system, and the diameter of the front port of the optical lens is reduced, reducing the volume, which is conducive to miniaturization and cost reduction.

[0076] The third lens has positive optical power, with its first side surface concave and its second side surface convex. The third lens has a meniscus shape with a concave object side, which facilitates collecting light rays exiting the second lens and effectively corrects astigmatism, improving image quality. The fourth lens has optical power, with at least one of its first and second side surfaces being convex. At least two lenses with positive optical power and one lens with negative optical power are positioned in front of the fourth lens. This changes the direction of light rays while also introducing certain aberrations. By controlling the optical power of the fourth lens, various aberrations introduced by the positive and negative lenses can be effectively corrected, improving image quality and optimizing optical properties such as distortion and CRA, ensuring image quality. The fifth lens has optical power. By properly configuring the optical power of the fifth lens, aberrations can be further reduced while ensuring a smooth transition of light rays to the imaging surface, reducing overall weight and cost. The sixth lens has optical power, with at least one of its first and second side surfaces being convex. This configuration results in a relatively flat shape for a smooth transition of light rays.

[0077] In addition, the optical lens of the present application also has the advantages of high resolution, miniaturization, small front-end diameter, large aperture, good temperature performance, large field of view, long focus, no ghost images and large central angle resolution. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0079] Figure 1 A schematic structural diagram of an optical lens according to Example 1 of the present invention is shown;

[0080] Figure 2 A schematic structural diagram of an optical lens according to Example 2 of the present invention is shown;

[0081] Figure 3 A schematic structural diagram of an optical lens according to Example 3 of the present invention is shown;

[0082] Figure 4 Schematic diagram of the structure of the optical lens of Example 4 of the present invention is shown;

[0083] Figure 5 1. A schematic structural diagram of an optical lens according to Example 5 of the present invention is shown;

[0084] Figure 6 1. A schematic structural diagram of an optical lens according to Example 6 of the present invention is shown;

[0085] Figure 7 1. A schematic structural diagram of an optical lens according to Example 7 of the present invention is shown;

[0086] Figure 8 1 is a schematic structural diagram of an optical lens according to Example 8 of the present invention.

[0087] The above drawings include the following reference numerals:

[0088] L1, first lens; S1, first side surface of the first lens; S2, second side surface of the first lens; L2, second lens; S3, first side surface of the second lens; S4, second side surface of the second lens; L3, third lens; S5, first side surface of the third lens; S6, second side surface of the third lens; STO, aperture; L4, fourth lens; S8, first side surface of the fourth lens; S9, second side surface of the fourth lens; L5, fifth lens; S9, first side surface of the fifth lens; S10, second side surface of the fifth lens; L6, sixth lens; S11, first side surface of the sixth lens; S12, second side surface of the sixth lens; L7, filter; S13, first side surface of the filter; S14, second side surface of the filter; S15, first side surface of the protective glass; S16, second side surface of the protective glass; IMA, imaging surface. DETAILED DESCRIPTION

[0089] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0090] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0091] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0092] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0093] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0094] In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial area; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial area. The surface of each lens close to the object side is called the first side surface of the lens, and the surface of each lens close to the image side is called the second side surface of the lens. The judgment of the surface shape in the paraxial area can be based on the judgment method of ordinary knowledge in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial area, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the convexity and concavity. For the first side, when the R value is positive, it is judged to be convex, and when the R value is negative, it is judged to be concave; for the second side, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0095] In exemplary embodiments, the optical lens provided herein can be used, for example, as an automotive lens. In this case, the first side of the optical lens can be the object side, and the second side can be the image side. Light from the object side can form an image on the image side. The second side of the optical lens is the imaging surface of the optical lens.

[0096] In exemplary embodiments, the optical lens provided herein can be used, for example, as a projection lens or a laser radar transmitter lens. In this case, the second side of the optical lens can be the image source side, and the first side can be the imaging side. Light from the image source side can be imaged on the imaging side. The second side of the optical lens serves as the image source side of the optical lens.

[0097] In order to solve the problem in the prior art that optical lenses are difficult to achieve simultaneously high resolution, miniaturization, large angular resolution and no ghosting, the present invention provides an optical lens and an electronic device.

[0098] Example 1

[0099] like Figures 1 to 8 As shown, the optical lens includes, from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, wherein the first lens has negative optical power, the first side surface of the first lens is convex, and the second side surface of the first lens is concave; the second lens has optical power, the first side surface of the second lens is concave, and the second side surface of the second lens is convex; the third lens has positive optical power, the first side surface of the third lens is concave, and the second side surface of the third lens is convex; the fourth lens has optical power, and at least one of the first side surface and the second side surface of the fourth lens is convex; the fifth lens has optical power; the sixth lens has optical power, and at least one of the first side surface and the second side surface of the sixth lens is convex.

[0100] The first lens has a negative optical focal length, the first side of the first lens is a convex surface, and the second side of the first lens is a concave surface, so that the first lens can collect as much light of a large field of view as possible to enter the rear optical system, and fix the direction of the light of large angles at the edge. The first side of the first lens is a convex surface, which is conducive to the sliding of water droplets in practical applications and reduces the impact on imaging. The first lens is preferably made of a high refractive index material, which is conducive to reducing the diameter of the front port of the optical lens and improving the imaging quality. The second lens has an optical focal length, the first side of the second lens is a concave surface, and the second side of the second lens is a convex surface. The second lens is a meniscus shape that is concave on the object side, so that the light entering the second lens has a significant light turning, which changes the trend of the light of large angles and is conducive to achieving a large field of view. At the same time, the shape of the second lens is close to a concentric circle. Due to the special shape setting of the second lens, the light passing through the first lens can be smoothly transitioned to the rear optical system, and the diameter of the front port of the optical lens is reduced, reducing the volume, which is conducive to miniaturization and cost reduction.

[0101] The third lens has positive optical power, with its first side surface concave and its second side surface convex. The third lens has a meniscus shape with a concave object side, which facilitates collecting light rays exiting the second lens and effectively corrects astigmatism, improving image quality. The fourth lens has optical power, with at least one of its first and second side surfaces being convex. At least two lenses with positive optical power and one lens with negative optical power are positioned in front of the fourth lens. This changes the direction of light rays while also introducing certain aberrations. By controlling the optical power of the fourth lens, various aberrations introduced by the positive and negative lenses can be effectively corrected, improving image quality and optimizing optical properties such as distortion and CRA, ensuring image quality. The fifth lens has optical power. By properly configuring the optical power of the fifth lens, aberrations can be further reduced while ensuring a smooth transition of light rays to the imaging surface, reducing overall weight and cost. The sixth lens has optical power, with at least one of its first and second side surfaces being convex. This configuration results in a relatively flat shape for a smooth transition of light rays.

[0102] In addition, the optical lens of the present application also has the advantages of high resolution, miniaturization, small front-end diameter, large aperture, good temperature performance, large field of view, long focus, no ghost images and large central angle resolution.

[0103] In this embodiment, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is also convex. In this case, the fourth lens has positive optical power. At least two lenses with positive optical power and one lens with negative optical power are positioned in front of the fourth lens. This changes the direction of light and also introduces certain aberrations. The fourth lens is a positive lens, which has a converging effect on light. By controlling the focal length of the fourth lens, various aberrations introduced by the positive and negative lenses in front can be effectively corrected, improving image quality and optimizing optical properties such as distortion and CRA.

[0104] In this embodiment, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is concave. In this case, the fourth lens has negative optical power. At least two lenses with positive optical power and one lens with negative optical power are positioned in front of the fourth lens. This changes the direction of light and also introduces certain aberrations. The fourth lens is a negative lens, which has a diverging effect on light. By controlling the focal length of the fourth lens, various aberrations introduced by the positive and negative lenses in front can be effectively corrected, improving image quality and optimizing optical properties such as distortion and CRA.

[0105] In this embodiment, the first side surface of the fifth lens is concave, and the second side surface of the fifth lens is also concave. In this case, the fifth lens has negative optical power. Negative optical power causes the fifth lens to diverge light. Properly setting the optical power of the fifth lens can further reduce aberrations while ensuring an effective and smooth transition of light at the end, allowing it to reach the imaging surface smoothly, reducing overall weight and cost.

[0106] In this embodiment, the first side surface of the fifth lens is concave, and the second side surface of the fifth lens is convex. In this case, the fifth lens has negative optical power. Negative optical power causes the fifth lens to diverge light. Properly setting the optical power of the fifth lens can further reduce aberrations while ensuring an effective and smooth transition of light at the end, allowing it to reach the imaging surface smoothly, reducing overall weight and cost.

[0107] In this embodiment, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is convex. In this case, the fifth lens has positive refractive power, which has a converging effect on light. Properly setting the refractive power of the fifth lens can further reduce aberrations while also ensuring effective and smooth convergence of light, ensuring that light reaches the imaging surface smoothly, reducing overall weight and cost.

[0108] In this embodiment, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is convex. In this case, the sixth lens has positive optical power, which is conducive to a smooth lens shape and further facilitates a smooth transition of light to the imaging surface.

[0109] In this embodiment, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. In this case, the optical power of the sixth lens can be positive or negative, and can be set according to actual conditions. This helps to smooth the lens shape and, in turn, facilitates a smooth transition of light to the imaging surface.

[0110] In this embodiment, the first side surface of the sixth lens is concave, and the second side surface of the sixth lens is convex. In this case, the sixth lens has negative optical power, which is conducive to a smooth lens shape and thus facilitates a smooth transition of light to the imaging surface.

[0111] In this embodiment, the optical lens further includes a stop, which is disposed between the third lens element and the fourth lens element. This arrangement is conducive to reducing the diameter of the rear port, reducing the introduction of peripheral aberration light to the rear, and thus improving the resolution.

[0112] In this embodiment, the first lens is an aspheric lens, which facilitates high angular resolution in the central region and improves the resolving power. The sixth lens is preferably an aspheric lens, which facilitates correction of astigmatism and field curvature, corrects system aberrations, and improves the resolving power of the optical system.

[0113] In this embodiment, the fourth lens and the fifth lens are glued together to form a cemented lens. When the fourth lens has positive optical power, the fifth lens has negative optical power; when the fourth lens has negative optical power, the fifth lens has positive optical power. By properly allocating the optical power of the fourth and fifth lenses, thermal compensation is achieved, resulting in good temperature performance. After the fourth and fifth lenses are glued together, the light rays on the first side of the fifth lens and the second side of the fourth lens follow almost the same path, without significant deflection. Therefore, the light rays emitted by the fourth lens can be well received by the fifth lens, reducing the loss of light rays in each field of view and improving the relative illumination of each field of view. At the same time, the provision of a cemented lens allows the light rays passing through the front lens to smoothly transition to the rear optical system, reducing the overall length of the system. This allows the various aberrations of the optical system to be fully corrected, improving resolution while maintaining a compact structure, and optimizing optical properties such as distortion and CRA.

[0114] In addition, the fourth lens and the fifth lens are cemented together to form a cemented lens, which can effectively reduce the air gap between the fourth lens and the fifth lens and reduce the total length of the system. The dispersion of the fourth lens and the fifth lens is complementary, which is beneficial to reducing chromatic aberration and improving imaging quality. It can also reduce the number of assembly components between the two lenses, reduce the number of processes, and reduce costs. Because the transition of light between the second side of the fourth lens and the first side of the fifth lens is smooth, when the two lenses are tilted or misaligned with each other during the assembly process, the light trend will not change significantly, reducing the sensitivity of the lens during assembly and reducing the sensitivity of the lens unit to tolerances such as tilt or eccentricity caused by the assembly process. At the same time, it can further reduce the field curvature and correct the off-axis point aberrations of the system.

[0115] In this embodiment, the focal length f5 of the first side surface of the third lens element, the focal length f6 of the second side surface of the third lens element, and the focal length F3 of the third lens element satisfy the following relationship: -20 ≤ (f5 + f6) / F3 ≤ -5. By properly allocating the focal lengths of the first and second side surfaces of the third lens element, incident light can be facilitated to enter the aperture and astigmatism can be effectively corrected, thereby improving image quality. Preferably, -18 ≤ (f5 + f6) / F3 ≤ -7.

[0116] In this embodiment, the lens edge slope K(S5) at the maximum field of view angle of the first side surface of the third lens element of the optical lens satisfies the following: -10 ≤ arctan(1 / K(S5)) ≤ -0.01. By properly controlling the angle of the first side surface of the third lens element, the angle of incidence of incident light on the first side surface of the third lens element is reduced, thereby improving image quality. Preferably, -5 ≤ arctan(1 / K(S5)) ≤ -0.07.

[0117] In this embodiment, the central radius of curvature R5 of the first side surface of the third lens element of the optical lens satisfies the following relationship with the overall focal length F of the optical lens: -40 ≤ R5 / F ≤ -10. Meeting this conditional relationship helps ensure a larger central radius of curvature of the first side surface of the third lens element, thereby reducing the angle of incidence of incident light on the first side surface of the third lens element and improving image quality. Preferably, -30 ≤ R5 / F ≤ -15.

[0118] In this embodiment, the lens edge slope K(S1) at the maximum field of view angle of the first side surface of the first lens of the optical lens satisfies the following conditions: arctan(1 / K(S1))≥20. The first side surface of the first lens is configured to have a convex center and flat edges, so that incident light is concentrated at the edges. Preferably, arctan(1 / K(S1))≥23.

[0119] In this embodiment, the lens edge slope K(S2) of the second side surface of the first lens element at the maximum field of view angle satisfies the following condition: arctan(1 / K(S2))≥25. This condition ensures a larger angle of the second side surface of the first lens element, facilitating rapid focusing of wide-angle peripheral light entering through the first lens element, thereby improving image quality. Preferably, arctan(1 / K(S2))≥35.

[0120] In this embodiment, the distance d23 between the center of the second side surface of the second lens and the center of the first side surface of the third lens on the optical axis and the distance TTL between the center of the first side surface of the first lens and the imaging plane of the optical lens on the optical axis satisfy the following equation: 0.001 ≤ d23 / TTL ≤ 0.038. This conditional equation reduces the distance between the second lens and the third lens, facilitating miniaturization. Preferably, 0.002 ≤ d23 / TTL ≤ 0.032.

[0121] In this embodiment, the distance TTL from the center of the first side surface of the first lens to the imaging plane of the optical lens on the optical axis, the focal length F of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following conditions: 0.01 ≤ TTL / (F*FOV) ≤ 0.1. This condition effectively limits the length of the optical lens for the same imaging plane and image height, facilitating miniaturization. Preferably, 0.03 ≤ TTL / (F*FOV) ≤ 0.075.

[0122] In this embodiment, the distance TTL from the center of the first side surface of the first lens to the imaging plane of the optical lens on the optical axis, the focal length F of the optical lens, and the arc value θ of the maximum field of view of the optical lens satisfy the following equation: 1.5 ≤ TTL / (F*θ) ≤ 3. This condition effectively limits the length of the optical lens for the same imaging plane and image height, facilitating miniaturization. Preferably, 2 ≤ TTL / (F*θ) ≤ 2.9.

[0123] In this embodiment, the distance TTL from the center of the first side surface of the first lens element to the imaging plane of the optical lens on the optical axis and the overall focal length F of the optical lens satisfy the following relationship: 2 ≤ TTL / F ≤ 8. A smaller TTL / F increases system sensitivity, while a larger TTL / F improves resolution and system sensitivity. Therefore, considering cost, miniaturization, system resolution, and sensitivity, the above range is maintained. Preferably, 3 ≤ TTL / F ≤ 5.

[0124] In this embodiment, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: D / H / FOV ≤ 0.02. Meeting this conditional equation helps ensure a small front port diameter of the optical lens, facilitating miniaturization. Preferably, D / H / FOV ≤ 0.018.

[0125] In this embodiment, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the arc value θ of the maximum field of view of the optical lens satisfy the following relationship: D / H / θ ≤ 1.2. Meeting this conditional equation helps ensure a small front port diameter of the optical lens, facilitating miniaturization. Preferably, D / H / θ ≤ 1.

[0126] In this embodiment, the optical lens's focal length F and its entrance pupil diameter ENPD satisfy the following relationship: F / ENPD ≤ 2. Meeting this conditional expression ensures a low FNO, which helps increase light throughput. Preferably, F / ENPD ≤ 1.7.

[0127] In this embodiment, the combined focal length F45 of the fourth and fifth lenses of the optical lens system satisfies the following relationship with the overall focal length F of the optical lens: 1 ≤ F45 / F ≤ 25. Proper distribution of F45 facilitates thermal compensation and achieves excellent temperature performance. Preferably, 1.8 ≤ F45 / F ≤ 22.

[0128] In this embodiment, the focal length F1 of the first lens element of the optical lens and the focal length F of the entire optical lens group satisfy the following relationship: -5 ≤ F1 / F ≤ -1. This conditional relationship ensures that the first lens element is a negative lens and, by properly distributing the focal length of the first lens element, facilitates the entry of light into the optical system at a wide field of view angle. Preferably, -3 ≤ F1 / F ≤ -1.5.

[0129] In this embodiment, the maximum field of view (FOV) of the optical lens, the focal length (F) of the entire optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following equation: (FOV × F) / H ≥ 60. Meeting this conditional equation simultaneously achieves both a long focal length and a wide field of view, helping the overall optical lens achieve both a wide field of view and high central angular resolution. Preferably, (FOV × F) / H ≥ 70.

[0130] In this embodiment, the arc value θ of the optical lens's maximum field of view, the focal length F of the optical lens, and the image height H corresponding to the optical lens's maximum field of view satisfy the following equation: (θ × F) / H ≥ 0.5. Meeting this conditional expression simultaneously achieves both a long focal length and a wide field of view, helping the overall optical lens achieve both a wide field of view and high central angular resolution. Preferably, (θ × F) / H ≥ 1.

[0131] In this embodiment, the central radius of curvature R5 of the first side surface of the third lens element of the optical lens and the distance TTL on the optical axis from the center of the first side surface of the first lens element to the imaging plane of the optical lens satisfy the following equation: R5 / TTL ≤ -0.05. By controlling this conditional expression within a reasonable range, the pupil image of ghost images can be moved away from the focal plane, effectively reducing the relative energy of ghost images and improving the quality of the image formed by the optical lens. Preferably, R5 / TTL ≤ -1.

[0132] In this embodiment, the central curvature radius R1 of the first side surface of the first lens of the optical lens and the central curvature radius R2 of the second side surface of the first lens of the optical lens satisfy the following relationship: 1 ≤ R1 / R2 ≤ 4. Meeting this conditional equation ensures a small central curvature radius of the first side surface of the first lens, which helps improve the central field of view angular resolution. Preferably, 1.5 ≤ R1 / R2 ≤ 2.5.

[0133] In this embodiment, the entire focal length value F of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy the following conditions: 0.2≤(H / 2) / (F*tan(θ / 2)≤1. This condition reflects the ratio of the actual image height to the ideal image height, achieving high angular resolution. Preferably, 0.3≤(H / 2) / (F*tan(θ / 2)≤0.8.

[0134] In this embodiment, the central curvature radius R3 of the first side surface of the second lens element of the optical lens and the central curvature radius R4 of the second side surface of the second lens element of the optical lens satisfy the following relationship: 0.3 ≤ R3 / R4 ≤ 2. Meeting this conditional equation makes the shape of the second lens nearly concentric, facilitating a smooth transition of light and reducing lens sensitivity. Preferably, 0.7 ≤ R3 / R4 ≤ 1.3.

[0135] In this embodiment, the central curvature radius R5 of the first side surface of the third lens element of the optical lens and the central curvature radius R6 of the second side surface of the third lens element of the optical lens satisfy the following relationship: 0.1 ≤ (R5 - R6) / (R5 + R6) ≤ 3. Meeting this conditional equation can correct aberrations of the optical system and ensure that when light emitted from the second lens element enters the first side surface of the third lens element, the incident light is relatively smooth, thereby reducing the tolerance sensitivity of the optical system. Preferably, 0.5 ≤ (R5 - R6) / (R5 + R6) ≤ 1.3.

[0136] Example 2

[0137] like Figures 1 to 8 As shown, the optical lens includes, from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has negative optical power; the second lens has optical power; the third lens has positive optical power; the fourth lens has optical power; the fifth lens has optical power; and the sixth lens has optical power. The central curvature radius R5 of the first side surface of the third lens of the optical lens and the distance TTL from the center of the first side surface of the first lens to the imaging plane of the optical lens on the optical axis satisfy the following relationship: R5 / TTL ≤ -0.05. Preferably, R5 / TTL ≤ -1.

[0138] The first lens has a negative optical power, which allows it to collect as much light as possible from a wide field of view into the rear optical system, fixing the direction of light at large angles at the edge. The second lens has an optical power, which allows light to have a significant deflection when entering the second lens, changing the trend of large-angle light and facilitating the realization of a wide field of view. At the same time, the light passing through the first lens can be smoothly transitioned to the rear optical system, and the front port diameter of the optical lens can be reduced, reducing the volume, which is conducive to miniaturization and cost reduction. The third lens has a positive optical power, which is conducive to collecting the outgoing light from the second lens and effectively correcting astigmatism to improve imaging quality.

[0139] At least two lenses with positive optical power and one lens with negative optical power are set in front of the fourth lens. While changing the direction of light, they also introduce certain aberrations. By controlling the optical power of the fourth lens, various aberrations introduced by the positive and negative lenses in front can be effectively corrected, improving image quality, optimizing optical properties such as distortion and CRA, and ensuring image quality. The fifth lens has optical power. By properly setting the optical power of the fifth lens, aberrations can be further reduced while also ensuring an effective and smooth transition of light at the end, allowing the light to smoothly reach the imaging surface, reducing overall weight and cost. The sixth lens has optical power. This configuration makes the shape of the sixth lens relatively flat, which is conducive to a smooth transition of light. By controlling the relationship between the central curvature radius R5 of the first side surface of the third lens of the optical lens and the distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis within a reasonable range, the pupil image of the ghost image can be moved away from the focal plane, effectively reducing the relative energy value of the ghost image and improving the quality of the image formed by the optical lens.

[0140] In addition, the optical lens of the present application also has the advantages of high resolution, miniaturization, small front-end diameter, large aperture, good temperature performance, large field of view, long focus, no ghost images and large central angle resolution.

[0141] In this embodiment, the first side surface of the first lens is convex, and the second side surface of the first lens is concave. This allows the first lens to collect as much light as possible from a wide field of view into the rear optical system, while also stabilizing the direction of light at large angles from the edge. The convex first side surface of the first lens facilitates the shedding of water droplets in practical applications, minimizing their impact on imaging. The first lens is preferably made of a high-refractive-index material, which facilitates reducing the front diameter of the optical lens and improving imaging quality.

[0142] In this embodiment, the first side surface of the second lens is concave, and the second side surface of the second lens is convex. The second lens has a meniscus shape with a concave object side, resulting in a distinct deflection of light entering the second lens. This changes the tendency of light at large angles and facilitates a wide field of view. Furthermore, the shape of the second lens is approximately concentric. Due to the unique shape of the second lens, light passing through the first lens is smoothly transitioned to the rear optical system, while also reducing the front diameter of the optical lens and its size, facilitating miniaturization and cost reduction.

[0143] In this embodiment, the first side surface of the third lens is concave, and the second side surface of the third lens is convex. The third lens has a meniscus shape with a concave object side, which is beneficial for collecting the outgoing light passing through the second lens and effectively correcting astigmatism to improve image quality.

[0144] In this embodiment, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is also convex. In this case, the fourth lens has positive optical power. At least two lenses with positive optical power and one lens with negative optical power are positioned in front of the fourth lens. This changes the direction of light and also introduces certain aberrations. The fourth lens is a positive lens, which has a converging effect on light. By controlling the focal length of the fourth lens, various aberrations introduced by the positive and negative lenses in front can be effectively corrected, improving image quality and optimizing optical properties such as distortion and CRA.

[0145] In this embodiment, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is concave. In this case, the fourth lens has negative optical power. At least two lenses with positive optical power and one lens with negative optical power are positioned in front of the fourth lens. This changes the direction of light and also introduces certain aberrations. The fourth lens is a negative lens, which has a diverging effect on light. By controlling the focal length of the fourth lens, various aberrations introduced by the positive and negative lenses in front can be effectively corrected, improving image quality and optimizing optical properties such as distortion and CRA.

[0146] In this embodiment, the first side surface of the fifth lens is concave, and the second side surface of the fifth lens is also concave. In this case, the fifth lens has negative optical power. Negative optical power causes the fifth lens to diverge light. Properly setting the optical power of the fifth lens can further reduce aberrations while ensuring an effective and smooth transition of light at the end, allowing it to reach the imaging surface smoothly, reducing overall weight and cost.

[0147] In this embodiment, the first side surface of the fifth lens is concave, and the second side surface of the fifth lens is convex. In this case, the fifth lens has negative optical power. Negative optical power causes the fifth lens to diverge light. Properly setting the optical power of the fifth lens can further reduce aberrations while ensuring an effective and smooth transition of light at the end, allowing it to reach the imaging surface smoothly, reducing overall weight and cost.

[0148] In this embodiment, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is convex. In this case, the fifth lens has positive refractive power, which has a converging effect on light. Properly setting the refractive power of the fifth lens can further reduce aberrations while also ensuring effective and smooth convergence of light, ensuring that light reaches the imaging surface smoothly, reducing overall weight and cost.

[0149] In this embodiment, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is convex. In this case, the sixth lens has positive optical power, which is conducive to a smooth lens shape and further facilitates a smooth transition of light to the imaging surface.

[0150] In this embodiment, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. In this case, the optical power of the sixth lens can be positive or negative, and can be set according to actual conditions. This helps to smooth the lens shape and, in turn, facilitates a smooth transition of light to the imaging surface.

[0151] In this embodiment, the first side surface of the sixth lens is concave, and the second side surface of the sixth lens is convex. In this case, the sixth lens has negative optical power, which is conducive to a smooth lens shape and thus facilitates a smooth transition of light to the imaging surface.

[0152] In this embodiment, the optical lens further includes a stop, which is disposed between the third lens element and the fourth lens element. This arrangement is conducive to reducing the diameter of the rear port, reducing the introduction of peripheral aberration light to the rear, and thus improving the resolution.

[0153] In this embodiment, the first lens is an aspheric lens, which facilitates high angular resolution in the central region and improves the resolving power. The sixth lens is preferably an aspheric lens, which facilitates correction of astigmatism and field curvature, corrects system aberrations, and improves the resolving power of the optical system.

[0154] In this embodiment, the fourth lens and the fifth lens are glued together to form a cemented lens. When the fourth lens has positive optical power, the fifth lens has negative optical power; when the fourth lens has negative optical power, the fifth lens has positive optical power. By properly allocating the optical power of the fourth and fifth lenses, thermal compensation is achieved, resulting in good temperature performance. After the fourth and fifth lenses are glued together, the light rays on the first side of the fifth lens and the second side of the fourth lens follow almost the same path, without significant deflection. Therefore, the light rays emitted by the fourth lens can be well received by the fifth lens, reducing the loss of light rays in each field of view and improving the relative illumination of each field of view. At the same time, the provision of a cemented lens allows the light rays passing through the front lens to smoothly transition to the rear optical system, reducing the overall length of the system. This allows the various aberrations of the optical system to be fully corrected, improving resolution while maintaining a compact structure, and optimizing optical properties such as distortion and CRA.

[0155] In addition, the fourth lens and the fifth lens are cemented together to form a cemented lens, which can effectively reduce the air gap between the fourth lens and the fifth lens and reduce the total length of the system. The dispersion of the fourth lens and the fifth lens is complementary, which is beneficial to reducing chromatic aberration and improving imaging quality. It can also reduce the number of assembly components between the two lenses, reduce the number of processes, and reduce costs. Because the transition of light between the second side of the fourth lens and the first side of the fifth lens is smooth, when the two lenses are tilted or misaligned with each other during the assembly process, the light trend will not change significantly, reducing the sensitivity of the lens during assembly and reducing the sensitivity of the lens unit to tolerances such as tilt or eccentricity caused by the assembly process. At the same time, it can further reduce the field curvature and correct the off-axis point aberrations of the system.

[0156] In this embodiment, the focal length f5 of the first side surface of the third lens element, the focal length f6 of the second side surface of the third lens element, and the focal length F3 of the third lens element satisfy the following relationship: -20 ≤ (f5 + f6) / F3 ≤ -5. By properly allocating the focal lengths of the first and second side surfaces of the third lens element, incident light can be facilitated to enter the aperture and astigmatism can be effectively corrected, thereby improving image quality. Preferably, -18 ≤ (f5 + f6) / F3 ≤ -7.

[0157] In this embodiment, the lens edge slope K(S5) at the maximum field of view angle of the first side surface of the third lens element of the optical lens satisfies the following: -10 ≤ arctan(1 / K(S5)) ≤ -0.01. By properly controlling the angle of the first side surface of the third lens element, the angle of incidence of incident light on the first side surface of the third lens element is reduced, thereby improving image quality. Preferably, -5 ≤ arctan(1 / K(S5)) ≤ -0.07.

[0158] In this embodiment, the central radius of curvature R5 of the first side surface of the third lens element of the optical lens satisfies the following relationship with the overall focal length F of the optical lens: -40 ≤ R5 / F ≤ -10. Meeting this conditional relationship helps ensure a larger central radius of curvature of the first side surface of the third lens element, thereby reducing the angle of incidence of incident light on the first side surface of the third lens element and improving image quality. Preferably, -30 ≤ R5 / F ≤ -15.

[0159] In this embodiment, the lens edge slope K(S1) at the maximum field of view angle of the first side surface of the first lens of the optical lens satisfies the following conditions: arctan(1 / K(S1))≥20. The first side surface of the first lens is configured to have a convex center and flat edges, so that incident light is concentrated at the edges. Preferably, arctan(1 / K(S1))≥23.

[0160] In this embodiment, the lens edge slope K(S2) of the second side surface of the first lens element at the maximum field of view angle satisfies the following condition: arctan(1 / K(S2))≥25. This condition ensures a larger angle of the second side surface of the first lens element, facilitating rapid focusing of wide-angle peripheral light entering through the first lens element, thereby improving image quality. Preferably, arctan(1 / K(S2))≥35.

[0161] In this embodiment, the distance d23 between the center of the second side surface of the second lens and the center of the first side surface of the third lens on the optical axis and the distance TTL between the center of the first side surface of the first lens and the imaging plane of the optical lens on the optical axis satisfy the following equation: 0.001 ≤ d23 / TTL ≤ 0.038. This conditional equation reduces the distance between the second lens and the third lens, facilitating miniaturization. Preferably, 0.002 ≤ d23 / TTL ≤ 0.032.

[0162] In this embodiment, the distance TTL from the center of the first side surface of the first lens to the imaging plane of the optical lens on the optical axis, the focal length F of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following conditions: 0.01 ≤ TTL / (F*FOV) ≤ 0.1. This condition effectively limits the length of the optical lens for the same imaging plane and image height, facilitating miniaturization. Preferably, 0.03 ≤ TTL / (F*FOV) ≤ 0.075.

[0163] In this embodiment, the distance TTL from the center of the first side surface of the first lens to the imaging plane of the optical lens on the optical axis, the focal length F of the optical lens, and the arc value θ of the maximum field of view of the optical lens satisfy the following equation: 1.5 ≤ TTL / (F*θ) ≤ 3. This condition effectively limits the length of the optical lens for the same imaging plane and image height, facilitating miniaturization. Preferably, 2 ≤ TTL / (F*θ) ≤ 2.9.

[0164] In this embodiment, the distance TTL from the center of the first side surface of the first lens element to the imaging plane of the optical lens on the optical axis and the overall focal length F of the optical lens satisfy the following relationship: 2 ≤ TTL / F ≤ 8. A smaller TTL / F increases system sensitivity, while a larger TTL / F improves resolution and system sensitivity. Therefore, considering cost, miniaturization, system resolution, and sensitivity, the above range is maintained. Preferably, 3 ≤ TTL / F ≤ 5.

[0165] In this embodiment, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: D / H / FOV ≤ 0.02. Meeting this conditional equation helps ensure a small front port diameter of the optical lens, facilitating miniaturization. Preferably, D / H / FOV ≤ 0.018.

[0166] In this embodiment, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the arc value θ of the maximum field of view of the optical lens satisfy the following relationship: D / H / θ ≤ 1.2. Meeting this conditional equation helps ensure a small front port diameter of the optical lens, facilitating miniaturization. Preferably, D / H / θ ≤ 1.

[0167] In this embodiment, the optical lens's focal length F and its entrance pupil diameter ENPD satisfy the following relationship: F / ENPD ≤ 2. Meeting this conditional expression ensures a low FNO, which helps increase light throughput. Preferably, F / ENPD ≤ 1.7.

[0168] In this embodiment, the combined focal length F45 of the fourth and fifth lenses of the optical lens system satisfies the following relationship with the overall focal length F of the optical lens: 1 ≤ F45 / F ≤ 25. Proper distribution of F45 facilitates thermal compensation and achieves excellent temperature performance. Preferably, 1.8 ≤ F45 / F ≤ 22.

[0169] In this embodiment, the focal length F1 of the first lens element of the optical lens and the focal length F of the entire optical lens group satisfy the following relationship: -5 ≤ F1 / F ≤ -1. This conditional relationship ensures that the first lens element is a negative lens and, by properly distributing the focal length of the first lens element, facilitates the entry of light into the optical system at a wide field of view angle. Preferably, -3 ≤ F1 / F ≤ -1.5.

[0170] In this embodiment, the maximum field of view (FOV) of the optical lens, the focal length (F) of the entire optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following equation: (FOV × F) / H ≥ 60. Meeting this conditional equation simultaneously achieves both a long focal length and a wide field of view, helping the overall optical lens achieve both a wide field of view and high central angular resolution. Preferably, (FOV × F) / H ≥ 70.

[0171] In this embodiment, the arc value θ of the optical lens's maximum field of view, the focal length F of the optical lens, and the image height H corresponding to the optical lens's maximum field of view satisfy the following equation: (θ × F) / H ≥ 0.5. Meeting this conditional expression simultaneously achieves both a long focal length and a wide field of view, helping the overall optical lens achieve both a wide field of view and high central angular resolution. Preferably, (θ × F) / H ≥ 1.

[0172] In this embodiment, the central curvature radius R1 of the first side surface of the first lens of the optical lens and the central curvature radius R2 of the second side surface of the first lens of the optical lens satisfy the following relationship: 1 ≤ R1 / R2 ≤ 4. Meeting this conditional equation ensures a small central curvature radius of the first side surface of the first lens, which helps improve the central field of view angular resolution. Preferably, 1.5 ≤ R1 / R2 ≤ 2.5.

[0173] In this embodiment, the entire focal length value F of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy the following conditions: 0.2≤(H / 2) / (F*tan(θ / 2)≤1. This condition reflects the ratio of the actual image height to the ideal image height, achieving high angular resolution. Preferably, 0.3≤(H / 2) / (F*tan(θ / 2)≤0.8.

[0174] In this embodiment, the central curvature radius R3 of the first side surface of the second lens element of the optical lens and the central curvature radius R4 of the second side surface of the second lens element of the optical lens satisfy the following relationship: 0.3 ≤ R3 / R4 ≤ 2. Meeting this conditional equation makes the shape of the second lens nearly concentric, facilitating a smooth transition of light and reducing lens sensitivity. Preferably, 0.7 ≤ R3 / R4 ≤ 1.3.

[0175] In this embodiment, the central curvature radius R5 of the first side surface of the third lens element of the optical lens and the central curvature radius R6 of the second side surface of the third lens element of the optical lens satisfy the following relationship: 0.1 ≤ (R5 - R6) / (R5 + R6) ≤ 3. Meeting this conditional equation can correct aberrations of the optical system and ensure that when light emitted from the second lens element enters the first side surface of the third lens element, the incident light is relatively smooth, thereby reducing the tolerance sensitivity of the optical system. Preferably, 0.5 ≤ (R5 - R6) / (R5 + R6) ≤ 1.3.

[0176] Optionally, the optical lens may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0177] The optical lens in the present application may utilize multiple lenses, such as the six lenses described above. In the present application, at least one of the lens surfaces is an aspherical surface. An aspherical lens is characterized by a continuously varying curvature from the center of the lens to the periphery. Unlike a spherical lens, which has a constant curvature from the center to the periphery, an aspherical lens has a better curvature radius characteristic, with the advantages of improving distortion aberration and astigmatism. By using an aspherical lens, aberrations that occur during imaging can be eliminated as much as possible, thereby improving image quality.

[0178] In an exemplary embodiment, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens may all be glass lenses. An optical lens made of glass can suppress the deviation of the back focus of the optical lens with temperature changes, thereby improving the stability of the system. At the same time, the use of glass material can avoid lens imaging blur caused by high and low temperature changes in the use environment, which affects the normal use of the lens. For example, an optical lens with an all-glass design has a wide temperature range and can maintain stable optical performance in the range of -40°C to 105°C. Specifically, when the focus is on resolution quality and reliability, the first lens to the sixth lens may all be glass aspherical lenses. Of course, in applications where temperature stability requirements are lower, the first lens to the sixth lens in the optical lens may also be made of plastic. Using plastic to make optical lenses can effectively reduce production costs. Of course, the first lens to the sixth lens in the optical lens may also be made of a combination of plastic and glass.

[0179] The present application also provides an electronic device comprising the above-described optical lens and an imaging element that converts an optical image formed by the optical lens into an electrical signal. The imaging element may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The electronic device may be an independent imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The electronic device is equipped with the above-described optical lens.

[0180] However, those skilled in the art will appreciate that the number of lenses comprising the optical lens can be varied to achieve the various results and advantages described herein without departing from the claimed technical solutions. For example, while six lenses are described in the embodiments, the optical lens is not limited to six lenses. If desired, the optical lens may include other numbers of lenses.

[0181] The following further describes examples of specific surface shapes and parameters of the optical lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0182] It should be noted that any one of the following examples 1 to 8 is applicable to all embodiments of the present application.

[0183] Example 1

[0184] like Figure 1 The figure shows a schematic diagram of the optical lens structure of Example 1.

[0185] like Figure 1As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0186] The first lens L1 has negative power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has positive power, with its first side surface S3 being concave and its second side surface S4 being convex. The third lens L3 has positive power, with its first side surface S5 being concave and its second side surface S6 being convex. The fourth lens L4 has positive power, with its first side surface S8 being convex and its second side surface S9 being convex. The fifth lens L5 has negative power, with its first side surface S9 being concave and its second side surface S10 being concave. The sixth lens L6 has positive power, with its first side surface S11 being convex and its second side surface S12 being convex. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA. The first lens L1, the second lens L2, and the sixth lens L6 are all aspherical lenses. The sixth lens L6 is a retrocurved lens.

[0187] In this example, the total effective focal length F of the optical lens is 5.986 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 26.152 mm.

[0188] Table 1 shows the basic structural parameters of the optical lens of Example 1, wherein the units of the curvature radius and thickness / distance are both millimeters (mm).

[0189] Surf Radius Thickness Nd Vd 1 4.370 2.266 1.81 40.92 2 2.258 3.493 3 -10.042 3.015 1.81 40.92 4 -10.910 0.104 5 -100.000 3.592 1.90 37.05 6 -10.200 -0.104 7 Infinity 0.270 8 9.050 3.578 1.50 81.59 9 -8.800 1.218 1.92 20.88 10 260.000 0.104 11 8.250 2.932 1.50 81.59 12 -17.100 1.558 13 Infinity 0.550 1.52 64.21 14 Infinity 1.262 15 Infinity 0.400 1.52 64.21 16 Infinity 1.914 IMA infinity

[0190] Table 1

[0191] In Example 1, the surface shape of each aspheric lens can be defined using, but not limited to, the following aspheric formula:

[0192]

[0193] Where x is the distance from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric 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; conic; A, B, C, D, and E are all higher-order coefficients. Table 2 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, and E that can be used for the aspheric lens surfaces S1, S2, S3, S4, S11, and S12 in Example 1.

[0194] Higher order terms / 4 6 8 10 12 Surf K A B C D E 1 -0.9759 -5.1625E-04 -1.4073E-04 1.1194E-06 1.6978E-07 -3.6360E-09 2 -0.8849 -7.7624E-04 -1.1715E-03 1.3958E-04 -9.8937E-06 3.9548E-07 3 0.9406 -1.2353E-03 -6.9333E-05 -1.0790E-06 9.1206E-07 -4.3336E-08 4 2.4169 -3.9117E-04 -2.8326E-05 5.2317E-06 -3.6920E-07 9.7377E-09 11 -4.0631 7.9902E-04 5.6374E-05 -2.8453E-06 2.3582E-07 -4.5562E-09 12 -51.2900 -7.0078E-04 1.5394E-04 -5.1404E-06 2.3240E-07 3.6551E-09

[0195] Table 2

[0196] Example 2

[0197] like Figure 2 , which is a schematic diagram of the optical lens structure of Example 2. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted.

[0198] like Figure 2 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0199] The first lens L1 has negative power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has positive power, with its first side surface S3 being concave and its second side surface S4 being convex. The third lens L3 has positive power, with its first side surface S5 being concave and its second side surface S6 being convex. The fourth lens L4 has positive power, with its first side surface S8 being convex and its second side surface S9 being convex. The fifth lens L5 has negative power, with its first side surface S9 being concave and its second side surface S10 being concave. The sixth lens L6 has positive power, with its first side surface S11 being convex and its second side surface S12 being convex. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA. The first lens L1, the second lens L2, and the sixth lens L6 are all aspherical lenses. The sixth lens L6 is a retrocurved lens.

[0200] In this example, the total effective focal length F of the optical lens is 5.993 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 26.006 mm.

[0201] Table 3 shows the basic structural parameters of the optical lens of Example 2, wherein the units of the curvature radius and thickness / distance are both millimeters (mm).

[0202] Surf Radius Thickness Nd Vd 1 4.330 2.266 1.81 40.92 2 2.258 3.493 3 -10.042 3.015 1.81 40.92 4 -10.910 0.104 5 -100.000 3.592 1.90 37.05 6 -10.172 -0.104 7 Infinity 0.270 8 9.011 3.578 1.50 81.59 9 -8.794 1.218 1.92 20.88 10 267.079 0.104 11 8.180 2.932 1.50 81.59 12 -17.100 1.558 13 Infinity 0.550 1.52 64.21 14 Infinity 1.262 15 Infinity 0.400 1.52 64.21 16 Infinity 1.767 IMA infinity

[0203] Table 3

[0204] Table 4 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, and E that can be used for the aspheric lens surfaces S1, S2, S3, S4, S11, and S12 in Example 2.

[0205] Higher order terms / 4 6 8 10 12 Surf K A B C D E 1 -0.9759 -5.2147E-04 -1.4073E-04 1.1194E-06 1.6978E-07 -3.6360E-09 2 -0.8849 -7.7624E-04 -1.1715E-03 1.3958E-04 -9.8937E-06 3.9548E-07 3 0.9406 -1.2542E-03 -7.0389E-05 -1.0790E-06 9.1206E-07 -4.3336E-08 4 2.4169 -4.2892E-04 -2.8326E-05 5.2317E-06 -3.6920E-07 9.7377E-09 11 -4.0731 7.8710E-04 5.6943E-05 -2.7884E-06 2.3111E-07 -4.5562E-09 12 -51.3000 -7.0433E-04 1.6036E-04 -5.1934E-06 2.2776E-07 3.5820E-09

[0206] Table 4

[0207] Example 3

[0208] like Figure 3 The figure shows a schematic diagram of the optical lens structure of Example 3.

[0209] like Figure 3 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0210] The first lens L1 has negative power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative power, with its first side surface S3 being concave and its second side surface S4 being convex. The third lens L3 has positive power, with its first side surface S5 being concave and its second side surface S6 being convex. The fourth lens L4 has positive power, with its first side surface S8 being convex and its second side surface S9 being convex. The fifth lens L5 has negative power, with its first side surface S9 being concave and its second side surface S10 being convex. The sixth lens L6 has positive power, with its first side surface S11 being convex and its second side surface S12 being concave. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA. The first lens L1, the second lens L2, and the sixth lens L6 are all aspherical lenses. The sixth lens L6 is a retrocurved lens.

[0211] In this example, the total effective focal length F of the optical lens is 5.607 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 27.550 mm.

[0212] Table 5 shows the basic structural parameters of the optical lens of Example 3, wherein the units of the curvature radius Radius and thickness / distance are both millimeters (mm).

[0213] Surf Radius Thickness Nd Vd 1 4.300 2.266 1.81 40.92 2 2.250 4.149 3 -13.930 3.015 1.81 40.92 4 -16.015 0.099 5 -100.000 3.592 1.90 37.05 6 -10.500 -0.104 7 Infinity 1.708 8 8.549 3.578 1.50 81.59 9 -6.107 1.218 1.92 20.88 10 -15.691 0.540 11 7.874 2.932 1.50 81.59 12 100.000 0.738 13 Infinity 0.550 1.52 64.21 14 Infinity 1.010 15 Infinity 0.400 1.52 64.21 16 Infinity 1.858 IMA infinity

[0214] Table 5

[0215] Table 6 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspheric lens surfaces S1, S2, S3, S4, S11, and S12 in Example 3.

[0216]

[0217]

[0218] Table 6

[0219] Example 4

[0220] like Figure 4 The figure shows a schematic diagram of the optical lens structure of Example 4.

[0221] like Figure 4 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0222] The first lens L1 has negative power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative power, with its first side surface S3 being concave and its second side surface S4 being convex. The third lens L3 has positive power, with its first side surface S5 being concave and its second side surface S6 being convex. The fourth lens L4 has positive power, with its first side surface S8 being convex and its second side surface S9 being convex. The fifth lens L5 has negative power, with its first side surface S9 being concave and its second side surface S10 being convex. The sixth lens L6 has positive power, with its first side surface S11 being convex and its second side surface S12 being concave. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA. The first lens L1, the second lens L2, and the sixth lens L6 are all aspherical lenses. The sixth lens L6 is a retrocurved lens.

[0223] In this example, the total effective focal length F of the optical lens is 5.686 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 27.461 mm.

[0224] Table 7 shows the basic structural parameters of the optical lens of Example 4, where the units of the curvature radius Radius and thickness / distance are both millimeters (mm).

[0225]

[0226]

[0227] Table 7

[0228] Table 8 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspheric lens surfaces S1, S2, S3, S4, S11, and S12 in Example 4.

[0229] Higher order terms / 4 6 8 Surf K A B C 1 -0.9759 -5.7060E-04 -1.5869E-04 1.0789E-06 2 -0.8849 -1.5654E-03 -1.2275E-03 1.3776E-04 3 0.9406 -7.2157E-04 -7.7376E-05 -4.0675E-06 4 2.4169 -3.0152E-04 -5.4430E-05 5.4326E-06 11 -4.0731 1.1257E-03 6.0874E-05 -3.1247E-06 12 -51.3000 -1.5066E-04 1.3755E-04 -1.9331E-06 Higher order terms 10 12 14 16 Surf D E F G 1 1.7842E-07 -3.4252E-09 -2.6873E-13 -1.7181E-13 2 -9.7264E-06 4.0388E-07 -1.6378E-09 -3.3926E-10 3 7.4606E-07 -4.7698E-08 1.4170E-10 6.1585E-11 4 -3.3953E-07 6.2265E-09 -3.1688E-10 6.5640E-11 11 2.1097E-07 -3.3744E-09 1.4590E-10 -1.2301E-13 12 2.5766E-07 -1.1510E-08 -5.8425E-10 1.6759E-10

[0230] Table 8

[0231] Example 5

[0232] like Figure 5 The figure shows a schematic diagram of the optical lens structure of Example 5.

[0233] like Figure 5 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0234] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 being concave and its second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S5 being concave and its second side surface S6 being convex. The fourth lens L4 has negative optical power, with its first side surface S8 being convex and its second side surface S9 being concave. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being convex. The sixth lens L6 has negative optical power, with its first side surface S11 being convex and its second side surface S12 being concave. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA. Both the first lens L1 and the second lens L2 are aspherical lenses.

[0235] In this example, the total effective focal length F of the optical lens is 6.123 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 25.393 mm.

[0236] Table 9 shows the basic structural parameters of the optical lens of Example 5, where the units of curvature radius Radius and thickness / distance are both millimeters (mm).

[0237] Surf Radius Thickness Nd Vd 1 4.300 2.780 1.59 61.10 2 2.217 3.540 3 -8.585 3.971 1.59 61.10 4 -7.205 0.745 5 -176.768 2.400 1.83 42.73 6 -9.200 0.358 7 Infinity 0.711 8 14.078 0.600 1.92 18.90 9 6.496 3.192 1.50 81.59 10 -7.651 0.301 11 12.924 2.000 1.80 46.57 12 9.498 1.000 13 Infinity 0.550 1.52 64.21 14 Infinity 1.098 15 Infinity 0.500 1.52 64.21 16 Infinity 1.648 IMA infinity

[0238] Table 9

[0239] Table 10 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, and E that can be used for the aspheric lens surfaces S1, S2, S3, S4, S11, and S12 in Example 5.

[0240] Higher order terms / 4 6 8 10 12 Surf K A B C D E 1 -0.5579 -6.7445E-04 -7.3478E-05 -1.3394E-06 1.1370E-07 -1.7171E-09 2 -0.9097 9.8559E-04 -8.6842E-04 8.7108E-05 -6.6020E-06 2.5950E-07 3 -0.1517 -2.1539E-03 2.7722E-05 -2.0317E-05 2.9788E-06 -1.2216E-07 4 2.5427 1.4460E-03 1.9201E-05 9.7838E-06 -6.9497E-07 4.3254E-08

[0241] Table 10

[0242] Example 6

[0243] like Figure 6 The figure shows a schematic diagram of the optical lens structure of Example 6.

[0244] like Figure 6 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0245] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 being concave and its second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S5 being concave and its second side surface S6 being convex. The fourth lens L4 has negative optical power, with its first side surface S8 being convex and its second side surface S9 being concave. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being convex. The sixth lens L6 has negative optical power, with its first side surface S11 being convex and its second side surface S12 being concave. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA. Both the first lens L1 and the second lens L2 are aspherical lenses.

[0246] In this example, the total effective focal length F of the optical lens is 6.082 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 25.284 mm.

[0247] Table 11 shows the basic structural parameters of the optical lens of Example 6, where the units of curvature radius Radius and thickness / distance are all millimeters (mm).

[0248] Surf Radius Thickness Nd Vd 1 4.284 2.780 1.59 61.10 2 2.217 3.540 3 -8.585 3.971 1.59 61.10 4 -7.205 0.745 5 -176.768 2.400 1.83 42.73 6 -9.107 0.358 7 Infinity 0.711 8 14.078 0.600 1.92 18.90 9 6.496 3.192 1.50 81.59 10 -7.700 0.300 11 12.940 2.000 1.80 46.57 12 9.650 1.000 13 Infinity 0.550 1.52 64.21 14 Infinity 1.098 15 Infinity 0.500 1.52 64.21 16 Infinity 1.538 IMA infinity

[0249] Table 11

[0250] Table 12 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, and E that can be used for the aspherical lens surfaces S1, S2, S3, S4, S11, and S12 in Example 6.

[0251] Higher order terms / 4 6 8 10 12 Surf K A B C D E 1 -0.5579 -6.7445E-04 -7.3478E-05 -1.3394E-06 1.1370E-07 -1.7171E-09 2 -0.9097 9.8559E-04 -8.6842E-04 8.7108E-05 -6.4699E-06 2.5431E-07 3 -0.1517 -2.1539E-03 2.7722E-05 -2.0317E-05 2.9788E-06 -1.2216E-07 4 2.5427 1.4316E-03 1.8817E-05 9.5881E-06 -6.6745E-07 4.0710E-08

[0252] Table 12

[0253] Example 7

[0254] like Figure 7 The figure shows a schematic diagram of the optical lens structure of Example 7.

[0255] like Figure 7 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0256] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 being concave and its second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S5 being concave and its second side surface S6 being convex. The fourth lens L4 has negative optical power, with its first side surface S8 being convex and its second side surface S9 being concave. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being convex. The sixth lens L6 has positive optical power, with its first side surface S11 being concave and its second side surface S12 being convex. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA. Both the first lens L1 and the second lens L2 are aspherical lenses.

[0257] In this example, the total effective focal length F of the optical lens is 5.862 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 26.238 mm.

[0258] Table 13 shows the basic structural parameters of the optical lens of Example 7, where the units of curvature radius Radius and thickness / distance are both millimeters (mm).

[0259] Surf Radius Thickness Nd Vd 1 4.504 3.079 1.59 61.10 2 2.170 3.566 3 -6.719 3.947 1.59 61.10 4 -7.040 0.610 5 -165.695 2.508 1.83 42.73 6 -9.250 0.208 7 Infinity 1.215 8 13.789 0.600 1.92 18.90 9 6.663 2.161 1.50 81.59 10 -7.118 0.616 11 -29.682 2.000 1.80 46.57 12 -30.245 1.273 13 Infinity 0.550 1.52 64.21 14 Infinity 1.371 15 Infinity 0.500 1.52 64.21 16 Infinity 2.034 IMA infinity

[0260] Table 13

[0261] Table 14 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspheric lens surfaces S1, S2, S3, S4, S11, and S12 in Example 7.

[0262] Higher order terms / 4 6 8 Surf K A B C 1 -0.5558 -7.7738E-04 -6.2426E-05 -1.2234E-06 2 -0.9348 3.9578E-05 -7.7343E-04 7.8671E-05 3 -0.1704 -2.0717E-03 3.0924E-05 -1.5440E-05 4 2.2173 1.6305E-03 3.0838E-05 1.0222E-05 Higher order terms 10 12 14 16 Surf D E F G 1 1.1128E-07 -1.8162E-09 -1.92406E-13 9.59783E-14 2 -6.4991E-06 3.2576E-07 -2.83244E-10 -2.53762E-10 3 3.0979E-06 -1.5176E-07 -2.55836E-09 2.38849E-10 4 -7.6875E-07 4.3447E-08 -2.48353E-10 -4.56657E-12

[0263] Table 14

[0264] Example 8

[0265] like Figure 8 The figure shows a schematic diagram of the optical lens structure of Example 8.

[0266] like Figure 8 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0267] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 being concave and its second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S5 being concave and its second side surface S6 being convex. The fourth lens L4 has negative optical power, with its first side surface S8 being convex and its second side surface S9 being concave. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being convex. The sixth lens L6 has positive optical power, with its first side surface S11 being concave and its second side surface S12 being convex. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA. Both the first lens L1 and the second lens L2 are aspherical lenses.

[0268] In this example, the total effective focal length F of the optical lens is 5.886 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 26.332 mm.

[0269] Table 15 shows the basic structural parameters of the optical lens of Example 8, where the units of curvature radius Radius and thickness / distance are both millimeters (mm).

[0270]

[0271]

[0272] Table 15

[0273] Table 16 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, and E that can be used for the aspherical lens surfaces S1, S2, S3, S4, S11, and S12 in Example 8.

[0274] Higher order terms / 4 6 8 Surf K A B C 1 -0.5586 -7.6864E-04 -6.2531E-05 -1.2262E-06 2 -0.9374 3.5819E-05 -7.8521E-04 7.9888E-05 3 -0.1704 -2.0699E-03 2.8496E-05 -1.5440E-05 4 2.2832 1.6302E-03 3.0372E-05 1.0018E-05 Higher order terms 10 12 14 16 Surf D E F G 1 1.1116E-07 -1.8059E-09 -1.9249E-13 9.5978E-14 2 -6.5502E-06 3.2576E-07 -2.8262E-10 -2.5370E-10 3 3.0922E-06 -1.5176E-07 -2.5072E-09 2.3407E-10 4 -7.5337E-07 4.6537E-08 -2.4338E-10 -4.4758E-12

[0275] Table 16

[0276] In summary, Examples 1 to 8 respectively satisfy the relationships shown in Table 17.

[0277]

[0278]

[0279] Table 17

[0280] Table 18 gives the effective focal length F of the optical lenses of Examples 1 to 8, the effective focal length F1 to F6 of each lens, etc. (unit: mm).

[0281]

[0282]

[0283] Table 18

[0284] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0285] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0286] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0287] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An optical lens, characterized in that: The optical lens has six lenses with optical power, which include the following lenses in order from the object side to the image side along the optical axis: a first lens having negative optical power, a first side surface of the first lens being convex, and a second side surface of the first lens being concave; a second lens having optical power, a first side surface of the second lens being concave, and a second side surface of the second lens being convex; a third lens having positive optical power, a first side surface of the third lens being concave, and a second side surface of the third lens being convex; a fourth lens having optical power, wherein a first side surface of the fourth lens is a convex surface; a fifth lens having optical power; a sixth lens having optical power, wherein at least one of the first side surface and the second side surface of the sixth lens is a convex surface; The second lens has positive focal power, the fourth lens has positive focal power, the fifth lens has negative focal power, and the sixth lens has positive focal power; or the second lens has negative focal power, the fourth lens has positive focal power, the fifth lens has negative focal power, and the sixth lens has positive focal power; or the second lens has positive focal power, the fourth lens has negative focal power, the fifth lens has positive focal power, and the sixth lens has negative focal power; or the second lens has positive focal power, the fourth lens has negative focal power, the fifth lens has positive focal power, and the sixth lens has positive focal power; The focal length f5 of the first side surface of the third lens, the focal length f6 of the second side surface of the third lens, and the focal length F3 of the third lens satisfy the following relationship: -20≤(f5+f6) / F3≤-5; A central curvature radius R1 of a first side surface of the first lens of the optical lens and a central curvature radius R2 of a second side surface of the first lens of the optical lens satisfy the following relationship: 1≤R1 / R2≤2.5; A central curvature radius R3 of the first side surface of the second lens of the optical lens and a central curvature radius R4 of the second side surface of the second lens of the optical lens satisfy the following relationship: 0.3≤R3 / R4≤2; A distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis and an entire focal length value F of the optical lens satisfy the following relationship: 3≤TTL / F≤8.

2. The optical lens according to claim 1, wherein: The second side surface of the fourth lens is a convex surface.

3. The optical lens according to claim 1, wherein: The second side surface of the fourth lens is concave.

4. The optical lens according to claim 1, wherein: The first side surface of the fifth lens is concave, and the second side surface of the fifth lens is concave.

5. The optical lens according to claim 1, wherein: The first side surface of the fifth lens is concave, and the second side surface of the fifth lens is convex.

6. The optical lens according to claim 1, wherein: The first side surface of the fifth lens is a convex surface, and the second side surface of the fifth lens is a convex surface.

7. The optical lens according to claim 1, wherein: The first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a convex surface.

8. The optical lens according to claim 1, wherein: The first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a concave surface.

9. The optical lens according to claim 1, wherein: The first side surface of the sixth lens is concave, and the second side surface of the sixth lens is convex.

10. The optical lens according to claim 1, wherein: The optical lens further includes a stop, which is disposed between the third lens and the fourth lens.

11. The optical lens according to claim 1, wherein: The first lens is an aspherical lens and / or the sixth lens is an aspherical lens.

12. The optical lens according to claim 1, wherein: The fourth lens and the fifth lens are cemented together to form a cemented lens.

13. The optical lens according to any one of claims 1 to 12, characterized in that: The lens edge slope K(S5) at the maximum field angle of the first side surface of the third lens of the optical lens satisfies: -10≤arctan(1 / K(S5))≤-0.

01.

14. The optical lens according to any one of claims 1 to 12, characterized in that: The central curvature radius R5 of the first side surface of the third lens of the optical lens satisfies the following relationship with the entire focal length value F of the optical lens: -40≤R5 / F≤-10.

15. The optical lens according to any one of claims 1 to 12, characterized in that: The lens edge slope K(S1) at the maximum field angle of the first side surface of the first lens of the optical lens satisfies: 34.212≥arctan(1 / K(S1))≥20; The lens edge slope K(S2) at the maximum field angle of the second side surface of the first lens of the optical lens satisfies: arctan(1 / K(S2))≥25.

16. The optical lens according to any one of claims 1 to 12, characterized in that: A distance d23 between the center of the second side surface of the second lens and the center of the first side surface of the third lens on the optical axis and a distance TTL between the center of the first side surface of the first lens and the imaging surface of the optical lens on the optical axis satisfy the following: 0.001≤d23 / TTL≤0.

038.

17. The optical lens according to any one of claims 1 to 12, characterized in that: The distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, the entire focal length value F of the optical lens and the maximum field of view FOV of the optical lens satisfy the following: 0.01≤TTL / (F*FOV)≤0.

075.

18. The optical lens according to any one of claims 1 to 12, characterized in that: The distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, the entire focal length value F of the optical lens, and the arc value θ of the maximum field of view angle of the optical lens satisfy the following: 2≤TTL / (F*θ)≤3.

19. The optical lens according to any one of claims 1 to 12, characterized in that: The maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: D / H / FOV≤0.

02.

20. The optical lens according to any one of claims 1 to 12, characterized in that: The maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the radian value θ of the maximum field angle of the optical lens satisfy the following: 0.686≤D / H / θ≤1.

21. The optical lens according to any one of claims 1 to 12, characterized in that: The entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following relationship: 1.6≤F / ENPD≤2.

22. The optical lens according to any one of claims 1 to 12, characterized in that: The combined focal length F45 of the fourth lens and the fifth lens of the optical lens satisfies the following relationship with the entire focal length F of the optical lens: 1.8≤F45 / F≤22.

23. The optical lens according to any one of claims 1 to 12, characterized in that: The focal length value F1 of the first lens of the optical lens and the focal length value F of the entire optical lens group satisfy the following: -3≤F1 / F≤-1.

5.

24. The optical lens according to any one of claims 1 to 12, characterized in that: The maximum field of view FOV of the optical lens, the entire focal length value F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following: 84.481≥(FOV×F) / H≥60.

25. The optical lens according to any one of claims 1 to 12, characterized in that: The arc value θ of the maximum field angle of the optical lens, the entire focal length value F of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy the following: 1.474≥(θ×F) / H≥1.

26. The optical lens according to any one of claims 1 to 12, characterized in that: A central curvature radius R5 of the first side surface of the third lens of the optical lens and a distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy the following: -6.991≤R5 / TTL≤-0.

05.

27. The optical lens according to any one of claims 1 to 12, characterized in that: The entire focal length value F of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy the following: 0.3≤(H / 2) / (F*tan(θ / 2))≤0.

8.

28. The optical lens according to any one of claims 1 to 12, characterized in that: A central curvature radius R5 of the first side surface of the third lens of the optical lens and a central curvature radius R6 of the second side surface of the third lens of the optical lens satisfy the following relationship: 0.81≤(R5-R6) / (R5+R6)≤0.

902.

29. The optical lens according to any one of claims 1 to 12, characterized in that: The focal length f5 of the first side surface of the third lens, the focal length f6 of the second side surface of the third lens, and the focal length F3 of the third lens satisfy the following relationship: -18≤(f5+f6) / F3≤-7.

30. The optical lens according to any one of claims 1 to 12, characterized in that: A central curvature radius R1 of a first side surface of the first lens of the optical lens and a central curvature radius R2 of a second side surface of the first lens of the optical lens satisfy the following relationship: 1.887≤R1 / R2≤2.

076.

31. The optical lens according to any one of claims 1 to 12, characterized in that: A central curvature radius R3 of the first side surface of the second lens of the optical lens and a central curvature radius R4 of the second side surface of the second lens of the optical lens satisfy the following relationship: 0.870≤R3 / R4≤1.

191.

32. The optical lens according to any one of claims 1 to 12, characterized in that: A distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis and an entire focal length value F of the optical lens satisfy the following relationship: 4.147≤TTL / F≤5.

33. An electronic device, characterized in that: The optical lens comprises the optical lens according to any one of claims 1 to 32 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images