Optical lens and electronic device

Abstract

This invention provides an optical lens and an electronic device. The optical lens, from first to second side, comprises: a first lens with positive optical power, the second side of which is convex; a second lens with negative optical power, the first side of which is concave; a third lens with positive optical power, the first side of which is concave and the second side convex; a fourth lens with positive optical power, the first side of which is convex and the second side convex; and a fifth lens with positive optical power, the first side of which is convex. This invention solves the problem in existing optical lenses where it is difficult to simultaneously achieve a long back focal length, low distortion, and a large field of view.

Description

Technical Field

[0001] This invention relates to the field of optical imaging equipment technology, and more specifically, to an optical lens and an electronic device. Background Technology

[0002] In recent years, with the development of technology, the demand for optical lenses in daily life has been increasing, and optical lenses are being applied to more and more scenarios. For example, in the automotive industry, for driving safety, more accurate detection of the driving environment is required, making optical lenses a key component for detecting information around the vehicle. With the development of intelligent headlights, the requirements for projection lenses in megapixel headlight applications are constantly increasing, pursuing higher luminous flux, smaller size, and a wider field of view. Unlike ordinary projection lenses, intelligent headlight projection lenses have more specific requirements in terms of driver assistance and safety enhancement.

[0003] Existing optical lenses used in automotive intelligent headlights have various problems, such as: although existing technologies can achieve a resolution of one megapixel, optical lens aberrations such as chromatic aberration, astigmatism, and distortion are quite serious; existing technologies have limited projection field of view, which cannot meet the requirements for a larger projection range; and existing technologies, while miniaturized, have a short back focal length, which cannot provide sufficient space for focusing or installation during module assembly.

[0004] In other words, existing optical lenses suffer from the problem of not being able to simultaneously achieve a long back focal length, low distortion, and a wide field of view. Summary of the Invention

[0005] The main objective of this invention is to provide an optical lens and an electronic device to solve the problem that existing optical lenses cannot simultaneously achieve a long back focal length, small distortion, and a large field of view.

[0006] To achieve the above objectives, according to one aspect of the present invention, an optical lens is provided, comprising, from a first side to a second side, the following components in sequence: a first lens having positive optical power, wherein the second side of the first lens is convex; a second lens having negative optical power, wherein the first side of the second lens is concave; a third lens having positive optical power, wherein the first side of the third lens is concave and the second side is convex; a fourth lens having positive optical power, wherein the first side of the fourth lens is convex and the second side is convex; and a fifth lens having positive optical power, wherein the first side of the fifth lens is convex.

[0007] Furthermore, the first side surface of the first lens is convex.

[0008] Furthermore, the first side surface of the first lens is concave.

[0009] Furthermore, the second side surface of the second lens is concave.

[0010] Furthermore, the second side surface of the second lens is a convex surface.

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

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

[0013] Furthermore, the optical lens also includes an aperture stop, which is positioned between the third lens and the fourth lens.

[0014] Furthermore, the total focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: F / H≥1.2.

[0015] Furthermore, the focal length F1 of the first lens satisfies the following relationship with the total focal length F of the optical lens: F1 / F≥1.

[0016] Furthermore, the sag7 of the first side of the fourth lens and the sag8 of the second side of the fourth lens satisfy the following condition: |sag7 / sag8|≥0.1.

[0017] Furthermore, the center thickness d1 of the first lens and the optical back focal length of the optical lens, i.e., the center distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfy the following: (d1*BFL) / (d1+BFL)≥2.

[0018] Furthermore, the radius of curvature R5 of the first side of the third lens and the total optical length of the optical lens, i.e. the distance TTL from the center of the first side of the first lens to the center of the imaging surface of the optical lens, satisfy the following condition: R5 / TTL≤-0.08.

[0019] Furthermore, the radius of curvature R10 of the second side of the fifth lens and the total optical length of the optical lens, i.e. the distance TTL from the center of the first side of the first lens to the center of the imaging surface of the optical lens, satisfy the following condition: R10 / TTL≥-20.

[0020] Furthermore, the radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy the following condition: |R3 / R4|≤1.5.

[0021] Furthermore, the total focal length F of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: |(HF*θ) / (F*θ)|≤0.009.

[0022] Furthermore, the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the following condition with respect to the optical total length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens: BFL / TTL≥0.3.

[0023] Furthermore, the second side sag6 of the third lens and the air gap d6 between the third lens and the aperture stop satisfy: arctan(sag6 / d6)≤3.5.

[0024] Furthermore, the angle subtended by the second side of the third lens, arctan(1 / K(S6)), satisfies: arctan(1 / K(S6))≥-65.

[0025] Furthermore, the total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following relationship: F / ENPD≤1.6.

[0026] Furthermore, the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, and the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens to the center of the second side of the last lens of the optical lens, satisfy the following condition: BFL / TL≥0.4.

[0027] Furthermore, the effective aperture diameter DST of the aperture stop and the total focal length F of the optical lens satisfy the following condition: DST / F≤2.1.

[0028] Furthermore, the maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following relationship: (FOV×F) / H≥50.

[0029] Furthermore, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: (H / 2) / (F*tan(θ / 2))≤2.1.

[0030] Furthermore, the radius of curvature R4 of the second side surface of the second lens and the radius of curvature R10 of the second side surface of the fifth lens satisfy the following condition: -0.9 ≤ R4 / R10.

[0031] Furthermore, the radius of curvature R6 of the second side surface of the third lens and the radius of curvature R7 of the first side surface of the fourth lens satisfy the following relationship: (R6-R7) / (R6+R7)≥-3.

[0032] Furthermore, the focal length F5 of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: F5 / F≥1.

[0033] Furthermore, the sagitta of the first side of the fourth lens, sag7, the sagitta of the second side of the fourth lens, sag8, the center thickness of the fourth lens, and the air gap d8 between the fourth lens and the fifth lens satisfy the following: (sag7 / d7) / (sag8 / d8)≥-3.7.

[0034] Furthermore, the radius of curvature R4 of the second side surface of the second lens satisfies the following relationship with the total focal length F of the optical lens: |R4 / F|≥0.5.

[0035] Furthermore, the radius of curvature R10 of the second side of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: |R10 / F|≥1.3.

[0036] Furthermore, the optical back focal length of the optical lens, that is, the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the following condition with respect to the focal length F2 of the second lens: BFL / F2≤-0.01.

[0037] According to another aspect of the present invention, an optical lens is provided, comprising, from a first side to a second side,: a first lens having positive optical power; a second lens having negative optical power; a third lens having positive optical power; a fourth lens having positive optical power; and a fifth lens having positive optical power; wherein the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, and the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens to the center of the second side of the last lens of the optical lens, satisfy the condition: BFL / TL≥0.4.

[0038] Furthermore, the first side surface of the first lens is convex, and the second side surface is convex.

[0039] Furthermore, the first side surface of the first lens is concave, and the second side surface is convex.

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

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

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

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

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

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

[0046] Furthermore, the optical lens also includes an aperture stop, which is positioned between the third lens and the fourth lens.

[0047] Furthermore, the total focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: F / H≥1.2.

[0048] Furthermore, the focal length F1 of the first lens satisfies the following relationship with the total focal length F of the optical lens: F1 / F≥1.

[0049] Furthermore, the sag7 of the first side of the fourth lens and the sag8 of the second side of the fourth lens satisfy the following condition: |sag7 / sag8|≥0.1.

[0050] Furthermore, the center thickness d1 of the first lens and the optical back focal length of the optical lens, i.e., the center distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfy the following: (d1*BFL) / (d1+BFL)≥2.

[0051] Furthermore, the radius of curvature R5 of the first side of the third lens and the total optical length of the optical lens, i.e. the distance TTL from the center of the first side of the first lens to the center of the imaging surface of the optical lens, satisfy the following condition: R5 / TTL≤-0.08.

[0052] Furthermore, the radius of curvature R10 of the second side of the fifth lens and the total optical length of the optical lens, i.e. the distance TTL from the center of the first side of the first lens to the center of the imaging surface of the optical lens, satisfy the following condition: R10 / TTL≥-20.

[0053] Furthermore, the radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy the following condition: |R3 / R4|≤1.5.

[0054] Furthermore, the total focal length F of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: |(HF*θ) / (F*θ)|≤0.009.

[0055] Furthermore, the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the following condition with respect to the optical total length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens: BFL / TTL≥0.3.

[0056] Furthermore, the second side sag6 of the third lens and the air gap d6 between the third lens and the aperture stop satisfy: arctan(sag6 / d6)≤3.5.

[0057] Furthermore, the angle subtended by the second side of the third lens, arctan(1 / K(S6)), satisfies: arctan(1 / K(S6))≥-65.

[0058] Furthermore, the total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following relationship: F / ENPD≤1.6.

[0059] Furthermore, the effective aperture diameter DST of the aperture stop and the total focal length F of the optical lens satisfy the following condition: DST / F≤2.1.

[0060] Furthermore, the maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following relationship: (FOV×F) / H≥50.

[0061] Furthermore, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: (H / 2) / (F*tan(θ / 2))≤2.1.

[0062] Furthermore, the radius of curvature R4 of the second side surface of the second lens and the radius of curvature R10 of the second side surface of the fifth lens satisfy the following condition: -0.9 ≤ R4 / R10.

[0063] Furthermore, the radius of curvature R6 of the second side surface of the third lens and the radius of curvature R7 of the first side surface of the fourth lens satisfy the following relationship: (R6-R7) / (R6+R7)≥-3.

[0064] Furthermore, the focal length F5 of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: F5 / F≥1.

[0065] Furthermore, the sagitta of the first side of the fourth lens, sag7, the sagitta of the second side of the fourth lens, sag8, the center thickness of the fourth lens, and the air gap d8 between the fourth lens and the fifth lens satisfy the following: (sag7 / d7) / (sag8 / d8)≥-3.7.

[0066] Furthermore, the radius of curvature R4 of the second side surface of the second lens satisfies the following relationship with the total focal length F of the optical lens: |R4 / F|≥0.5.

[0067] Furthermore, the radius of curvature R10 of the second side of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: |R10 / F|≥1.3.

[0068] Furthermore, the optical back focal length of the optical lens, that is, the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the following condition with respect to the focal length F2 of the second lens: BFL / F2≤-0.01.

[0069] According to another aspect of the present invention, an electronic device is provided, including the aforementioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0070] According to the technical solution of the present invention, the optical lens includes, from the first side to the second side, a first lens with positive optical power, a second lens with negative optical power, a third lens with positive optical power, a fourth lens with positive optical power, and a fifth lens with positive optical power. The second side of the first lens is convex; the first side of the second lens is concave; the first side of the third lens is concave and the second side is convex; the first side of the fourth lens is convex and the second side is convex; and the first side of the fifth lens is convex.

[0071] The first lens has positive optical power. Its first side can be either convex or concave, and its second side is convex. When the first side is convex, the positive optical power converges light rays, effectively converging central and peripheral rays from various fields of view, increasing system illumination. A convex first side also improves aesthetics, facilitates cleaning, and reduces dust accumulation. A convex second side further converges and collects light, facilitating adjustments to peripheral field of view by the subsequent system. When the first side is concave, the positive optical power also converges light rays, effectively converging central and peripheral rays from various fields of view, increasing system illumination. A concave first side is advantageous for special design requirements, while a convex second side helps to smooth light paths and reduce sensitivity.

[0072] The second lens has negative optical power. Its first side is concave, while its second side can be either concave or convex. When the second side is concave, the negative optical power further diverges the light, adjusting the light refraction angle and reducing chromatic aberration. This double-concave design helps reduce system sensitivity. The concave first side, in conjunction with the first lens, collects and converges light rays from the edge of the field of view. The concave second side helps to lengthen the optical back focal length, diverging the converged light rays and facilitating the reception of edge field-of-view light by the rear optical system, thus increasing the system's light transmission capability. When the second side is convex, the negative optical power further diverges the light, adjusting the light refraction angle and reducing chromatic aberration, allowing the diverged light rays to smoothly enter the rear, further smoothing the light path transition. The concave first side, in conjunction with the first lens, collects and converges light rays from the edge of the field of view. The convex second side adjusts the light divergence angle, helping to smooth the light path and reduce the sensitivity of the rear optical system.

[0073] The third lens has positive optical power. The first side of the third lens is concave, and the second side is convex. The shape of the third lens is a meniscus lens convex towards the second side. The concave surface of the first side helps to collect the light rays passing through the second lens, while the convex surface of the second side converges the light rays, allowing the light rays to smoothly transition into the aperture, reducing the light angle and decreasing the sensitivity of the rear optical system.

[0074] The fourth lens has positive optical power. The first and second sides of the fourth lens are convex. The positive optical power combined with the convex-convex shape can work with the aperture to further narrow the light angle, making it easier for the rear optical system to collect light rays from the edge of the field of view, reducing system aberrations, and improving system illumination.

[0075] The fifth lens has positive optical power. Its first side is convex, and its second side can be either concave or convex. When the second side is concave, the positive optical power combined with a meniscus lens convex to the first side converges light rays, effectively converging central and peripheral rays from various fields of view, increasing system illumination. With a convex first side, it converges light rays and increases system illumination, while the concave second side further alters the light refraction angle, increasing the telecentricity of the principal ray and converging the light onto the image plane. When the second side is convex, the positive optical power combined with a biconvex shape converges light rays, effectively converging central and peripheral rays from various fields of view, increasing system illumination. The convex first side converges light rays and increases system illumination, while the convex second side facilitates a longer back focal length, simplifying module assembly and focal length adjustment.

[0076] This application employs five lenses. By optimizing the optical power and surface shape of each lens, the optical lens of this invention has at least one beneficial effect, such as a long back focal length, small distortion, and a large field of view. Attached Figure Description

[0077] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0078] Figure 1 A schematic diagram of the structure of an optical lens of Example 1 of the present invention is shown;

[0079] Figure 2 A schematic diagram of the structure of the optical lens of Example 2 of the present invention is shown;

[0080] Figure 3 A schematic diagram of the structure of the optical lens of Example 3 of the present invention is shown;

[0081] Figure 4 A schematic diagram of the structure of the optical lens of Example 4 of the present invention is shown;

[0082] Figure 5 A schematic diagram of the structure of the optical lens of Example 5 of the present invention is shown;

[0083] Figure 6 A schematic diagram of the structure of the optical lens of Example Six of the present invention is shown;

[0084] Figure 7 A schematic diagram of the structure of the optical lens of Example Seven of the present invention is shown;

[0085] Figure 8 A schematic diagram of the structure of the optical lens of Example 8 of the present invention is shown.

[0086] The above figures include the following reference numerals:

[0087] 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 stop; L4, Fourth lens; S8, First side surface of the fourth lens; S9, Second side surface of the fourth lens; L5, Fifth lens; S10, First side surface of the fifth lens; S11, Second side surface of the fifth lens; S12, First side surface of the protective glass; S13, Second side surface of the protective glass; IMA, Imaging plane. Detailed Implementation

[0088] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0089] 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 one of ordinary skill in the art to which this application pertains.

[0090] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0091] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0092] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0093] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the first side is called the first side surface of the lens, and the surface of each lens closest to the second side is called the second side surface of the lens. The surface shape in the paraxial region can be determined according to the judgment method commonly known in the field, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens database of optical software) to determine concavity or convexity. For the first side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the second side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0094] It should be noted that the left side of the optical lens is the first side, and the right side of the optical lens is the second side.

[0095] In an exemplary embodiment, the optical lens provided in this application can be used as a vehicle-mounted lens. For a vehicle-mounted lens, the left side is the object side, and the right side is the image side; the first side is also the object side, and the second side is also the image side. Light rays from the object side can form an image on the image side.

[0096] When the optical lens of this application is applied to a projection lens or a radar transmitting lens, the left side is the imaging side and the right side is the image source side. In an exemplary embodiment, the optical lens provided by this application can be used as, for example, a projection lens or a lidar transmitting lens. In this case, the image side of the optical lens can be the image source side, and the object side can be the imaging side. Light rays from the image source side can be imaged on the imaging side, and the imaging surface of the optical lens is the image source surface.

[0097] To address the problem that existing optical lenses cannot simultaneously achieve a long back focal length, low distortion, and a large field of view, this invention provides an optical lens and an electronic device.

[0098] Example 1

[0099] like Figures 1 to 8As shown, the optical lens includes, from the first side to the second side, a first lens with positive optical power, a second lens with negative optical power, a third lens with positive optical power, a fourth lens with positive optical power, and a fifth lens with positive optical power. The second side of the first lens is convex; the first side of the second lens is concave; the first side of the third lens is concave and the second side is convex; the first side of the fourth lens is convex and the second side is convex; and the first side of the fifth lens is convex.

[0100] The first lens has positive optical power. Its first side can be either convex or concave, and its second side is convex. When the first side is convex, the positive optical power converges light rays, effectively converging central and peripheral rays from various fields of view, increasing system illumination. A convex first side also improves aesthetics, facilitates cleaning, and reduces dust accumulation. A convex second side further converges and collects light, facilitating adjustments to peripheral field of view by the subsequent system. When the first side is concave, the positive optical power also converges light rays, effectively converging central and peripheral rays from various fields of view, increasing system illumination. A concave first side is advantageous for special design requirements, while a convex second side helps to smooth light paths and reduce sensitivity.

[0101] The second lens has negative optical power. Its first side is concave, while its second side can be either concave or convex. When the second side is concave, the negative optical power further diverges the light, adjusting the light refraction angle and reducing chromatic aberration. This double-concave design helps reduce system sensitivity. The concave first side, in conjunction with the first lens, collects and converges light rays from the edge of the field of view. The concave second side helps to lengthen the optical back focal length, diverging the converged light rays and facilitating the reception of edge field-of-view light by the rear optical system, thus increasing the system's light transmission capability. When the second side is convex, the negative optical power further diverges the light, adjusting the light refraction angle and reducing chromatic aberration, allowing the diverged light rays to smoothly enter the rear, further smoothing the light path transition. The concave first side, in conjunction with the first lens, collects and converges light rays from the edge of the field of view. The convex second side adjusts the light divergence angle, helping to smooth the light path and reduce the sensitivity of the rear optical system.

[0102] The third lens has positive optical power. The first side of the third lens is concave, and the second side is convex. The shape of the third lens is a meniscus lens convex towards the second side. The concave surface of the first side helps to collect the light rays passing through the second lens, while the convex surface of the second side converges the light rays, allowing the light rays to smoothly transition into the aperture, reducing the light angle and decreasing the sensitivity of the rear optical system.

[0103] The fourth lens has positive optical power. The first and second sides of the fourth lens are convex. The positive optical power combined with the convex-convex shape can work with the aperture to further narrow the light angle, making it easier for the rear optical system to collect light rays from the edge of the field of view, reducing system aberrations, and improving system illumination.

[0104] The fifth lens has positive optical power. Its first side is convex, and its second side can be either concave or convex. When the second side is concave, the positive optical power combined with a meniscus lens convex to the first side converges light rays, effectively converging central and peripheral rays from various fields of view, increasing system illumination. With a convex first side, it converges light rays and increases system illumination, while the concave second side further alters the light refraction angle, increasing the telecentricity of the principal ray and converging the light onto the image plane. When the second side is convex, the positive optical power combined with a biconvex shape converges light rays, effectively converging central and peripheral rays from various fields of view, increasing system illumination. The convex first side converges light rays and increases system illumination, while the convex second side facilitates a longer back focal length, simplifying module assembly and focal length adjustment.

[0105] This application employs five lenses. By optimizing the optical power and surface shape of each lens, the optical lens of this invention has at least one beneficial effect, such as a long back focal length, small distortion, and a large field of view.

[0106] In this embodiment, the first side surface of the first lens is convex. Positive optical power has a converging effect on light, which can effectively converge the central and peripheral light rays of each field of view, increasing the system illumination; the convex surface of the first side surface is beneficial to the appearance, easy to clean, and less prone to dust accumulation. The second side surface is convex, which further converges and collects light, making it easier for the rear system to adjust the light rays in the peripheral field of view.

[0107] In this embodiment, the first side of the first lens is concave. Positive optical power has a converging effect on light, effectively converging the central and peripheral light rays from each field of view, increasing the system illumination; the concave first side is beneficial for special shape requirements, while the convex second side helps to smooth the light path and reduce sensitivity.

[0108] In this embodiment, the second side of the second lens is concave. Negative optical power further diverges the light, adjusts the light refraction angle, reduces chromatic aberration, and the double concave shape helps reduce system sensitivity. The concave surface of the first side, in conjunction with the first lens, collects and converges light rays from the edge field of view. The concave surface of the second side helps to lengthen the optical back focal length, diverges the converged light rays, facilitates the reception of edge field of view light rays by the rear optical system, and increases the system's light transmission capability.

[0109] In this embodiment, the second side of the second lens is convex. Negative optical power further diverges the light, adjusts the light refraction angle, reduces chromatic aberration, and allows the diverged light to smoothly enter the rear, further smoothing the light path transition. The concave surface of the first side, in conjunction with the first lens, can collect and converge the light from the edge field of view. The convex surface of the second side adjusts the light divergence angle, which helps to smooth the light path and reduce the sensitivity of the rear optical system.

[0110] In this embodiment, the second side of the fifth lens is concave. The positive optical power combined with the meniscus lens convex to the first side has a converging effect on light, which can effectively converge the central and edge rays of each field of view, increasing the system illumination; the first side is convex, which converges light and increases the system illumination, while the second side is concave, which further changes the light deflection angle, increases the telecentricity of the principal ray, and converges the light onto the imaging plane.

[0111] In this embodiment, the second side of the fifth lens is convex. The positive optical power combined with the double convex shape has a converging effect on light, which can effectively converge the central and edge light rays of each field of view, increasing the system illumination; the first side is convex, which converges light rays and increases the system illumination, while the second side is convex, which is beneficial for elongating the back focal length, facilitating module assembly and focal length adjustment.

[0112] In this embodiment, the optical lens also includes an aperture stop, which is disposed between the third lens and the fourth lens. The aperture stop's location between the third and fourth lenses facilitates a smoother light path entering the optical system, reduces the lens aperture at the rear of the optical system, and lowers the system's assembly sensitivity.

[0113] In this embodiment, the total focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the condition: F / H ≥ 1.2. Satisfying this condition ensures that the focal length and image height are controlled within a certain range, which is beneficial to improving resolution. Preferably, F / H ≥ 2.

[0114] In this embodiment, the focal length F1 of the first lens and the total focal length F of the optical lens satisfy the condition: F1 / F ≥ 1. Satisfying this condition facilitates the rational allocation of the focal length of the first lens and allows light rays with a large field of view to enter the optical system. Preferably, F1 / F ≥ 1.5.

[0115] In this embodiment, the sagitta of the first side surface of the fourth lens, sag7, and the sagitta of the second side surface of the fourth lens, sag8, satisfy the condition: |sag7 / sag8|≥0.1. Satisfying this condition ensures that the sagitta of the two sides of the fourth lens are close, which is beneficial for smooth light transition and effectively reduces system aberrations, achieving low distortion. Preferably, |sag7 / sag8|≥0.2.

[0116] In this embodiment, the center thickness d1 of the first lens and the optical back focal length (i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane) satisfy the condition: (d1*BFL) / (d1+BFL)≥2. Satisfying this condition helps balance the ratio of the back focal length to the spacing between the first and second lenses, increasing assembly yield. It also helps ensure the optical lens has sufficient back focal length to accommodate other optical components, increasing design flexibility. Preferably, (d1*BFL) / (d1+BFL)≥3.5.

[0117] In this embodiment, the radius of curvature R5 of the first side surface of the third lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side surface of the first lens to the center of the imaging plane of the optical lens, satisfy the condition: R5 / TTL ≤ -0.08. Satisfying this condition allows the relative position of the pupil image of the secondary reflection ghost image on the focal plane to be changed. By controlling the radius of curvature, 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. Preferably, R5 / TTL ≤ -0.3.

[0118] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, satisfy the condition: R10 / TTL ≥ -20. By controlling this condition, the relative position of the pupil image of the secondary reflection ghost image on the focal plane can be changed. By controlling the radius of curvature, 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. Preferably, R10 / TTL ≥ -15.

[0119] In this embodiment, the radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy the condition: |R3 / R4|≤1.5. Controlling the radius of curvature of both sides of the second lens within this range is beneficial for collecting more light and increasing the light transmission capability of the system. Preferably, |R3 / R4|≤0.6.

[0120] In this embodiment, the overall focal length F of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: |(HF*θ) / (F*θ)|≤0.009. Satisfying this condition ensures that, while keeping the field of view and image plane size constant, increasing the focal length of the optical lens enhances the imaging effect in the central region of the image plane. Preferably, |(HF*θ) / (F*θ)|≤0.007.

[0121] In this embodiment, the optical back focal length (BFL), i.e., the distance from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the condition that BFL / TTL ≥ 0.3 with respect to the total optical length of the optical lens (TTL), i.e., the distance from the center of the first side of the first lens to the center of the imaging plane. This condition satisfies the specific requirements for the back focal length of the optical lens and also provides space for the installation and focusing of optical components, avoiding mechanical interference. Preferably, BFL / TTL ≥ 0.42.

[0122] In this embodiment, the sagitta (sag6) of the second side surface of the third lens and the air gap (d6) between the third lens and the aperture stop satisfy the condition: arctan(sag6 / d6) ≤ 3.5. Satisfying this condition helps to improve illumination and reduce distortion. Preferably, arctan(sag6 / d6) ≤ 2.

[0123] In this embodiment, the angle subtended by the second side of the third lens, arctan(1 / K(S6)), satisfies: arctan(1 / K(S6)) ≥ -65°. Satisfying this condition ensures a large angle subtended by the second side of the third lens, which is beneficial for the rapid focusing of large-angle peripheral light rays entering through the third lens, thus improving image quality. Preferably, arctan(1 / K(S6)) ≥ -55°.

[0124] In this embodiment, the overall focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the condition: F / ENPD ≤ 1.6. Satisfying this condition is beneficial for achieving a small FNO and increasing the light transmission. Preferably, F / ENPD ≤ 1.45.

[0125] In this embodiment, the optical back focal length (BFL), i.e., the distance from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the condition that BFL / TL ≥ 0.4 with respect to the lens group length of the optical lens (i.e., the distance from the center of the first side of the first lens to the center of the second side of the last lens of the optical lens). Satisfying this condition ensures a long back focal length while achieving miniaturization, which is beneficial for module assembly. Preferably, BFL / TL ≥ 0.6.

[0126] In this embodiment, the effective aperture diameter (DST) of the aperture stop and the total focal length (F) of the optical lens satisfy the condition: DST / F ≤ 2.1. Satisfying this condition ensures a larger ratio between the aperture diameter and the effective focal length, resulting in a larger aperture for the optical lens. Preferably, DST / F ≤ 1.4.

[0127] In this embodiment, the maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the condition: (FOV×F) / H≥50. Satisfying this condition allows for the simultaneous achievement of both large angular resolution and a large field of view. Preferably, (FOV×F) / H≥54.

[0128] In this embodiment, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: (H / 2) / (F*tan(θ / 2))≤2.1. By reasonably setting the ratio of the actual image height to the ideal image height, a large angular resolution can be achieved. Preferably, (H / 2) / (F*tan(θ / 2))≤1.2.

[0129] In this embodiment, the radius of curvature R4 of the second side surface of the second lens and the radius of curvature R10 of the second side surface of the fifth lens satisfy the condition: -0.9 ≤ R4 / R10. By adjusting the R value of the key surface shape, the second side surface of the second lens is concave, which has a diverging effect on light, resulting in a larger optical path at the edge of the field of view; in conjunction with setting the second side surface of the fifth lens to be concave, it deflects light, thereby lengthening the back focal length. Preferably, -0.85 ≤ R4 / R10.

[0130] In this embodiment, the radius of curvature R6 of the second side surface of the third lens and the radius of curvature R7 of the first side surface of the fourth lens satisfy the condition: (R6-R7) / (R6+R7)≥-3. Satisfying this condition ensures that when light rays exiting the third lens enter the first surface of the fourth lens, the incident light is relatively smooth, thereby reducing the tolerance sensitivity of the optical system. Preferably, (R6-R7) / (R6+R7)≥-2.

[0131] In this embodiment, the focal length F5 of the fifth lens satisfies the condition F5 / F≥1 with the total focal length F of the optical lens. Satisfying this condition facilitates the rational allocation of the focal length of the fifth lens and allows light rays with a large field of view to enter the optical system, thereby improving resolving power. Preferably, F5 / F≥1.5.

[0132] In this embodiment, the sagitta of the first side of the fourth lens (sag7), the sagitta of the second side of the fourth lens (sag8), the center thickness of the fourth lens (d7), and the air gap (d8) between the fourth and fifth lenses satisfy the following condition: (sag7 / d7) / (sag8 / d8) ≥ -3.7. Setting the two sides of the fourth lens to have similar shapes allows for a smooth transition of peripheral light, which helps reduce the lens's sensitivity. Preferably, (sag7 / d7) / (sag8 / d8) ≥ -2.8.

[0133] In this embodiment, the radius of curvature R4 of the second side surface of the second lens satisfies the condition |R4 / F|≥0.5 with the overall focal length F of the optical lens. By appropriately setting the radius of curvature of the second side surface of the second lens, it is beneficial to adjust the light divergence angle, smooth the light path, reduce the sensitivity of the rear optical system, and increase the light transmission capability of the system. Preferably, |R4 / F|≥0.88.

[0134] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens satisfies the following relationship with the overall focal length F of the optical lens: |R10 / F|≥1.3. By reasonably setting the radius of curvature of the second side surface of the fifth lens, the light deflection angle is changed, which is beneficial for elongating the back focal length, facilitating module assembly and focal length adjustment. Preferably, |R10 / F|≥2.

[0135] In this embodiment, the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the following condition with respect to the focal length F2 of the second lens: BFL / F2 ≤ -0.01. By setting the optical power of the second lens to negative, the light rays are sufficiently diverged after passing through the second lens, which is beneficial for increasing the angle of the principal ray. Therefore, a long back focal length is set to allow the light rays to converge better on the imaging plane. Preferably, BFL / F2 ≤ -0.3.

[0136] Example 2

[0137] like Figures 1 to 8 As shown, the optical lens, from the first side to the second side, sequentially includes: a first lens with positive optical power; a second lens with negative optical power; a third lens with positive optical power; a fourth lens with positive optical power; and a fifth lens with positive optical power. The optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens element to the center of the imaging plane, and the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens to the center of the second side of the last lens element, satisfy the condition: BFL / TL ≥ 0.4. Satisfying this condition meets the special requirements for the back focal length of the optical lens and also provides space for the installation and focusing of optical components, avoiding mechanical interference. Preferably, BFL / TL ≥ 0.6.

[0138] In this embodiment, the first side surface of the first lens is convex, and the second side surface is convex. Positive optical power has a converging effect on light, which can effectively converge the central and peripheral light rays of each field of view, increasing the system illumination; the convex first side surface is aesthetically pleasing, easy to clean, and less prone to dust accumulation; the convex second side surface further converges and collects light, facilitating the adjustment of peripheral field of view light by the rear system.

[0139] In this embodiment, the first side of the first lens is concave, and the second side is convex. Positive optical power has a converging effect on light, effectively converging the central and peripheral light rays from each field of view, increasing the system illumination; the concave first side is beneficial for special shape requirements, while the convex second side helps to smooth the light path and reduce sensitivity.

[0140] In this embodiment, the first side of the second lens is concave, and the second side is concave. The negative optical power further diverges the light, adjusts the light refraction angle, reduces chromatic aberration, and the double concave shape helps reduce system sensitivity. The concave surface of the first side, in conjunction with the first lens, collects and converges light rays from the edge field of view. The concave surface of the second side helps to lengthen the optical back focal length, diverges the converged light rays, facilitates the reception of edge field of view light rays by the rear optical system, and increases the system's light transmission capability.

[0141] In this embodiment, the first side of the second lens is concave, and the second side is convex. Negative optical power further diverges the light, adjusts the light refraction angle, reduces chromatic aberration, and allows the diverged light to smoothly enter the rear, further smoothing the light path transition. The concave surface of the first side, in conjunction with the first lens, can collect and converge light from the edge field of view. The convex surface of the second side adjusts the light divergence angle, which helps to smooth the light path and reduce the sensitivity of the rear optical system.

[0142] In this embodiment, the first side of the third lens is concave, and the second side is convex. The third lens is shaped like a meniscus lens convex to the second side. The concave surface of the first side helps to collect light rays passing through the second lens, while the convex surface of the second side converges the light rays, allowing the light rays to smoothly transition into the aperture, reducing the light beam angle and lowering the sensitivity of the rear optical system.

[0143] In this embodiment, the first side surface of the fourth lens is convex, and the second side surface is also convex. The positive optical power is matched with a convex-convex shape, which can work with the aperture to further narrow the light angle, making it easier for the rear optical system to collect light from the edge field of view, reducing system aberrations, and improving system illumination.

[0144] In this embodiment, the first side of the fifth lens is convex, and the second side is concave. The positive optical power, combined with the meniscus lens convex to the first side, has a converging effect on light, effectively converging the central and peripheral rays of each field of view, increasing the system illumination; the first side being convex, converging light and increasing system illumination, and the second side being concave, further changing the light refraction angle, increasing the telecentricity of the principal ray, and converging the light onto the imaging plane.

[0145] In this embodiment, the first side surface of the fifth lens is convex, and the second side surface is convex. The positive optical power combined with the double convex shape has a converging effect on light, which can effectively converge the central and edge light rays of each field of view, increasing the system illumination. The first side surface is convex, which converges light rays and increases the system illumination, while the second side surface is convex, which is beneficial for elongating the back focal length, facilitating module assembly and focal length adjustment.

[0146] This application employs five lenses. By optimizing the optical power and surface shape of each lens, the optical lens of this invention has at least one beneficial effect, such as a long back focal length, small distortion, and a large field of view.

[0147] In this embodiment, the optical lens also includes an aperture stop, which is disposed between the third lens and the fourth lens. The aperture stop's location between the third and fourth lenses facilitates a smoother light path entering the optical system, reduces the lens aperture at the rear of the optical system, and lowers the system's assembly sensitivity.

[0148] In this embodiment, the total focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the condition: F / H ≥ 1.2. Satisfying this condition ensures that the focal length and image height are controlled within a certain range, which is beneficial to improving resolution. Preferably, F / H ≥ 2.

[0149] In this embodiment, the focal length F1 of the first lens and the total focal length F of the optical lens satisfy the condition: F1 / F ≥ 1. Satisfying this condition facilitates the rational allocation of the focal length of the first lens and allows light rays with a large field of view to enter the optical system. Preferably, F1 / F ≥ 1.5.

[0150] In this embodiment, the sagitta of the first side surface of the fourth lens, sag7, and the sagitta of the second side surface of the fourth lens, sag8, satisfy the condition: |sag7 / sag8|≥0.1. Satisfying this condition ensures that the sagitta of the two sides of the fourth lens are close, which is beneficial for smooth light transition and effectively reduces system aberrations, achieving low distortion. Preferably, |sag7 / sag8|≥0.2.

[0151] In this embodiment, the center thickness d1 of the first lens and the optical back focal length (i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane) satisfy the condition: (d1*BFL) / (d1+BFL)≥2. Satisfying this condition helps balance the ratio of the back focal length to the spacing between the first and second lenses, increasing assembly yield. It also helps ensure the optical lens has sufficient back focal length to accommodate other optical components, increasing design flexibility. Preferably, (d1*BFL) / (d1+BFL)≥3.5.

[0152] In this embodiment, the radius of curvature R5 of the first side surface of the third lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side surface of the first lens to the center of the imaging plane of the optical lens, satisfy the condition: R5 / TTL ≤ -0.08. Satisfying this condition allows the relative position of the pupil image of the secondary reflection ghost image on the focal plane to be changed. By controlling the radius of curvature, 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. Preferably, R5 / TTL ≤ -0.3.

[0153] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, satisfy the condition: R10 / TTL ≥ -20. By controlling this condition, the relative position of the pupil image of the secondary reflection ghost image on the focal plane can be changed. By controlling the radius of curvature, 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. Preferably, R10 / TTL ≥ -15.

[0154] In this embodiment, the radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy the condition: |R3 / R4|≤1.5. Controlling the radius of curvature of both sides of the second lens within this range is beneficial for collecting more light and increasing the light transmission capability of the system. Preferably, |R3 / R4|≤0.6.

[0155] In this embodiment, the overall focal length F of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: |(HF*θ) / (F*θ)|≤0.009. Satisfying this condition ensures that, while keeping the field of view and image plane size constant, increasing the focal length of the optical lens enhances the imaging effect in the central region of the image plane. Preferably, |(HF*θ) / (F*θ)|≤0.007.

[0156] In this embodiment, the optical back focal length (BFL), i.e., the distance from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the condition that BFL / TTL ≥ 0.3 with respect to the total optical length of the optical lens (TTL), i.e., the distance from the center of the first side of the first lens to the center of the imaging plane. This condition satisfies the specific requirements for the back focal length of the optical lens and also provides space for the installation and focusing of optical components, avoiding mechanical interference. Preferably, BFL / TTL ≥ 0.42.

[0157] In this embodiment, the sagitta (sag6) of the second side surface of the third lens and the air gap (d6) between the third lens and the aperture stop satisfy the condition: arctan(sag6 / d6) ≤ 3.5. Satisfying this condition helps to improve illumination and reduce distortion. Preferably, arctan(sag6 / d6) ≤ 2.

[0158] In this embodiment, the angle subtended by the second side of the third lens, arctan(1 / K(S6)), satisfies: arctan(1 / K(S6)) ≥ -65°. Satisfying this condition ensures a large angle subtended by the second side of the third lens, which is beneficial for the rapid focusing of large-angle peripheral light rays entering through the third lens, thus improving image quality. Preferably, arctan(1 / K(S6)) ≥ -55°.

[0159] In this embodiment, the overall focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the condition: F / ENPD ≤ 1.6. Satisfying this condition is beneficial for achieving a small FNO and increasing the light transmission. Preferably, F / ENPD ≤ 1.45.

[0160] In this embodiment, the effective aperture diameter (DST) of the aperture stop and the total focal length (F) of the optical lens satisfy the condition: DST / F ≤ 2.1. Satisfying this condition ensures a larger ratio between the aperture diameter and the effective focal length, resulting in a larger aperture for the optical lens. Preferably, DST / F ≤ 1.4.

[0161] In this embodiment, the maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the condition: (FOV×F) / H≥50. Satisfying this condition allows for the simultaneous achievement of both large angular resolution and a large field of view. Preferably, (FOV×F) / H≥54.

[0162] In this embodiment, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: (H / 2) / (F*tan(θ / 2))≤2.1. By reasonably setting the ratio of the actual image height to the ideal image height, a large angular resolution can be achieved. Preferably, (H / 2) / (F*tan(θ / 2))≤1.2.

[0163] In this embodiment, the radius of curvature R4 of the second side surface of the second lens and the radius of curvature R10 of the second side surface of the fifth lens satisfy the condition: -0.9 ≤ R4 / R10. By adjusting the R value of the key surface shape, the second side surface of the second lens is concave, which has a diverging effect on light, resulting in a larger optical path at the edge of the field of view; in conjunction with setting the second side surface of the fifth lens to be concave, it deflects light, thereby lengthening the back focal length. Preferably, -0.85 ≤ R4 / R10.

[0164] In this embodiment, the radius of curvature R6 of the second side surface of the third lens and the radius of curvature R7 of the first side surface of the fourth lens satisfy the condition: (R6-R7) / (R6+R7)≥-3. Satisfying this condition ensures that when light rays exiting the third lens enter the first surface of the fourth lens, the incident light is relatively smooth, thereby reducing the tolerance sensitivity of the optical system. Preferably, (R6-R7) / (R6+R7)≥-2.

[0165] In this embodiment, the focal length F5 of the fifth lens satisfies the condition F5 / F≥1 with the total focal length F of the optical lens. Satisfying this condition facilitates the rational allocation of the focal length of the fifth lens and allows light rays with a large field of view to enter the optical system, thereby improving resolving power. Preferably, F5 / F≥1.5.

[0166] In this embodiment, the sagitta of the first side of the fourth lens (sag7), the sagitta of the second side of the fourth lens (sag8), the center thickness of the fourth lens (d7), and the air gap (d8) between the fourth and fifth lenses satisfy the following condition: (sag7 / d7) / (sag8 / d8) ≥ -3.7. Setting the two sides of the fourth lens to have similar shapes allows for a smooth transition of peripheral light, which helps reduce the lens's sensitivity. Preferably, (sag7 / d7) / (sag8 / d8) ≥ -2.8.

[0167] In this embodiment, the radius of curvature R4 of the second side surface of the second lens satisfies the condition |R4 / F|≥0.5 with the overall focal length F of the optical lens. By appropriately setting the radius of curvature of the second side surface of the second lens, it is beneficial to adjust the light divergence angle, smooth the light path, reduce the sensitivity of the rear optical system, and increase the light transmission capability of the system. Preferably, |R4 / F|≥0.88.

[0168] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens satisfies the following relationship with the overall focal length F of the optical lens: |R10 / F|≥1.3. By reasonably setting the radius of curvature of the second side surface of the fifth lens, the light deflection angle is changed, which is beneficial for elongating the back focal length, facilitating module assembly and focal length adjustment. Preferably, |R10 / F|≥2.

[0169] In this embodiment, the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the following condition with respect to the focal length F2 of the second lens: BFL / F2 ≤ -0.01. By setting the optical power of the second lens to negative, the light rays are sufficiently diverged after passing through the second lens, which is beneficial for increasing the angle of the principal ray. Therefore, a long back focal length is set to allow the light rays to converge better on the imaging plane. Preferably, BFL / F2 ≤ -0.3.

[0170] Optionally, the aforementioned optical lens may also include a color filter for correcting color deviation and a protective glass for protecting the photosensitive element located on the imaging surface.

[0171] The optical lens in this application may employ multiple lenses, such as the five lenses mentioned above. This application does not specifically limit the number of spherical and aspherical lenses; when image quality is a primary concern, the number of aspherical lenses can be increased. The characteristic of an aspherical lens is that its curvature changes continuously from the lens center to the lens periphery. Unlike a spherical lens, which has a constant curvature from the lens center to the lens periphery, an aspherical lens has superior curvature radius characteristics, offering advantages in improving distortion and astigmatism. By using aspherical lenses, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality.

[0172] In this exemplary embodiment, the solution is not limited to plastic or glass for the lenses. If temperature performance is a primary concern, the first, second, third, fourth, and fifth lenses can all be glass lenses. Optical lenses made of glass can suppress the shift in the back focus of the optical lens due to temperature changes, thereby improving system stability. Simultaneously, using glass can prevent lens blurring caused by high and low temperature variations in the operating environment, thus avoiding impact on the normal use of the optical lens. For example, an all-glass optical lens has a wider temperature range, maintaining stable optical performance within the range of -40℃ to 105℃. Specifically, when resolution and reliability are of primary concern, the first to fifth lenses can all be aspherical glass lenses. Of course, in applications with lower temperature stability requirements, the first to fifth lenses in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce manufacturing costs. Alternatively, the first to fifth lenses in the optical lens can also be made of a combination of plastic and glass.

[0173] This application also provides an electronic device, including the aforementioned optical lens and an imaging element that converts the optical image formed by the optical lens into an electrical signal. The imaging element may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The electronic device may be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. This electronic device is equipped with the optical lens described above.

[0174] However, those skilled in the art will understand that the number of lenses constituting the optical lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although five lenses are described as an example in the embodiments, the optical lens is not limited to including five lenses. If necessary, the optical lens may also include other numbers of lenses.

[0175] The following description, with reference to the accompanying drawings, further illustrates examples of specific surface shapes and parameters of optical lenses applicable to the above embodiments.

[0176] It should be noted that any of the examples one through eight below are applicable to all embodiments of this application.

[0177] Example 1

[0178] like Figure 1 The diagram shown is a schematic of the optical lens structure of Example 1.

[0179] like Figure 1 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, first side surface of protective glass S12, second side surface of protective glass S13, and imaging surface IMA.

[0180] The first lens L1 has positive optical power, and its first side surface S1 and second side surface S2 are both convex. The second lens L2 has negative optical power, and its first side surface S3 and second side surface S4 are both concave. The third lens L3 has positive optical power, and its first side surface S5 and second side surface S6 are both convex. The fourth lens L4 has positive optical power, and its first side surface S8 and second side surface S9 are both convex. The fifth lens L5 has positive optical power, and its first side surface S10 and second side surface S11 are both convex. Light from the first side passes sequentially through surfaces S1 to S13 and is ultimately imaged onto the imaging plane IMA.

[0181] In this example, the total effective focal length F of the optical lens is 35.375mm, the maximum field of view (FOV) of the optical lens is 22.358°, and the total length (TTL) of the optical lens is 87.000mm.

[0182] Table 1 shows the basic structural parameters of the optical lens in Example 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0183] Surf Radius Thickness Nd Vd 1 192.450 5.002 1.85 23.79 2 -83.386 12.274 3 -19.853 5.127 1.85 23.79 4 130.290 6.717 5 -165.664 9.266 1.62 63.41 6 -23.541 -3.650 STO Infinity 4.148 8 88.502 4.797 1.62 60.34 9 -174.120 0.500 10 35.980 5.109 1.62 60.34 11 97.197 36.299 12 Infinity 1.100 1.51 62.75 13 Infinity 0.310 IMA / /

[0184] Table 1

[0185] Example 2

[0186] like Figure 2 The diagram shown is a schematic of the optical lens structure in Example 2.

[0187] like Figure 2As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, first side surface of protective glass S12, second side surface of protective glass S13, and imaging surface IMA.

[0188] The first lens L1 has positive optical power, and its first side surface S1 and second side surface S2 are both convex. The second lens L2 has negative optical power, and its first side surface S3 and second side surface S4 are both concave. The third lens L3 has positive optical power, and its first side surface S5 and second side surface S6 are both convex. The fourth lens L4 has positive optical power, and its first side surface S8 and second side surface S9 are both convex. The fifth lens L5 has positive optical power, and its first side surface S10 and second side surface S11 are both convex. Light from the first side passes sequentially through surfaces S1 to S13 and is ultimately imaged onto the imaging plane IMA.

[0189] In this example, the total effective focal length F of the optical lens is 35.369mm, the maximum field of view (FOV) of the optical lens is 22.358°, and the total length (TTL) of the optical lens is 87.000mm.

[0190] Table 2 shows the basic structural parameters of the optical lens in Example 2, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0191] Surf Radius Thickness Nd Vd 1 193.670 5.002 1.85 23.79 2 -83.386 12.274 3 -19.853 5.127 1.85 23.79 4 130.290 6.717 5 -165.664 9.266 1.62 63.41 6 -23.541 -3.650 STO Infinity 4.148 8 88.502 4.797 1.62 60.34 9 -174.120 0.500 10 35.980 5.109 1.62 60.34 11 97.197 36.299 12 Infinity 1.100 1.51 62.75 13 Infinity 0.310 IMA / /

[0192] Table 2

[0193] Example 3

[0194] like Figure 3 The diagram shown is a schematic of the optical lens structure in Example 3.

[0195] like Figure 3 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, first side surface of protective glass S12, second side surface of protective glass S13, and imaging surface IMA.

[0196] The first lens L1 has positive optical power, and its first side surface S1 and second side surface S2 are both convex. The second lens L2 has negative optical power, and its first side surface S3 and second side surface S4 are both concave. The third lens L3 has positive optical power, and its first side surface S5 and second side surface S6 are both concave. The fourth lens L4 has positive optical power, and its first side surface S8 and second side surface S9 are both convex. The fifth lens L5 has positive optical power, and its first side surface S10 and second side surface S11 are both concave. Light from the first side passes sequentially through surfaces S1 to S13 and is finally imaged onto the imaging plane IMA.

[0197] In this example, the total effective focal length F of the optical lens is 35.327mm, the maximum field of view (FOV) of the optical lens is 22.359°, and the total length (TTL) of the optical lens is 86.005mm.

[0198] Table 3 shows the basic structural parameters of the optical lens in Example 3, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0199] Surf Radius Thickness Nd Vd 1 588.130 4.944 1.85 23.79 2 -85.280 13.177 3 -19.252 5.127 1.85 23.79 4 -129.729 3.688 5 -46.711 9.446 1.62 63.41 6 -23.438 -3.648 STO Infinity 4.146 8 154.550 5.386 1.62 60.34 9 -71.430 0.500 10 37.861 5.529 1.62 60.34 11 159.050 36.299 12 Infinity 1.100 1.51 62.75 13 Infinity 0.310 IMA / /

[0200] Table 3

[0201] Example 4

[0202] like Figure 4 The diagram shown is a schematic of the optical lens structure of Example 4.

[0203] like Figure 4 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, first side surface of protective glass S12, second side surface of protective glass S13, and imaging surface IMA.

[0204] The first lens L1 has positive optical power, and its first side surface S1 and second side surface S2 are both convex. The second lens L2 has negative optical power, and its first side surface S3 and second side surface S4 are both concave. The third lens L3 has positive optical power, and its first side surface S5 and second side surface S6 are both concave. The fourth lens L4 has positive optical power, and its first side surface S8 and second side surface S9 are both convex. The fifth lens L5 has positive optical power, and its first side surface S10 and second side surface S11 are both concave. Light from the first side passes sequentially through surfaces S1 to S13 and is finally imaged onto the imaging plane IMA.

[0205] In this example, the total effective focal length F of the optical lens is 35.290mm, the maximum field of view (FOV) of the optical lens is 22.359°, and the total length (TTL) of the optical lens is 86.005mm.

[0206] Table 4 shows the basic structural parameters of the optical lens in Example 4, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0207] Surf Radius Thickness Nd Vd 1 588.130 4.944 1.85 23.79 2 -85.280 13.177 3 -19.252 5.127 1.85 23.79 4 -129.729 3.688 5 -46.711 9.446 1.62 63.41 6 -23.438 -3.648 STO Infinity 4.146 8 154.550 5.386 1.62 60.34 9 -71.430 0.500 10 37.861 5.529 1.62 60.34 11 160.010 36.299 12 Infinity 1.100 1.51 62.75 13 Infinity 0.310 IMA / /

[0208] Table 4

[0209] Example 5

[0210] like Figure 5 The diagram shown is a schematic of the optical lens structure of Example 5.

[0211] like Figure 5 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, first side surface of protective glass S12, second side surface of protective glass S13, and imaging surface IMA.

[0212] The first lens L1 has positive optical power, and its first side surface S1 and second side surface S2 are both convex. The second lens L2 has negative optical power, and its first side surface S3 and second side surface S4 are both concave. The third lens L3 has positive optical power, and its first side surface S5 and second side surface S6 are both convex. The fourth lens L4 has positive optical power, and its first side surface S8 and second side surface S9 are both convex. The fifth lens L5 has positive optical power, and its first side surface S10 and second side surface S11 are both convex. Light from the first side passes sequentially through surfaces S1 to S13 and is finally imaged onto the imaging plane IMA.

[0213] In this example, the total effective focal length F of the optical lens is 35.299mm, the maximum field of view (FOV) of the optical lens is 22.359°, and the total length (TTL) of the optical lens is 86.758mm.

[0214] Table 5 shows the basic structural parameters of the optical lens in Example 5, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0215]

[0216]

[0217] Table 5

[0218] Example 6

[0219] like Figure 6 The diagram shown is a schematic of the optical lens structure of Example 6.

[0220] like Figure 6 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, first side surface of protective glass S12, second side surface of protective glass S13, and imaging surface IMA.

[0221] The first lens L1 has positive optical power, and its first side surface S1 and second side surface S2 are both convex. The second lens L2 has negative optical power, and its first side surface S3 and second side surface S4 are both concave. The third lens L3 has positive optical power, and its first side surface S5 and second side surface S6 are both convex. The fourth lens L4 has positive optical power, and its first side surface S8 and second side surface S9 are both convex. The fifth lens L5 has positive optical power, and its first side surface S10 and second side surface S11 are both convex. Light from the first side passes sequentially through surfaces S1 to S13 and is finally imaged onto the imaging plane IMA.

[0222] In this example, the total effective focal length F of the optical lens is 35.296mm, the maximum field of view (FOV) of the optical lens is 22.359°, and the total length (TTL) of the optical lens is 86.758mm.

[0223] Table 6 shows the basic structural parameters of the optical lens in Example 6, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0224] Surf Radius Thickness Nd Vd 1 150.963 5.281 1.85 23.79 2 -150.100 14.012 3 -22.333 5.127 1.85 23.79 4 405.909 4.714 5 -98.030 9.429 1.62 63.41 6 -25.749 -2.351 STO Infinity 2.850 8 292.111 4.077 1.62 60.34 9 -93.942 0.500 10 38.931 6.303 1.62 60.34 11 -1035.780 35.405 12 Infinity 1.100 1.51 62.75 13 Infinity 0.310 IMA / /

[0225] Table 6

[0226] Example 7

[0227] like Figure 7 The diagram shown is a schematic of the optical lens structure of Example 7.

[0228] like Figure 7 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, first side surface of protective glass S12, second side surface of protective glass S13, and imaging surface IMA.

[0229] The first lens L1 has positive optical power, its first side surface S1 is concave, and its second side surface S2 is convex. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has positive optical power, its first side surface S10 is convex, and its second side surface S11 is concave. Light from the first side passes sequentially through surfaces S1 to S13 and is finally imaged onto the imaging plane IMA.

[0230] In this example, the total effective focal length F of the optical lens is 35.326mm, the maximum field of view (FOV) of the optical lens is 22.359°, and the total length (TTL) of the optical lens is 87.001mm.

[0231] Table 7 shows the basic structural parameters of the optical lens in Example 7, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0232] Surf Radius Thickness Nd Vd 1 -101.327 6.540 1.85 23.79 2 -64.570 20.894 3 -18.815 5.127 1.85 23.79 4 -42.513 1.000 5 -51.998 5.708 1.62 63.41 6 -25.525 -2.347 STO Infinity 2.842 8 185.741 4.952 1.62 60.34 9 -70.382 0.500 10 44.830 5.323 1.62 60.34 11 1941.644 35.052 12 Infinity 1.100 1.51 62.75 13 Infinity 0.310 IMA / /

[0233] Table 7

[0234] Example 8

[0235] like Figure 8 The diagram shown is a schematic of the optical lens structure of Example 8.

[0236] like Figure 8 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, first side surface of protective glass S12, second side surface of protective glass S13, and imaging surface IMA.

[0237] The first lens L1 has positive optical power, its first side surface S1 is concave, and its second side surface S2 is convex. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has positive optical power, its first side surface S10 is convex, and its second side surface S11 is concave. Light from the first side passes sequentially through surfaces S1 to S13 and is finally imaged onto the imaging plane IMA.

[0238] In this example, the total effective focal length F of the optical lens is 35.430mm, the maximum field of view (FOV) of the optical lens is 22.359°, and the total length (TTL) of the optical lens is 87.001mm.

[0239] Table 8 shows the basic structural parameters of the optical lens of Example 8, where the units for radius of curvature (Radius) and thickness (Thickness / Distance) are millimeters (mm).

[0240] Surf Radius Thickness Nd Vd 1 -101.327 6.540 1.85 23.79 2 -64.570 20.894 3 -18.815 5.127 1.85 23.79 4 -42.513 1.000 5 -51.998 5.708 1.62 63.41 6 -25.525 -2.347 STO Infinity 2.842 8 190.045 4.952 1.62 60.34 9 -70.382 0.500 10 44.830 5.323 1.62 60.34 11 1941.644 35.052 12 Infinity 1.100 1.51 62.75 13 Infinity 0.310 IMA / /

[0241] Table 8

[0242] In summary, Examples 1 through 8 satisfy the relationships shown in Table 9.

[0243]

[0244]

[0245] Table 9

[0246] Table 10 gives the total effective focal length F of the optical lenses in Examples 1 to 8, and the effective focal lengths of each lens from F1 to F5, etc. (unit: mm).

[0247]

[0248]

[0249] Table 10

[0250] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0251] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0252] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0253] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An optical lens, characterized in that, The optical lens consists of five lenses. The first side of the optical lens is the imaging side, and the second side is the image source side. The five lenses, from the first side to the second side, include the following in sequence: A first lens having positive optical power, wherein the second side surface of the first lens is a convex surface; A second lens having negative optical power, wherein the first side surface of the second lens is concave. A third lens with positive optical power, wherein the first side surface of the third lens is concave and the second side surface is convex; A fourth lens with positive optical power, wherein the first side surface of the fourth lens is convex and the second side surface is convex; A fifth lens with positive optical power, wherein the first side surface of the fifth lens is convex; The focal length F5 of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 2.507 ≥ F5 / F ≥ 1; The focal length F1 of the first lens and the total focal length F of the optical lens satisfy the following condition: 1.928 ≤ F1 / F ≤ 5.412; The radius of curvature R5 of the first side of the third lens and the total optical length of the optical lens, i.e. the distance TTL from the center of the first side of the first lens to the center of the imaging surface of the optical lens, satisfy the following condition: -1.904≤R5 / TTL≤-0.

08. The subtended angle arctan(1 / K(S6)) of the second side of the third lens satisfies: -40.338 ≥ arctan(1 / K(S6)) ≥ -65.

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

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

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

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

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

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

8. The optical lens according to claim 1, characterized in that, The optical lens also includes an aperture stop, which is disposed between the third lens and the fourth lens.

9. The optical lens according to any one of claims 1 to 8, characterized in that, The total focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 2.576 ≥ F / H ≥ 1.

2.

10. The optical lens according to any one of claims 1 to 8, characterized in that, The sag7 of the first side of the fourth lens and the sag8 of the second side of the fourth lens satisfy the following condition: 1.981 ≥ |sag7 / sag8| ≥ 0.

1.

11. The optical lens according to any one of claims 1 to 8, characterized in that, The center thickness d1 of the first lens and the optical back focal length of the optical lens, i.e., the center distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfy the following condition: 5.545≥(d1*BFL) / (d1+BFL)≥2.

12. The optical lens according to any one of claims 1 to 8, characterized in that, The radius of curvature R10 of the second side of the fifth lens and the total optical length of the optical lens, i.e. the distance TTL from the center of the first side of the first lens to the center of the imaging surface of the optical lens, satisfy the following condition: 22.318≥R10 / TTL≥-20.

13. The optical lens according to any one of claims 1 to 8, characterized in that, The radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy the following condition: 0.055≤|R3 / R4|≤1.

5.

14. The optical lens according to any one of claims 1 to 8, characterized in that, The total focal length F of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: 0.112≤|(HF*θ) / (F*θ)|≤0.

117.

15. The optical lens according to any one of claims 1 to 8, characterized in that, The optical back focal length of the optical lens, i.e., the center distance BFL from the second side center of the last lens of the optical lens to the center of the imaging plane, satisfies the following condition with respect to the total optical length of the optical lens, i.e., the center distance TTL from the first side center of the first lens to the center of the imaging plane of the optical lens: 0.438 ≥ BFL / TTL ≥ 0.

3.

16. The optical lens according to any one of claims 1 to 8, characterized in that, The second side sag6 of the third lens and the air gap d6 between the third lens and the aperture stop satisfy the following condition: 1.121≤arctan(sag6 / d6)≤3.

5.

17. The optical lens according to any one of claims 1 to 8, characterized in that, The total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: 1.300≤F / ENPD≤1.

6.

18. The optical lens according to any one of claims 1 to 8, characterized in that, The optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the following condition with respect to the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens to the center of the second side of the last lens of the optical lens: 0.781≥BFL / TL≥0.

4.

19. The optical lens according to any one of claims 1 to 8, characterized in that, The effective aperture diameter DST of the aperture and the total focal length F of the optical lens satisfy the following condition: 0.923≤DST / F≤2.

1.

20. The optical lens according to any one of claims 1 to 8, characterized in that, The maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following condition: 57.602 ≥ (FOV × F) / H ≥ 50.

21. The optical lens according to any one of claims 1 to 8, characterized in that, The image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: 1.101≤(H / 2) / (F*tan(θ / 2))≤2.

1.

22. The optical lens according to any one of claims 1 to 8, characterized in that, The radius of curvature R4 of the second side surface of the second lens and the radius of curvature R10 of the second side surface of the fifth lens satisfy the following condition: -0.9≤R4 / R10≤1.

340.

23. The optical lens according to any one of claims 1 to 8, characterized in that, The radius of curvature R6 of the second side surface of the third lens and the radius of curvature R7 of the first side surface of the fourth lens satisfy the following condition: -1.193≥(R6-R7) / (R6+R7)≥-3.

24. The optical lens according to any one of claims 1 to 8, characterized in that, The sagitta of the first side of the fourth lens, sag7, the sagitta of the second side of the fourth lens, sag8, the center thickness d7 of the fourth lens, and the air gap d8 between the fourth lens and the fifth lens satisfy the following: -0.446≥(sag7 / d7) / (sag8 / d8)≥-3.

7.

25. The optical lens according to any one of claims 1 to 8, characterized in that, The radius of curvature R4 of the second side of the second lens satisfies the following relationship with the total focal length F of the optical lens: 11.500≥|R4 / F|≥0.

5.

26. The optical lens according to any one of claims 1 to 8, characterized in that, The radius of curvature R10 of the second side of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 54.964 ≥ |R10 / F| ≥ 1.

3.

27. The optical lens according to any one of claims 1 to 8, characterized in that, The optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the following condition with respect to the focal length F2 of the second lens: -1.913≤BFL / F2≤-0.

01.

28. An electronic device, characterized in that, It includes an optical lens according to any one of claims 1 to 27 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images