Optical lens and electronic device

Abstract

The application provides an optical lens and an electronic device. The optical lens comprises, in sequence from a first side to a second side: a first lens with optical power, the first side of the first lens being concave and the second side being convex; a second lens with negative optical power, the first side of the second lens being concave and the second side being concave; a third lens with positive optical power, the second side of the third lens being convex; a fourth lens with positive optical power, the first side of the fourth lens being convex; and a fifth lens with positive optical power, the first side of the fifth lens being convex and the second side being concave. The application solves the problem that the optical lens in the prior art is difficult to simultaneously consider small CRA, high MTF and long back focal length.

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, and optical lenses have become key components for detecting information around the vehicle. In autonomous driving assistance systems, LiDAR lenses play a crucial role. LiDAR lenses are key components for acquiring external information in autonomous driving assistance systems. With the rapid development of autonomous driving assistance systems, LiDAR lenses with wavelengths above 1300nm, due to their higher emission energy while maintaining eye safety, can achieve a wider detection range and represent the main development direction for LiDAR. To meet the requirements of safe driving and due to specific installation positions, compared to ordinary optical lenses, LiDAR lenses with wavelengths above 1300nm are often matched with fiber optic light sources.

[0003] In existing technologies, optical lenses are mostly coupled to chip light sources, and generally have a large CRA (Chip Radius). Moreover, existing optical lenses generally have a short back focal length, and the space at the rear end is limited, which is not convenient for fiber optic cable arrangement.

[0004] In other words, existing optical lenses suffer from the problem of not being able to simultaneously achieve small CRA, high MTF, and long back focal length. 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 small CRA, high MTF, and long back focal length.

[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: a first lens having optical power, wherein a first side surface of the first lens is concave and a second side surface is convex; a second lens having negative optical power, wherein a first side surface of the second lens is concave and a second side surface is concave; a third lens having positive optical power, wherein a second side surface of the third lens is convex; a fourth lens having positive optical power, wherein a first side surface of the fourth lens is convex; and a fifth lens having positive optical power, wherein a first side surface of the fifth lens is convex and a second side surface is concave.

[0007] Furthermore, the first lens has positive optical power.

[0008] Furthermore, the first lens has negative optical power.

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

[0010] Furthermore, the first side surface of the third lens is convex.

[0011] Furthermore, the second side surface of the fourth lens is convex.

[0012] Furthermore, the second side surface of the fourth lens is concave.

[0013] Furthermore, the first lens and the second lens are cemented together to form a cemented doublet lens.

[0014] Furthermore, the optical lens also includes an aperture stop, which is located on the first side of the first lens.

[0015] 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 of the optical lens to the center of the second side of the last lens of the optical lens, satisfy the following condition: BFL / TL≥0.3.

[0016] 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: BFL / TTL≥0.3.

[0017] Furthermore, the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following condition: D1 / H / FOV≤0.1.

[0018] Furthermore, the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: D1 / H / θ≤5.

[0019] Furthermore, the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: D1 / H / F≤0.2.

[0020] Furthermore, the total focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: F*θ / D1≥0.3.

[0021] 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≤65.

[0022] Furthermore, the half-aperture diameter D10 of the second side of the fifth lens, 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 image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: D10*BFL / H≥55.

[0023] Furthermore, the second side half-aperture D10 of the fifth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: D10 / H≥2.5.

[0024] Furthermore, the radius of curvature R1 of the first side surface of the first lens and the maximum aperture D1 of the first side surface of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: R1 / D1≤-0.4.

[0025] 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: 0.1≤F / H≤3.

[0026] Furthermore, the focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: F2 / F≤-0.1.

[0027] Furthermore, the focal length F3 of the third lens satisfies the following relationship with the total focal length F of the optical lens: F3 / F≥0.1.

[0028] Furthermore, the focal length F4 of the fourth lens satisfies the following relationship with the total focal length F of the optical lens: F4 / F≥0.1.

[0029] Furthermore, the focal length F3 of the third lens, the radius of curvature R6 of the second side of the third lens, the focal length F4 of the fourth lens, and the radius of curvature R7 of the first side of the fourth lens satisfy the following relationship: -1≤F3 / R6+F4 / R7≤1.

[0030] Furthermore, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the following condition: 0.2 ≤ F3 / F4 ≤ 1.5.

[0031] Furthermore, the focal length F3 of the third lens and the focal length F5 of the fifth lens satisfy the following condition: 0.2≤F3 / F5≤1.5.

[0032] Furthermore, the focal length F4 of the fourth lens and the focal length F5 of the fifth lens satisfy the following condition: 0.2≤F4 / F5≤1.8.

[0033] Furthermore, the distance D between the aperture stop and the first side surface of the first lens S The length of the lens group of the optical lens, that is, the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, satisfies: D S / TL≥0.001.

[0034] Furthermore, the radius of curvature R2 of the second side surface of the first lens and the radius of curvature R3 of the first side surface of the second lens satisfy the following condition: 0.4≤R2 / R3≤1.5.

[0035] 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≤-0.001.

[0036] 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 condition: |R6| / |R7|≤1.5.

[0037] According to another aspect of the present invention, an optical lens is provided, comprising, from a first side to a second side, the following in sequence: a first lens having 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 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≤-0.001.

[0038] Furthermore, the first lens has positive optical power, and the first side surface of the first lens is concave and the second side surface is convex.

[0039] Furthermore, the first lens has negative optical power, and 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 of the third lens is concave, and the second side is convex.

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

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

[0046] Furthermore, the first lens and the second lens are cemented together to form a cemented doublet lens.

[0047] Furthermore, the optical lens also includes an aperture stop, which is located on the first side of the first lens.

[0048] 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 of the optical lens to the center of the second side of the last lens of the optical lens, satisfy the following condition: BFL / TL≥0.3.

[0049] 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: BFL / TTL≥0.3.

[0050] Furthermore, the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following condition: D1 / H / FOV≤0.1.

[0051] Furthermore, the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: D1 / H / θ≤5.

[0052] Furthermore, the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: D1 / H / F≤0.2.

[0053] Furthermore, the total focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: F*θ / D1≥0.3.

[0054] 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≤65.

[0055] Furthermore, the half-aperture diameter D10 of the second side of the fifth lens, 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 image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: D10*BFL / H≥55.

[0056] Furthermore, the second side half-aperture D10 of the fifth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: D10 / H≥2.5.

[0057] Furthermore, the radius of curvature R1 of the first side surface of the first lens and the maximum aperture D1 of the first side surface of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: R1 / D1≤-0.4.

[0058] 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: 0.1≤F / H≤3.

[0059] Furthermore, the focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: F2 / F≤-0.1.

[0060] Furthermore, the focal length F3 of the third lens satisfies the following relationship with the total focal length F of the optical lens: F3 / F≥0.1.

[0061] Furthermore, the focal length F4 of the fourth lens satisfies the following relationship with the total focal length F of the optical lens: F4 / F≥0.1.

[0062] Furthermore, the focal length F3 of the third lens, the radius of curvature R6 of the second side of the third lens, the focal length F4 of the fourth lens, and the radius of curvature R7 of the first side of the fourth lens satisfy the following relationship: -1≤F3 / R6+F4 / R7≤1.

[0063] Furthermore, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the following condition: 0.2 ≤ F3 / F4 ≤ 1.5.

[0064] Furthermore, the focal length F3 of the third lens and the focal length F5 of the fifth lens satisfy the following condition: 0.2≤F3 / F5≤1.5.

[0065] Furthermore, the focal length F4 of the fourth lens and the focal length F5 of the fifth lens satisfy the following condition: 0.2≤F4 / F5≤1.8.

[0066] Furthermore, the distance D between the aperture stop and the first side surface of the first lens S The length of the lens group of the optical lens, that is, the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, satisfies: D S / TL≥0.001.

[0067] Furthermore, the radius of curvature R2 of the second side surface of the first lens and the radius of curvature R3 of the first side surface of the second lens satisfy the following condition: 0.4≤R2 / R3≤1.5.

[0068] 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 condition: |R6| / |R7|≤1.5.

[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 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 first side of the first lens is concave and the second side is convex; the first side of the second lens is concave and the second side is concave; the second side of the third lens is convex; the first side of the fourth lens is convex; and the first side of the fifth lens is convex and the second side is concave.

[0071] The first lens can have either positive or negative optical power. Its first side is concave, and its second side is convex. When the first lens has positive optical power and its first side is concave, it facilitates light diffusion. Combined with the convex second side, this allows light to smoothly transition to the rear lens, facilitating the realization of a large aperture rear lens and thus achieving a small CRA (Current Aperture Reduction). When the first lens has negative optical power and its first side is concave, it also facilitates light diffusion. Combined with the convex second side, this allows light to smoothly transition to the rear lens, facilitating the realization of a large aperture rear lens.

[0072] The second lens has negative optical power, and both its first and second sides are concave. This negative optical power, combined with its biconcave shape, facilitates the collection of light rays entering through the first lens and a smooth transition to the third lens. The light refraction is small, which is beneficial for achieving high resolution. The negative optical power also further diffuses the collected light rays, making it easier to achieve a large aperture for the rear lens, thereby enabling a small CRA (Cryptographic Resonance Amplitude).

[0073] The third lens has positive optical power. Its first side can be either concave or convex, and its second side is convex. When the first side of the third lens is concave, the positive optical power facilitates light convergence, resulting in a crescent shape. The first side has a large curvature and a gentle shape, allowing for a smooth transition in light path. The second side convexes to the second side, causing the beam to begin converging before reaching the next lens, reducing light loss in each field of view and improving relative illumination across all fields. When the first side of the third lens is convex, the positive optical power facilitates light convergence, resulting in a biconvex shape. The first side is convex with a large curvature and a gentle shape, allowing for a smooth transition in light path. The second side convexes to the second side, causing the beam to begin converging before reaching the next lens, reducing light loss in each field of view and improving relative illumination across all fields.

[0074] The fourth lens has positive optical power. Its first side is convex, while its second side can be either convex or concave. When the second side is convex, the positive optical power facilitates light convergence. Its shape is biconvex, with the first side convex towards the first side, ensuring smooth light convergence. The second side has a larger curvature and a gentler shape, allowing for a smooth light transition. The larger aperture of the second side also facilitates achieving a small CRA (Current Radiation Amplitude). Conversely, when the second side is concave, the positive optical power also facilitates light convergence. Its shape is convex-concave, with the first side convex towards the first side, ensuring smooth light convergence. The second side is concave, with a larger curvature and a gentler shape, allowing for a smooth light transition. The larger aperture of the second side also facilitates achieving a small CRA.

[0075] The fifth lens has positive optical power. The first side of the fifth lens is convex, and the second side is concave. Positive optical power is beneficial for converging light rays. Its shape is crescent-shaped. The first side is convex to the first side, which makes the light rays converge smoothly. The second side has a larger curvature and a gentler shape, which makes the light rays transition smoothly. The second side has a larger aperture, which facilitates the realization of small CRA.

[0076] This application employs five lenses. By optimizing the optical power and surface shape of each lens, the optical lens of this invention possesses at least one beneficial effect, such as small CRA (Cost Amount Reduction), high MTF (Medium-to-Frequency), long back focal length, small front aperture, and large rear aperture. The small CRA and high MTF facilitate efficient coupling between the optical lens and the optical fiber. 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 2A 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] Figure 9 A schematic diagram of the structure of the optical lens of Example 9 of the present invention is shown;

[0087] Figure 10 A schematic diagram of the structure of the optical lens of Example 10 of the present invention is shown. 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 small CRA, high MTF, and long back focal length, this invention provides an optical lens and an electronic device.

[0098] Example 1

[0099] like Figures 1 to 10As shown, the optical lens includes, from the first side to the second side, a first lens with 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 first side of the first lens is concave and the second side is convex; the first side of the second lens is concave and the second side is concave; the second side of the third lens is convex; the first side of the fourth lens is convex; and the first side of the fifth lens is convex and the second side is concave.

[0100] The first lens can have either positive or negative optical power. Its first side is concave, and its second side is convex. When the first lens has positive optical power and its first side is concave, it facilitates light diffusion. Combined with the convex second side, this allows light to smoothly transition to the rear lens, facilitating the realization of a large aperture rear lens and thus achieving a small CRA (Current Aperture Reduction). When the first lens has negative optical power and its first side is concave, it also facilitates light diffusion. Combined with the convex second side, this allows light to smoothly transition to the rear lens, facilitating the realization of a large aperture rear lens.

[0101] The second lens has negative optical power, and both its first and second sides are concave. This negative optical power, combined with its biconcave shape, facilitates the collection of light rays entering through the first lens and a smooth transition to the third lens. The light refraction is small, which is beneficial for achieving high resolution. The negative optical power also further diffuses the collected light rays, making it easier to achieve a large aperture for the rear lens, thereby enabling a small CRA (Cryptographic Resonance Amplitude).

[0102] The third lens has positive optical power. Its first side can be either concave or convex, and its second side is convex. When the first side of the third lens is concave, the positive optical power facilitates light convergence, resulting in a crescent shape. The first side has a large curvature and a gentle shape, allowing for a smooth transition in light path. The second side convexes to the second side, causing the beam to begin converging before reaching the next lens, reducing light loss in each field of view and improving relative illumination across all fields. When the first side of the third lens is convex, the positive optical power facilitates light convergence, resulting in a biconvex shape. The first side is convex with a large curvature and a gentle shape, allowing for a smooth transition in light path. The second side convexes to the second side, causing the beam to begin converging before reaching the next lens, reducing light loss in each field of view and improving relative illumination across all fields.

[0103] The fourth lens has positive optical power. Its first side is convex, while its second side can be either convex or concave. When the second side is convex, the positive optical power facilitates light convergence. Its shape is biconvex, with the first side convex towards the first side, ensuring smooth light convergence. The second side has a larger curvature and a gentler shape, allowing for a smooth light transition. The larger aperture of the second side also facilitates achieving a small CRA (Current Radiation Amplitude). Conversely, when the second side is concave, the positive optical power also facilitates light convergence. Its shape is convex-concave, with the first side convex towards the first side, ensuring smooth light convergence. The second side is concave, with a larger curvature and a gentler shape, allowing for a smooth light transition. The larger aperture of the second side also facilitates achieving a small CRA.

[0104] The fifth lens has positive optical power. The first side of the fifth lens is convex, and the second side is concave. Positive optical power is beneficial for converging light rays. Its shape is crescent-shaped. The first side is convex to the first side, which makes the light rays converge smoothly. The second side has a larger curvature and a gentler shape, which makes the light rays transition smoothly. The second side has a larger aperture, which facilitates the realization of small CRA.

[0105] This application employs five lenses. By optimizing the optical power and surface shape of each lens, the optical lens of this invention possesses at least one beneficial effect, such as small CRA (Cost Amount Reduction), high MTF (Medium-to-Frequency), long back focal length, small front aperture, and large rear aperture. The small CRA and high MTF facilitate efficient coupling between the optical lens and the optical fiber.

[0106] In this embodiment, the first lens has positive optical power. Positive optical power and a concave first side surface facilitate light diffusion. Combined with a convex second side surface, this allows light to smoothly transition to the rear lens, facilitating the realization of a large aperture rear lens and thus achieving a small CRA (Current Aperture Reduction).

[0107] In this embodiment, the first lens has negative optical power. The negative optical power and the concave first side surface facilitate light diffusion, while the convex second side surface allows light to smoothly transition to the rear lens, facilitating the realization of a large aperture rear lens.

[0108] In this embodiment, the first side of the third lens is concave. Positive optical power is beneficial for converging light rays, and its shape is crescent-shaped. The curvature of the first side is relatively large, and its shape is gentle, so that the light path transitions smoothly. The second side is convex to the second side, so that the light beam begins to converge and is transmitted to the next lens, reducing the loss of light rays in each field of view and improving the relative illumination of each field of view.

[0109] In this embodiment, the first side surface of the third lens is convex. Positive optical power is beneficial for converging light rays. The shape is biconvex, with the first side surface being convex and having a large curvature and a gentle shape, allowing the light rays to transition smoothly. The second side surface convexes to the second side, causing the light beam to begin to converge and be transmitted to the next lens, reducing the loss of light rays in each field of view and improving the relative illumination of each field of view.

[0110] In this embodiment, the second side of the fourth lens is convex. Positive optical power is beneficial for converging light rays. The shape is biconvex, with the first side convex towards the first side to ensure smooth convergence of light rays. The second side has a larger curvature and a gentler shape to ensure smooth transition of light rays. The second side also has a larger aperture, which facilitates the implementation of a small CRA (Current Radiation Amplifier).

[0111] In this embodiment, the second side of the fourth lens is concave. Positive optical power is beneficial for converging light, and the shape is convex and concave. The first side is convex to the first side, so that the light converges smoothly. The second side is concave with a large curvature and a gentle shape, so that the light transitions smoothly. The second side has a large aperture, which facilitates the realization of small CRA.

[0112] In an optional embodiment, the first lens and the second lens are cemented together to form a cemented doublet lens. This allows for a smooth transition of light to the rear optical system, reducing the overall length of the optical lens. The second side surface of the first lens and the first side surface of the second lens are concave and convex in the same direction, allowing the first lens to be cemented with the second lens head, which helps reduce assembly tolerances and decrease sensitivity. Simultaneously, it allows for sufficient correction of various aberrations in the optical system, improving resolution and optimizing optical performance such as distortion and CRA while maintaining a compact structure. Using a cemented doublet lens also reduces the air gap between the two lenses, decreasing the overall system length; the chromatic aberration of the two lenses is complementary, which helps reduce chromatic aberration and improve image quality; it reduces the number of assembly components between the two lenses, reducing processes and costs; furthermore, it can reduce field curvature and correct off-axis point aberrations of the system. It also facilitates the rational allocation of focal length, helps achieve thermal compensation, and obtains good temperature performance.

[0113] In this embodiment, the optical lens further includes an aperture stop, which is disposed on the first side of the first lens.

[0114] 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 ≥ 0.3 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 ≥ 0.4.

[0115] 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, which is the optical total length of the optical lens (TTL), i.e., the distance from the center of the first side of the first lens of the optical lens to the center of the imaging plane. Controlling this condition facilitates achieving the desired back focal length, provides space for optical element installation and focusing, and avoids mechanical interference. Preferably, BFL / TTL ≥ 0.34.

[0116] In this embodiment, the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view (FOV) of the optical lens satisfy the following condition: D1 / H / FOV ≤ 0.1. Satisfying this condition ensures a small front aperture, which is beneficial for miniaturization. Preferably, D1 / H / FOV ≤ 0.08. The maximum field of view (FOV) is related to the image height H, and refers to the field of view corresponding to that image height.

[0117] In this embodiment, the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the condition: D1 / H / θ≤5. Satisfying this condition ensures a small front aperture, which is beneficial for miniaturization. Preferably, D1 / H / θ≤4.5.

[0118] In this embodiment, the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the condition: D1 / H / F≤0.2. By controlling this condition, under the condition of fixed focal length, the optical lens can be provided with the characteristics of a large target surface and a small aperture. Preferably, D1 / H / F≤0.15.

[0119] In this embodiment, the overall focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the condition: F*θ / D1≥0.3. Satisfying this condition allows for a smaller front aperture of the optical lens, reducing the volume of the imaging system. Preferably, F*θ / D1≥0.4.

[0120] 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 satisfy the condition: (FOV*F) / H ≤ 65. Satisfying this condition allows for a smaller field of view under the same image height and focal length, which is beneficial for achieving low distortion. Preferably, (FOV*F) / H ≤ 62. The maximum field of view (FOV) is related to the image height (H) and represents the field of view corresponding to that image height.

[0121] In this embodiment, the half-aperture diameter D10 of the second side of the fifth lens, 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 image height H corresponding to the maximum field of view of the optical lens satisfy the condition: D10*BFL / H≥55. Satisfying this condition ensures a long back focal length and smoother light propagation under the same imaging plane and image height, which is beneficial for achieving a small CRA (Cost Reduction Aspect Ratio). Preferably, D10*BFL / H≥60.

[0122] In this embodiment, the half-aperture diameter D10 of the second side of the fifth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the condition: D10 / H ≥ 2.5. Satisfying this condition, under the same imaging plane and image height, results in a larger effective aperture for the last lens, which is beneficial for the principal rays from the edge field of view to exit parallel onto the imaging plane, thus facilitating the achievement of a small CRA (Current Field Reflection). Preferably, D10 / H ≥ 3.

[0123] In this embodiment, the radius of curvature R1 of the first side surface of the first lens and the maximum aperture D1 of the first side surface of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: R1 / D1 ≤ -0.4. Controlling the first side surface of the first lens to be concave is beneficial for smoothing the light path and improving image quality. Preferably, R1 / D1 ≤ -0.6.

[0124] 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: 0.1 ≤ F / H ≤ 3. Satisfying this condition ensures that the focal length and image height are controlled within a certain range, guaranteeing the coordination between the field of view and image height, which is beneficial for improving resolution. Preferably, 1 ≤ F / H ≤ 2.5.

[0125] In this embodiment, the focal length F2 of the second lens satisfies the condition F2 / F ≤ -0.1 with the overall focal length F of the optical lens. Properly allocating the focal length of the second lens facilitates the smooth entry of edge field-of-view light into the optical system. By setting the optical power of the second lens to negative, a negative focal length is beneficial for the smooth transition of peripheral light entering through the first lens, reducing sensitivity and improving image quality. Preferably, -1.8 ≤ F2 / F ≤ -0.5.

[0126] In this embodiment, the focal length F3 of the third lens satisfies the condition F3 / F ≥ 0.1 with the overall focal length F of the optical lens. Properly allocating the focal length of the third lens facilitates the smooth entry of edge field-of-view light into the optical system. By setting the optical power of the third lens to positive and the focal length to positive, peripheral light entering through the second lens converges quickly after exiting the fourth lens, improving image quality. Preferably, 1 ≤ F3 / F ≤ 3.

[0127] In this embodiment, the focal length F4 of the fourth lens satisfies the condition F4 / F≥0.1 with the overall focal length F of the optical lens. Properly allocating the focal length of the fourth lens facilitates the smooth entry of edge field-of-view rays into the optical system. By setting the optical power of the fourth lens to positive and the focal length to positive, peripheral light rays entering through the third lens converge quickly after exiting the fifth lens, improving image quality. Preferably, 1≤F4 / F≤4.5.

[0128] In this embodiment, the focal length F3 of the third lens, the radius of curvature R6 of the second side surface of the third lens, the focal length F4 of the fourth lens, and the radius of curvature R7 of the first side surface of the fourth lens satisfy the condition: -1 ≤ F3 / R6 + F4 / R7 ≤ 1. 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, -0.8 ≤ F3 / R6 + F4 / R7 ≤ 0.5.

[0129] In this embodiment, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the condition: 0.2 ≤ F3 / F4 ≤ 1.5. Satisfying this condition ensures that the focal lengths of adjacent lenses are similar, which helps to smooth the light transition and improves image quality. Preferably, 0.5 ≤ F3 / F4 ≤ 1.3.

[0130] In this embodiment, the focal length F3 of the third lens and the focal length F5 of the fifth lens satisfy the condition: 0.2 ≤ F3 / F5 ≤ 1.5. Satisfying this condition ensures that the focal lengths of adjacent lenses are similar, which helps to smooth the light transition and improves image quality. Preferably, 0.4 ≤ F3 / F5 ≤ 1.2.

[0131] In this embodiment, the focal length F4 of the fourth lens and the focal length F5 of the fifth lens satisfy the condition: 0.2 ≤ F4 / F5 ≤ 1.8. Satisfying this condition ensures that the focal lengths of adjacent lenses are similar, which helps to smooth the light transition and improves image quality. Preferably, 0.45 ≤ F4 / F5 ≤ 1.5.

[0132] In this embodiment, the distance D between the aperture stop and the first side surface of the first lens is... S The length of the lens group of the optical lens, that is, the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, satisfies: D S / TL≥0.001. Meeting this condition ensures the aperture stop is located in front of the optical lens, which facilitates achieving an infinitely far exit pupil and thus a small CRA; furthermore, the front end can provide space for the steering mechanism, while also meeting the requirement of miniaturization of the lens barrel. Preferably, 0.01≤D S / TL≤0.5. More preferably, 0.05≤D S / TL≤0.2.

[0133] In this embodiment, the radius of curvature R2 of the second side surface of the first lens and the radius of curvature R3 of the first side surface of the second lens satisfy the condition: 0.4 ≤ R2 / R3 ≤ 1.5. Satisfying this condition ensures that the radius of curvature of the second side surface of the first lens is close to that of the first side surface of the second lens, which helps to smooth the light transition and improves image quality. Preferably, 0.6 ≤ R2 / R3 ≤ 1.2.

[0134] 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 ≤ -0.001. Setting the shape of the second lens to be biconcave is beneficial for collecting light rays entering through the first lens and smoothly transitioning them to the third lens, resulting in minimal light deflection and facilitating high resolution. Preferably, R3 / R4 ≤ -0.05.

[0135] 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|≤1.5. Since the radius of curvature |R6| of the second side surface of the third lens is smaller than or close to the radius of curvature |R7| of the first side surface of the fourth lens, light rays are refracted from the third lens towards the imaging plane. Combined with the aperture stop being located at the front of the optical lens, this facilitates the implementation of a small CRA (Curvature Radiation Amplitude Reflection). Preferably, |R6| / |R7|≤1.2.

[0136] Example 2

[0137] like Figures 1 to 10 As shown, the optical lens, from the first side to the second side, sequentially includes: a first lens with 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 radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy: R3 / R4≤-0.001. The second lens is designed to be biconcave, which facilitates the collection of light rays entering through the first lens and a smooth transition to the third lens, resulting in minimal light refraction and promoting high resolution. Preferably, R3 / R4≤-0.05.

[0138] In this embodiment, the first lens has positive optical power, a first concave side surface, and a second convex side surface. Positive optical power and a concave first side surface facilitate light diffusion, while the convex second side surface allows for a smooth transition of light to the rear lens, enabling the realization of a large aperture rear lens and thus achieving a small CRA (Current Aperture Reduction).

[0139] In this embodiment, the first lens has negative optical power, a concave first side surface, and a convex second side surface. The negative optical power and the concave first side surface facilitate light diffusion, while the convex second side surface ensures a smooth transition of light to the rear lens, enabling the realization of a large aperture rear lens.

[0140] In this embodiment, the first side surface of the second lens is concave, and the second side surface is concave. The negative optical power combined with the double concave shape is beneficial for collecting the light entering through the first lens and smoothly transitioning to the third lens. The light deflection is small, which is conducive to achieving high resolution. The negative optical power further diffuses the collected light, which is convenient for achieving a large aperture of the rear lens, thereby achieving a small CRA.

[0141] In this embodiment, the first side of the third lens is concave, and the second side is convex. Positive optical power facilitates light convergence, and the shape is crescent-shaped. The first side has a large curvature and a gentle shape, allowing for a smooth transition of light path. The second side convexes towards the second side, causing the light beam to begin converging and being transmitted to the next lens, reducing light loss in each field of view and improving the relative illumination of each field of view.

[0142] In this embodiment, the first side surface of the third lens is convex, and the second side surface is also convex. Positive optical power is beneficial for converging light rays. The shape is biconvex, with the first side surface being convex and having a large curvature and a gentle shape, allowing the light rays to transition smoothly. The second side surface convexes to the second side, causing the light beam to begin converging and be transmitted to the next lens, reducing the loss of light rays in each field of view and improving the relative illumination of each field of view.

[0143] In this embodiment, the first side surface of the fourth lens is convex, and the second side surface is also convex. Positive optical power facilitates light convergence, and the lens has a biconvex shape. The first side surface convexes towards the first side, allowing light to converge smoothly. The second side surface has a larger curvature and a gentler shape, ensuring a smooth transition of light. The second side surface also has a larger aperture, facilitating the implementation of a small CRA (Current Radiation Amplifier).

[0144] In this embodiment, the first side of the fourth lens is convex, and the second side is concave. Positive optical power is beneficial for converging light, and the shape is convex and concave. The first side is convex to the first side, so that the light converges smoothly. The second side is concave with a large curvature and a gentle shape, so that the light transitions smoothly. The second side has a large aperture, which facilitates the realization of small CRA.

[0145] In this embodiment, the first side of the fifth lens is convex, and the second side is concave. Positive optical power facilitates light convergence, and its crescent shape allows for smooth light convergence. The first side convexes towards the first side, ensuring stable light convergence. The second side has a larger curvature and a gentler shape, allowing for a smooth transition of light path. The larger aperture of the second side facilitates the implementation of a small CRA (Current Amplitude Reflection).

[0146] This application employs five lenses. By optimizing the optical power and surface shape of each lens, the optical lens of this invention possesses at least one beneficial effect, such as small CRA (Cost Amount Reduction), high MTF (Medium-to-Frequency), long back focal length, small front aperture, and large rear aperture. The small CRA and high MTF facilitate efficient coupling between the optical lens and the optical fiber.

[0147] In an optional embodiment, the first lens and the second lens are cemented together to form a cemented doublet lens. This allows for a smooth transition of light to the rear optical system, reducing the overall length of the optical lens. The second side surface of the first lens and the first side surface of the second lens are concave and convex in the same direction, allowing the first lens to be cemented with the second lens head, which helps reduce assembly tolerances and decrease sensitivity. Simultaneously, it allows for sufficient correction of various aberrations in the optical system, improving resolution and optimizing optical performance such as distortion and CRA while maintaining a compact structure. Using a cemented doublet lens also reduces the air gap between the two lenses, decreasing the overall system length; the chromatic aberration of the two lenses is complementary, which helps reduce chromatic aberration and improve image quality; it reduces the number of assembly components between the two lenses, reducing processes and costs; furthermore, it can reduce field curvature and correct off-axis point aberrations of the system. It also facilitates the rational allocation of focal length, helps achieve thermal compensation, and obtains good temperature performance.

[0148] In this embodiment, the optical lens further includes an aperture stop, which is disposed on the first side of the first lens.

[0149] 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 ≥ 0.3 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 ≥ 0.4.

[0150] 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, which is the optical total length of the optical lens (TTL), i.e., the distance from the center of the first side of the first lens of the optical lens to the center of the imaging plane. Controlling this condition facilitates achieving the desired back focal length, provides space for optical element installation and focusing, and avoids mechanical interference. Preferably, BFL / TTL ≥ 0.34.

[0151] In this embodiment, the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view (FOV) of the optical lens satisfy the following condition: D1 / H / FOV ≤ 0.1. Satisfying this condition ensures a small front aperture, which is beneficial for miniaturization. Preferably, D1 / H / FOV ≤ 0.08. The maximum field of view (FOV) is related to the image height H, and refers to the field of view corresponding to that image height.

[0152] In this embodiment, the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the condition: D1 / H / θ≤5. Satisfying this condition ensures a small front aperture, which is beneficial for miniaturization. Preferably, D1 / H / θ≤4.5.

[0153] In this embodiment, the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the condition: D1 / H / F≤0.2. By controlling this condition, under the condition of fixed focal length, the optical lens can be provided with the characteristics of a large target surface and a small aperture. Preferably, D1 / H / F≤0.15.

[0154] In this embodiment, the overall focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the condition: F*θ / D1≥0.3. Satisfying this condition allows for a smaller front aperture of the optical lens, reducing the volume of the imaging system. Preferably, F*θ / D1≥0.4.

[0155] 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 satisfy the condition: (FOV*F) / H ≤ 65. Satisfying this condition allows for a smaller field of view under the same image height and focal length, which is beneficial for achieving low distortion. Preferably, (FOV*F) / H ≤ 62. The maximum field of view (FOV) is related to the image height (H) and represents the field of view corresponding to that image height.

[0156] In this embodiment, the half-aperture diameter D10 of the second side of the fifth lens, 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 image height H corresponding to the maximum field of view of the optical lens satisfy the condition: D10*BFL / H≥55. Satisfying this condition ensures a long back focal length and smoother light propagation under the same imaging plane and image height, which is beneficial for achieving a small CRA (Cost Reduction Aspect Ratio). Preferably, D10*BFL / H≥60.

[0157] In this embodiment, the half-aperture diameter D10 of the second side of the fifth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the condition: D10 / H ≥ 2.5. Satisfying this condition, under the same imaging plane and image height, results in a larger effective aperture for the last lens, which is beneficial for the principal rays from the edge field of view to exit parallel onto the imaging plane, thus facilitating the achievement of a small CRA (Current Field Reflection). Preferably, D10 / H ≥ 3.

[0158] In this embodiment, the radius of curvature R1 of the first side surface of the first lens and the maximum aperture D1 of the first side surface of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: R1 / D1 ≤ -0.4. Controlling the first side surface of the first lens to be concave is beneficial for smoothing the light path and improving image quality. Preferably, R1 / D1 ≤ -0.6.

[0159] 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: 0.1 ≤ F / H ≤ 3. Satisfying this condition ensures that the focal length and image height are controlled within a certain range, guaranteeing the coordination between the field of view and image height, which is beneficial for improving resolution. Preferably, 1 ≤ F / H ≤ 2.5.

[0160] In this embodiment, the focal length F2 of the second lens satisfies the condition F2 / F ≤ -0.1 with the overall focal length F of the optical lens. Properly allocating the focal length of the second lens facilitates the smooth entry of edge field-of-view light into the optical system. By setting the optical power of the second lens to negative, a negative focal length is beneficial for the smooth transition of peripheral light entering through the first lens, reducing sensitivity and improving image quality. Preferably, -1.8 ≤ F2 / F ≤ -0.5.

[0161] In this embodiment, the focal length F3 of the third lens satisfies the condition F3 / F ≥ 0.1 with the overall focal length F of the optical lens. Properly allocating the focal length of the third lens facilitates the smooth entry of edge field-of-view light into the optical system. By setting the optical power of the third lens to positive and the focal length to positive, peripheral light entering through the second lens converges quickly after exiting the fourth lens, improving image quality. Preferably, 1 ≤ F3 / F ≤ 3.

[0162] In this embodiment, the focal length F4 of the fourth lens satisfies the condition F4 / F≥0.1 with the overall focal length F of the optical lens. Properly allocating the focal length of the fourth lens facilitates the smooth entry of edge field-of-view rays into the optical system. By setting the optical power of the fourth lens to positive and the focal length to positive, peripheral light rays entering through the third lens converge quickly after exiting the fifth lens, improving image quality. Preferably, 1≤F4 / F≤4.5.

[0163] In this embodiment, the focal length F3 of the third lens, the radius of curvature R6 of the second side surface of the third lens, the focal length F4 of the fourth lens, and the radius of curvature R7 of the first side surface of the fourth lens satisfy the condition: -1 ≤ F3 / R6 + F4 / R7 ≤ 1. 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, -0.8 ≤ F3 / R6 + F4 / R7 ≤ 0.5.

[0164] In this embodiment, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the condition: 0.2 ≤ F3 / F4 ≤ 1.5. Satisfying this condition ensures that the focal lengths of adjacent lenses are similar, which helps to smooth the light transition and improves image quality. Preferably, 0.5 ≤ F3 / F4 ≤ 1.3.

[0165] In this embodiment, the focal length F3 of the third lens and the focal length F5 of the fifth lens satisfy the condition: 0.2 ≤ F3 / F5 ≤ 1.5. Satisfying this condition ensures that the focal lengths of adjacent lenses are similar, which helps to smooth the light transition and improves image quality. Preferably, 0.4 ≤ F3 / F5 ≤ 1.2.

[0166] In this embodiment, the focal length F4 of the fourth lens and the focal length F5 of the fifth lens satisfy the condition: 0.2 ≤ F4 / F5 ≤ 1.8. Satisfying this condition ensures that the focal lengths of adjacent lenses are similar, which helps to smooth the light transition and improves image quality. Preferably, 0.45 ≤ F4 / F5 ≤ 1.5.

[0167] In this embodiment, the distance D between the aperture stop and the first side surface of the first lens is... S The length of the lens group of the optical lens, that is, the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, satisfies: D S / TL≥0.001. Meeting this condition ensures the aperture stop is located in front of the optical lens, which facilitates achieving an infinitely far exit pupil and thus a small CRA; furthermore, the front end can provide space for the steering mechanism, while also meeting the requirement of miniaturization of the lens barrel. Preferably, 0.01≤D S / TL≤0.5. More preferably, 0.05≤D S / TL≤0.2.

[0168] In this embodiment, the radius of curvature R2 of the second side surface of the first lens and the radius of curvature R3 of the first side surface of the second lens satisfy the condition: 0.4 ≤ R2 / R3 ≤ 1.5. Satisfying this condition ensures that the radius of curvature of the second side surface of the first lens is close to that of the first side surface of the second lens, which helps to smooth the light transition and improves image quality. Preferably, 0.6 ≤ R2 / R3 ≤ 1.2.

[0169] 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|≤1.5. Since the radius of curvature |R6| of the second side surface of the third lens is smaller than or close to the radius of curvature |R7| of the first side surface of the fourth lens, light rays are refracted from the third lens towards the imaging plane. Combined with the aperture stop being located at the front of the optical lens, this facilitates the implementation of a small CRA (Curvature Radiation Amplitude Reflection). Preferably, |R6| / |R7|≤1.2.

[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 ten 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, from the first side to the second side, includes: aperture stop STO, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, first side surface of protective glass S11, second side surface of protective glass S12, and imaging surface IMA.

[0180] The first lens L1 has negative 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 concave. 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 S7 is convex, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave.

[0181] In this example, the total effective focal length F of the optical lens is 17.191mm, the maximum field of view (FOV) of the optical lens is 27.800°, and the total length (TTL) of the optical lens is 54.992mm.

[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 STO Infinity 3.1600 1 -11.8029 6.7856 1.74 49.22 2 -14.9135 0.2800 3 -19.6024 6.4391 1.59 61.25 4 94.1634 1.7200 5 -160.2899 5.1039 1.90 31.31 6 -31.3634 0.1800 7 45.6876 5.4664 1.81 33.29 8 -116.0366 0.2100 9 23.3155 6.3285 1.81 25.46 10 44.2829 8.0000 11 Infinity 1.9000 1.46 67.82 12 Infinity 12.5785 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 2 As shown, the optical lens, from the first side to the second side, includes: aperture stop STO, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, first side surface of protective glass S11, second side surface of protective glass S12, and imaging surface IMA.

[0188] The first lens L1 has negative 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 concave. 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 S7 is convex, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave.

[0189] In this example, the total effective focal length F of the optical lens is 17.216mm, the maximum field of view (FOV) of the optical lens is 27.800°, and the total length (TTL) of the optical lens is 53.938mm.

[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 STO Infinity 3.1600 1 -11.8884 6.4604 1.74 49.22 2 -15.0051 0.2800 3 -19.5987 6.1590 1.59 61.25 4 96.9914 1.8200 5 -166.6710 5.2164 1.90 31.31 6 -31.7285 0.1800 7 46.8416 4.8192 1.81 33.29 8 -112.1255 0.2100 9 22.8887 6.3437 1.81 25.46 10 43.9908 8.0000 11 Infinity 1.9000 1.46 67.82 12 Infinity 12.5492 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 3As shown, the optical lens, from the first side to the second side, includes: aperture stop STO, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, first side surface of protective glass S11, second side surface of protective glass S12, and imaging surface IMA.

[0196] 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 concave. 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 S7 is convex, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave.

[0197] In this example, the total effective focal length F of the optical lens is 17.150mm, the maximum field of view (FOV) of the optical lens is 27.800°, and the total length (TTL) of the optical lens is 54.731mm.

[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]

[0200]

[0201] Table 3

[0202] Example 4

[0203] like Figure 4 The diagram shown is a schematic of the optical lens structure of Example 4.

[0204] like Figure 4 As shown, the optical lens, from the first side to the second side, includes: aperture stop STO, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, first side surface of protective glass S11, second side surface of protective glass S12, and imaging surface IMA.

[0205] 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 concave. 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 S7 is convex, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave.

[0206] In this example, the total effective focal length F of the optical lens is 17.220mm, the maximum field of view (FOV) of the optical lens is 27.800°, and the total length (TTL) of the optical lens is 54.270mm.

[0207] 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).

[0208] Surf Radius Thickness Nd Vd STO Infinity 3.0000 1 -12.6272 6.6039 1.74 49.22 2 -15.2088 0.2000 3 -17.2658 6.6108 1.59 61.25 4 125.9786 1.7000 5 -138.8457 4.5537 1.90 31.31 6 -30.4126 0.3000 7 51.5355 5.2373 1.81 33.29 8 -92.8839 0.2000 9 22.9203 6.7458 1.81 25.46 10 44.8394 9.4296 11 Infinity 1.9000 1.46 67.82 12 Infinity 10.7891 IMA / /

[0209] Table 4

[0210] Example 5

[0211] like Figure 5 The diagram shown is a schematic of the optical lens structure of Example 5.

[0212] like Figure 5 As shown, the optical lens, from the first side to the second side, includes: aperture stop STO, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, first side surface of protective glass S11, second side surface of protective glass S12, and imaging surface IMA.

[0213] The first lens L1 has negative 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 concave. 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 S7 is convex, and its second side surface S8 is concave. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave.

[0214] In this example, the total effective focal length F of the optical lens is 17.233mm, the maximum field of view (FOV) of the optical lens is 27.800°, and the total length (TTL) of the optical lens is 55.446mm.

[0215] 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).

[0216] Surf Radius Thickness Nd Vd STO Infinity 3.1600 1 -11.9523 6.9297 1.74 49.22 2 -15.1644 0.2670 3 -20.3009 6.6458 1.59 61.25 4 89.9870 1.5471 5 -188.5596 5.2779 1.90 31.31 6 -28.0050 0.1800 7 35.2263 6.2235 1.81 33.29 8 183.9048 0.2100 9 25.0122 6.6277 1.81 25.46 10 62.7929 8.0000 11 Infinity 1.9000 1.46 67.82 12 Infinity 11.6372 IMA / /

[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, from the first side to the second side, includes: aperture stop STO, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, first side surface of protective glass S11, second side surface of protective glass S12, and imaging surface IMA.

[0221] The first lens L1 has negative 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 concave. 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 S7 is convex, and its second side surface S8 is concave. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave.

[0222] In this example, the total effective focal length F of the optical lens is 17.183mm, the maximum field of view (FOV) of the optical lens is 27.800°, and the total length (TTL) of the optical lens is 55.385mm.

[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 STO Infinity 3.1600 1 -11.9234 6.9156 1.74 49.22 2 -15.1084 0.3793 3 -20.1003 6.6338 1.59 61.25 4 94.2336 1.5272 5 -166.0791 5.1645 1.90 31.31 6 -27.3079 0.1800 7 37.0713 6.2252 1.81 33.29 8 176.0001 0.2100 9 23.9060 6.6215 1.81 25.46 10 61.1041 8.0000 11 Infinity 1.9000 1.46 67.82 12 Infinity 11.6282 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, from the first side to the second side, includes: aperture stop STO, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, first side surface of protective glass S11, second side surface of protective glass S12, and imaging surface IMA.

[0229] The first lens L1 has negative 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 concave. The third lens L3 has positive optical power, its first side surface S5 is convex, and its second side surface S6 is convex. The fourth lens L4 has positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave.

[0230] In this example, the total effective focal length F of the optical lens is 17.119mm, the maximum field of view (FOV) of the optical lens is 27.800°, and the total length (TTL) of the optical lens is 54.717mm.

[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 STO Infinity 3.1600 1 -11.7990 6.8603 1.74 49.22 2 -15.1212 0.1131 3 -23.5771 6.3846 1.59 61.25 4 51.5910 1.5733 5 165.2826 4.5518 1.90 31.31 6 -37.1855 1.5604 7 37.0258 6.2233 1.81 33.29 8 -191.2253 1.5000 9 22.8042 6.6314 1.81 25.46 10 36.0049 8.0000 11 Infinity 1.9000 1.46 67.82 12 Infinity 9.4188 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, from the first side to the second side, includes: aperture stop STO, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, first side surface of protective glass S11, second side surface of protective glass S12, and imaging surface IMA.

[0237] The first lens L1 has negative 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 concave. The third lens L3 has positive optical power, its first side surface S5 is convex, and its second side surface S6 is convex. The fourth lens L4 has positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave.

[0238] In this example, the total effective focal length F of the optical lens is 17.187mm, the maximum field of view (FOV) of the optical lens is 27.800°, and the total length (TTL) of the optical lens is 54.657mm.

[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 STO Infinity 3.1600 1 -11.8624 6.8583 1.74 49.22 2 -15.1552 0.1280 3 -23.0508 6.6041 1.59 61.25 4 54.6127 1.5668 5 180.1214 4.5628 1.90 31.31 6 -37.2984 1.2825 7 37.3282 6.2219 1.81 33.29 8 -200.6342 1.0000 9 22.9820 6.6287 1.81 25.46 10 36.9134 8.0000 11 Infinity 1.9000 1.46 67.82 12 Infinity 9.9043 IMA / /

[0241] Table 8

[0242] Example 9

[0243] like Figure 9 The diagram shown is a schematic of the optical lens structure of Example 9.

[0244] like Figure 9 As shown, the optical lens, from the first side to the second side, includes: aperture stop STO, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, first side surface of protective glass S11, second side surface of protective glass S12, and imaging surface IMA.

[0245] 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 concave. 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 S7 is convex, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. Since the first lens L1 and the second lens L2 are cemented together to form a cemented doublet lens, the second side surface S2 of the first lens and the first side surface S3 of the second lens are the same surface.

[0246] In this example, the total effective focal length F of the optical lens is 17.195mm, the maximum field of view (FOV) of the optical lens is 27.800°, and the total length (TTL) of the optical lens is 57.511mm.

[0247] Table 9 shows the basic structural parameters of the optical lens of Example 9, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0248]

[0249]

[0250] Table 9

[0251] Example 10

[0252] like Figure 10 The diagram shown is a schematic of the optical lens structure of Example 10.

[0253] like Figure 10 As shown, the optical lens, from the first side to the second side, includes: aperture stop STO, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, first side surface of protective glass S11, second side surface of protective glass S12, and imaging surface IMA.

[0254] 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 concave. 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 S7 is convex, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. Since the first lens L1 and the second lens L2 are cemented together to form a cemented doublet lens, the second side surface S2 of the first lens and the first side surface S3 of the second lens are the same surface.

[0255] In this example, the total effective focal length F of the optical lens is 17.154mm, the maximum field of view (FOV) of the optical lens is 27.800°, and the total length (TTL) of the optical lens is 57.614mm.

[0256] Table 10 shows the basic structural parameters of the optical lens of Example 10, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0257]

[0258]

[0259] Table 10

[0260] In summary, Examples 1 through 15 satisfy the relationships shown in Table 11.

[0261] Conditional / Example 1 2 3 4 5 6 7 8 9 10 BFL / TL 0.69 0.71 0.70 0.69 0.64 0.64 0.55 0.57 0.64 0.63 BFL / TTL 0.41 0.42 0.41 0.41 0.39 0.39 0.35 0.36 0.39 0.39 D1 / H / FOV 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 D1 / H / θ 4.01 4.01 4.02 4.00 3.99 4.01 4.03 4.02 4.17 4.18 D1 / H / F 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.12 0.12 F*θ / D1 0.53 0.53 0.53 0.53 0.53 0.53 0.53 0.53 0.51 0.51 (FOV*F) / H 58.83 58.93 58.88 58.87 58.76 58.77 58.96 58.98 59.01 58.95 D10*BFL / H 73.60 73.53 71.94 70.17 69.21 70.45 63.66 65.03 72.29 72.41 D10 / H 3.27 3.28 3.19 3.17 3.21 3.27 3.30 3.28 3.23 3.24 R1 / D1 -0.75 -0.75 -0.79 -0.80 -0.76 -0.75 -0.75 -0.75 -0.80 -0.80 F / H 2.12 2.12 2.12 2.12 2.11 2.11 2.12 2.12 2.12 2.12 F2 / F -1.61 -1.62 -1.49 -1.51 -1.64 -1.64 -1.60 -1.59 -0.99 -1.01 F3 / F 2.57 2.58 2.59 2.56 2.17 2.16 2.07 2.09 2.53 2.54 F4 / F 2.50 2.51 2.50 2.52 3.20 3.46 2.37 2.39 2.71 2.80 F3 / R6 + F4 / R7 -0.47 -0.48 -0.61 -0.61 0.23 0.25 0.14 0.14 -0.45 -0.49 F3 / F4 1.03 1.03 1.04 1.01 0.68 0.62 0.87 0.88 0.93 0.91 F3 / F5 0.78 0.81 0.82 0.82 0.74 0.78 0.53 0.55 0.87 0.87 F4 / F5 0.76 0.79 0.79 0.81 1.10 1.25 0.61 0.62 0.93 0.96 <![CDATA[D S / TL]]> 0.10 0.10 0.09 0.09 0.09 0.09 0.09 0.09 0.10 0.09 R2 / R3 0.76 0.77 0.89 0.88 0.75 0.75 0.64 0.66 1.00 1.00 R3 / R4 -0.21 -0.20 -0.14 -0.14 -0.23 -0.21 -0.46 -0.42 -0.11 -0.10 |R6| / |R7| 0.69 0.68 0.61 0.59 0.80 0.74 1.00 1.00 0.63 0.59

[0262] Table 11

[0263] Table 12 gives the effective focal length F of the optical lenses for Examples 1 to 10, and the effective focal lengths of each lens from F1 to F5, etc. (unit: mm).

[0264]

[0265]

[0266] Table 12

[0267] 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.

[0268] 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.

[0269] 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.

[0270] 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 with optical power, and the five lenses with optical power are sequentially arranged from the first side to the second side as follows: A first lens having optical power, wherein the first side surface of the first lens is concave and the second side surface is convex; A second lens with negative optical power, wherein the first side surface of the second lens is concave and the second side surface is concave; A third lens having positive optical power, wherein the second side surface of the third lens is convex; A fourth lens with positive optical power, wherein the first side surface of the fourth lens is convex; A fifth lens with positive optical power, wherein the first side surface of the fifth lens is convex and the second side surface is concave; The focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: -1.8 ≤ F2 / F ≤ -0.

1.

2. The optical lens according to claim 1, characterized in that, The first lens has positive optical power.

3. The optical lens according to claim 1, characterized in that, The first lens has negative optical power.

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

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

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

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

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

9. The optical lens according to claim 1, characterized in that, The optical lens also includes an aperture stop, which is disposed on the first side of the first lens.

10. The optical lens according to any one of claims 1 to 9, 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, 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 of the optical lens to the center of the second side of the last lens of the optical lens, satisfy the following condition: 0.71≥BFL / TL≥0.

3.

11. The optical lens according to any one of claims 1 to 9, 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 total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane: 0.42≥BFL / TTL≥0.

3.

12. The optical lens according to any one of claims 1 to 9, characterized in that, The maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following condition: D1 / H / FOV≤0.

1.

13. The optical lens according to any one of claims 1 to 9, characterized in that, The maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: D1 / H / θ≤5.

14. The optical lens according to any one of claims 1 to 9, characterized in that, The maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: D1 / H / F≤0.

2.

15. The optical lens according to any one of claims 1 to 9, characterized in that, The total focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.53≥F*θ / D1≥0.

3.

16. The optical lens according to any one of claims 1 to 9, 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: 58.76 ≤ (FOV*F) / H ≤ 65.

17. The optical lens according to any one of claims 1 to 9, characterized in that, The second side half-aperture D10 of the fifth lens, 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 image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 73.60≥D10*BFL / H≥55.

18. The optical lens according to any one of claims 1 to 9, characterized in that, The second side half-aperture diameter D10 of the fifth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 3.30≥D10 / H≥2.

5.

19. The optical lens according to any one of claims 1 to 9, characterized in that, The radius of curvature R1 of the first side surface of the first lens and the maximum aperture D1 of the first side surface of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: R1 / D1≤-0.

4.

20. The optical lens according to any one of claims 1 to 9, 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: 0.1≤F / H≤3.

21. The optical lens according to any one of claims 1 to 9, characterized in that, The focal length F3 of the third lens satisfies the following relationship with the total focal length F of the optical lens: 3≥F3 / F≥0.

1.

22. The optical lens according to any one of claims 1 to 9, characterized in that, The focal length F4 of the fourth lens satisfies the following relationship with the total focal length F of the optical lens: 4.5 ≥ F4 / F ≥ 0.

1.

23. The optical lens according to any one of claims 1 to 9, characterized in that, The focal length F3 of the third lens, the radius of curvature R6 of the second side of the third lens, the focal length F4 of the fourth lens, and the radius of curvature R7 of the first side of the fourth lens satisfy the following condition: -1≤F3 / R6+F4 / R7≤1.

24. The optical lens according to any one of claims 1 to 9, characterized in that, The focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the following condition: 0.2 ≤ F3 / F4 ≤ 1.

5.

25. The optical lens according to any one of claims 1 to 9, characterized in that, The focal length F3 of the third lens and the focal length F5 of the fifth lens satisfy the following condition: 0.2 ≤ F3 / F5 ≤ 1.

5.

26. The optical lens according to any one of claims 1 to 9, characterized in that, The focal length F4 of the fourth lens and the focal length F5 of the fifth lens satisfy the following condition: 0.2 ≤ F4 / F5 ≤ 1.

8.

27. The optical lens according to any one of claims 1 to 9, characterized in that, The distance D between the aperture and the first side surface of the first lens S The distance TL between the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, satisfies: 0.5 ≥ D S / TL≥0.

001.

28. The optical lens according to any one of claims 1 to 9, characterized in that, The radius of curvature R2 of the second side surface of the first lens and the radius of curvature R3 of the first side surface of the second lens satisfy the following condition: 0.4≤R2 / R3≤1.

5.

29. The optical lens according to any one of claims 1 to 9, 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: -0.46≤R3 / R4≤-0.

001.

30. The optical lens according to any one of claims 1 to 9, 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: 0.59≤|R6| / |R7|≤1.

5.

31. The optical lens according to any one of claims 1 to 9, characterized in that, The optical lens satisfies at least one of the following conditions: 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 image plane, satisfies the following relationship between the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens: 0.71 ≥ BFL / TL ≥ 0.4; 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 total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane: 0.42≥BFL / TTL≥0.

34. The maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following: D1 / H / FOV≤0.08; The maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: D1 / H / θ≤4.5; The maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following relationship: D1 / H / F≤0.15; The total focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.53≥F*θ / D1≥0.

4. 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: 58.76 ≤ (FOV*F) / H ≤ 62. The second side half-aperture diameter D10 of the fifth lens, 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 image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 73.60≥D10*BFL / H≥60. The second side half-aperture diameter D10 of the fifth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 3.30≥D10 / H≥3; The radius of curvature R1 of the first side surface of the first lens and the maximum aperture D1 of the first side surface of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: R1 / D1≤-0.6; 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: 1≤F / H≤2.5; The focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: -1.8 ≤ F2 / F ≤ -0.5; The focal length F3 of the third lens satisfies the following relationship with the total focal length F of the optical lens: 1≤F3 / F≤3; The focal length F4 of the fourth lens satisfies the following relationship with the total focal length F of the optical lens: 1≤F4 / F≤4.5; The focal length F3 of the third lens, the radius of curvature R6 of the second side of the third lens, the focal length F4 of the fourth lens, and the radius of curvature R7 of the first side of the fourth lens satisfy the following condition: -0.8≤F3 / R6+F4 / R7≤0.5; The focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the following condition: 0.5 ≤ F3 / F4 ≤ 1.3; The focal length F3 of the third lens and the focal length F5 of the fifth lens satisfy the following condition: 0.4 ≤ F3 / F5 ≤ 1.2; The focal length F4 of the fourth lens and the focal length F5 of the fifth lens satisfy the following condition: 0.45 ≤ F4 / F5 ≤ 1.5; The distance D between the aperture and the first side surface of the first lens S The distance TL between the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, satisfies the following condition: 0.05 ≤ D S / TL≤0.2; The radius of curvature R2 of the second side surface of the first lens and the radius of curvature R3 of the first side surface of the second lens satisfy the following condition: 0.6 ≤ R2 / R3 ≤ 1.2; 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 The following conditions must be met: -0.46 ≤ R3 / R4 ≤ -0.05; 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: 0.59≤|R6| / |R7|≤1.

2.

32. The optical lens according to any one of claims 1 to 9, characterized in that, The optical lens satisfies at least one of the following conditions: 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 image plane, satisfies the following relationship between the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens: 0.71 ≥ BFL / TL ≥ 0.55; 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 total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane: 0.42≥BFL / TTL≥0.

35. The maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following: 0.07≤D1 / H / FOV≤0.08; The maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: 3.99≤D1 / H / θ≤4.18; The maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: 0.11≤D1 / H / F≤0.12; The total focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.53≥F*θ / D1≥0.51; 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: 58.76 ≤ (FOV*F) / H ≤ 59.01; The second side half-aperture diameter D10 of the fifth lens, 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), and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 73.60≥D10*BFL / H≥63.66; The image height corresponding to the second side half-light aperture D10 of the fifth lens and the maximum field of view of the optical lens The following condition must be met between H: 3.30 ≥ D10 / H ≥ 3.17; The radius of curvature R1 of the first side surface of the first lens and the maximum aperture D1 of the first side surface of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: -0.80≤R1 / D1≤-0.75; 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: 2.11≤F / H≤2.12; The focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: -1.64 ≤ F2 / F ≤ -0.99; The focal length F3 of the third lens satisfies the following relationship with the total focal length F of the optical lens: 2.07 ≤ F3 / F ≤ 2.59; The focal length F4 of the fourth lens satisfies the following relationship with the total focal length F of the optical lens: 2.37 ≤ F4 / F ≤ 3.46; The focal length F3 of the third lens, the radius of curvature R6 of the second side surface of the third lens, the focal length F4 of the fourth lens, and the radius of curvature R7 of the first side surface of the fourth lens satisfy the following condition: -0.61≤F3 / R6+F4 / R7≤0.25; The focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the following condition: 0.62 ≤ F3 / F4 ≤ 1.04; The focal length F3 of the third lens and the focal length F5 of the fifth lens satisfy the following condition: 0.53 ≤ F3 / F5 ≤ 0.87; The focal length F4 of the fourth lens and the focal length F5 of the fifth lens satisfy the following condition: 0.61 ≤ F4 / F5 ≤ 1.25; The distance D between the aperture and the first side surface of the first lens S The distance TL between the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, satisfies the following condition: 0.09 ≤ D S / TL≤0.10; The radius of curvature R2 of the second side surface of the first lens and the radius of curvature R3 of the first side surface of the second lens satisfy the following condition: 0.64≤R2 / R3≤1.00; 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: -0.46≤R3 / R4≤-0.10; 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: 0.59≤|R6| / |R7|≤1.

00.

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

Images