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 negative optical power, the first side of the first lens being a convex surface and the second side being a concave surface; a second lens with negative optical power, the first side of the second lens being a concave surface and the second side being a convex surface; a third lens with positive optical power, the first side of the third lens being a convex surface and the second side being a convex surface; a fourth lens with optical power; a fifth lens with optical power; and a sixth lens with positive optical power, the first side of the sixth lens being a convex surface. The application solves the problem that the optical lens in the prior art cannot simultaneously have a large field of view, miniaturization and high resolution.

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 car. At the same time, with the rapid development of autonomous driving assistance systems, the number of optical lenses used in automobiles is gradually increasing.

[0003] To meet the demands of assisted driving, optical lenses need to fulfill a variety of requirements. For example, to acquire information over a wider area and monitor all occupants and the environment within the vehicle, both interior and exterior lenses require a wider field of view. Interior lenses need to have a small front-end diameter to avoid affecting passenger comfort. Due to the increasing number of electronic components within vehicles, miniaturized optical lenses are preferred. For more accurate information acquisition, the system needs larger, higher-resolution chips, which places increasingly higher demands on the resolving power of optical lenses. Current optical lenses struggle to meet these diverse user needs.

[0004] In other words, existing optical lenses suffer from the problem of not being able to simultaneously achieve a large field of view, miniaturization, and high resolution. Summary of the Invention

[0005] The main objective of this invention is to provide an optical lens and an electronic device to solve the problem that existing optical lenses cannot simultaneously achieve a large field of view, miniaturization, and high resolution.

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

[0007] Furthermore, the fourth lens has negative optical power, and the first side surface of the fourth lens is concave, and the second side surface is concave.

[0008] Furthermore, the fourth lens has negative optical power, and its first side surface is convex while its second side surface is concave.

[0009] Furthermore, the fourth lens has positive optical power, and the first side surface of the fourth lens is convex, and the second side surface is convex.

[0010] Furthermore, the fifth lens has positive optical power, and both its first and second sides are convex.

[0011] Furthermore, the fifth lens has negative optical power, and the first side surface of the fifth lens is concave, and the second side surface is concave.

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

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

[0014] Furthermore, the fourth lens and the fifth lens are cemented together to form a cemented doublet lens.

[0015] Furthermore, the optical lens also includes an aperture stop, which is positioned between the second lens and the third lens.

[0016] Furthermore, the second, fourth, fifth, and sixth lenses are all aspherical lenses.

[0017] Furthermore, the fifth and / or sixth lenses are configured to be inverted.

[0018] Furthermore, 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 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: TTL / H / FOV≤0.1.

[0019] Furthermore, 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 of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following: TTL / H / θ≤4.

[0020] Furthermore, 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 of the optical lens, the total focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following: TTL / (F*θ)≤5.

[0021] Furthermore, the maximum aperture D 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 corresponding to the maximum field of view of the optical lens satisfy the following relationship: D / H / θ≤2.

[0022] Furthermore, the maximum aperture D 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: D / H / F≤2.

[0023] Furthermore, the maximum field of view (FOV) of the optical lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: FOV / TTL ≥ 12.5.

[0024] Furthermore, the focal length F3 of the third lens, the distance Dst from the aperture stop to the first side of the first lens, and the total focal length F of the optical lens satisfy the following condition: F3*Dst / F≤8.

[0025] Furthermore, the total optical length of the optical lens, that is, 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 of the optical lens, satisfies the following relationship with the total focal length F of the optical lens: 3≤TTL / F≤30.

[0026] Furthermore, the focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: -30≤F2 / F≤-1.

[0027] Furthermore, the focal length F1 of the first lens and the focal length F2 of the second lens satisfy the following condition: |F1 / F2|≤0.6.

[0028] 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: R2 / R3≤-0.01.

[0029] Furthermore, the overall focal length F of the optical lens, the radian value θ corresponding to the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.2≤F*θ / D≤1.8.

[0030] Furthermore, the focal length F of the entire optical lens and the focal length F6 of the sixth lens satisfy the following condition: F6 / F≤10.

[0031] Furthermore, the center thickness d1 of the first lens and the total focal length F of the optical lens satisfy the following condition: 0.25≤d1 / F≤0.6.

[0032] Furthermore, the overall focal length F of the optical lens, the radius of curvature R3 of the first side of the second lens, and the radius of curvature R4 of the second side of the second lens satisfy the following relationship: |F / R3|+|F / R4|≤5.

[0033] Furthermore, the radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy the following condition: 0.01≤|R6| / |R5|≤4.5.

[0034] Furthermore, 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: 1≤H / F≤4.

[0035] Furthermore, the focal length F45 of the cemented doublet composed of the fourth and fifth lenses satisfies the following relationship with the overall focal length F of the optical lens: -30≤F45 / F≤30.

[0036] Furthermore, the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the following condition with respect to the optical total length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens: 0.01≤BFL / TTL.

[0037] Furthermore, the center thickness d6 of the third lens and the center thickness d3 of the second lens satisfy the following condition: 0.1≤d6 / d3≤3.5.

[0038] 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 negative optical power; a second lens having negative optical power; a third lens having positive optical power; a fourth lens having optical power; a fifth lens having optical power; and a sixth lens having positive optical power; wherein the maximum field of view (FOV) of the optical lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, satisfy the following condition: FOV / TTL ≥ 12.5.

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

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

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

[0042] Furthermore, the fourth lens has negative optical power, and the first side surface of the fourth lens is concave, and the second side surface is concave.

[0043] Furthermore, the fourth lens has negative optical power, and its first side surface is convex while its second side surface is concave.

[0044] Furthermore, the fourth lens has positive optical power, and the first side surface of the fourth lens is convex, and the second side surface is convex.

[0045] Furthermore, the fifth lens has positive optical power, and both its first and second sides are convex.

[0046] Furthermore, the fifth lens has negative optical power, and the first side surface of the fifth lens is concave, and the second side surface is concave.

[0047] Furthermore, the first side of the sixth lens is convex, and the second side is concave.

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

[0049] Furthermore, the fourth lens and the fifth lens are cemented together to form a cemented doublet lens.

[0050] Furthermore, the optical lens also includes an aperture stop, which is positioned between the second lens and the third lens.

[0051] Furthermore, the second, fourth, fifth, and sixth lenses are all aspherical lenses.

[0052] Furthermore, the fifth and / or sixth lenses are configured to be inverted.

[0053] Furthermore, 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 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: TTL / H / FOV≤0.1.

[0054] Furthermore, 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 of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following: TTL / H / θ≤4.

[0055] Furthermore, 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 of the optical lens, the total focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following: TTL / (F*θ)≤5.

[0056] Furthermore, the maximum aperture D 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 corresponding to the maximum field of view of the optical lens satisfy the following relationship: D / H / θ≤2.

[0057] Furthermore, the maximum aperture D 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: D / H / F≤2.

[0058] Furthermore, the focal length F3 of the third lens, the distance Dst from the aperture stop to the first side of the first lens, and the total focal length F of the optical lens satisfy the following condition: F3*Dst / F≤8.

[0059] Furthermore, the total optical length of the optical lens, that is, 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 of the optical lens, satisfies the following relationship with the total focal length F of the optical lens: 3≤TTL / F≤30.

[0060] Furthermore, the focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: -30≤F2 / F≤-1.

[0061] Furthermore, the focal length F1 of the first lens and the focal length F2 of the second lens satisfy the following condition: |F1 / F2|≤0.6.

[0062] 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: R2 / R3≤-0.01.

[0063] Furthermore, the overall focal length F of the optical lens, the radian value θ corresponding to the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.2≤F*θ / D≤1.8.

[0064] Furthermore, the focal length F of the entire optical lens and the focal length F6 of the sixth lens satisfy the following condition: F6 / F≤10.

[0065] Furthermore, the center thickness d1 of the first lens and the total focal length F of the optical lens satisfy the following condition: 0.25≤d1 / F≤0.6.

[0066] Furthermore, the overall focal length F of the optical lens, the radius of curvature R3 of the first side of the second lens, and the radius of curvature R4 of the second side of the second lens satisfy the following relationship: |F / R3|+|F / R4|≤5.

[0067] Furthermore, the radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy the following condition: 0.01≤|R6| / |R5|≤4.5.

[0068] Furthermore, 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: 1≤H / F≤4.

[0069] Furthermore, the focal length F45 of the cemented doublet composed of the fourth and fifth lenses satisfies the following relationship with the overall focal length F of the optical lens: -30≤F45 / F≤30.

[0070] Furthermore, the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the following condition with respect to the optical total length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens: 0.01≤BFL / TTL.

[0071] Furthermore, the center thickness d6 of the third lens and the center thickness d3 of the second lens satisfy the following condition: 0.1≤d6 / d3≤3.5.

[0072] 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.

[0073] 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 negative optical power, a second lens with negative optical power, a third lens with positive optical power, a fourth lens with optical power, a fifth lens with optical power, and a sixth lens with positive optical power; the first side of the first lens is convex and the second side is concave; the first side of the second lens is concave and the second side is convex; the first side of the third lens is convex and the second side is convex; and the first side of the sixth lens is convex.

[0074] The first lens has negative optical power, diverging light rays to ensure a smooth transition in light path. It also allows large-angle light rays to enter as much as possible, increasing illumination and facilitating a shorter TTL (Time-To-Live) for subsequent light rays, while simultaneously increasing light transmission. The first side of the first lens is convex, and the second side is concave. Designing the first lens in a meniscus shape maximizes the collection of light rays from a wide field of view into the rear optical system, further increasing light transmission. The first lens is preferably made of a high-refractive-index material, which helps reduce the front aperture. Furthermore, the convex design of the first side helps control the aperture of the rear lens, enabling a miniaturized design.

[0075] The second lens has negative optical power and is preferably an aspherical lens. It has a diverging effect on light, which can disperse the central and peripheral rays in each field of view, enlarge the aperture, increase the system illumination, and facilitate the correction of aberrations between the central and peripheral rays to achieve high resolution. Under the same field of view, the light emitted from the second side of the first lens can provide a larger light receiving surface for the subsequent optical system, enabling a larger physical aperture of the aperture, a larger aperture ring, and a greater amount of light intake, thus increasing the brightness of the imaging surface. The first side of the second lens is concave, and the second side is convex. The concave surface of the first side of the second lens and the concave surface of the second side of the first lens cooperate to allow the light emitted from the second lens to smoothly enter the first side of the third lens, which is conducive to a smooth light transition, reduces light energy loss, and improves the illumination of the peripheral field of view. At the same time, it changes the trend of the peripheral rays, which can reduce the front aperture of the optical lens, reduce the size, and facilitate miniaturization and cost reduction. In addition, the second lens is preferably an aspherical lens, which is conducive to further improving resolution.

[0076] The third lens has positive optical power. The first side of the third lens is convex, and the second side is also convex. The third lens has positive optical power and has a converging effect on light, which is beneficial for reducing the front diameter of the optical lens, reducing its size, and facilitating miniaturization and cost reduction.

[0077] The sixth lens has positive optical power. Its first side surface is convex, and its second side surface is either concave or convex. Preferably, the sixth lens is an aspherical lens. When the second side surface of the sixth lens is concave, it has positive optical power and a gentle lens shape, allowing diverging light rays to smoothly enter the rear, further smoothing the light path transition and improving astigmatism and field curvature, thus enhancing the resolving power of the optical system. When the second side surface of the sixth lens is convex, its gentle lens shape also allows diverging light rays to smoothly enter the rear, further smoothing the light path transition and improving astigmatism and field curvature, thus enhancing the resolving power of the optical system.

[0078] This application employs six lenses. By optimizing the optical power and surface shape of each lens, the optical lens of this invention has at least one beneficial effect such as miniaturization, large field of view, high light transmission, high resolution, and low sensitivity. Attached Figure Description

[0079] 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:

[0080] Figure 1 A schematic diagram of the structure of an optical lens of Example 1 of the present invention is shown;

[0081] Figure 2 A schematic diagram of the structure of the optical lens of Example 2 of the present invention is shown;

[0082] Figure 3 A schematic diagram of the structure of the optical lens of Example 3 of the present invention is shown;

[0083] Figure 4 A schematic diagram of the structure of the optical lens of Example 4 of the present invention is shown;

[0084] Figure 5 A schematic diagram of the structure of the optical lens of Example 5 of the present invention is shown;

[0085] Figure 6 A schematic diagram of the structure of the optical lens of Example Six of the present invention is shown;

[0086] Figure 7 A schematic diagram of the structure of the optical lens of Example Seven of the present invention is shown;

[0087] Figure 8 A schematic diagram of the structure of the optical lens of Example 8 of the present invention is shown;

[0088] Figure 9 A schematic diagram of the structure of the optical lens of Example 9 of the present invention is shown;

[0089] Figure 10 A schematic diagram of the structure of the optical lens of Example 10 of the present invention is shown;

[0090] Figure 11 A schematic diagram of the structure of the optical lens of Example Eleven of the present invention is shown.

[0091] The above figures include the following reference numerals:

[0092] L1, First lens; S1, First side surface of the first lens; S2, Second side surface of the first lens; L2, Second lens; S3, First side surface of the second lens; S4, Second side surface of the second lens; STO, Aperture stop; L3, Third lens; S6, First side surface of the third lens; S7, Second side surface of the third lens; L4, Fourth lens; S8, First side surface of the fourth lens; S9, Second side surface of the fourth lens; L5, Fifth lens; S9, First side surface of the fifth lens; S10, Second side surface of the fifth lens; L6, Sixth lens; S11, First side surface of the sixth lens; S12, Second side surface of the sixth lens; S13, First side surface of the protective glass; S14, Second side surface of the protective glass; IMA, Imaging plane. Detailed Implementation

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] To address the problem that existing optical lenses cannot simultaneously achieve a large field of view, miniaturization, and high resolution, this invention provides an optical lens and an electronic device.

[0103] Example 1

[0104] like Figures 1 to 11 As shown, the optical lens includes, from the first side to the second side, a first lens with negative optical power, a second lens with negative optical power, a third lens with positive optical power, a fourth lens with optical power, a fifth lens with optical power, and a sixth lens with positive optical power; the first side of the first lens is convex and the second side is concave; the first side of the second lens is concave and the second side is convex; the first side of the third lens is convex and the second side is convex; and the first side of the sixth lens is convex.

[0105] The first lens has negative optical power, diverging light rays to ensure a smooth transition in light path. It also allows large-angle light rays to enter as much as possible, increasing illumination and facilitating a shorter TTL (Time-To-Live) for subsequent light rays, while simultaneously increasing light transmission. The first side of the first lens is convex, and the second side is concave. Designing the first lens in a meniscus shape maximizes the collection of light rays from a wide field of view into the rear optical system, further increasing light transmission. The first lens is preferably made of a high-refractive-index material, which helps reduce the front aperture. Furthermore, the convex design of the first side helps control the aperture of the rear lens, enabling a miniaturized design.

[0106] The second lens has negative optical power and is preferably an aspherical lens. It has a diverging effect on light, which can disperse the central and peripheral rays in each field of view, enlarge the aperture, increase the system illumination, and facilitate the correction of aberrations between the central and peripheral rays to achieve high resolution. Under the same field of view, the light emitted from the second side of the first lens can provide a larger light receiving surface for the subsequent optical system, enabling a larger physical aperture of the aperture, a larger aperture ring, and a greater amount of light intake, thus increasing the brightness of the imaging surface. The first side of the second lens is concave, and the second side is convex. The concave surface of the first side of the second lens and the concave surface of the second side of the first lens cooperate to allow the light emitted from the second lens to smoothly enter the first side of the third lens, which is conducive to a smooth light transition, reduces light energy loss, and improves the illumination of the peripheral field of view. At the same time, it changes the trend of the peripheral rays, which can reduce the front aperture of the optical lens, reduce the size, and facilitate miniaturization and cost reduction. In addition, the second lens is preferably an aspherical lens, which is conducive to further improving resolution.

[0107] The third lens has positive optical power. The first side of the third lens is convex, and the second side is also convex. The third lens has positive optical power and has a converging effect on light, which is beneficial for reducing the front diameter of the optical lens, reducing its size, and facilitating miniaturization and cost reduction.

[0108] The sixth lens has positive optical power. Its first side surface is convex, and its second side surface is either concave or convex. Preferably, the sixth lens is an aspherical lens. When the second side surface of the sixth lens is concave, it has positive optical power and a gentle lens shape, allowing diverging light rays to smoothly enter the rear, further smoothing the light path transition and improving astigmatism and field curvature, thus enhancing the resolving power of the optical system. When the second side surface of the sixth lens is convex, its gentle lens shape also allows diverging light rays to smoothly enter the rear, further smoothing the light path transition and improving astigmatism and field curvature, thus enhancing the resolving power of the optical system.

[0109] This application employs six lenses. By optimizing the optical power and surface shape of each lens, the optical lens of this invention has at least one beneficial effect such as miniaturization, large field of view, high light transmission, high resolution, and low sensitivity.

[0110] In this embodiment, the fourth lens has negative optical power, and the first side surface of the fourth lens is concave, and the second side surface is concave.

[0111] In this embodiment, the fourth lens has negative optical power, and the first side of the fourth lens is convex and the second side is concave.

[0112] In this embodiment, the fourth lens has positive optical power, and the first side surface of the fourth lens is convex, and the second side surface is convex.

[0113] In this embodiment, the fifth lens has positive optical power, and the first side surface of the fifth lens is convex, and the second side surface is convex.

[0114] In this embodiment, the fifth lens has negative optical power, and the first side surface of the fifth lens is concave, and the second side surface is concave.

[0115] Generally, the concave surface of the second side of the fourth lens matches the convex surface of the first side of the fifth lens, and the convex surface of the second side of the fourth lens matches the concave surface of the first side of the fifth lens. This arrangement is beneficial for the bonding and forming of the fourth and fifth lenses, compressing the air gap between them, and achieving a smooth transition of light.

[0116] In this embodiment, the fourth and fifth lenses are cemented together to form a cemented doublet lens. This allows light rays from the front lens to smoothly transition to the imaging plane, reducing the overall system length. Simultaneously, it enables the full correction of various aberrations in the optical system, improving resolution and optimizing optical performance such as distortion and CRA while maintaining a compact structure. Furthermore, the cemented doublet lens reduces the air gap between the two lenses, further reducing the overall system length; it also reduces the number of assembly components between the fourth and fifth lenses, simplifying processes and lowering costs; it reduces tolerance sensitivity issues such as tilting / eccentricity of the lens units during assembly; it reduces light loss due to reflections between the two lenses, improving illumination; and it further reduces field curvature, correcting off-axis point aberrations of the system.

[0117] In this embodiment, the second side surface of the sixth lens is concave. The sixth lens has positive optical power and a gently sloping shape, which allows diverging light rays to smoothly enter the rear, further smoothing the transition of light paths. This can improve astigmatism and field curvature in imaging, and enhance the resolving power of the optical system.

[0118] In this embodiment, the second side surface of the sixth lens is convex. The gentle shape of the sixth lens allows diverging light rays to smoothly enter the rear, further smoothing the transition of light paths, which can improve astigmatism and field curvature in imaging, and enhance the resolving power of the optical system.

[0119] In this embodiment, the optical lens also includes an aperture stop, which is disposed between the second lens and the third lens. By placing the aperture stop between the second lens and the third lens, it is beneficial for the aperture stop to effectively gather the light entering the optical system, reduce the lens aperture at the rear end of the optical system, and reduce the assembly sensitivity of the system.

[0120] In this embodiment, the second, fourth, fifth, and sixth lenses are all aspherical lenses. Using at least four aspherical lenses is beneficial for correcting system aberrations and improving resolution.

[0121] In this embodiment, only the fifth lens is inverted, or only the sixth lens is inverted, or both the fifth and sixth lenses are inverted. By appropriately setting the inversion, it is beneficial to balance aberrations and improve resolving power.

[0122] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, 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: TTL / H / FOV ≤ 0.1. Satisfying this condition effectively limits the length of the optical lens under the same imaging plane and the same field of view, providing miniaturization characteristics for the optical lens. Preferably, TTL / H / FOV ≤ 0.05.

[0123] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens, satisfy the condition: TTL / H / θ≤4. Satisfying this condition effectively limits the length of the optical lens under the same imaging plane and the same field of view, providing miniaturization characteristics for the optical lens. Preferably, TTL / H / θ≤2.

[0124] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, the total focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens, satisfy the condition: TTL / (F*θ)≤5. Satisfying this condition effectively limits the length of the optical lens when the focal length remains constant and the imaging plane is the same, providing miniaturization characteristics for the optical lens. Preferably, TTL / (F*θ)≤3.

[0125] In this embodiment, the maximum aperture D 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 corresponding to the maximum field of view of the optical lens satisfy the condition: D / H / θ≤2. Satisfying this condition allows the optical lens to have a large target surface and a small aperture while maintaining a constant angle. Preferably, D / H / θ≤1.

[0126] In this embodiment, the maximum aperture D 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: D / H / F≤2. Satisfying this condition allows the optical lens to have a large target surface and a small aperture while maintaining a constant focal length. Preferably, D / H / F≤1.

[0127] In this embodiment, the maximum field of view (FOV) of the optical lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, satisfy the condition: FOV / TTL ≥ 12.5. Satisfying this condition provides the optical lens with a large field of view and miniaturization characteristics for the same optical lens length. Preferably, FOV / TTL ≥ 13.8.

[0128] In this embodiment, the focal length F3 of the third lens, the distance Dst from the aperture stop to the first side of the first lens, and the total focal length F of the optical lens satisfy the condition: F3*Dst / F≤8. By rationally configuring the aperture stop position, the focal length of the third lens, and the total focal length of the optical lens within a controlled range, it is beneficial to converge the light and quickly transmit it to the rear, achieving a small front-end aperture and thus miniaturization. Preferably, F3*Dst / F≤7.7.

[0129] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: 3 ≤ TTL / F ≤ 30. If TTL / F is too small, the system sensitivity will be high; a larger TTL / F is beneficial for resolution and system sensitivity. Therefore, considering cost, miniaturization, system resolution, and sensitivity protection, a range is considered. Preferably, 4.2 ≤ TTL / F ≤ 15.

[0130] In this embodiment, the focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: -30 ≤ F2 / F ≤ -1. The second lens is a plastic lens. By rationally configuring the focal length of the second lens, it is beneficial to control the second lens to have a reasonable optical power ratio within the optical system, which is beneficial to the overall thermal compensation balance of the optical system and can effectively reduce thermal compensation. Preferably, -25 ≤ F2 / F ≤ -2.8.

[0131] In this embodiment, the focal length F1 of the first lens and the focal length F2 of the second lens satisfy the condition |F1 / F2|≤0.6. By reasonably allocating the focal lengths of the first and second lenses, a reasonable focal length ratio between the first and second lenses helps the front-end optical system to better receive off-axis light while ensuring a smooth transition of light within the system, which is beneficial for improving image quality. Preferably, |F1 / F2|≤0.55.

[0132] 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: R2 / R3 ≤ -0.01. By rationally configuring the radius of curvature of the second side surface of the first lens and the radius of curvature of the first side surface of the second lens, the light can transition smoothly to the rear, while reducing light energy loss and improving illuminance. Preferably, R2 / R3 ≤ -0.2.

[0133] In this embodiment, the overall focal length F of the optical lens, the radian value θ corresponding to the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.2 ≤ F*θ / D ≤ 1.8. Satisfying this condition allows for a smaller front aperture of the optical lens while maintaining a constant focal length, thus reducing the size of the imaging system. Preferably, 0.5 ≤ F*θ / D ≤ 1.4.

[0134] In this embodiment, the focal length F of the entire optical lens group and the focal length F6 of the sixth lens satisfy the condition: F6 / F≤10. Satisfying this condition ensures that the last lens has a short focal length, which helps to collect light and ensures sufficient light transmission. Preferably, F6 / F≤7.

[0135] In this embodiment, the center thickness d1 of the first lens and the total focal length F of the optical lens satisfy the following condition: 0.25 ≤ d1 / F ≤ 0.6. When the ratio between the center thickness of the first lens and the total focal length of the optical lens is controlled within this range, the front port diameter can be effectively limited, thereby achieving miniaturization. Preferably, 0.28 ≤ d1 / F ≤ 0.55.

[0136] In this embodiment, the overall focal length F of the optical lens, 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 relationship: |F / R3|+|F / R4|≤5. Controlling the surface curvature of the second lens allows for a smoother surface, enabling it to better receive off-axis light while ensuring that off-axis light travels to the rear optical system at a smaller angle, thus helping to correct off-axis astigmatism and improve image quality. Preferably, |F / R3|+|F / R4|≤3.

[0137] In this embodiment, the radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy the condition: 0.01 ≤ |R6| / |R5| ≤ 4.5. By rationally configuring the radius of curvature of the third lens, the light collected by the third lens is compressed, making the light path relatively smooth, thus allowing the light to transition smoothly to the rear. This effectively reduces system aberrations and improves system imaging quality. If the value is below the lower limit of this condition, the incident angle of the light rays incident on the first side surface of the third lens increases, leading to a decrease in relative illumination. Therefore, satisfying this condition allows for the acquisition of a high-quality, bright image. Preferably, 0.1 ≤ |R6| / |R5| ≤ 2.5.

[0138] In this embodiment, 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: 1 ≤ H / F ≤ 4. When the focal length and image height are controlled within this range, a reasonable focal length range at the same image height ensures that light can converge better on the imaging plane, which is beneficial for improving resolution. Preferably, 1.8 ≤ H / F ≤ 3.4.

[0139] In this embodiment, the focal length F45 of the cemented doublet lens composed of the fourth and fifth lenses satisfies the following relationship with the total focal length F of the optical lens: -30 ≤ F45 / F ≤ 30. Controlling the ratio between the focal length of the cemented doublet lens and the total focal length of the optical lens within this range is beneficial for correcting chromatic aberration and improving image quality. Preferably, -20 ≤ F45 / F ≤ 24.

[0140] In this embodiment, the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the condition 0.01 ≤ BFL / TTL 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. Satisfying this condition meets the specific requirements for the back focal length of the optical lens, and also reserves space for the installation and focusing of optical components, avoiding interference between mechanisms. Preferably, 0.1 ≤ BFL / TTL.

[0141] In this embodiment, the center thickness d6 of the third lens and the center thickness d3 of the second lens satisfy the condition: 0.1 ≤ d6 / d3 ≤ 3.5. Satisfying this condition ensures that the center thicknesses of the second and third lenses are close, contributing to minimal overall light refraction variation of the optical lens under high and low temperatures, resulting in excellent temperature performance. Preferably, 0.4 ≤ d6 / d3 ≤ 2.8.

[0142] Example 2

[0143] like Figures 1 to 11As shown, the optical lens, from the first side to the second side, sequentially includes a first lens with negative optical power, a second lens with negative optical power, a third lens with positive optical power, a fourth lens with optical power, a fifth lens with optical power, and a sixth lens with positive optical power. The maximum field of view (FOV) of the optical lens and its total optical length (TTL, i.e., the distance from the center of the first side of the first lens to the center of the imaging plane) satisfy the condition: FOV / TTL ≥ 12.5. Satisfying this condition provides a large field of view and miniaturization characteristics for the same optical lens length. Preferably, FOV / TTL ≥ 13.8.

[0144] In this embodiment, the first side of the first lens is convex, and the second side is concave. The first lens has negative optical power, diverging light to ensure a smooth transition of light path, while allowing large-angle light to enter as much as possible, increasing illumination and facilitating a reduction in the optical path length of the rear light source, thus achieving a short TTL and increasing light transmission. The convex first side and concave second side of the first lens, designed as a meniscus, can maximize the collection of light from a large field of view into the rear optical system, increasing light transmission. The first lens preferably uses a high-refractive-index material, which is beneficial for reducing the front aperture, and the convex design of the first side helps control the aperture of the rear lens, enabling a miniaturized design.

[0145] In this embodiment, the first side of the second lens is concave, and the second side is convex. The second lens has negative optical power and is preferably an aspherical lens. It has a diverging effect on light, which can disperse the central and peripheral rays of each field of view, enlarge the aperture, increase the system illumination, and facilitate the correction of aberrations between the peripheral and central rays to achieve high resolution. Under the same field of view, the light emitted from the second side of the first lens can provide a larger light receiving surface for the subsequent optical system, enabling a larger physical aperture of the aperture, a larger aperture ring, and a greater amount of light intake, thus increasing the brightness of the imaging surface. The first side of the second lens is concave, and the second side is convex. The concave surface of the first side of the second lens and the concave surface of the second side of the first lens cooperate to allow the light emitted from the second lens to be smoothly incident on the first side of the third lens, which is conducive to a smooth light transition, reduces light energy loss, and improves the illumination of the peripheral field of view. At the same time, it changes the trend of the peripheral rays, thereby reducing the front aperture of the optical lens, reducing the volume, and facilitating miniaturization and cost reduction. In addition, the second lens is preferably an aspherical lens, which is beneficial to further improve resolution.

[0146] In this embodiment, the first side surface of the third lens is convex, and the second side surface is also convex. The third lens has positive optical power and converges light rays, which helps to reduce the front diameter of the optical lens, reduce its size, and facilitates miniaturization and cost reduction.

[0147] In this embodiment, the fourth lens has negative optical power, and the first side surface of the fourth lens is concave, and the second side surface is concave.

[0148] In this embodiment, the fourth lens has negative optical power, and the first side of the fourth lens is convex and the second side is concave.

[0149] In this embodiment, the fourth lens has positive optical power, and the first side surface of the fourth lens is convex, and the second side surface is convex.

[0150] In this embodiment, the fifth lens has positive optical power, and the first side surface of the fifth lens is convex, and the second side surface is convex.

[0151] In this embodiment, the fifth lens has negative optical power, and the first side surface of the fifth lens is concave, and the second side surface is concave.

[0152] Generally, the concave surface of the second side of the fourth lens matches the convex surface of the first side of the fifth lens, and the convex surface of the second side of the fourth lens matches the concave surface of the first side of the fifth lens. This arrangement is beneficial for the bonding and forming of the fourth and fifth lenses, compressing the air gap between them, and achieving a smooth transition of light.

[0153] In this embodiment, the fourth and fifth lenses are cemented together to form a cemented doublet lens. This allows light rays from the front lens to smoothly transition to the imaging plane, reducing the overall system length. Simultaneously, it enables the full correction of various aberrations in the optical system, improving resolution and optimizing optical performance such as distortion and CRA while maintaining a compact structure. Furthermore, the cemented doublet lens reduces the air gap between the two lenses, further reducing the overall system length; it also reduces the number of assembly components between the fourth and fifth lenses, simplifying processes and lowering costs; it reduces tolerance sensitivity issues such as tilting / eccentricity of the lens units during assembly; it reduces light loss due to reflections between the two lenses, improving illumination; and it further reduces field curvature, correcting off-axis point aberrations of the system.

[0154] In this embodiment, the first side surface of the sixth lens is convex, and the second side surface is concave. The sixth lens is preferably an aspherical lens; the sixth lens has positive optical power and a gentle lens shape, which allows diverging light rays to smoothly enter the rear, further smoothing the light path transition, improving astigmatism and field curvature in imaging, and enhancing the resolving power of the optical system.

[0155] In this embodiment, the first side surface of the sixth lens is convex, and the second side surface is also convex. The sixth lens is preferably an aspherical lens, and its shape is relatively flat, which allows diverging light rays to smoothly enter the rear, further smoothing the light path transition. This can improve astigmatism and field curvature in imaging, and enhance the resolving power of the optical system.

[0156] This application employs six lenses. By optimizing the optical power and surface shape of each lens, the optical lens of this invention has at least one beneficial effect such as miniaturization, large field of view, high light transmission, high resolution, and low sensitivity.

[0157] In this embodiment, the optical lens also includes an aperture stop, which is disposed between the second lens and the third lens. By placing the aperture stop between the second lens and the third lens, it is beneficial for the aperture stop to effectively gather the light entering the optical system, reduce the lens aperture at the rear end of the optical system, and reduce the assembly sensitivity of the system.

[0158] In this embodiment, the second, fourth, fifth, and sixth lenses are all aspherical lenses. Using at least four aspherical lenses is beneficial for correcting system aberrations and improving resolution.

[0159] In this embodiment, only the fifth lens is inverted, or only the sixth lens is inverted, or both the fifth and sixth lenses are inverted. By appropriately setting the inversion, it is beneficial to balance aberrations and improve resolving power.

[0160] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, 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: TTL / H / FOV ≤ 0.1. Satisfying this condition effectively limits the length of the optical lens under the same imaging plane and the same field of view, providing miniaturization characteristics for the optical lens. Preferably, TTL / H / FOV ≤ 0.05.

[0161] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens, satisfy the condition: TTL / H / θ≤4. Satisfying this condition effectively limits the length of the optical lens under the same imaging plane and the same field of view, providing miniaturization characteristics for the optical lens. Preferably, TTL / H / θ≤2.

[0162] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, the total focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens, satisfy the condition: TTL / (F*θ)≤5. Satisfying this condition effectively limits the length of the optical lens when the focal length remains constant and the imaging plane is the same, providing miniaturization characteristics for the optical lens. Preferably, TTL / (F*θ)≤3.

[0163] In this embodiment, the maximum aperture D 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 corresponding to the maximum field of view of the optical lens satisfy the condition: D / H / θ≤2. Satisfying this condition allows the optical lens to have a large target surface and a small aperture while maintaining a constant angle. Preferably, D / H / θ≤1.

[0164] In this embodiment, the maximum aperture D 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: D / H / F≤2. Satisfying this condition allows the optical lens to have a large target surface and a small aperture while maintaining a constant focal length. Preferably, D / H / F≤1.

[0165] In this embodiment, the focal length F3 of the third lens, the distance Dst from the aperture stop to the first side of the first lens, and the total focal length F of the optical lens satisfy the condition: F3*Dst / F≤8. By rationally configuring the aperture stop position, the focal length of the third lens, and the total focal length of the optical lens within a controlled range, it is beneficial to converge the light and quickly transmit it to the rear, achieving a small front-end aperture and thus miniaturization. Preferably, F3*Dst / F≤7.7.

[0166] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: 3 ≤ TTL / F ≤ 30. If TTL / F is too small, the system sensitivity will be high; a larger TTL / F is beneficial for resolution and system sensitivity. Therefore, considering cost, miniaturization, system resolution, and sensitivity protection, a range is considered. Preferably, 4.2 ≤ TTL / F ≤ 15.

[0167] In this embodiment, the focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: -30 ≤ F2 / F ≤ -1. The second lens is a plastic lens. By rationally configuring the focal length of the second lens, it is beneficial to control the second lens to have a reasonable optical power ratio within the optical system, which is beneficial to the overall thermal compensation balance of the optical system and can effectively reduce thermal compensation. Preferably, -25 ≤ F2 / F ≤ -2.8.

[0168] In this embodiment, the focal length F1 of the first lens and the focal length F2 of the second lens satisfy the condition |F1 / F2|≤0.6. By reasonably allocating the focal lengths of the first and second lenses, a reasonable focal length ratio between the first and second lenses helps the front-end optical system to better receive off-axis light while ensuring a smooth transition of light within the system, which is beneficial for improving image quality. Preferably, |F1 / F2|≤0.55.

[0169] 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: R2 / R3 ≤ -0.01. By rationally configuring the radius of curvature of the second side surface of the first lens and the radius of curvature of the first side surface of the second lens, the light can transition smoothly to the rear, while reducing light energy loss and improving illuminance. Preferably, R2 / R3 ≤ -0.2.

[0170] In this embodiment, the overall focal length F of the optical lens, the radian value θ corresponding to the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.2 ≤ F*θ / D ≤ 1.8. Satisfying this condition allows for a smaller front aperture of the optical lens while maintaining a constant focal length, thus reducing the size of the imaging system. Preferably, 0.5 ≤ F*θ / D ≤ 1.4.

[0171] In this embodiment, the focal length F of the entire optical lens group and the focal length F6 of the sixth lens satisfy the condition: F6 / F≤10. Satisfying this condition ensures that the last lens has a short focal length, which helps to collect light and ensures sufficient light transmission. Preferably, F6 / F≤7.

[0172] In this embodiment, the center thickness d1 of the first lens and the total focal length F of the optical lens satisfy the following condition: 0.25 ≤ d1 / F ≤ 0.6. When the ratio between the center thickness of the first lens and the total focal length of the optical lens is controlled within this range, the front port diameter can be effectively limited, thereby achieving miniaturization. Preferably, 0.28 ≤ d1 / F ≤ 0.55.

[0173] In this embodiment, the overall focal length F of the optical lens, 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 relationship: |F / R3|+|F / R4|≤5. Controlling the surface curvature of the second lens allows for a smoother surface, enabling it to better receive off-axis light while ensuring that off-axis light travels to the rear optical system at a smaller angle, thus helping to correct off-axis astigmatism and improve image quality. Preferably, |F / R3|+|F / R4|≤3.

[0174] In this embodiment, the radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy the condition: 0.01 ≤ |R6| / |R5| ≤ 4.5. By rationally configuring the radius of curvature of the third lens, the light collected by the third lens is compressed, making the light path relatively smooth, thus allowing the light to transition smoothly to the rear. This effectively reduces system aberrations and improves system imaging quality. If the value is below the lower limit of this condition, the incident angle of the light rays incident on the first side surface of the third lens increases, leading to a decrease in relative illumination. Therefore, satisfying this condition allows for the acquisition of a high-quality, bright image. Preferably, 0.1 ≤ |R6| / |R5| ≤ 2.5.

[0175] In this embodiment, 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: 1 ≤ H / F ≤ 4. When the focal length and image height are controlled within this range, a reasonable focal length range at the same image height ensures that light can converge better on the imaging plane, which is beneficial for improving resolution. Preferably, 1.8 ≤ H / F ≤ 3.4.

[0176] In this embodiment, the focal length F45 of the cemented doublet lens composed of the fourth and fifth lenses satisfies the following relationship with the total focal length F of the optical lens: -30 ≤ F45 / F ≤ 30. Controlling the ratio between the focal length of the cemented doublet lens and the total focal length of the optical lens within this range is beneficial for correcting chromatic aberration and improving image quality. Preferably, -20 ≤ F45 / F ≤ 24.

[0177] In this embodiment, the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the condition 0.01 ≤ BFL / TTL 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. Satisfying this condition meets the specific requirements for the back focal length of the optical lens, and also reserves space for the installation and focusing of optical components, avoiding interference between mechanisms. Preferably, 0.1 ≤ BFL / TTL.

[0178] In this embodiment, the center thickness d6 of the third lens and the center thickness d3 of the second lens satisfy the condition: 0.1 ≤ d6 / d3 ≤ 3.5. Satisfying this condition ensures that the center thicknesses of the second and third lenses are close, contributing to minimal overall light refraction variation of the optical lens under high and low temperatures, resulting in excellent temperature performance. Preferably, 0.4 ≤ d6 / d3 ≤ 2.8.

[0179] 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.

[0180] The optical lens in this application can employ multiple lenses, such as the six 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 better curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. By using aspherical lenses, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality.

[0181] 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, fifth, and sixth 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 avoids lens blurring caused by high and low temperature variations in the operating environment, thus preventing 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 sixth lenses can all be aspherical glass lenses. Of course, in applications with lower temperature stability requirements, the first to sixth 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 sixth lenses in the optical lens can also be made of a combination of plastic and glass.

[0182] 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.

[0183] 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 six lenses are described as an example in the embodiments, the optical lens is not limited to including six lenses. If necessary, the optical lens may also include other numbers of lenses.

[0184] 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.

[0185] It should be noted that any of the examples one through eleven below are applicable to all embodiments of this application.

[0186] Example 1

[0187] like Figure 1 The diagram shown is a schematic of the optical lens structure of Example 1.

[0188] like Figure 1 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0189] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has negative optical power, its first side surface S8 is concave, and its second side surface S9 is concave. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0190] In this example, the total effective focal length F of the optical lens is 1.746mm, the maximum field of view (FOV) of the optical lens is 190.000°, and the total length (TTL) of the optical lens is 13.121mm.

[0191] In this example, the first side surface S9 of the fifth lens, the second side surface S10 of the fifth lens, and the second side surface S12 of the sixth lens are all provided with inversion.

[0192] 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).

[0193] Surf Radius Thickness Nd Vd 1 8.377 0.675 1.80 46.57 2 1.950 2.038 3 -2.425 1.711 1.54 56.11 4 -3.626 0.260 STO Infinity -0.052 6 5.795 2.181 1.83 42.73 7 -2.939 0.352 8 -4.965 0.640 1.64 23.53 9 1.474 1.892 1.54 56.11 10 -8.855 0.100 11 5.324 1.069 1.54 56.11 12 -18.333 0.353 13 Infinity 0.900 1.52 64.21 14 Infinity 1.002 IMA / /

[0194] Table 1

[0195] In Example 1, the surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0196]

[0197] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); K is the conic coefficient; A, B, C, D, E, F, and G are all higher-order coefficients. Table 2 below shows the conic coefficient K and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspherical lens surfaces S3, S4, S8, S9, S10, S11, and S12 in Example 1.

[0198]

[0199] Table 2

[0200] Example 2

[0201] like Figure 2 The diagram shown is a schematic of the optical lens structure for Example 2. For the sake of brevity, descriptions similar to those in Example 1 will be omitted in this example and the following examples.

[0202] like Figure 2 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0203] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has negative optical power, its first side surface S8 is concave, and its second side surface S9 is concave. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0204] In this example, the total effective focal length F of the optical lens is 1.716mm, the maximum field of view (FOV) of the optical lens is 190.000°, and the total length (TTL) of the optical lens is 13.121mm.

[0205] Table 3 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).

[0206] Surf Radius Thickness Nd Vd 1 8.377 0.675 1.80 46.57 2 1.950 2.038 3 -2.450 1.711 1.54 56.11 4 -3.626 0.260 STO Infinity -0.052 6 5.795 2.181 1.83 42.73 7 -2.910 0.352 8 -5.118 0.640 1.64 23.53 9 1.474 1.892 1.54 56.11 10 -8.855 0.100 11 5.324 1.069 1.54 56.11 12 -18.333 0.353 13 Infinity 0.900 1.52 64.21 14 Infinity 1.002 IMA / /

[0207] Table 3

[0208] Table 4 below shows the conic coefficient K and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S3, S4, S8, S9, S10, S11, and S12 in Example 2.

[0209]

[0210] Table 4

[0211] Example 3

[0212] like Figure 3 The diagram shown is a schematic of the optical lens structure in Example 3.

[0213] like Figure 3 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0214] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has negative optical power, its first side surface S8 is concave, and its second side surface S9 is concave. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is concave. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0215] In this example, the total effective focal length F of the optical lens is 1.782mm, the maximum field of view (FOV) of the optical lens is 190.000°, and the total length (TTL) of the optical lens is 13.440mm.

[0216] Table 5 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).

[0217] Surf Radius Thickness Nd Vd 1 8.954 0.903 1.80 46.57 2 1.965 2.047 3 -2.621 1.781 1.54 56.11 4 -3.785 0.308 STO Infinity -0.052 6 5.587 2.223 1.83 42.73 7 -2.971 0.334 8 -5.227 0.532 1.64 23.53 9 1.481 1.942 1.54 56.11 10 -8.927 0.100 11 5.010 1.028 1.54 56.11 12 110.000 0.355 13 Infinity 0.900 1.52 64.21 14 Infinity 1.039 IMA / /

[0218] Table 5

[0219] Table 6 below shows the conic coefficient K and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S3, S4, S8, S9, S10, S11, and S12 in Example 3.

[0220]

[0221] Table 6

[0222] Example 4

[0223] like Figure 4 The diagram shown is a schematic of the optical lens structure of Example 4.

[0224] like Figure 4 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0225] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has negative optical power, its first side surface S8 is concave, and its second side surface S9 is concave. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is concave. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0226] In this example, the total effective focal length F of the optical lens is 1.772mm, the maximum field of view (FOV) of the optical lens is 190.000°, and the total length (TTL) of the optical lens is 13.431mm.

[0227] Table 7 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).

[0228] Surf Radius Thickness Nd Vd 1 9.045 0.903 1.80 46.57 2 1.926 2.047 3 -2.621 1.772 1.54 56.11 4 -3.785 0.308 STO Infinity -0.052 6 5.587 2.223 1.83 42.73 7 -2.986 0.334 8 -5.227 0.532 1.64 23.53 9 1.481 1.942 1.54 56.11 10 -8.927 0.100 11 5.010 1.028 1.54 56.11 12 110.000 0.355 13 Infinity 0.900 1.52 64.21 14 Infinity 1.039 IMA / /

[0229] Table 7

[0230] Table 8 below shows the conic coefficient K and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S3, S4, S8, S9, S10, S11, and S12 in Example 4.

[0231]

[0232]

[0233] Table 8

[0234] Example 5

[0235] like Figure 5 The diagram shown is a schematic of the optical lens structure of Example 5.

[0236] like Figure 5As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0237] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has negative optical power, its first side surface S8 is concave, and its second side surface S9 is concave. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0238] In this example, the total effective focal length F of the optical lens is 1.690mm, the maximum field of view (FOV) of the optical lens is 190.000°, and the total length (TTL) of the optical lens is 13.121mm.

[0239] In this example, the second side surface S12 of the sixth lens is set to be inverted.

[0240] Table 9 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).

[0241]

[0242]

[0243] Table 9

[0244] Table 10 below shows the conic coefficient K and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S3, S4, S8, S9, S10, S11, and S12 in Example 5.

[0245]

[0246] Table 10

[0247] Example 6

[0248] like Figure 6 The diagram shown is a schematic of the optical lens structure of Example 6.

[0249] like Figure 6 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0250] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has negative optical power, its first side surface S8 is concave, and its second side surface S9 is concave. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0251] In this example, the total effective focal length F of the optical lens is 1.705mm, the maximum field of view (FOV) of the optical lens is 190.000°, and the total length (TTL) of the optical lens is 13.109mm.

[0252] In this example, the second side surface S12 of the sixth lens is set to be inverted.

[0253] Table 11 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).

[0254] Surf Radius Thickness Nd Vd 1 8.371 0.691 1.80 46.57 2 1.950 2.038 3 -2.451 1.717 1.54 56.11 4 -3.482 0.270 STO Infinity -0.052 6 5.952 2.169 1.83 42.73 7 -2.943 0.351 8 -5.150 0.635 1.64 23.53 9 1.459 1.883 1.54 56.11 10 -8.866 0.100 11 5.261 1.060 1.54 56.11 12 -16.211 0.350 13 Infinity 0.900 1.52 64.21 14 Infinity 0.997 IMA / /

[0255] Table 11

[0256] Table 12 below shows the conic coefficient K and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S3, S4, S8, S9, S10, S11, and S12 in Example 6.

[0257]

[0258] Table 12

[0259] Example 7

[0260] like Figure 7 The diagram shown is a schematic of the optical lens structure of Example 7.

[0261] like Figure 7 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0262] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has negative optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0263] In this example, the total effective focal length F of the optical lens is 1.714mm, the maximum field of view (FOV) of the optical lens is 190.000°, and the total length (TTL) of the optical lens is 11.934mm.

[0264] In this example, the first side surface S11 of the sixth lens is curved.

[0265] Table 13 shows the basic structural parameters of the optical lens of Example 7, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0266] Surf Radius Thickness Nd Vd 1 9.130 0.648 1.80 46.57 2 2.038 1.727 3 -2.655 1.682 1.54 56.11 4 -6.544 0.349 STO Infinity -0.052 6 5.325 1.366 1.83 42.73 7 -3.728 0.189 8 10.000 0.657 1.64 23.53 9 1.277 2.055 1.54 56.11 10 -12.581 0.100 11 267.411 1.270 1.54 56.11 12 -5.708 0.198 13 Infinity 0.900 1.52 64.21 14 Infinity 0.845 IMA / /

[0267] Table 13

[0268] Table 14 below shows the conic coefficient K and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S3, S4, S8, S9, S10, S11, and S12 in Example 7.

[0269]

[0270] Table 14

[0271] Example 8

[0272] like Figure 8 The diagram shown is a schematic of the optical lens structure of Example 8.

[0273] like Figure 8 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0274] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has negative optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0275] In this example, the total effective focal length F of the optical lens is 1.839mm, the maximum field of view (FOV) of the optical lens is 190.000°, and the total length (TTL) of the optical lens is 10.791mm.

[0276] In this example, the first side surface S11 of the sixth lens is curved.

[0277] Table 15 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).

[0278] Surf Radius Thickness Nd Vd 1 10.570 0.692 1.80 46.57 2 2.126 1.529 3 -2.320 1.502 1.54 56.11 4 -5.285 0.097 STO Infinity -0.052 6 4.120 1.168 1.83 42.73 7 -4.962 0.238 8 5.000 0.659 1.64 23.53 9 1.038 2.313 1.54 56.11 10 -27.362 0.351 11 5.623 0.747 1.54 56.11 12 -33.429 0.347 13 Infinity 0.900 1.52 64.21 14 Infinity 0.303 IMA / /

[0279] Table 15

[0280] Table 16 below shows the conic coefficient K and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S3, S4, S8, S9, S10, S11, and S12 in Example 8.

[0281]

[0282] Table 16

[0283] Example 9

[0284] like Figure 9 The diagram shown is a schematic of the optical lens structure of Example 9.

[0285] like Figure 9 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0286] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0287] In this example, the total effective focal length F of the optical lens is 1.693mm, the maximum field of view (FOV) of the optical lens is 190.000°, and the total length (TTL) of the optical lens is 12.198mm.

[0288] Table 17 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).

[0289]

[0290]

[0291] Table 17

[0292] Table 18 below shows the conic coefficient K and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S3, S4, S8, S9, S10, S11, and S12 in Example 9.

[0293]

[0294] Table 18

[0295] Example 10

[0296] like Figure 10 The diagram shown is a schematic of the optical lens structure of Example 10.

[0297] like Figure 10 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0298] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0299] In this example, the total effective focal length F of the optical lens is 1.780mm, the maximum field of view (FOV) of the optical lens is 190.000°, and the total length (TTL) of the optical lens is 12.853mm.

[0300] In this example, the second side surface S12 of the sixth lens is set to be inverted.

[0301] Table 19 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).

[0302] Surf Radius Thickness Nd Vd 1 13.016 0.557 1.80 46.57 2 2.382 2.072 3 -1.790 0.996 1.54 56.11 4 -2.486 0.211 STO Infinity -0.020 6 19.261 2.095 1.83 42.73 7 -3.125 0.181 8 16.376 1.723 1.54 56.11 9 -1.928 0.891 1.64 23.53 10 4.309 0.105 11 4.898 1.839 1.54 56.11 12 -2.498 0.752 13 Infinity 0.900 1.52 64.21 14 Infinity 0.552 IMA / /

[0303] Table 19

[0304] Table 20 below shows the conic coefficient K and the coefficients A, B, C, D, E, F, G of each higher-order term that can be used for the aspherical lens surfaces S3, S4, S8, S9, S10, S11, and S12 in Example 10.

[0305]

[0306] Table 20

[0307] Example 11

[0308] like Figure 11 The diagram shown is a schematic of the optical lens structure of Example 11.

[0309] like Figure 11 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0310] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0311] In this example, the total effective focal length F of the optical lens is 1.801mm, the maximum field of view (FOV) of the optical lens is 190.000°, and the total length (TTL) of the optical lens is 12.961mm.

[0312] In this example, the second side surface S12 of the sixth lens is set to be inverted.

[0313] Table 21 shows the basic structural parameters of the optical lens in Example 11, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0314] Surf Radius Thickness Nd Vd 1 11.586 0.600 1.80 46.57 2 2.282 2.006 3 -1.615 0.990 1.54 56.11 4 -2.121 0.213 STO Infinity -0.010 6 24.543 2.077 1.83 42.73 7 -3.117 0.178 8 50.000 2.026 1.54 56.11 9 -1.446 0.916 1.64 23.53 10 49.997 0.105 11 14.926 1.677 1.54 56.11 12 -2.885 0.622 13 Infinity 0.900 1.52 64.21 14 Infinity 0.661 IMA / /

[0315] Table 21

[0316] Table 22 below shows the conic coefficient K and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S3, S4, S8, S9, S10, S11, and S12 in Example 11.

[0317]

[0318] Table 22

[0319] In summary, Examples 1 through 11 satisfy the relationships shown in Table 23.

[0320] Conditional / Example 1 2 3 4 5 6 7 8 9 10 11 TTL / H / FOV 0.014 0.014 0.014 0.015 0.014 0.014 0.013 0.012 0.013 0.014 0.014 TTL / H / θ 0.822 0.828 0.829 0.835 0.824 0.814 0.750 0.682 0.766 0.806 0.813 TTL / (F*θ) 2.266 2.305 2.275 2.286 2.341 2.318 2.099 1.770 2.173 2.178 2.170 D / H / θ 0.452 0.455 0.484 0.523 0.455 0.448 0.405 0.368 0.381 0.397 0.407 D / H / F 0.859 0.880 0.900 0.979 0.892 0.871 0.783 0.663 0.747 0.739 0.750 FOV / TTL 14.481 14.481 14.137 14.147 14.481 14.494 15.921 17.608 15.576 14.782 14.659 F3*Dst / F 7.033 7.109 7.414 7.464 7.344 7.301 7.212 5.917 6.510 7.212 7.214 TTL / F 7.515 7.644 7.544 7.580 7.763 7.688 6.962 5.869 7.207 7.221 7.195 F2 / F -15.526 -16.630 -19.126 -19.120 -19.112 -21.626 -5.696 -5.071 -3.535 -13.353 -22.206 |F1 / F2| 0.122 0.116 0.097 0.095 0.101 0.090 0.347 0.367 0.520 0.155 0.091 R2 / R3 -0.804 -0.796 -0.750 -0.735 -0.787 -0.795 -0.768 -0.916 -1.111 -1.330 -1.413 F*θ / D 0.802 0.788 0.753 0.699 0.775 0.783 0.883 1.049 0.924 0.933 0.920 F6 / F 4.453 4.529 5.446 5.476 4.469 4.396 6.056 4.888 2.330 1.888 2.574 d1 / F 0.386 0.393 0.507 0.510 0.409 0.405 0.378 0.376 0.321 0.313 0.333 |F / R3|+|F / R4| 1.201 1.174 1.150 1.144 1.165 1.185 0.908 1.140 1.349 1.710 1.965 |R6| / |R5| 0.507 0.502 0.532 0.534 0.490 0.494 0.700 1.204 1.809 0.162 0.127 H / F 2.757 2.785 2.745 2.737 2.840 2.850 2.798 2.594 2.839 2.702 2.669 f45 / f -4.514 -4.727 -4.650 -4.675 -4.821 -4.751 22.603 11.028 -14.345 -3.373 -7.376 BFL / TTL 0.172 0.172 0.171 0.171 0.171 0.171 0.163 0.144 0.185 0.171 0.168 d6 / d3 1.275 1.275 1.248 1.254 1.263 1.263 0.812 0.778 1.178 2.103 2.098

[0321] Table 23

[0322] Table 24 gives the total focal length F of the optical lenses for Examples 1 to 11, and the focal lengths of each lens from F1 to F6, etc. (unit: mm).

[0323]

[0324]

[0325] Table 24

[0326] 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.

[0327] 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.

[0328] 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.

[0329] 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 has a total of six lenses, which are sequentially arranged from the first side to the second side as follows: A first lens with negative optical power, wherein the first side surface of the first lens is convex and the second side surface is concave; A second lens with negative optical power, wherein the first side of the second lens is concave and the second side is convex; A third lens with positive optical power, wherein the first side surface of the third lens is convex and the second side surface is convex; A fourth lens with negative optical power; A fifth lens with positive optical power; A sixth lens with positive optical power, wherein the first side surface of the sixth lens is convex; 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 of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: 5.869≤TTL / F≤7.

763.

2. The optical lens of claim 1, wherein, The fourth lens has negative optical power, and the first side surface of the fourth lens is concave, and the second side surface is concave.

3. The optical lens of claim 1, wherein, The fourth lens has negative optical power, and the first side of the fourth lens is convex and the second side is concave.

4. The optical lens of claim 1, wherein, The fifth lens has positive optical power, and the first side surface of the fifth lens is convex, and the second side surface is convex.

5. The optical lens of claim 1, wherein, The second side surface of the sixth lens is concave.

6. The optical lens of claim 1, wherein, The second side surface of the sixth lens is convex.

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

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

9. The optical lens according to claim 1, characterized in that, The second lens, the fourth lens, the fifth lens, and the sixth lens are all aspherical lenses.

10. The optical lens according to claim 1, characterized in that, The fifth lens and / or the sixth lens are configured to be inverted.

11. The optical lens according to any one of claims 1 to 10, characterized in that, 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 surface 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: 0.012≤TTL / H / FOV≤0.

05.

12. The optical lens according to any one of claims 1 to 10, characterized in that, 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 surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.682≤TTL / H / θ≤2.

13. The optical lens according to any one of claims 1 to 10, characterized in that, 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 surface of the optical lens, the total focal length F of the optical lens and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following: 1.770≤TTL / (F*θ)≤3.

14. The optical lens according to any one of claims 1 to 10, characterized in that, The maximum aperture D 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 corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.368≤D / H / θ≤1.

15. The optical lens according to any one of claims 1 to 10, characterized in that, The maximum aperture D 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: D / H / F≤1.

16. The optical lens according to any one of claims 1 to 10, characterized in that, The maximum field of view (FOV) of the optical lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 12.5 ≤ FOV / TTL ≤ 17.

608.

17. The optical lens according to any one of claims 1 to 10, characterized in that, The focal length F3 of the third lens, the distance Dst from the aperture stop to the first side of the first lens, and the total focal length F of the optical lens satisfy the following condition: 5.917≤F3*Dst / F≤8.

18. The optical lens according to any one of claims 1 to 10, characterized in that, 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 of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: 5.869≤TTL / F≤6.

962.

19. The optical lens according to any one of claims 1 to 10, characterized in that, The focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: -30≤F2 / F≤-1.

20. The optical lens according to any one of claims 1 to 10, characterized in that, The focal length F1 of the first lens and the focal length F2 of the second lens satisfy the condition: |F1 / F2|≤0.

6.

21. The optical lens according to any one of claims 1 to 10, 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: -1.413≤R2 / R3≤-0.

2.

22. The optical lens according to any one of claims 1 to 10, characterized in that, The total focal length F of the optical lens, the radian value θ corresponding to the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.5≤F*θ / D≤1.

4.

23. The optical lens according to any one of claims 1 to 10, characterized in that, The focal length F of the optical lens and the focal length F6 of the sixth lens satisfy the following condition: F6 / F≤7.

24. The optical lens according to any one of claims 1 to 10, characterized in that, The center thickness d1 of the first lens and the total focal length F of the optical lens satisfy the following condition: 0.25≤d1 / F≤0.

6.

25. The optical lens according to any one of claims 1 to 10, characterized in that, The total focal length F of the optical lens, the radius of curvature R3 of the first side of the second lens, and the radius of curvature R4 of the second side of the second lens satisfy the following relationship: |F / R3|+|F / R4|≤3.

26. The optical lens according to any one of claims 1 to 10, characterized in that, The radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy the following condition: 0.1≤|R6| / |R5|≤2.

5.

27. The optical lens according to any one of claims 1 to 10, characterized in that, 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: 1 ≤ H / F ≤ 3.

4.

28. The optical lens according to any one of claims 1 to 10, characterized in that, The focal length F45 of the cemented doublet formed by the fourth lens and the fifth lens satisfies the following relationship with the total focal length F of the optical lens: -30≤F45 / F≤30.

29. The optical lens according to any one of claims 1 to 10, 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 optical total 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 of the optical lens, satisfy the following condition: 0.01≤BFL / TTL≤0.

185.

30. The optical lens according to any one of claims 1 to 10, characterized in that, The center thickness d6 of the third lens and the center thickness d3 of the second lens satisfy the following condition: 0.1≤d6 / d3≤3.

5.

31. The optical lens according to any one of claims 1 to 10, characterized in that, The optical lens satisfies at least one of the following conditions: 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 surface 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: 0.012≤TTL / H / FOV≤0.

015. 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 surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following: 0.682≤TTL / H / θ≤0.835; 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 of the optical lens, the total focal length F of the optical lens and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following: 1.770≤TTL / (F*θ)≤2.341; The maximum aperture D 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 corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.368≤D / H / θ≤0.523; The maximum aperture D 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: 0.663≤D / H / F≤1. The maximum field of view (FOV) of the optical lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 14.137≤FOV / TTL≤17.

608. The focal length F3 of the third lens, the distance Dst from the aperture stop to the first side of the first lens, and the total focal length F of the optical lens satisfy the following condition: 5.917≤F3*Dst / F≤7.

464. The focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: -21.626 ≤ F2 / F ≤ -5.071; The focal length F1 of the first lens and the focal length F2 of the second lens satisfy the following condition: 0.090 ≤ |F1 / F2| ≤ 0.367; 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: -0.916≤R2 / R3≤-0.735; The total focal length F of the optical lens, the radian value θ corresponding to the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following: 0.699≤F*θ / D≤1.049; The focal length F of the entire optical lens and the focal length F6 of the sixth lens satisfy the following condition: 4.396≤F6 / F≤6.056; The center thickness d1 of the first lens and the total focal length F of the optical lens satisfy the following relationship: 0.28 ≤ d1 / F ≤ 0.510; The total focal length F of the optical lens, the radius of curvature R3 of the first side of the second lens, and the radius of curvature R4 of the second side of the second lens satisfy the following condition: 0.908≤|F / R3|+|F / R4|≤3; The radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy the following condition: 0.490≤|R6| / |R5|≤2.5; 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: 1.8 ≤ H / F ≤ 2.850; The focal length F45 of the cemented doublet lens composed of the fourth lens and the fifth lens satisfies the following relationship with the total focal length F of the optical lens: -4.821≤F45 / F≤24; 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 optical total 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 of the optical lens, satisfy the following condition: 0.144≤BFL / TTL≤0.

172. The center thickness d6 of the third lens and the center thickness d3 of the second lens satisfy the following condition: 0.4 ≤ d6 / d3 ≤ 1.

275.

32. The optical lens according to any one of claims 1 to 10, characterized in that, The optical lens satisfies at least one of the following conditions: 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 surface 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: 0.012≤TTL / H / FOV≤0.

013. 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 surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.682≤TTL / H / θ≤0.

750. 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 of the optical lens, the total focal length F of the optical lens and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following: 1.770≤TTL / (F*θ)≤2.099; The maximum aperture D 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 corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.368≤D / H / θ≤0.405; The maximum aperture D 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: 0.663≤D / H / F≤0.783; The maximum field of view (FOV) of the optical lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 15.921≤FOV / TTL≤17.

608. The focal length F3 of the third lens, the distance Dst from the aperture stop to the first side of the first lens, and the total focal length F of the optical lens satisfy the following condition: 5.917≤F3*Dst / F≤7.212; The focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: -5.696 ≤ F2 / F ≤ -5.071; The focal length F1 of the first lens and the focal length F2 of the second lens satisfy the following condition: 0.347 ≤ |F1 / F2| ≤ 0.367; 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: -0.916≤R2 / R3≤-0.768; The total focal length F of the optical lens, the radian value θ corresponding to the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following: 0.883≤F*θ / D≤1.

049. The focal length F of the entire optical lens and the focal length F6 of the sixth lens satisfy the following condition: 4.888≤F6 / F≤6.056; The center thickness d1 of the first lens and the total focal length F of the optical lens satisfy the following relationship: 0.28 ≤ d1 / F ≤ 0.378; The total focal length F of the optical lens, the radius of curvature R3 of the first side of the second lens, and the radius of curvature R4 of the second side of the second lens satisfy the following condition: 0.908≤|F / R3|+|F / R4|≤1.140; The radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy the following condition: 0.700≤|R6| / |R5|≤1.204; 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: 2.594 ≤ H / F ≤ 2.798; The focal length F45 of the cemented doublet lens composed of the fourth lens and the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 11.028≤F45 / F≤22.603; 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 optical total 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 of the optical lens, satisfy the following condition: 0.144≤BFL / TTL≤0.

163. The center thickness d6 of the third lens and the center thickness d3 of the second lens satisfy the following condition: 0.778 ≤ d6 / d3 ≤ 0.

812.

33. An optical lens, characterized in that, The optical lens has a total of six lenses, which are sequentially arranged from the first side to the second side as follows: A first lens with negative optical power; A second lens with negative optical power; A third lens with positive optical power; A fourth lens with negative optical power; A fifth lens with positive optical power; A sixth lens with positive optical power; Wherein, the maximum field of view (FOV) of the optical lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy the following condition: 12.5≤FOV / TTL≤17.

608. 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 of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: 5.869≤TTL / F≤7.

763.

34. The optical lens according to claim 33, characterized in that, The first side of the first lens is convex, and the second side is concave.

35. The optical lens according to claim 33, characterized in that, The first side of the second lens is concave, and the second side is convex.

36. The optical lens according to claim 33, characterized in that, The first side surface of the third lens is convex, and the second side surface is convex.

37. The optical lens according to claim 33, characterized in that, The fourth lens has negative optical power, and the first side surface of the fourth lens is concave, and the second side surface is concave.

38. The optical lens according to claim 33, characterized in that, The fourth lens has negative optical power, and the first side of the fourth lens is convex and the second side is concave.

39. The optical lens according to claim 33, characterized in that, The fifth lens has positive optical power, and the first side surface of the fifth lens is convex, and the second side surface is convex.

40. The optical lens according to claim 33, characterized in that, The first side of the sixth lens is convex, and the second side is concave.

41. The optical lens according to claim 33, characterized in that, The first side surface of the sixth lens is convex, and the second side surface is convex.

42. The optical lens according to claim 33, characterized in that, The fourth lens and the fifth lens are cemented together to form a cemented doublet lens.

43. The optical lens according to claim 33, characterized in that, The optical lens also includes an aperture stop, which is disposed between the second lens and the third lens.

44. The optical lens according to claim 33, characterized in that, The second lens, the fourth lens, the fifth lens, and the sixth lens are all aspherical lenses.

45. The optical lens according to claim 33, characterized in that, The fifth lens and / or the sixth lens are configured to be inverted.

46. ​​The optical lens according to any one of claims 33 to 45, characterized in that, 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 surface 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: 0.012≤TTL / H / FOV≤0.

05.

47. The optical lens according to any one of claims 33 to 45, characterized in that, 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 surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.682≤TTL / H / θ≤2.

48. The optical lens according to any one of claims 33 to 45, characterized in that, 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 surface of the optical lens, the total focal length F of the optical lens and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following: 1.770≤TTL / (F*θ)≤3.

49. The optical lens according to any one of claims 33 to 45, characterized in that, The maximum aperture D 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 corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.368≤D / H / θ≤1.

50. The optical lens according to any one of claims 33 to 45, characterized in that, The maximum aperture D 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: D / H / F≤1.

51. The optical lens according to any one of claims 33 to 45, characterized in that, The focal length F3 of the third lens, the distance Dst from the aperture stop to the first side of the first lens, and the total focal length F of the optical lens satisfy the following condition: 5.917≤F3*Dst / F≤8.

52. The optical lens according to any one of claims 33 to 45, characterized in that, 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 of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: 5.869≤TTL / F≤6.

962.

53. The optical lens according to any one of claims 33 to 45, characterized in that, The focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: -30≤F2 / F≤-1.

54. The optical lens according to any one of claims 33 to 45, characterized in that, The focal length F1 of the first lens and the focal length F2 of the second lens satisfy the condition: |F1 / F2|≤0.

6.

55. The optical lens according to any one of claims 33 to 45, 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: -1.413≤R2 / R3≤-0.

2.

56. The optical lens according to any one of claims 33 to 45, characterized in that, The total focal length F of the optical lens, the radian value θ corresponding to the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.5≤F*θ / D≤1.

4.

57. The optical lens according to any one of claims 33 to 45, characterized in that, The focal length F of the optical lens and the focal length F6 of the sixth lens satisfy the following condition: F6 / F≤7.

58. The optical lens according to any one of claims 33 to 45, characterized in that, The center thickness d1 of the first lens and the total focal length F of the optical lens satisfy the following condition: 0.25≤d1 / F≤0.

6.

59. The optical lens according to any one of claims 33 to 45, characterized in that, The total focal length F of the optical lens, the radius of curvature R3 of the first side of the second lens, and the radius of curvature R4 of the second side of the second lens satisfy the following relationship: |F / R3|+|F / R4|≤3.

60. The optical lens according to any one of claims 33 to 45, characterized in that, The radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy the following condition: 0.1≤|R6| / |R5|≤2.

5.

61. The optical lens according to any one of claims 33 to 45, characterized in that, 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: 1 ≤ H / F ≤ 3.

4.

62. The optical lens according to any one of claims 33 to 45, characterized in that, The focal length F45 of the cemented doublet formed by the fourth lens and the fifth lens satisfies the following relationship with the total focal length F of the optical lens: -30≤F45 / F≤30.

63. The optical lens according to any one of claims 33 to 45, 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 optical total 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 of the optical lens, satisfy the following condition: 0.01≤BFL / TTL≤0.

185.

64. The optical lens according to any one of claims 33 to 45, characterized in that, The center thickness d6 of the third lens and the center thickness d3 of the second lens satisfy the following condition: 0.1≤d6 / d3≤3.

5.

65. The optical lens according to any one of claims 33 to 45, characterized in that, The optical lens satisfies at least one of the following conditions: 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 surface 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: 0.012≤TTL / H / FOV≤0.

015. 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 surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following: 0.682≤TTL / H / θ≤0.835; 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 of the optical lens, the total focal length F of the optical lens and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following: 1.770≤TTL / (F*θ)≤2.341; The maximum aperture D 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 corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.368≤D / H / θ≤0.523; The maximum aperture D 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: 0.663≤D / H / F≤1. The maximum field of view (FOV) of the optical lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 14.137≤FOV / TTL≤17.

608. The focal length F3 of the third lens, the distance Dst from the aperture stop to the first side of the first lens, and the total focal length F of the optical lens satisfy the following condition: 5.917≤F3*Dst / F≤7.

464. The focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: -21.626 ≤ F2 / F ≤ -5.071; The focal length F1 of the first lens and the focal length F2 of the second lens satisfy the following condition: 0.090 ≤ |F1 / F2| ≤ 0.367; 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: -0.916≤R2 / R3≤-0.735; The total focal length F of the optical lens, the radian value θ corresponding to the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following: 0.699≤F*θ / D≤1.049; The focal length F of the entire optical lens and the focal length F6 of the sixth lens satisfy the following condition: 4.396≤F6 / F≤6.056; The center thickness d1 of the first lens and the total focal length F of the optical lens satisfy the following relationship: 0.28 ≤ d1 / F ≤ 0.510; The total focal length F of the optical lens, the radius of curvature R3 of the first side of the second lens, and the radius of curvature R4 of the second side of the second lens satisfy the following condition: 0.908≤|F / R3|+|F / R4|≤3; The radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy the following condition: 0.490≤|R6| / |R5|≤2.5; 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: 1.8 ≤ H / F ≤ 2.850; The focal length F45 of the cemented doublet lens composed of the fourth lens and the fifth lens satisfies the following relationship with the total focal length F of the optical lens: -4.821≤F45 / F≤24; 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 optical total 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 of the optical lens, satisfy the following condition: 0.144≤BFL / TTL≤0.

172. The center thickness d6 of the third lens and the center thickness d3 of the second lens satisfy the following condition: 0.4 ≤ d6 / d3 ≤ 1.

275.

66. The optical lens according to any one of claims 33 to 45, characterized in that, The optical lens satisfies at least one of the following conditions: 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 surface 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: 0.012≤TTL / H / FOV≤0.

013. 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 surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.682≤TTL / H / θ≤0.

750. 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 of the optical lens, the total focal length F of the optical lens and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following: 1.770≤TTL / (F*θ)≤2.099; The maximum aperture D 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 corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.368≤D / H / θ≤0.405; The maximum aperture D 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: 0.663≤D / H / F≤0.783; The maximum field of view (FOV) of the optical lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 15.921≤FOV / TTL≤17.

608. The focal length F3 of the third lens, the distance Dst from the aperture stop to the first side of the first lens, and the total focal length F of the optical lens satisfy the following condition: 5.917≤F3*Dst / F≤7.212; The focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: -5.696 ≤ F2 / F ≤ -5.071; The focal length F1 of the first lens and the focal length F2 of the second lens satisfy the following condition: 0.347 ≤ |F1 / F2| ≤ 0.367; 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: -0.916≤R2 / R3≤-0.768; The total focal length F of the optical lens, the radian value θ corresponding to the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following: 0.883≤F*θ / D≤1.

049. The focal length F of the entire optical lens and the focal length F6 of the sixth lens satisfy the following condition: 4.888≤F6 / F≤6.056; The center thickness d1 of the first lens and the total focal length F of the optical lens satisfy the following relationship: 0.28 ≤ d1 / F ≤ 0.378; The total focal length F of the optical lens, the radius of curvature R3 of the first side of the second lens, and the radius of curvature R4 of the second side of the second lens satisfy the following condition: 0.908≤|F / R3|+|F / R4|≤1.140; The radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy the following condition: 0.700≤|R6| / |R5|≤1.204; 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: 2.594 ≤ H / F ≤ 2.798; The focal length F45 of the cemented doublet lens composed of the fourth lens and the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 11.028≤F45 / F≤22.603; 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 optical total 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 of the optical lens, satisfy the following condition: 0.144≤BFL / TTL≤0.

163. The center thickness d6 of the third lens and the center thickness d3 of the second lens satisfy the following condition: 0.778 ≤ d6 / d3 ≤ 0.

812.

67. An electronic device, characterized in that, It includes an optical lens according to any one of claims 1 to 66 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

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