Optical lens and electronic device with same

Abstract

The application provides an optical lens and an electronic device with the same, wherein the first lens has negative optical power, the first side of the first lens is a convex surface, and the second side of the first lens is a concave surface; the second lens has negative optical power, and the second side of the second lens is a concave surface; the first side of the third lens is a concave surface, and the second side of the third lens is a convex surface; the first side of the fourth lens is a concave surface, and the second side of the fourth lens is a convex surface; the fifth lens has positive optical power, and the first side and the second side of the fifth lens are both convex surfaces; the sixth lens has positive optical power, and the second side of the sixth lens is a convex surface; the seventh lens has positive optical power, and the first side of the seventh lens is a convex surface; the eighth lens has positive optical power, the first side of the eighth lens is a convex surface, and the second side of the eighth lens is a concave surface. The application solves at least one problem in the prior art, such as too large FNO of the optical lens, poor matching with a chip, narrow application waveband, and large edge field distortion.

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 having the same. Background Technology

[0002] With technological advancements and increasing application demands, optical lenses are finding wider and wider application in many devices, leading to higher user requirements. Existing optical lenses with excessively large field-of-view (FNO) result in limited light intake. Larger CRA (Covered Radius) lenses place higher demands on the chip, hindering their application in more devices. Wide-field-of-view lenses typically exhibit significant distortion, leading to poor image quality at the edges of the field of view. With the rapid development of automotive driver assistance systems, optical lenses are increasingly used in automobiles, highlighting the need for smaller FNO, lower distortion, and wider wavelengths. For some specialized applications, excessively large FNO affects light intake, limiting the lens's ranging capability. LiDAR lenses employ a transceiver design, using the same lens for both the transmitter and receiver; lenses with larger CRAs place higher demands on the chip, hindering applications in specialized lenses like LiDAR. Wide-field-of-view lenses suffer from significant edge distortion, resulting in low detection accuracy. Conventional radar lenses operate in the 940-960nm wavelength range, a narrow band that limits their versatility.

[0003] In other words, existing optical lenses suffer from at least one of the following problems: excessive FNO, poor chip matching, narrow application band, and large edge field of view distortion. Summary of the Invention

[0004] The main objective of this invention is to provide an optical lens and an electronic device having the same, so as to solve at least one of the following problems in the prior art: excessive FNO, poor matching with the chip, narrow application band, and large edge field of view distortion.

[0005] To achieve the above objectives, according to one aspect of the present invention, an optical lens is provided, comprising: a first lens having negative optical power, a first side surface of the first lens being convex, and a second side surface of the first lens being concave; a second lens having negative optical power, and a second side surface of the second lens being concave; a third lens having optical power, and a first side surface of the third lens being concave, and a second side surface of the third lens being convex; a fourth lens having optical power, and a first side surface of the fourth lens being concave, and a second side surface of the fourth lens being convex; a fifth lens having positive optical power, and a first side surface of the fifth lens being convex, and a second side surface of the fifth lens being convex; a sixth lens having positive optical power, and a second side surface of the sixth lens being convex; a seventh lens having positive optical power, and a first side surface of the seventh lens being convex; and an eighth lens having positive optical power, and a first side surface of the eighth lens being convex, and a second side surface of the eighth lens being concave.

[0006] Furthermore, the first side surface of the second lens is convex.

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

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

[0009] Furthermore, the third lens has positive optical power.

[0010] Furthermore, the fourth lens has positive optical power.

[0011] Furthermore, the fourth lens has negative optical power.

[0012] Furthermore, the first side surface of the sixth lens is convex.

[0013] Furthermore, the first side surface of the sixth lens is concave.

[0014] Furthermore, the second side surface of the seventh lens is concave.

[0015] Furthermore, the second side surface of the seventh lens is convex.

[0016] Furthermore, both the fifth and eighth lenses are aspherical lenses.

[0017] Furthermore, the first side surface of the fifth lens has a recurved point.

[0018] Furthermore, the first side surface of the fifth lens and the first side surface of the eighth lens have inflection points.

[0019] Furthermore, the first side surface of the fifth lens, the first side surface of the eighth lens, and the second side surface of the eighth lens have inflection points.

[0020] Furthermore, the optical lens also includes an aperture stop, which is located between the fourth lens and the fifth lens.

[0021] Furthermore, the total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: F / ENPD≤1.5.

[0022] Furthermore, the total focal length F of the optical lens and the total optical length TTL of the optical lens satisfy the following condition: TTL / F≤20.

[0023] Furthermore, the total optical length (TTL) 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.

[0024] Furthermore, the optical back focal length (BFL) and the optical total length (TTL) of the optical lens satisfy the following condition: BFL / TTL ≥ 0.06.

[0025] 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 maximum field of view FOV of the optical lens satisfy the following condition: D / H / FOV≤0.05.

[0026] Furthermore, the total focal length F of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following condition: (FOV*F) / H≤70.

[0027] Furthermore, the Sg value sag7 corresponding to the maximum light-transmitting aperture of the first side of the fourth lens and the Sg value sag8 corresponding to the maximum light-transmitting aperture of the second side of the fourth lens satisfy the following condition: 0.2≤sag7 / sag8≤1.6.

[0028] Furthermore, the Sg value sag1 corresponding to the maximum light-transmitting aperture of the first side of the first lens and the Sg value sag2 corresponding to the maximum light-transmitting aperture of the second side of the first lens satisfy the following condition: 0.3≤sag1 / sag2≤1.6.

[0029] Furthermore, the radius of curvature R4 of the second side surface of the second lens and the radius of curvature R5 of the first side surface of the third lens satisfy the following condition: R4 / R5≤-0.01.

[0030] Furthermore, the radius of curvature R2 of the second side surface of the first lens and the radius of curvature R7 of the first side surface of the fourth lens satisfy the following condition: R2 / R7≤-0.01.

[0031] 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 of the maximum field of view of the optical lens satisfy the following relationship: D / H / θ≤2.

[0032] 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 total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: F*θ / D≥0.1.

[0033] Furthermore, the total focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: F / H≥0.1.

[0034] 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 total focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: D / H / F≤1.5.

[0035] Furthermore, the focal length F1 of the first lens and the total focal length F of the optical lens satisfy the following condition: F1 / F≤-0.1.

[0036] Furthermore, the focal length F2 of the second lens and the total focal length F of the optical lens satisfy the following condition: F2 / F≤-0.1.

[0037] Furthermore, the focal length F4 of the fourth lens and the total focal length F of the optical lens satisfy the following condition: F4 / F≤15.

[0038] Furthermore, the focal length F1 of the first lens and the focal length F2 of the second lens satisfy the following condition: 0.3≤F1 / F2≤4.

[0039] Furthermore, the focal length F7 of the seventh lens and the focal length F8 of the eighth lens satisfy the following condition: 0.2≤F7 / F8≤1.5.

[0040] Furthermore, the combined focal length F5-8 of the fifth to eighth lenses and the overall focal length F of the optical lens satisfy the following condition: F5-8 / F≥0.1.

[0041] Furthermore, the Abbe number VD3 of the third lens and the Abbe number VD7 of the seventh lens satisfy the following condition: VD7 / VD3≥1.5.

[0042] According to another aspect of the present invention, an optical lens is provided, comprising: a first lens having negative optical power; a second lens having negative optical power; a third lens having optical power; a fourth lens having optical power; a fifth lens having positive optical power; a sixth lens having positive optical power; a seventh lens having positive optical power; and an eighth lens having positive optical power; wherein the combined focal length value F5-8 of the fifth to eighth lenses and the overall focal length value F of the optical lens satisfy the following condition: F5-8 / F≥0.1.

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

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

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

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

[0047] Furthermore, the third lens has positive optical power, the first side of the third lens is concave, and the second side of the third lens is convex.

[0048] Furthermore, the fourth lens has positive optical power, the first side of the fourth lens is concave, and the second side of the fourth lens is convex.

[0049] Furthermore, the fourth lens has negative optical power, the first side of the fourth lens is concave, and the second side of the fourth lens is convex.

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

[0051] Furthermore, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is also convex.

[0052] Furthermore, the first side surface of the sixth lens is concave, and the second side surface of the sixth lens is convex.

[0053] Furthermore, the first side surface of the seventh lens is convex, and the second side surface of the seventh lens is concave.

[0054] Furthermore, the first side surface of the seventh lens is convex, and the second side surface of the seventh lens is also convex.

[0055] Furthermore, the first side surface of the eighth lens is convex, and the second side surface of the eighth lens is concave.

[0056] Furthermore, both the fifth and eighth lenses are aspherical lenses.

[0057] Furthermore, the first side surface of the fifth lens has a recurved point.

[0058] Furthermore, the first side surface of the fifth lens and the first side surface of the eighth lens have inflection points.

[0059] Furthermore, the first side surface of the fifth lens, the first side surface of the eighth lens, and the second side surface of the eighth lens have inflection points.

[0060] Furthermore, the optical lens also includes an aperture stop, which is located between the fourth lens and the fifth lens.

[0061] Furthermore, the total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: F / ENPD≤1.5.

[0062] Furthermore, the total focal length F of the optical lens and the total optical length TTL of the optical lens satisfy the following condition: TTL / F≤20.

[0063] Furthermore, the total optical length (TTL) 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.

[0064] Furthermore, the optical back focal length (BFL) and the optical total length (TTL) of the optical lens satisfy the following condition: BFL / TTL ≥ 0.06.

[0065] 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 maximum field of view FOV of the optical lens satisfy the following condition: D / H / FOV≤0.05.

[0066] Furthermore, the total focal length F of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following condition: (FOV*F) / H≤70.

[0067] Furthermore, the Sg value sag7 corresponding to the maximum light-transmitting aperture of the first side of the fourth lens and the Sg value sag8 corresponding to the maximum light-transmitting aperture of the second side of the fourth lens satisfy the following condition: 0.2≤sag7 / sag8≤1.6.

[0068] Furthermore, the Sg value sag1 corresponding to the maximum light-transmitting aperture of the first side of the first lens and the Sg value sag2 corresponding to the maximum light-transmitting aperture of the second side of the first lens satisfy the following condition: 0.3≤sag1 / sag2≤1.6.

[0069] Furthermore, the radius of curvature R4 of the second side surface of the second lens and the radius of curvature R5 of the first side surface of the third lens satisfy the following condition: R4 / R5≤-0.01.

[0070] Furthermore, the radius of curvature R2 of the second side surface of the first lens and the radius of curvature R7 of the first side surface of the fourth lens satisfy the following condition: R2 / R7≤-0.01.

[0071] 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 of the maximum field of view of the optical lens satisfy the following relationship: D / H / θ≤2.

[0072] 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 total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: F*θ / D≥0.1.

[0073] Furthermore, the total focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: F / H≥0.1.

[0074] 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 total focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: D / H / F≤1.5.

[0075] Furthermore, the focal length F1 of the first lens and the total focal length F of the optical lens satisfy the following condition: F1 / F≤-0.1.

[0076] Furthermore, the focal length F2 of the second lens and the total focal length F of the optical lens satisfy the following condition: F2 / F≤-0.1.

[0077] Furthermore, the focal length F4 of the fourth lens and the total focal length F of the optical lens satisfy the following condition: F4 / F≤15.

[0078] Furthermore, the focal length F1 of the first lens and the focal length F2 of the second lens satisfy the following condition: 0.3≤F1 / F2≤4.

[0079] Furthermore, the focal length F7 of the seventh lens and the focal length F8 of the eighth lens satisfy the following condition: 0.2≤F7 / F8≤1.5.

[0080] Furthermore, the Abbe number VD3 of the third lens and the Abbe number VD7 of the seventh lens satisfy the following condition: VD7 / VD3≥1.5.

[0081] According to another aspect of the present invention, an electronic device is provided, comprising the aforementioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0082] The above technical solution sets the first lens to negative optical power, which has a diverging effect on light. Setting the first side of the first lens to be convex helps collect more light from a large field of view into the subsequent optical system, increasing light flux. Furthermore, the significant curvature of the first side of the first lens helps reduce distortion. Setting the second side of the first lens to be concave allows control over the direction of large-angle light rays from the edge of the first lens. Light rays exiting through the second side of the first lens provide a larger light-receiving surface for the subsequent optical system.

[0083] By setting the second lens to have negative optical power, the direction of light rays emitted from the first lens in different fields of view can be adjusted, which helps improve resolution. Setting the second side of the second lens to be concave allows for secondary divergence of light rays, reducing the angle between large-angle rays and the optical axis. Optionally, the first side of the second lens can be convex, which helps collect light rays from the front and appropriately diffuse them through the second side of the second lens into the rear optical system, resulting in a smoother transition of light path. Alternatively, the first side of the second lens can be set to be concave, which helps to appropriately diffuse the light rays, resulting in a smoother transition of light path and less light deflection, effectively reducing light energy loss and improving illumination at the edges of the field of view.

[0084] By setting the third lens to have negative optical power, with its first side being concave and its second side convex, it's beneficial to adjust the direction of light rays from different fields of view of the second lens, thus improving resolution. Setting the first side of the third lens to be concave allows for a smoother transition of light rays, reducing light loss and improving illumination at the edges of the field of view, while also reducing the sensitivity of the optical lens. Alternatively, the third lens can be set to have positive optical power, with its first side concave and second side convex. This configuration converges light rays, and the concave first side of the third lens, in conjunction with the concave second side of the second lens, also results in a smoother transition of light rays, reducing light loss and improving illumination at the edges of the field of view, while also reducing the sensitivity of the optical lens. Setting the second side of the third lens to be convex allows for more efficient convergence of light rays, reducing defocusing between different fields of view.

[0085] By setting the fourth lens to have positive optical power, with its first side being concave and its second side convex, this configuration facilitates light convergence, compresses the light collected at the front end, and reduces the aperture of the rear lens. It also effectively reduces the lens's distortion (CRA), making it more suitable for low-light environments. Furthermore, the surface shape of the fourth lens is symmetrical to that of the first lens, which helps reduce distortion. Alternatively, the fourth lens can be set to have negative optical power, with its first side concave and its second side convex. This configuration diverges the light, helping it to travel smoothly to the rear, reducing the lens's sensitivity. The convex second side of the fourth lens effectively reduces CRA, making it more suitable for low-light environments and effectively reducing ghosting caused by reflections from the image plane.

[0086] By setting the fifth lens to have positive optical power, and making the first side and the second side of the fifth lens convex, it is possible to further compress the light collected at the front end and reduce the aperture of the rear lens, while reducing the CRA of the optical lens, making it more suitable for use in low-light environments.

[0087] By setting the sixth lens to have positive optical power, and making both its first and second sides convex, it is beneficial to compress the light collected at the front end, achieving a small f-noise ratio (FNO), while effectively reducing the lens's chromatic aberration (CRA) and improving relative illumination. Alternatively, the sixth lens can be configured with a concave first side and a convex second side, which facilitates adjusting the light path from different fields of view of the front-end lens, compressing the light collected at the front end, achieving a small FNO, and effectively reducing the lens's CRA and improving relative illumination.

[0088] By setting the seventh lens to have positive optical power, with its first side being convex and its second side being concave, the light rays entering from the sixth lens are smoothly transmitted to the rear. The convex first side of the seventh lens facilitates light deflection, reducing the angle between peripheral rays and the optical axis, thus achieving a small CRA and improving illumination. Alternatively, the first and second sides of the seventh lens can also be set to be convex. This helps compress the light collected at the front end, deflecting the light along the optical axis to reduce the angle of incidence on the image plane, achieving a small FNO, while effectively reducing the CRA of the optical lens and improving relative illumination.

[0089] By setting the eighth lens to have positive optical power, with the first side of the eighth lens being convex and the second side being concave, that is, the eighth lens is a positive optical power meniscus lens with a gentle lens shape, which is conducive to light convergence and has little impact on the trajectory of the light rays emitted through the seventh lens. This further allows the light rays to transition as smoothly as possible, avoiding light energy loss caused by an excessive angle between the light rays and the chip's principal ray when they reach the image plane, thus achieving a small CRA (Current Radiation Amplitude). At the same time, it is beneficial to improve the illumination of the edge field of view, thus achieving a small FNO (Fear of No Light). Attached Figure Description

[0090] 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:

[0091] Figure 1 A cross-sectional view of an optical lens according to Example 1 of the present invention is shown;

[0092] Figure 2 A cross-sectional view of the optical lens of Example 2 of the present invention is shown;

[0093] Figure 3 A cross-sectional view of the optical lens of Example 3 of the present invention is shown;

[0094] Figure 4 A cross-sectional view of the optical lens of Example 4 of the present invention is shown;

[0095] Figure 5 A cross-sectional view of the optical lens of Example 5 of the present invention is shown;

[0096] Figure 6 A cross-sectional view of the optical lens of Example Six of the present invention is shown;

[0097] Figure 7 A cross-sectional view of the optical lens of Example Seven of the present invention is shown;

[0098] Figure 8 A cross-sectional view of the optical lens of Example 8 of the present invention is shown.

[0099] The above figures include the following reference numerals:

[0100] STO, aperture stop; L1, first lens; S1, first side surface of the first lens; S2, second side surface of the first lens; L2, second lens; S3, first side surface of the second lens; S4, second side surface of the second lens; L3, third lens; S5, first side surface of the third lens; S6, second side surface of the third lens; L4, fourth lens; S7, first side surface of the fourth lens; S8, 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;

[0101] L6, sixth lens; S11, first side surface of the sixth lens; S12, second side surface of the sixth lens; L7, seventh lens; S13, first side surface of the seventh lens; S14, second side surface of the seventh lens; L8, eighth lens; S15, first side surface of the eighth lens; S16, second side surface of the eighth lens; L9, filter; S17, first side surface of the filter; S18, second side surface of the filter; S19, first side surface of the protective glass; S20, second side surface of the protective glass; IMA, imaging plane. Detailed Implementation

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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 object side is called the first side surface of the lens, and the surface of each lens closest to the image 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 used by those knowledgeable 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.

[0108] This application generally protects ordinary optical lenses. In the attached drawings, the left side is the object side and the right side is the image side. That is, the first side is the object side and the second side is the image side.

[0109] In an exemplary embodiment, the optical lens provided in this application can be used, for example, as a vehicle-mounted lens. Light rays from the object side can form an image from the image side.

[0110] 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 in 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 from the image source side can be imaged on the imaging side. The imaging surface of the optical lens is the image source surface.

[0111] In order to solve at least one of the problems of existing optical lenses, such as excessive FNO, poor matching with the chip, narrow application band, and large edge field of view distortion, the present invention provides an optical lens and an electronic device having the same.

[0112] Example 1

[0113] like Figures 1 to 8As shown, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The first lens has negative optical power, a first side surface of the first lens is convex, and a second side surface of the first lens is concave. The second lens has negative optical power, and a second side surface of the second lens is concave. The third lens has optical power, a first side surface of the third lens is concave, and a second side surface of the third lens is convex. The fourth lens has optical power, a first side surface of the fourth lens is concave, and a second side surface of the fourth lens is convex. The fifth lens has positive optical power, a first side surface of the fifth lens is convex, and a second side surface of the fifth lens is convex. The sixth lens has positive optical power, a second side surface of the sixth lens is convex. The seventh lens has positive optical power, a first side surface of the seventh lens is convex. The eighth lens has positive optical power, a first side surface of the eighth lens is convex, and a second side surface of the eighth lens is concave.

[0114] By setting the first lens to negative optical power, it has a diverging effect on light. Setting the first side of the first lens to be convex helps collect more light from a large field of view into the subsequent optical system, increasing light flux. Furthermore, the greater curvature of the first side of the first lens helps reduce distortion. Setting the second side of the first lens to be concave allows control over the direction of large-angle light rays at the edge of the first lens. Light rays exiting through the second side of the first lens provide a larger light-receiving surface for the subsequent optical system.

[0115] By setting the second lens to have negative optical power, the direction of light rays emitted from the first lens at different fields of view can be adjusted, which helps to improve resolution. Setting the second side of the second lens to be concave allows for secondary divergence of light rays, reducing the angle between large-angle rays and the optical axis. Optionally, the first side of the second lens can be convex, which helps to collect front-end light rays and appropriately diffuse them through the second side of the second lens into the rear optical system, resulting in a smoother transition of light path.

[0116] Of course, the first side of the second lens can also be set to be concave, which is beneficial to properly diffuse the light, make the light path transition smoothly, and reduce the light deflection, which can effectively reduce light energy loss and improve the illumination of the edge field of view.

[0117] Optionally, the third lens has negative optical power, with a concave first side and a convex second side. This facilitates adjusting the direction of light rays from different fields of view of the second lens, thereby improving resolution. Setting the first side of the third lens to be concave allows it to match the concave surface of the second side of the second lens, resulting in a smoother light transition, reduced light energy loss, improved illumination at the edges of the field of view, and reduced sensitivity of the optical lens.

[0118] Alternatively, the third lens can be configured to have positive optical power, with its first side being concave and its second side being convex. This configuration converges light rays, and the concave first side of the third lens complements the concave second side of the second lens, resulting in a smoother light transition, reduced light loss, improved illumination at the edges of the field of view, and reduced lens sensitivity. Convex second side of the third lens further optimizes light convergence, minimizing defocusing between different fields of view.

[0119] Optionally, the fourth lens has positive optical power, with its first side surface being concave and its second side surface being convex. This arrangement facilitates light convergence, compresses the light collected at the front end, and reduces the aperture of the rear lens, while effectively reducing the CRA (Chip Amplitude Reduction) of the optical lens, making it more suitable for use in low-light environments. Furthermore, the surface shape of the fourth lens is symmetrical to that of the first lens, which helps reduce distortion.

[0120] Of course, the fourth lens can also be configured to have negative optical power, with its first side being concave and its second side being convex. This configuration has a light-diverging effect, helping the light to travel smoothly to the rear and reducing the sensitivity of the optical lens. The convex second side of the fourth lens can effectively reduce the CRA (Cryptographic Reflection Amplitude) of the optical lens, making it more suitable for use in low-light environments, while also effectively reducing ghosting caused by reflections from the image plane.

[0121] By setting the fifth lens to have positive optical power, and making the first side and the second side of the fifth lens convex, it is possible to further compress the light collected at the front end and reduce the aperture of the rear lens, while reducing the CRA of the optical lens, making it more suitable for use in low-light environments.

[0122] Optionally, the sixth lens has positive optical power, and the first side of the sixth lens is convex, and the second side of the sixth lens is convex, which is beneficial for compressing the light collected at the front end, achieving a small FNO, and at the same time effectively reducing the CRA of the optical lens, and improving relative illumination.

[0123] Of course, the sixth lens can also be configured to have positive optical power, with the first side of the sixth lens being concave and the second side being convex. This is beneficial for adjusting the light path from different fields of view of the front lens, compressing the light collected at the front, achieving a small FNO, and effectively reducing the CRA of the optical lens, thereby improving relative illumination.

[0124] Optionally, the seventh lens has positive optical power, a convex first side surface, and a concave second side surface. This helps the light rays from the sixth lens to travel smoothly to the rear. The convex first side surface of the seventh lens facilitates the deflection of light rays, reduces the angle between the peripheral rays and the optical axis, helps achieve a small CRA (Current Radiation Amplitude), and improves illumination.

[0125] Of course, the seventh lens can also have positive optical power, with both its first and second sides being convex. This helps compress the light collected at the front end, causing the light to bend towards the optical axis, thus reducing the angle at which the light is incident on the image plane, achieving a small FNO, and effectively reducing the CRA of the optical lens, thereby improving relative illumination.

[0126] By setting the eighth lens to have positive optical power, with its first side being convex and its second side being concave, the eighth lens is essentially a positive optical power meniscus lens with a gently sloping shape. This facilitates light convergence and minimizes changes to the trajectory of light rays exiting the seventh lens. Furthermore, it allows for a smoother transition of light rays, preventing energy loss due to excessive angles between the light rays reaching the image plane and the chip's principal ray, thus achieving a small CRA (Current Radiation Amplitude). Simultaneously, it improves the illumination at the edge of the field of view, achieving a small FNO (Front Noise).

[0127] In this embodiment, both the fifth and eighth lenses are aspherical lenses. Preferably, the fifth and eighth lenses are aspherical lenses, which is beneficial for further correcting field curvature, compressing distortion, reducing aberrations, and improving resolution.

[0128] Optionally, the first side of the fifth lens has a recurve point. The setting of the recurve point helps to correct field curvature, aberrations, and reduce the principal ray angle, thereby improving the image acquisition sensitivity and achieving higher energy collection.

[0129] It can also be set that the first side surface of the fifth lens and the first side surface of the eighth lens have inflection points.

[0130] Of course, it can also be set so that the first side of the fifth lens, the first side of the eighth lens, and the second side of the eighth lens all have inflection points.

[0131] In this embodiment, the optical lens also includes an aperture stop, which is located between the fourth lens and the fifth lens. This facilitates the effective focusing of light entering the optical lens, reduces the aperture of subsequent lenses, and also helps to achieve a small FNO (Flight Noise).

[0132] In this embodiment, the overall focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: F / ENPD ≤ 1.5. By limiting F / ENPD within a reasonable range, the optical lens can be controlled to have a small FNO, increasing the amount of light entering the lens, and a larger entrance pupil diameter can also be achieved, which helps to improve relative illumination. Preferably, F / ENPD ≤ 1.3.

[0133] In this embodiment, the overall focal length F of the optical lens and the total optical length TTL of the optical lens satisfy the following condition: TTL / F ≤ 20. By limiting TTL / F within a reasonable range, the length of the optical lens can be effectively limited, achieving lens miniaturization. Preferably, TTL / F ≤ 18.

[0134] In this embodiment, the total optical length (TTL) of the optical lens, the image height (H) corresponding to the maximum field of view (FOV) of the optical lens, and the maximum field of view (FOV) of the optical lens satisfy the following condition: TTL / H / FOV ≤ 0.1. By limiting TTL / H / FOV within a reasonable range, the length of the optical lens can be effectively limited under the same imaging plane and image height, which is beneficial for lens miniaturization. Preferably, TTL / H / FOV ≤ 0.07.

[0135] In this embodiment, the optical back focal length (BFL) and total optical length (TTL) of the optical lens satisfy the following ratio: BFL / TTL ≥ 0.06. By limiting BFL / TTL within a reasonable range, miniaturization is achieved while controlling the back focal length of the optical lens to be relatively long, which is beneficial for achieving a small CRA (Compact Reflection Area) and also facilitates module assembly. Preferably, BFL / TTL ≥ 0.08.

[0136] 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 maximum field of view (FOV) of the optical lens satisfy the following condition: D / H / FOV ≤ 0.05. By limiting D / H / FOV within a reasonable range, it is beneficial to control the front aperture to be small, thus achieving miniaturization. Preferably, D / H / FOV ≤ 0.035.

[0137] In this embodiment, the overall focal length F of the optical lens, the image height H corresponding to the maximum field of view H of the optical lens, and the maximum field of view (FOV) of the optical lens satisfy the following condition: (FOV*F) / H ≤ 70. By limiting (FOV*F) / H to a reasonable range, the optical lens has a shorter focal length for a given field of view, which is beneficial for achieving low distortion. Preferably, (FOV*F) / H ≤ 65.

[0138] In this embodiment, the Sg value sag7 corresponding to the maximum light-transmitting aperture of the first side of the fourth lens and the Sg value sag8 corresponding to the maximum light-transmitting aperture of the second side of the fourth lens satisfy the following condition: 0.2 ≤ sag7 / sag8 ≤ 1.6. By limiting sag7 / sag8 within a reasonable range, the sagitta of the first and second sides of the fourth lens are made similar, which is beneficial for smooth light transition and reduces the sensitivity of the optical lens. Preferably, 0.3 ≤ sag7 / sag8 ≤ 1.2.

[0139] In this embodiment, the Sg value sag1 corresponding to the maximum light-transmitting aperture of the first side of the first lens and the Sg value sag2 corresponding to the maximum light-transmitting aperture of the second side of the first lens satisfy the following condition: 0.3 ≤ sag1 / sag2 ≤ 1.6. By limiting sag1 / sag2 within a reasonable range, the sagitta of the first and second sides of the first lens are made similar, which is beneficial for smooth light transition and reduces the sensitivity of the optical lens. Preferably, 0.4 ≤ sag1 / sag2 ≤ 1.3.

[0140] In this embodiment, the radius of curvature R4 of the second side surface of the second lens and the radius of curvature R5 of the first side surface of the third lens satisfy the condition: R4 / R5 ≤ -0.01. By limiting R4 / R5 within a reasonable range, the second side surface of the second lens and the first side surface of the third lens are symmetrically distributed, thereby smoothing the light path, which is beneficial to improving the lens resolution and reducing distortion. Preferably, -2 ≤ R4 / R5 ≤ -0.1.

[0141] In this embodiment, the radius of curvature R2 of the second side surface of the first lens and the radius of curvature R7 of the first side surface of the fourth lens satisfy the condition: R2 / R7 ≤ -0.01. By limiting R2 / R7 within a reasonable range, the second side surface of the first lens and the first side surface of the fourth lens are symmetrically distributed and both are concave, resulting in a smooth light path, which is beneficial for improving lens resolution and reducing distortion. Preferably, -2 ≤ R2 / R7 ≤ -0.1.

[0142] 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 of the maximum field of view of the optical lens satisfy the following relationship: D / H / θ ≤ 2. By limiting D / H / θ within a reasonable range, the front aperture of the optical lens can be controlled to be relatively small, which is beneficial for miniaturization. Preferably, D / H / θ ≤ 1.8.

[0143] 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 overall focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: F*θ / D ≥ 0.1. By limiting F*θ / D within a reasonable range, the front aperture of the optical lens can be made smaller, reducing the size of the optical lens and facilitating miniaturization. Preferably, F*θ / D ≥ 0.2.

[0144] In this embodiment, the overall focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: F / H ≥ 0.1. By limiting F / H within a reasonable range, the overall focal length and image height of the optical lens can be controlled within a certain range, ensuring that the field of view and image height are matched, which is beneficial to improving resolution. Preferably, 0.2 ≤ F / H ≤ 0.6.

[0145] 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 overall focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: D / H / F ≤ 1.5. By limiting D / H / F within a reasonable range, under the condition that the overall focal length of the optical lens is fixed, the optical lens can be provided with the characteristics of a large target surface and a small aperture. Preferably, D / H / F ≤ 1.35.

[0146] In this embodiment, the focal length F1 of the first lens and the total focal length F of the optical lens satisfy the condition: F1 / F ≤ -0.1. By limiting F1 / F within a reasonable range, and ensuring that the focal length of the first lens is negative, the focal length of the first lens can be controlled. This facilitates smooth beam transition, reduces aberrations, and improves image quality while achieving light collection. Preferably, F1 / F ≤ -2.

[0147] In this embodiment, the focal length F2 of the second lens and the total focal length F of the optical lens satisfy the condition: F2 / F ≤ -0.1. By limiting F2 / F within a reasonable range, the focal length of the second lens can be reasonably allocated, controlling the light path between the first and third lenses, which helps to smooth the light transition, reduce light energy loss, reduce sensitivity, and improve image quality. Preferably, F2 / F ≤ -3.

[0148] In this embodiment, the focal length F4 of the fourth lens and the total focal length F of the optical lens satisfy the condition: F4 / F ≤ 15. By limiting F4 / F within a reasonable range, the light path between the third and fifth lenses can be controlled, which helps to smooth the light transition, reduce sensitivity, and improve image quality. Preferably, F4 / F ≤ 13.

[0149] In this embodiment, the focal length F1 of the first lens and the focal length F2 of the second lens satisfy the condition: 0.3 ≤ F1 / F2 ≤ 4. By limiting F1 / F2 within a reasonable range, the focal lengths of adjacent first and second lenses are made similar, which helps to smooth the light transition and improves image quality. Preferably, 0.5 ≤ F1 / F2 ≤ 3.6.

[0150] In this embodiment, the focal length F7 of the seventh lens and the focal length F8 of the eighth lens satisfy the condition: 0.2 ≤ F7 / F8 ≤ 1.5. By limiting F7 / F8 within a reasonable range, the focal lengths of adjacent seventh and eighth lenses are made similar, which helps to smooth the light transition and improves image quality. Preferably, 0.3 ≤ F7 / F8 ≤ 1.2.

[0151] In this embodiment, the combined focal length F5-8 of the fifth to eighth lenses and the overall focal length F of the optical lens satisfy the condition: F5-8 / F ≥ 0.1. By limiting F5-8 / F to a reasonable range, and ensuring that all five lenses have positive optical power, the light collected at the front end can be compressed, achieving a small FNO (focal length not specified), effectively reducing the system CRA (colour resistance). Simultaneously, the uniform focal length distribution of the five to eighth lenses facilitates smooth light transition and improves lens resolution. Preferably, F5-8 / F ≥ 1.

[0152] In this embodiment, the Abbe number VD3 of the third lens and the Abbe number VD7 of the seventh lens satisfy the condition: VD7 / VD3 ≥ 1.5. By limiting VD7 / VD3 within a reasonable range, the Abbe number of the seventh lens is made larger, which is beneficial for optimizing chromatic aberration, improving image quality over a wider wavelength range, and giving the optical lens a wider range of application wavelengths. Preferably, VD7 / VD3 ≥ 2.

[0153] Example 2

[0154] like Figures 1 to 8 As shown, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The first lens has negative optical power; the second lens has negative optical power; the third lens has optical power; the fourth lens has optical power; the fifth lens has positive optical power; the sixth lens has positive optical power; the seventh lens has positive optical power; and the eighth lens has positive optical power. The combined focal length F5-8 of the fifth to eighth lenses and the overall focal length F of the optical lens satisfy the following condition: F5-8 / F ≥ 0.1.

[0155] By setting the first lens to negative optical power, it has a diverging effect on light. By setting the second lens to negative optical power, the direction of light rays emitted from the first lens in different fields of view can be adjusted, which helps to improve resolution. Optionally, the third lens has negative optical power, which helps to further diffuse light and increase light flux. Of course, the third lens can also be set to positive optical power, which has a converging effect on light, making the light transition smooth and reducing light energy loss. Optionally, the fourth lens has positive optical power, which helps to converge light, compress the light collected at the front end and reduce the aperture of the rear lens. Of course, the fourth lens can also be set to negative optical power, which has a diverging effect on light, helping the light to be transmitted smoothly to the rear and reducing the sensitivity of the optical lens.

[0156] By setting the fifth lens to have positive optical power, the light collected at the front end can be further compressed, and the aperture of the rear lens can be reduced. Setting the sixth lens to have positive optical power helps to compress the light collected at the front end, achieving a small f-noise ratio (FNO), while effectively reducing the lens's focal length range (CRA). Setting the seventh lens to have positive optical power helps the light entering from the sixth lens to be smoothly transmitted to the rear. Setting the eighth lens to have positive optical power helps to compress the light collected at the front end, achieving a small FNO, while effectively reducing the lens's CRA and improving relative illumination. By limiting the F5-8 / F range to a reasonable range, and ensuring that all five lenses (fifth to eighth) have positive optical power, the light collected at the front end can be compressed, achieving a small FNO and effectively reducing the system's CRA. Furthermore, the uniform focal length distribution of the five to eighth lenses facilitates smooth light transition and improves lens resolution.

[0157] Preferably, the combined focal length value F5-8 of the fifth to eighth lenses and the overall focal length value F of the optical lens satisfy the following condition: F5-8 / F≥1.

[0158] By making the first side surface of the first lens convex, it is beneficial to collect more light rays with a large field of view into the subsequent optical system, thereby increasing the light flux. Furthermore, the greater curvature of the first side surface of the first lens helps to reduce distortion. Making the second side surface of the first lens concave allows control over the direction of large-angle light rays at the edge of the first lens. Light rays emitted through the second side surface of the first lens can provide a larger light-receiving surface for the subsequent optical system.

[0159] By making the second side surface of the second lens concave, light can be diverged a second time, reducing the angle between large-angle light rays and the optical axis. Optionally, the first side surface of the second lens is convex, which is beneficial for collecting light rays from the front end and appropriately diffusing them through the second side surface of the second lens into the rear optical system, resulting in a smooth transition of light path.

[0160] Of course, the first side of the second lens can also be set to be concave, which is beneficial to properly diffuse the light, make the light path transition smoothly, and reduce the light deflection, which can effectively reduce light energy loss and improve the illumination of the edge field of view.

[0161] Optionally, when the third lens has negative optical power, the first side surface of the third lens is concave, and the second side surface of the third lens is convex. Setting the first side surface of the third lens to be concave allows it to match the concave surface of the second side surface of the second lens, resulting in a smooth transition of light, reducing light energy loss, improving the illumination of the edge field of view, and reducing the sensitivity of the optical lens.

[0162] Optionally, when the third lens has positive optical power, its first side surface is concave and its second side surface is convex. Setting the first side surface of the third lens to be concave allows it to match the concave surface of the second side surface of the second lens, resulting in a smoother light transition, reduced light energy loss, improved illumination at the edges of the field of view, and reduced sensitivity of the optical lens. Setting the second side surface of the third lens to be convex allows for more efficient convergence of light rays, reducing defocusing between different fields of view.

[0163] Optionally, when the fourth lens has positive optical power, its first side surface is concave and its second side surface is convex. This arrangement helps to compress the light collected at the front end and reduce the aperture of the rear lens, while effectively reducing the CRA (Chip Amplitude Reduction) of the optical lens, making it more suitable for use in low-light environments. Furthermore, the surface shape of the fourth lens is symmetrical to that of the first lens, which helps to reduce distortion.

[0164] Of course, when the fourth lens has negative optical power, the first side of the fourth lens is concave, and the second side is convex. This helps the light to be transmitted smoothly to the rear, reducing the sensitivity of the optical lens. The convex second side of the fourth lens can effectively reduce the CRA (Cryptographic Reflection Amplitude) of the optical lens, making it more suitable for use in low-light environments, while also effectively reducing ghosting caused by reflections from the image plane.

[0165] By setting the first side of the fifth lens to be convex and the second side of the fifth lens to be convex, the light collected at the front end can be further compressed and the aperture of the rear lens can be reduced. At the same time, the CRA of the optical lens can be reduced, making it more suitable for use in low-light environments.

[0166] Optionally, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is convex. This is beneficial for compressing the light collected at the front end, achieving a small FNO, and at the same time effectively reducing the CRA of the optical lens and improving relative illumination.

[0167] Of course, the first side of the sixth lens can also be set to be concave and the second side of the sixth lens to be convex. This is beneficial for adjusting the light path from different fields of view of the front lens, compressing the light collected at the front, achieving a small FNO, and effectively reducing the CRA of the optical lens, thereby improving relative illumination.

[0168] Optionally, the first side surface of the seventh lens is convex, and the second side surface is concave. This helps the light rays entering from the sixth lens to travel smoothly to the rear. The convexity of the first side surface of the seventh lens facilitates the deflection of light rays, reduces the angle between the peripheral rays and the optical axis, helps achieve a smaller CRA (Current Radiation Amplitude), and improves illumination.

[0169] Of course, the first side of the seventh lens can also be convex, and the second side of the seventh lens can also be convex. This is beneficial for compressing the light collected at the front end, causing the light to bend towards the optical axis, thereby reducing the angle at which the light is incident on the image plane, achieving a small FNO, and effectively reducing the CRA of the optical lens, thus improving relative illumination.

[0170] By setting the first side of the eighth lens as a convex surface and the second side of the eighth lens as a concave surface, that is, the eighth lens is a positive focal power meniscus lens with a gentle lens shape, which is conducive to light convergence and has little impact on the trajectory of the light rays emitted through the seventh lens. This further allows the light rays to transition as smoothly as possible, avoiding light energy loss caused by an excessive angle between the light rays and the chip's principal ray when they reach the image plane, thus achieving a small CRA (Current Radiation Amplitude). At the same time, it is beneficial to improve the illumination of the edge field of view, thus achieving a small FNO (Fear of Noise).

[0171] In this embodiment, both the fifth and eighth lenses are aspherical lenses. The fifth lens is preferably an aspherical lens, which is beneficial for further correcting field curvature, compressing distortion, reducing aberrations, and improving resolution.

[0172] Optionally, the first side of the fifth lens has a recurve point. The setting of the recurve point helps to correct field curvature, aberrations, and reduce the principal ray angle, thereby improving the image acquisition sensitivity and achieving higher energy collection.

[0173] It can also be set that the first side surface of the fifth lens and the first side surface of the eighth lens have inflection points.

[0174] Of course, it can also be set so that the first side of the fifth lens, the first side of the eighth lens, and the second side of the eighth lens all have inflection points.

[0175] In this embodiment, the optical lens also includes an aperture stop, which is located between the fourth lens and the fifth lens. This facilitates the effective focusing of light entering the optical lens, reduces the aperture of subsequent lenses, and also helps to achieve a small FNO (Flight Noise).

[0176] In this embodiment, the overall focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: F / ENPD ≤ 1.5. By limiting F / ENPD within a reasonable range, the optical lens can be controlled to have a small FNO, increasing the amount of light entering the lens, and a larger entrance pupil diameter can also be achieved, which helps to improve relative illumination. Preferably, F / ENPD ≤ 1.3.

[0177] In this embodiment, the overall focal length F of the optical lens and the total optical length TTL of the optical lens satisfy the following condition: TTL / F ≤ 20. By limiting TTL / F within a reasonable range, the length of the optical lens can be effectively limited, achieving lens miniaturization. Preferably, TTL / F ≤ 18.

[0178] In this embodiment, the total optical length (TTL) of the optical lens, the image height (H) corresponding to the maximum field of view (FOV) of the optical lens, and the maximum field of view (FOV) of the optical lens satisfy the following condition: TTL / H / FOV ≤ 0.1. By limiting TTL / H / FOV within a reasonable range, the length of the optical lens can be effectively limited under the same imaging plane and image height, which is beneficial for lens miniaturization. Preferably, TTL / H / FOV ≤ 0.07.

[0179] In this embodiment, the optical back focal length (BFL) and total optical length (TTL) of the optical lens satisfy the following ratio: BFL / TTL ≥ 0.06. By limiting BFL / TTL within a reasonable range, miniaturization is achieved while controlling the back focal length of the optical lens to be relatively long, which is beneficial for achieving a small CRA (Compact Reflection Area) and also facilitates module assembly. Preferably, BFL / TTL ≥ 0.08.

[0180] 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 maximum field of view (FOV) of the optical lens satisfy the following condition: D / H / FOV ≤ 0.05. By limiting D / H / FOV within a reasonable range, it is beneficial to control the front aperture to be small, thus achieving miniaturization. Preferably, D / H / FOV ≤ 0.035.

[0181] In this embodiment, the overall focal length F of the optical lens, the image height H corresponding to the maximum field of view H of the optical lens, and the maximum field of view (FOV) of the optical lens satisfy the following condition: (FOV*F) / H ≤ 70. By limiting (FOV*F) / H to a reasonable range, the optical lens has a shorter focal length for a given field of view, which is beneficial for achieving low distortion. Preferably, (FOV*F) / H ≤ 65.

[0182] In this embodiment, the Sg value sag7 corresponding to the maximum light-transmitting aperture of the first side of the fourth lens and the Sg value sag8 corresponding to the maximum light-transmitting aperture of the second side of the fourth lens satisfy the following condition: 0.2 ≤ sag7 / sag8 ≤ 1.6. By limiting sag7 / sag8 within a reasonable range, the sagitta of the first and second sides of the fourth lens are made similar, which is beneficial for smooth light transition and reduces the sensitivity of the optical lens. Preferably, 0.3 ≤ sag7 / sag8 ≤ 1.2.

[0183] In this embodiment, the Sg value sag1 corresponding to the maximum light-transmitting aperture of the first side of the first lens and the Sg value sag2 corresponding to the maximum light-transmitting aperture of the second side of the first lens satisfy the following condition: 0.3 ≤ sag1 / sag2 ≤ 1.6. By limiting sag1 / sag2 within a reasonable range, the sagitta of the first and second sides of the first lens are made similar, which is beneficial for smooth light transition and reduces the sensitivity of the optical lens. Preferably, 0.4 ≤ sag1 / sag2 ≤ 1.3.

[0184] In this embodiment, the radius of curvature R4 of the second side surface of the second lens and the radius of curvature R5 of the first side surface of the third lens satisfy the condition: R4 / R5 ≤ -0.01. By limiting R4 / R5 within a reasonable range, the second side surface of the second lens and the first side surface of the third lens are symmetrically distributed, thereby smoothing the light path, which is beneficial to improving the lens resolution and reducing distortion. Preferably, -2 ≤ R4 / R5 ≤ -0.1.

[0185] In this embodiment, the radius of curvature R2 of the second side surface of the first lens and the radius of curvature R7 of the first side surface of the fourth lens satisfy the condition: R2 / R7 ≤ -0.01. By limiting R2 / R7 within a reasonable range, the second side surface of the first lens and the first side surface of the fourth lens are symmetrically distributed and both are concave, resulting in a smooth light path, which is beneficial for improving lens resolution and reducing distortion. Preferably, -2 ≤ R2 / R7 ≤ -0.1.

[0186] 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 of the maximum field of view of the optical lens satisfy the following relationship: D / H / θ ≤ 2. By limiting D / H / θ within a reasonable range, the front aperture of the optical lens can be controlled to be relatively small, which is beneficial for miniaturization. Preferably, D / H / θ ≤ 1.8.

[0187] 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 overall focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: F*θ / D ≥ 0.1. By limiting F*θ / D within a reasonable range, the front aperture of the optical lens can be made smaller, reducing the size of the optical lens and facilitating miniaturization. Preferably, F*θ / D ≥ 0.2.

[0188] In this embodiment, the overall focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: F / H ≥ 0.1. By limiting F / H within a reasonable range, the overall focal length and image height of the optical lens can be controlled within a certain range, ensuring that the field of view and image height are matched, which is beneficial to improving resolution. Preferably, 0.2 ≤ F / H ≤ 0.6.

[0189] 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 overall focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: D / H / F ≤ 1.5. By limiting D / H / F within a reasonable range, under the condition that the overall focal length of the optical lens is fixed, the optical lens can be provided with the characteristics of a large target surface and a small aperture. Preferably, D / H / F ≤ 1.35.

[0190] In this embodiment, the focal length F1 of the first lens and the total focal length F of the optical lens satisfy the condition: F1 / F ≤ -0.1. By limiting F1 / F within a reasonable range, and ensuring that the focal length of the first lens is negative, the focal length of the first lens can be controlled. This facilitates smooth beam transition, reduces aberrations, and improves image quality while achieving light collection. Preferably, F1 / F ≤ -2.

[0191] In this embodiment, the focal length F2 of the second lens and the total focal length F of the optical lens satisfy the condition: F2 / F ≤ -0.1. By limiting F2 / F within a reasonable range, the focal length of the second lens can be reasonably allocated, controlling the light path between the first and third lenses, which helps to smooth the light transition, reduce light energy loss, reduce sensitivity, and improve image quality. Preferably, F2 / F ≤ -3.

[0192] In this embodiment, the focal length F4 of the fourth lens and the total focal length F of the optical lens satisfy the condition: F4 / F ≤ 15. By limiting F4 / F within a reasonable range, the light path between the third and fifth lenses can be controlled, which helps to smooth the light transition, reduce sensitivity, and improve image quality. Preferably, F4 / F ≤ 13.

[0193] In this embodiment, the focal length F1 of the first lens and the focal length F2 of the second lens satisfy the condition: 0.3 ≤ F1 / F2 ≤ 4. By limiting F1 / F2 within a reasonable range, the focal lengths of adjacent first and second lenses are made similar, which helps to smooth the light transition and improves image quality. Preferably, 0.5 ≤ F1 / F2 ≤ 3.6.

[0194] In this embodiment, the focal length F7 of the seventh lens and the focal length F8 of the eighth lens satisfy the condition: 0.2 ≤ F7 / F8 ≤ 1.5. By limiting F7 / F8 within a reasonable range, the focal lengths of adjacent seventh and eighth lenses are made similar, which helps to smooth the light transition and improves image quality. Preferably, 0.3 ≤ F7 / F8 ≤ 1.2.

[0195] In this embodiment, the Abbe number VD3 of the third lens and the Abbe number VD7 of the seventh lens satisfy the condition: VD7 / VD3 ≥ 1.5. By limiting VD7 / VD3 within a reasonable range, the Abbe number of the seventh lens is made larger, which is beneficial for optimizing chromatic aberration, improving image quality over a wider wavelength range, and giving the optical lens a wider range of application wavelengths. Preferably, VD7 / VD3 ≥ 2.

[0196] It should be noted that the total optical length (TTL) of the optical lens is the distance from the first side of the first lens to the imaging plane of the optical lens, and the optical back focal length (BFL) is the distance from the second side of the last lens to the center of the imaging plane of the optical lens.

[0197] Optionally, the aforementioned optical lens may also include a filter for correcting color deviation and a protective glass for protecting the photosensitive element located on the imaging surface.

[0198] The optical lens in this application may employ multiple lenses, such as the eight lenses described above. In this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. An aspherical lens is characterized by a continuously changing curvature 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. Specifically, when the imaging quality of the optical lens is the primary concern, all eight lenses may be aspherical lenses.

[0199] In an exemplary embodiment, the first to eighth 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 interference with normal lens use. For example, an all-glass optical lens has a wider temperature range, maintaining stable optical performance within the range of -40°C to 105°C. Specifically, when resolution and reliability are of paramount importance, the first to eighth lenses can all be aspherical glass lenses. Of course, in applications with lower temperature stability requirements, the first to eighth 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 eighth lenses in the optical lens can also be made of a combination of plastic and glass.

[0200] This application also provides an electronic device, including the aforementioned optical lens and an imaging element for converting 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.

[0201] 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 an embodiment is described using eight lenses as an example, the optical lens is not limited to including eight lenses. The optical lens may include other numbers of lenses if desired.

[0202] 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.

[0203] Example 1

[0204] like Figure 1 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture stop STO, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, a protective glass, and an imaging surface IMA.

[0205] 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 convex, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 has negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has positive optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens has positive optical power. Its first side surface S15 is convex, and its second side surface S16 is concave. The filter L9 has a first side surface S17 and a second side surface S18. The protective glass has a first side surface S19 and a second side surface S20. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging plane IMA.

[0206] In this example, the focal length F of the optical lens is 2.7797mm, the total length TTL of the optical lens is 41.8072mm, and the maximum field of view FOV of the optical lens is 126.0276°.

[0207] In this example, the first side surface of the fifth lens and the first side surface of the eighth lens have inflection points.

[0208] Table 1 shows the basic structural parameters of the optical lens in Example 1, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0209]

[0210]

[0211] Table 1

[0212] In this example, both the fifth and eighth lenses are aspherical lenses. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0213]

[0214] Where x is the distance vector from the vertex of the aspherical surface along the optical axis at a height of h; 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; and A is the higher-order coefficient. Table 2 below shows the conic coefficient k and the higher-order coefficients A (4th-order coefficient), B (6th-order coefficient), C (8th-order coefficient), D (10th-order coefficient), E (12th-order coefficient), F (14th-order coefficient), and G (16th-order coefficient) that can be used for the aspherical lens surface in this example.

[0215] Surf k A B C D E F G 9 -8.0000 -3.6329E-05 -2.8286E-06 4.0964E-09 3.9073E-10 -1.8562E-12 -2.9235E-13 3.5502E-15 10 33.0000 2.4635E-05 -2.2753E-06 2.0726E-08 -1.2259E-10 -3.6972E-12 2.2041E-14 3.0147E-16 15 -9.0000 -1.4754E-04 -5.9472E-06 -1.7520E-07 2.2351E-09 1.1052E-10 3.0314E-13 -4.982E-14 16 141.0000 -1.6521E-04 -1.5334E-05 2.0575E-07 3.4617E-09 1.0490E-10 1.6043E-12 -2.9024E-13

[0216] Table 2

[0217] Example 2

[0218] like Figure 2 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture stop STO, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, a protective glass, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0219] 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 convex, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 has negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has positive optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens has positive optical power. Its first side surface S15 is convex, and its second side surface S16 is concave. The filter L9 has a first side surface S17 and a second side surface S18. The protective glass has a first side surface S19 and a second side surface S20. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging plane IMA.

[0220] In this example, the focal length F of the optical lens is 2.7800mm, the total length TTL of the optical lens is 41.5359mm, and the maximum field of view FOV of the optical lens is 126.0277°.

[0221] In this example, the first side surface of the fifth lens and the first side surface of the eighth lens have inflection points.

[0222] Table 3 shows the basic structural parameters of the optical lens in Example 2.

[0223] Surf Radius Thickness Nd Vd 1 18.0525 0.7930 1.80 46.57 2 6.5372 5.0510 3 177.6092 0.7930 1.56 70.42 4 7.3592 2.8106 5 -46.5685 3.1660 1.90 31.32 6 -21.5062 1.4308 7 -10.5690 2.9590 1.58 40.92 8 -13.6060 2.0276 STO Infinity 1.8225 9 23.2419 3.2682 1.59 61.12 10 -67.6609 -0.1616 11 15.7132 5.0802 1.52 64.21 12 -22.9838 0.9065 13 12.5575 3.2351 1.50 81.59 14 495.9888 0.7260 15 13.5539 2.9463 1.68 30.71 16 37.5047 1.5784 17 Infinity 1.0672 1.52 64.17 18 Infinity 0.8756 19 Infinity 0.4851 1.52 64.17 20 Infinity 0.6756 IMA / /

[0224] Table 3

[0225] Table 4 below shows the conic coefficient k and the coefficients of each higher-order term that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but is not limited to, the formula (1) in Example 1.

[0226]

[0227]

[0228] Table 4

[0229] Example 3

[0230] like Figure 3 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture stop STO, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, a protective glass, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0231] 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 concave. The third lens L3 has positive optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 has negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has positive optical power, its first side surface S13 is convex, and its second side surface S14 is convex. The eighth lens has positive optical power. Its first side surface S15 is convex, and its second side surface S16 is concave. The filter L9 has a first side surface S17 and a second side surface S18. The protective glass has a first side surface S19 and a second side surface S20. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging plane IMA.

[0232] In this example, the focal length F of the optical lens is 2.6095mm, the total length TTL of the optical lens is 42.6518mm, and the maximum field of view FOV of the optical lens is 126.0269°.

[0233] In this example, the first side surface of the fifth lens and the first side surface of the eighth lens have inflection points.

[0234] Table 5 shows the basic structural parameters of the optical lens in Example 3.

[0235]

[0236]

[0237] Table 5

[0238] Table 6 below shows the conic coefficient k and the coefficients of each higher-order term that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but is not limited to, the formula (1) in Example 1.

[0239] Surf k A B C D E F G 9 -6.0000 -3.6849E-05 -2.8324E-06 4.0125E-09 3.8892E-10 -1.8950E-12 -2.9318E-13 3.5321E-15 10 32.0000 2.2713E-05 -2.2729E-06 2.0765E-08 -1.2194E-10 -3.6864E-12 2.2222E-14 3.0452E-16 15 5.0000 -1.4621E-04 -5.8907E-06 -1.7526E-07 2.2342E-09 1.1051E-10 3.0314E-13 -4.9814E-14 16 48.0000 -1.6295E-04 -1.5321E-05 2.0600E-07 3.4656E-09 1.0493E-10 1.6032E-12 -2.9033E-13

[0240] Table 6

[0241] Example 4

[0242] like Figure 4As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture stop STO, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, a protective glass, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0243] 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 concave. The third lens L3 has positive optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 has negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has positive optical power, its first side surface S13 is convex, and its second side surface S14 is convex. The eighth lens has positive optical power. Its first side surface S15 is convex, and its second side surface S16 is concave. The filter L9 has a first side surface S17 and a second side surface S18. The protective glass has a first side surface S19 and a second side surface S20. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging plane IMA.

[0244] In this example, the focal length F of the optical lens is 2.6301mm, the total length TTL of the optical lens is 42.1705mm, and the maximum field of view FOV of the optical lens is 126.0000°.

[0245] In this example, the first side surface of the fifth lens and the first side surface of the eighth lens have inflection points.

[0246] Table 7 shows the basic structural parameters of the optical lens in Example 4.

[0247]

[0248]

[0249] Table 7

[0250] Table 8 below shows the conic coefficient k and the coefficients of each higher-order term that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but is not limited to, the formula (1) in Example 1.

[0251] Surf k A B C D E F G 9 -3.2499 -3.7841E-05 -2.7886E-06 3.9153E-09 3.7812E-10 -1.7505E-12 -2.7764E-13 3.3542E-15 10 25.3990 2.3396E-05 -2.2268E-06 2.0187E-08 -1.1856E-10 -3.5399E-12 2.1316E-14 2.9694E-16 15 -5.0701 -1.4579E-04 -5.7600E-06 -1.7032E-07 2.1566E-09 1.0568E-10 2.7683E-13 -4.7417E-14 16 41.2470 -1.6043E-04 -1.5176E-05 1.9725E-07 3.2993E-09 1.0039E-10 1.5454E-12 -2.7305E-13

[0252] Table 8

[0253] Example 5

[0254] like Figure 5 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture stop STO, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, a protective glass, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0255] 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 concave. The third lens L3 has positive optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 has negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has positive optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens has positive optical power. Its first side surface S15 is convex, and its second side surface S16 is concave. The filter L9 has a first side surface S17 and a second side surface S18. The protective glass has a first side surface S19 and a second side surface S20. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging plane IMA.

[0256] In this example, the focal length F of the optical lens is 2.8077mm, the total length TTL of the optical lens is 45.4855mm, and the maximum field of view FOV of the optical lens is 126.0301°.

[0257] In this example, the first side surface of the fifth lens, the first side surface of the eighth lens, and the second side surface of the eighth lens have inflection points.

[0258] Table 9 shows the basic structural parameters of the optical lens in Example 5.

[0259] Surf Radius Thickness Nd Vd 1 20.7146 2.2192 1.80 46.57 2 6.4540 5.4809 3 -76.3412 0.7107 1.49 70.42 4 8.4164 2.7071 5 -39.2805 2.9906 1.90 31.32 6 -20.4473 1.2719 7 -11.3804 2.9580 1.90 31.32 8 -14.1106 1.9611 STO Infinity 3.0269 9 23.6017 3.4571 1.59 61.12 10 -72.6537 0.0347 11 15.8300 6.4274 1.50 81.59 12 -23.2963 0.8327 13 11.8904 3.2033 1.50 81.59 14 139.9337 0.6971 15 13.6089 2.8059 1.68 30.71 16 38.1741 1.5923 17 Infinity 1.0766 1.52 64.17 18 Infinity 0.8806 19 Infinity 0.4894 1.52 64.17 20 Infinity 0.6617 IMA / /

[0260] Table 9

[0261] Table 10 below shows the conic coefficient k and the coefficients of each higher-order term that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but is not limited to, the formula (1) in Example 1.

[0262]

[0263]

[0264] Table 10

[0265] Example 6

[0266] like Figure 6 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture stop STO, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, a protective glass, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0267] 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 concave. The third lens L3 has positive optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 has negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has positive optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens has positive optical power. Its first side surface S15 is convex, and its second side surface S16 is concave. The filter L9 has a first side surface S17 and a second side surface S18. The protective glass has a first side surface S19 and a second side surface S20. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging plane IMA.

[0268] In this example, the focal length F of the optical lens is 2.8100mm, the total length TTL of the optical lens is 45.5205mm, and the maximum field of view FOV of the optical lens is 126.0301°.

[0269] In this example, the first side surface of the fifth lens, the first side surface of the eighth lens, and the second side surface of the eighth lens have inflection points.

[0270] Table 11 shows the basic structural parameters of the optical lens in Example 6.

[0271]

[0272]

[0273] Table 11

[0274] Table 12 below shows the conic coefficient k and the coefficients of each higher-order term that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but is not limited to, the formula (1) in Example 1.

[0275] Surf k A B C D E F G 9 -2.5559 -3.1354E-05 -2.6287E-06 4.7745E-09 3.6323E-10 -1.7575E-12 -2.6434E-13 3.0498E-15 10 23.1130 2.5055E-05 -2.1754E-06 1.9432E-08 -1.1323E-10 -3.3679E-12 1.8563E-14 2.1693E-16 15 -4.5574 -1.4285E-04 -5.5627E-06 -1.6260E-07 2.0995E-09 1.0064E-10 2.5968E-13 -4.4553E-14 16 85.5500 -1.9221E-04 -1.4959E-05 1.9107E-07 3.1998E-09 9.6997E-11 1.5414E-12 -2.4908E-13

[0276] Table 12

[0277] Example 7

[0278] like Figure 7 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture stop STO, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, a protective glass, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0279] 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 convex, and its second side surface S4 is concave. The third lens L3 has negative optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 has positive optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is concave, and its second side surface S12 is convex. The seventh lens L7 has positive optical power, its first side surface S13 is convex, and its second side surface S14 is convex. The eighth lens has positive optical power. Its first side surface S15 is convex, and its second side surface S16 is concave. The filter L9 has a first side surface S17 and a second side surface S18. The protective glass has a first side surface S19 and a second side surface S20. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging plane IMA.

[0280] In this example, the focal length F of the optical lens is 2.7695mm, the total length TTL of the optical lens is 40.2098mm, and the maximum field of view FOV of the optical lens is 126.0000°.

[0281] In this example, the first side of the fifth lens has a point of inflection.

[0282] Table 13 shows the basic structural parameters of the optical lens in Example 7.

[0283] Surf Radius Thickness Nd Vd 1 13.1953 2.3562 1.80 46.57 2 8.3070 2.9407 3 17.0415 0.4347 1.77 49.61 4 5.3647 5.4455 5 -7.4831 4.1512 1.85 23.79 6 -10.0820 0.2032 7 -30.5067 3.2795 1.85 23.79 8 -14.8076 1.2510 STO Infinity 1.1266 9 30.5630 2.5699 1.68 30.71 10 -56.4468 1.7559 11 -15.3787 2.7992 1.54 70.42 12 -10.0972 0.5379 13 10.3913 5.3671 1.62 63.41 14 -27.6183 0.1072 15 13.6934 1.8383 1.68 30.71 16 32.8004 1.5394 17 Infinity 1.1000 1.52 54.09 18 Infinity 0.9061 19 Infinity 0.5000 1.52 54.09 20 Infinity -0.0049 IMA / /

[0284] Table 13

[0285] Table 14 below shows the conic coefficient k and the coefficients of each higher-order term that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but is not limited to, the formula (1) in Example 1.

[0286] Surf k A B C D E F G 9 19.8470 -5.9869E-04 2.2921E-06 -8.7379E-07 2.4311E-08 -2.7328E-10 0.0000E+00 0.0000E+00 10 -150.1600 -3.5378E-04 -7.9946E-06 2.8659E-07 -8.4420E-09 1.1416E-10 0.0000E+00 0.0000E+00 15 -5.1603 -4.7843E-04 1.1417E-05 -1.1027E-06 8.1237E-08 -1.4090E-09 0.0000E+00 0.0000E+00 16 -72.1100 1.0280E-05 -2.1072E-05 3.6017E-06 -1.4043E-07 4.9786E-09 0.0000E+00 0.0000E+00

[0287] Table 14

[0288] Example 8

[0289] like Figure 8As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture stop STO, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, a protective glass, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0290] 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 convex, and its second side surface S4 is concave. The third lens L3 has negative optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 has positive optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is concave, and its second side surface S12 is convex. The seventh lens L7 has positive optical power, its first side surface S13 is convex, and its second side surface S14 is convex. The eighth lens has positive optical power. Its first side surface S15 is convex, and its second side surface S16 is concave. The filter L9 has a first side surface S17 and a second side surface S18. The protective glass has a first side surface S19 and a second side surface S20. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging plane IMA.

[0291] In this example, the focal length F of the optical lens is 2.7720mm, the total length TTL of the optical lens is 40.1259mm, and the maximum field of view FOV of the optical lens is 126.0000°.

[0292] In this example, the first side of the fifth lens has a point of inflection.

[0293] Table 15 shows the basic structural parameters of the optical lens in Example 8.

[0294] Surf Radius Thickness Nd Vd 1 13.1933 2.3304 1.80 46.57 2 8.3094 2.9516 3 16.5289 0.4174 1.77 49.61 4 5.3154 5.4267 5 -7.4847 4.1510 1.85 23.79 6 -10.0830 0.2018 7 -30.5439 3.2788 1.85 23.79 8 -14.8051 1.2201 STO Infinity 1.1265 9 30.5513 2.5504 1.68 30.71 10 -56.3078 1.7525 11 -15.3823 2.8007 1.54 70.42 12 -10.0952 0.5502 13 10.3893 5.3724 1.62 63.41 14 -27.6297 0.1092 15 13.6928 1.8400 1.68 30.71 16 32.8176 1.5394 17 Infinity 1.1000 1.52 54.09 18 Infinity 0.9071 19 Infinity 0.5000 1.52 54.09 20 Infinity -0.0087 IMA / /

[0295] Table 15

[0296] Table 16 below shows the conic coefficient k and the coefficients of each higher-order term that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but is not limited to, the formula (1) in Example 1.

[0297]

[0298]

[0299] Table 16 summarizes that Examples 1 to 8 satisfy the relationships shown in Table 17.

[0300] Conditional / Example 1 2 3 4 5 6 7 8 F / ENPD 0.7400 0.7400 0.7400 0.7400 0.7300 0.7300 0.8000 0.8000 TTL / F 15.0402 14.9410 16.3448 16.0338 16.2003 16.1995 14.5188 14.4754 TTL / H / FOV 0.0546 0.0536 0.0597 0.0582 0.0595 0.0594 0.0524 0.0523 BFL / TTL 0.1126 0.1127 0.1103 0.1119 0.1033 0.1037 0.1006 0.1008 D / H / FOV 0.0247 0.0244 0.0264 0.0259 0.0280 0.0279 0.0264 0.0264 (FOV*F) / H 57.6457 56.9927 57.9839 57.6265 58.3832 58.2475 57.3405 57.3263 sag7 / sag8 1.0863 1.1006 1.0715 1.0667 1.0279 1.0278 0.4622 0.4614 sag1 / sag2 0.5688 0.5698 0.5833 0.6046 0.6275 0.6277 1.1184 1.1139 R4 / R5 -0.1559 -0.1580 -0.1539 -0.1682 -0.2143 -0.2141 -0.7169 -0.7102 R2 / R7 -0.6145 -0.6185 -0.6114 -0.6018 -0.5671 -0.5671 -0.2723 -0.2720 D / H / θ 1.4157 1.3969 1.5142 1.4828 1.6021 1.5974 1.5141 1.5118 F*θ / D 0.3231 0.3237 0.3039 0.3084 0.2892 0.2893 0.3006 0.3009 F / H 0.4574 0.4522 0.4601 0.4574 0.4632 0.4622 0.4551 0.4550 D / H / F 1.1203 1.1053 1.2763 1.2398 1.2551 1.2504 1.2022 1.1993 F1 / F -4.8330 -4.8287 -5.2095 -5.2277 -4.5531 -4.5499 -13.0558 -13.0223 F2 / F -5.0523 -5.0349 -4.8153 -4.7772 -5.6088 -5.6051 -3.7946 -3.7939 F4 / F -50.2047 -46.3429 -53.6216 -55.7213 -48.3579 -48.3832 11.6397 11.6148 F1 / F2 0.9566 0.9591 1.0819 1.0943 0.8118 0.8117 3.4406 3.4325 F7 / F8 0.8597 0.8575 0.8305 0.8340 0.8599 0.8599 0.3837 0.3839 F5-8 / F 3.0075 3.0072 3.2044 3.1793 3.1378 3.1352 2.7622 2.7597 VD7 / VD3 2.6053 2.6053 2.6053 2.6053 2.6053 2.6053 2.6655 2.6655

[0301] Table 17

[0302] Table 18 provides the complete set of focal length values ​​F for the optical lenses of Examples 1 to 8, and the focal length values ​​F1 to F8 (unit: mm) for each lens.

[0303]

[0304]

[0305] Table 18

[0306] 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.

[0307] 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.

[0308] 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.

[0309] 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, include: A first lens having negative optical power, a first side surface of the first lens being convex, and a second side surface of the first lens being concave; The second lens has negative optical power and its second side surface is concave. The third lens has optical power, the first side of the third lens is concave, and the second side of the third lens is convex; The fourth lens has optical power, the first side of the fourth lens is concave, and the second side of the fourth lens is convex; The fifth lens has positive optical power, and the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is convex. The sixth lens has positive optical power, and the second side surface of the sixth lens is convex. The seventh lens has positive optical power, and the first side surface of the seventh lens is convex. The eighth lens has positive optical power, the first side surface of the eighth lens is convex, and the second side surface of the eighth lens is concave. The focal length F1 of the first lens and the focal length F2 of the second lens satisfy the following condition: 0.3≤F1 / F2≤4.

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

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

4. The optical lens according to claim 1, characterized in that, The third lens has negative optical power.

5. The optical lens according to claim 1, characterized in that, The third lens has positive optical power.

6. The optical lens according to claim 1, characterized in that, The fourth lens has positive optical power.

7. The optical lens according to claim 1, characterized in that, The fourth lens has negative optical power.

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

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

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

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

12. The optical lens according to claim 1, characterized in that, Both the fifth lens and the eighth lens are aspherical lenses.

13. The optical lens according to claim 1, characterized in that, The first side surface of the fifth lens has a point of inflection.

14. The optical lens according to claim 1, characterized in that, The first side surface of the fifth lens and the first side surface of the eighth lens have inflection points.

15. The optical lens according to claim 1, characterized in that, The first side surface of the fifth lens, the first side surface of the eighth lens, and the second side surface of the eighth lens have inflection points.

16. The optical lens according to claim 1, characterized in that, The optical lens also includes an aperture stop, which is located between the fourth lens and the fifth lens.

17. The optical lens according to any one of claims 1 to 16, characterized in that, The total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: 0.7300≤F / ENPD≤1.

5.

18. The optical lens according to any one of claims 1 to 16, characterized in that, The total focal length F of the optical lens and the total optical length TTL of the optical lens satisfy the following condition: 14.4754≤TTL / F≤20.

19. The optical lens according to any one of claims 1 to 16, characterized in that, The total optical length (TTL) of the optical lens, the image height (H) corresponding to the maximum field of view (FOV) of the optical lens, and the maximum field of view (FOV) of the optical lens satisfy the following condition: TTL / H / FOV≤0.

1.

20. The optical lens according to any one of claims 1 to 16, characterized in that, The optical back focal length (BFL) and the optical total length (TTL) of the optical lens satisfy the following condition: 0.1127 ≥ BFL / TTL ≥ 0.

06.

21. The optical lens according to any one of claims 1 to 16, 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 maximum field of view FOV of the optical lens satisfy the following condition: D / H / FOV≤0.

05.

22. The optical lens according to any one of claims 1 to 16, characterized in that, The total focal length F of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following condition: 56.9927≤(FOV*F) / H≤70.

23. The optical lens according to any one of claims 1 to 16, characterized in that, The Sg value sag7 corresponding to the maximum light-transmitting aperture of the first side of the fourth lens and the Sg value sag8 corresponding to the maximum light-transmitting aperture of the second side of the fourth lens satisfy the following condition: 0.2≤sag7 / sag8≤1.

6.

24. The optical lens according to any one of claims 1 to 16, characterized in that, The Sg value sag1 corresponding to the maximum light-transmitting aperture of the first side of the first lens and the Sg value sag2 corresponding to the maximum light-transmitting aperture of the second side of the first lens satisfy the following condition: 0.3≤sag1 / sag2≤1.

6.

25. The optical lens according to any one of claims 1 to 16, characterized in that, The radius of curvature R4 of the second side surface of the second lens and the radius of curvature R5 of the first side surface of the third lens satisfy the following condition: -2≤R4 / R5≤-0.

01.

26. The optical lens according to any one of claims 1 to 16, characterized in that, The radius of curvature R2 of the second side surface of the first lens and the radius of curvature R7 of the first side surface of the fourth lens satisfy the following condition: -2≤R2 / R7≤-0.

01.

27. The optical lens according to any one of claims 1 to 16, 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 of the maximum field of view of the optical lens satisfy the following condition: D / H / θ≤2.

28. The optical lens according to any one of claims 1 to 16, 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 total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: 0.3237≥F*θ / D≥0.

1.

29. The optical lens according to any one of claims 1 to 16, characterized in that, The total focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.6 ≥ F / H ≥ 0.

1.

30. The optical lens according to any one of claims 1 to 16, 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 total focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: D / H / F≤1.

5.

31. The optical lens according to any one of claims 1 to 16, characterized in that, The focal length F1 of the first lens and the total focal length F of the optical lens satisfy the following condition: -13.0558 ≤ F1 / F ≤ -0.

1.

32. The optical lens according to any one of claims 1 to 16, characterized in that, The focal length F2 of the second lens and the total focal length F of the optical lens satisfy the following condition: -5.6088≤F2 / F≤-0.

1.

33. The optical lens according to any one of claims 1 to 16, characterized in that, The focal length F4 of the fourth lens and the total focal length F of the optical lens satisfy the following condition: -55.7213≤F4 / F≤15.

34. The optical lens according to any one of claims 1 to 16, characterized in that, The focal length F7 of the seventh lens and the focal length F8 of the eighth lens satisfy the following condition: 0.2 ≤ F7 / F8 ≤ 1.

5.

35. The optical lens according to any one of claims 1 to 16, characterized in that, The combined focal length F5-8 of the fifth to eighth lenses and the overall focal length F of the optical lens satisfy the following condition: 3.2044≥F5-8 / F≥0.

1.

36. The optical lens according to any one of claims 1 to 16, characterized in that, The Abbe number VD3 of the third lens and the Abbe number VD7 of the seventh lens satisfy the following condition: 2.6655 ≥ VD7 / VD3 ≥ 1.

5.

37. The optical lens according to any one of claims 1 to 16, characterized in that, The following conditions must be met: 0.73≤F / ENPD≤1.3, 14.4754≤TTL / F≤18, TTL / H / FOV≤0.07, 0.1127≥BFL / TTL≥0.08, D / H / FOV≤0.035, 56.9927≤(FOV*F) / H≤65, 0.3≤sag7 / sag8≤1.2, 0.4≤sag1 / sag2≤1.3, -2≤R4 / R5≤-0.1, -2≤R2 / R7≤-0.1, D / H / θ≤1.8, 0.3237≥F*θ / D≥0.2 0.2≤F / H≤0.6, D / H / F≤1.35, -13.0558≤F1 / F≤-2, -5.6088≤F2 / F≤-3, -55.7213≤F4 / F≤13, 0.5≤F1 / F2≤3.6, 0.3≤F7 / F8≤1.2, 3.2044≥F5-8 / F≥1, 2.6655≥VD7 / VD3≥2, wherein the total focal length of the optical lens is F, the entrance pupil diameter of the optical lens is ENPD, the total optical length of the optical lens is TTL, and the image height corresponding to the maximum field of view of the optical lens is H. The maximum field of view of the optical lens is FOV, the optical back focal length of the optical lens is BFL, the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens is D, the Sg value corresponding to the maximum aperture of the first side of the fourth lens is sag7, the Sg value corresponding to the maximum aperture of the second side of the fourth lens is sag8, the Sg value corresponding to the maximum aperture of the first side of the first lens is sag1, the Sg value corresponding to the maximum aperture of the second side of the first lens is sag2, and the curvature half of the second side of the second lens is... The radius of curvature of the first side of the third lens is R4, the radius of curvature of the second side of the first lens is R2, the radius of curvature of the first side of the fourth lens is R7, the maximum field of view of the optical lens is θ in radians, the focal length of the first lens is F1, the focal length of the second lens is F2, the focal length of the fourth lens is F4, the focal length of the seventh lens is F7, the focal length of the eighth lens is F8, the combined focal length of the fifth to eighth lenses is F5-8, the Abbe number of the third lens is VD3, and the Abbe number of the seventh lens is VD7.

38. The optical lens according to any one of claims 1 to 16, characterized in that, The following conditions must be met: 0.73≤F / ENPD≤0.8, 14.4754≤TTL / F≤16.3448, 0.0523≤TTL / H / FOV≤0.0597, 0.1127≥BFL / TTL≥0.1006, 0.0244≤D / H / FOV≤0.0280, 56.9927≤(FOV*F) / H≤58.3832, 0.4614≤sag7 / sag8≤1.1006, 0.5688≤sag1 / sag2≤1.1184, -0.7169≤R4 / R5≤-0.1539, -0.6185≤R2 / R7≤-0.2720. 1.3969≤D / H / θ≤1.6021, 0.3237≥F*θ / D≥0.2892, 0.4522≤F / H≤0.4632, 1.1053≤D / H / F≤1.2763, -13.0558≤F1 / F≤-4.5499, -5.6088≤F2 / F≤-3.7939, -55.7213≤F4 / F≤11.6397, 0.8117≤F1 / F2≤3.4406, 0.3837≤F7 / F8≤0.8599, 3.2044≥F5-8 / F≥2.7597, 2.6655≥VD7 / VD3≥2.6053, wherein the optical lens is... The focal length of the optical lens is F, the entrance pupil diameter is ENPD, the total optical length is TTL, the image height corresponding to the maximum field of view is H, the maximum field of view is FOV, the optical back focal length is BFL, the maximum aperture of the first side of the first lens corresponding to the maximum field of view is D, the Sg value corresponding to the maximum aperture of the first side of the fourth lens is sag7, the Sg value corresponding to the maximum aperture of the second side of the fourth lens is sag8, the Sg value corresponding to the maximum aperture of the first side of the first lens is sag1, and the maximum aperture of the second side of the first lens is... The Sg value corresponding to the aperture is sag2, the radius of curvature of the second side of the second lens is R4, the radius of curvature of the first side of the third lens is R5, the radius of curvature of the second side of the first lens is R2, the radius of curvature of the first side of the fourth lens is R7, the radian value of the maximum field of view of the optical lens is θ, the focal length of the first lens is F1, the focal length of the second lens is F2, the focal length of the fourth lens is F4, the focal length of the seventh lens is F7, the focal length of the eighth lens is F8, the combined focal length of the fifth to eighth lenses is F5-8, the Abbe number of the third lens is VD3, and the Abbe number of the seventh lens is VD7.

39. An electronic device, characterized in that, It includes an optical lens according to any one of claims 1 to 38 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images