Optical lenses and electronic devices

Abstract

This invention provides an optical lens and an electronic device. The optical lens, from a first side to a second side, sequentially includes: a first lens with positive optical power, the first side of which is convex; a second lens with negative optical power, the first side of which is convex and the second side is concave; a third lens with negative optical power, the first side of which is concave; a fourth lens with positive optical power, the second side of which is convex; a fifth lens with positive optical power, the first side of which is convex and the second side is convex; and a sixth lens with positive optical power, the first side of which is convex. This invention solves the problem in existing optical lenses where it is difficult to simultaneously achieve a long back focal length, low distortion, small aperture, and small CRA (Cost Reduction Aspect Ratio).

Description

Technical Field

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

[0002] With the development of technology, the demand for optical lenses in daily life is increasing, and optical lenses are being used in more and more scenarios. For example, in the field of projection equipment, with the rapid updates and iterations of projection technology, the requirements for optical lenses used in projection technology are also increasing. In a projection system, the projection part and the illumination part are connected through optical path devices and display units, which have a certain volume. Therefore, the back focal length of the optical lens needs to meet certain requirements. However, the back focal length of some optical lenses in the current technology is relatively short and the CRA is relatively large, which makes it difficult to meet application requirements. At the same time, the current technology usually adopts a coaxial scheme, which requires the imaging plane to be tilted, resulting in greater distortion. In addition, due to the field of view requirements of some optical lenses, the lens aperture is increased, which leads to an increase in cost.

[0003] In other words, existing optical lenses suffer from the problem of not being able to simultaneously achieve a long back focal length, low distortion, small aperture, and small CRA. Summary of the Invention

[0004] The main objective of this invention is to provide an optical lens and electronic device to solve the problem that existing optical lenses cannot simultaneously achieve a long back focal length, small distortion, small aperture, and small CRA.

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

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

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

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

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

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

[0011] Furthermore, the first side surface of the fourth lens is concave.

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

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

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

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

[0016] Furthermore, the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, and the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, satisfy the following condition: BFL / TL≥0.46.

[0017] Furthermore, the focal length F34 of the cemented doublet formed by the third and fourth lenses satisfies the following relationship with the total focal length F of the optical lens: |F34 / F|≥9.04.

[0018] Furthermore, the air gap d5 between the aperture stop and the rear lens group satisfies the following condition with respect to the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens: d5 / TL≥0.057.

[0019] Furthermore, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: |(HF*θ) / (F*θ)|≤0.2.

[0020] 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|≥1.05.

[0021] Furthermore, the total focal length F of the optical lens, the radius of curvature R3 of the first side of the second lens, and the radius of curvature R4 of the second side of the second lens satisfy the following condition: 1.52≤|F / R3|+|F / R4|≤5.3.

[0022] Furthermore, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: D / H / FOV≤0.45.

[0023] Furthermore, the radius of curvature R2 of the second side surface of the first lens and the aperture D2 of the second side surface of the first lens satisfy the following condition: 2.5≤|R2 / D2|≤40.

[0024] Furthermore, the radius of curvature R9 of the first side of the fifth lens and the center thickness d9 of the fifth lens satisfy the following condition: 20≤R9 / d9≤220.

[0025] Furthermore, the light-transmitting aperture D12 of the second side of the sixth lens, the optical back focal length of the optical lens (i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane), and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: D12*BFL / H≥26.

[0026] Furthermore, the focal length F6 of the sixth lens satisfies the following condition with respect to the total focal length F of the optical lens: 0.6 ≤ F6 / F.

[0027] Furthermore, the focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: F2 / F≤-0.06.

[0028] Furthermore, the focal length F3 of the third lens satisfies the following relationship with the total focal length F of the optical lens: F3 / F≤-0.05.

[0029] Furthermore, the focal length F4 of the fourth lens satisfies the following relationship with the total focal length F of the optical lens: 0.38≤F4 / F≤2.2.

[0030] Furthermore, the focal length F5 of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 1.22≤F5 / F≤4.37.

[0031] According to another aspect of the present invention, an optical lens is provided, comprising, from a first side to a second side, the following in sequence: a first lens having positive optical power; a second lens having negative optical power; a third lens having negative optical power; a fourth lens having positive optical power; a fifth lens having positive optical power; and a sixth lens having positive optical power; wherein the focal length F34 of the cemented doublet formed by the third lens and the fourth lens satisfies the following relationship with the total focal length F of the optical lens: |F34 / F|≥9.04.

[0032] Furthermore, the first side surface of the first lens is convex, and the second side surface is concave.

[0033] Furthermore, the first side surface of the first lens is convex, and the second side surface is convex.

[0034] Furthermore, the first side surface of the second lens is convex, and the second side surface is concave.

[0035] Furthermore, the first side surface of the third lens is concave, and the second side surface is concave.

[0036] Furthermore, the first side of the third lens is concave, and the second side is convex.

[0037] Furthermore, the first side surface of the fourth lens is convex, and the second side surface is convex.

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

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

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

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

[0042] Furthermore, the third lens and the fourth lens are cemented together to form a cemented doublet lens.

[0043] Furthermore, the optical lens also includes an aperture stop, which is positioned between the second lens and the third lens.

[0044] Furthermore, the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, and the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, satisfy the following condition: BFL / TL≥0.46.

[0045] Furthermore, the air gap d5 between the aperture stop and the rear lens group satisfies the following condition with respect to the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens: d5 / TL≥0.057.

[0046] Furthermore, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: |(HF*θ) / (F*θ)|≤0.2.

[0047] 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|≥1.05.

[0048] Furthermore, the total focal length F of the optical lens, the radius of curvature R3 of the first side of the second lens, and the radius of curvature R4 of the second side of the second lens satisfy the following condition: 1.52≤|F / R3|+|F / R4|≤5.3.

[0049] 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 relationship: D / H / FOV≤0.45.

[0050] Furthermore, the radius of curvature R2 of the second side surface of the first lens and the aperture D2 of the second side surface of the first lens satisfy the following condition: 2.5≤|R2 / D2|≤40.

[0051] Furthermore, the radius of curvature R9 of the first side of the fifth lens and the center thickness d9 of the fifth lens satisfy the following condition: 20≤R9 / d9≤220.

[0052] Furthermore, the light-transmitting aperture D12 of the second side of the sixth lens, the optical back focal length of the optical lens (i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane), and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: D12*BFL / H≥26.

[0053] Furthermore, the focal length F6 of the sixth lens satisfies the following condition with respect to the total focal length F of the optical lens: 0.6 ≤ F6 / F.

[0054] Furthermore, the focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: F2 / F≤-0.06.

[0055] Furthermore, the focal length F3 of the third lens satisfies the following relationship with the total focal length F of the optical lens: F3 / F≤-0.05.

[0056] Furthermore, the focal length F4 of the fourth lens satisfies the following relationship with the total focal length F of the optical lens: 0.38≤F4 / F≤2.2.

[0057] Furthermore, the focal length F5 of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 1.22≤F5 / F≤4.37.

[0058] According to another aspect of the present invention, an electronic device is provided, including the aforementioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0059] According to the technical solution of the present invention, the optical lens sequentially includes a first lens with positive optical power, a second lens with negative optical power, a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, and a sixth lens with positive optical power from the first side to the second side. The first side of the first lens is convex; the first side of the second lens is convex and the second side is concave; the first side of the third lens is concave; the second side of the fourth lens is convex; the first side of the fifth lens is convex and the second side is convex; and the first side of the sixth lens is convex.

[0060] The first lens has positive optical power and converges light rays, effectively converging central and peripheral rays from various fields of view to increase system illumination. The first side of the first lens is convex, while the second side can be either convex or concave. When the second side is concave, the first lens takes on a meniscus shape, which facilitates the collection of light from a large field of view, increasing the light transmission of the optical lens, while also allowing diverging light to smoothly enter the rear, further smoothing the light path transition. When the second side is convex, combined with positive optical power, it converges light rays and also helps to reduce the height of the light entering the second lens, thus reducing the front aperture. The first lens preferably uses a high refractive index material, which facilitates light refraction, achieving a larger field of view, and also helps control the aperture of the front and rear lenses, enabling miniaturization.

[0061] The second lens has negative optical power. Its first side is convex, and its second side is concave. The negative optical power further diverges the light, adjusting the light refraction angle and reducing chromatic aberration. Simultaneously, the second lens's crescent shape facilitates the collection of light across a large field of view, increasing the lens's light transmission. The concave second side of the second lens causes a difference in optical path between the edge and center fields of view as the light passes through it, resulting in a longer optical path at the edge. This facilitates defocus correction of aberrations at the edge of the field of view and improves resolution.

[0062] The third lens has negative optical power, causing the light rays passing through its center and edges to diverge, which helps to enlarge the aperture and improve system illumination. The first side of the third lens is concave, while the second side can be either concave or convex. When the second side of the third lens is concave, its biconcave shape, combined with the subsequent biconvex fourth lens with positive optical power, corrects chromatic aberration and reduces system sensitivity. When the first side of the third lens is concave, the optical path difference between the edge and center fields of view increases rapidly, which helps to correct aberrations in the edge fields of view and improve image quality. When the second side of the third lens is convex, its shape becomes meniscus, which helps to collect light from a large field of view, increasing the light transmission of the optical lens. Furthermore, when cemented with the fourth lens, the light transition is smoother, further reducing lens sensitivity.

[0063] The fourth lens has positive optical power and converges light rays, effectively converging central and peripheral rays from various fields of view to increase system illumination. The second side of the fourth lens is convex, while the first side can be either convex or concave. When the first side of the fourth lens is convex, the light entering the fifth lens transitions smoothly, resulting in minimal aberrations and improving the resolving power of the optical system. When the first side of the fourth lens is concave, it has positive optical power and a meniscus shape, which helps collect light from a large field of view, increasing the light transmission of the optical lens. A fourth lens with positive optical power and a concave-convex shape, when paired with a preceding concave-convex lens of negative optical power, can smooth the refraction of different wavelengths to correct chromatic aberration. Simultaneously, the meniscus shape of the lens helps collect light from a large field of view, further increasing the light transmission of the optical lens.

[0064] The fifth lens has positive optical power, and both its first and second sides are convex. The positive optical power and the convexity of its first side compress the angle of the incident light, achieving a smooth transition and allowing diverging light to smoothly enter the rear, further smoothing the light path. This helps reduce the aperture of the rear lens and lowers system sensitivity.

[0065] The sixth lens has positive optical power and converges light rays, preventing energy loss caused by excessive angles between large field-of-view rays and the chip's principal ray when reaching the imaging surface, thus improving illumination at the edges of the field of view. The first side of the sixth lens is convex, while the second side can be either convex or concave. When the second side is convex, light rays entering this surface tend to be perpendicular, resulting in a smooth transition that reduces aberrations, improves resolution, and lowers lens sensitivity. When the second side is concave, the sixth lens has positive optical power and a meniscus shape, converging light rays and providing a smooth transition, which helps improve astigmatism and field curvature, enhancing the optical system's resolving power. The convex first side and concave second side of the sixth lens allow for a longer optical path before reaching the imaging surface, facilitating the achievement of a smaller CRA (Current Aspect Ratio).

[0066] This application employs six lenses. By optimizing the optical power and surface shape of each lens, the optical lens of this invention has at least one beneficial effect such as back focal length, small distortion, small aperture, and small CRA. Attached Figure Description

[0067] 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:

[0068] Figure 1 A schematic diagram of the structure of an optical lens of Example 1 of the present invention is shown;

[0069] Figure 2 A schematic diagram of the structure of the optical lens of Example 2 of the present invention is shown;

[0070] Figure 3 A schematic diagram of the structure of the optical lens of Example 3 of the present invention is shown;

[0071] Figure 4 A schematic diagram of the structure of the optical lens of Example 4 of the present invention is shown;

[0072] Figure 5 A schematic diagram of the structure of the optical lens of Example 5 of the present invention is shown;

[0073] Figure 6 A schematic diagram of the structure of the optical lens of Example Six of the present invention is shown;

[0074] Figure 7 A schematic diagram of the structure of the optical lens of Example Seven of the present invention is shown;

[0075] Figure 8 A schematic diagram of the structure of the optical lens of Example 8 of the present invention is shown.

[0076] The above figures include the following reference numerals:

[0077] L1, First lens; S1, First side surface of the first lens; S2, Second side surface of the first lens; L2, Second lens; S3, First side surface of the second lens; S4, Second side surface of the second lens; STO, Aperture stop; L3, Third lens; S6, First side surface of the third lens; S7, Second side surface of the third lens; L4, Fourth lens; 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; L6, Sixth lens; S11, First side surface of the sixth lens; S12, Second side surface of the sixth lens; S13, First side surface of the protective glass; S14, Second side surface of the protective glass; IMA, Imaging plane. Detailed Implementation

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the first side is called the first side surface of the lens, and the surface of each lens closest to the second side is called the second side surface of the lens. The surface shape in the paraxial region can be determined according to the judgment method commonly known in the field, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens database of optical software) to determine concavity or convexity. For the first side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the second side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0084] It should be noted that the left side of the optical lens is the first side, and the right side of the optical lens is the second side.

[0085] In an exemplary embodiment, the optical lens provided in this application can be used as a vehicle-mounted lens. For a vehicle-mounted lens, the left side is the object side, and the right side is the image side; the first side is also the object side, and the second side is also the image side. Light rays from the object side can form an image on the image side.

[0086] When the optical lens of this application is applied to a projection lens or a radar transmitting lens, the left side is the imaging side and the right side is the image source side. In an exemplary embodiment, the optical lens provided by this application can be used as, for example, a projection lens or a lidar transmitting lens. In this case, the image side of the optical lens can be the image source side, and the object side can be the imaging side. Light rays from the image source side can be imaged on the imaging side, and the imaging surface of the optical lens is the image source surface.

[0087] In order to solve the problem that existing optical lenses cannot simultaneously achieve a long back focal length, small distortion, small aperture, and small CRA, the main objective of this invention is to provide an optical lens and an electronic device.

[0088] Example 1

[0089] like Figures 1 to 8 As shown, the optical lens includes, from the first side to the second side, a first lens with positive optical power, a second lens with negative optical power, a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, and a sixth lens with positive optical power. The first side of the first lens is convex; the first side of the second lens is convex and the second side is concave; the first side of the third lens is concave; the second side of the fourth lens is convex; the first side of the fifth lens is convex and the second side is convex; and the first side of the sixth lens is convex.

[0090] The first lens has positive optical power and converges light rays, effectively converging central and peripheral rays from various fields of view to increase system illumination. The first side of the first lens is convex, while the second side can be either convex or concave. When the second side is concave, the first lens takes on a meniscus shape, which facilitates the collection of light from a large field of view, increasing the light transmission of the optical lens, while also allowing diverging light to smoothly enter the rear, further smoothing the light path transition. When the second side is convex, combined with positive optical power, it converges light rays and also helps to reduce the height of the light entering the second lens, thus reducing the front aperture. The first lens preferably uses a high refractive index material, which facilitates light refraction, achieving a larger field of view, and also helps control the aperture of the front and rear lenses, enabling miniaturization.

[0091] The second lens has negative optical power. Its first side is convex, and its second side is concave. The negative optical power further diverges the light, adjusting the light refraction angle and reducing chromatic aberration. Simultaneously, the second lens's crescent shape facilitates the collection of light across a large field of view, increasing the lens's light transmission. The concave second side of the second lens causes a difference in optical path between the edge and center fields of view as the light passes through it, resulting in a longer optical path at the edge. This facilitates defocus correction of aberrations at the edge of the field of view and improves resolution.

[0092] The third lens has negative optical power, causing the light rays passing through its center and edges to diverge, which helps to enlarge the aperture and improve system illumination. The first side of the third lens is concave, while the second side can be either concave or convex. When the second side of the third lens is concave, its biconcave shape, combined with the subsequent biconvex fourth lens with positive optical power, corrects chromatic aberration and reduces system sensitivity. When the first side of the third lens is concave, the optical path difference between the edge and center fields of view increases rapidly, which helps to correct aberrations in the edge fields of view and improve image quality. When the second side of the third lens is convex, its shape becomes meniscus, which helps to collect light from a large field of view, increasing the light transmission of the optical lens. Furthermore, when cemented with the fourth lens, the light transition is smoother, further reducing lens sensitivity.

[0093] The fourth lens has positive optical power and converges light rays, effectively converging central and peripheral rays from various fields of view to increase system illumination. The second side of the fourth lens is convex, while the first side can be either convex or concave. When the first side of the fourth lens is convex, the light entering the fifth lens transitions smoothly, resulting in minimal aberrations and improving the resolving power of the optical system. When the first side of the fourth lens is concave, it has positive optical power and a meniscus shape, which helps collect light from a large field of view, increasing the light transmission of the optical lens. A fourth lens with positive optical power and a concave-convex shape, when paired with a preceding concave-convex lens of negative optical power, can smooth the refraction of different wavelengths to correct chromatic aberration. Simultaneously, the meniscus shape of the lens helps collect light from a large field of view, further increasing the light transmission of the optical lens.

[0094] The fifth lens has positive optical power, and both its first and second sides are convex. The positive optical power and the convexity of its first side compress the angle of the incident light, achieving a smooth transition and allowing diverging light to smoothly enter the rear, further smoothing the light path. This helps reduce the aperture of the rear lens and lowers system sensitivity.

[0095] The sixth lens has positive optical power and converges light rays, preventing energy loss caused by excessive angles between large field-of-view rays and the chip's principal ray when reaching the imaging surface, thus improving illumination at the edges of the field of view. The first side of the sixth lens is convex, while the second side can be either convex or concave. When the second side is convex, light rays entering this surface tend to be perpendicular, resulting in a smooth transition that reduces aberrations, improves resolution, and lowers lens sensitivity. When the second side is concave, the sixth lens has positive optical power and a meniscus shape, converging light rays and providing a smooth transition, which helps improve astigmatism and field curvature, enhancing the optical system's resolving power. The convex first side and concave second side of the sixth lens allow for a longer optical path before reaching the imaging surface, facilitating the achievement of a smaller CRA (Current Aspect Ratio).

[0096] This application employs six lenses. By optimizing the optical power and surface shape of each lens, the optical lens of this invention has at least one beneficial effect such as back focal length, small distortion, small aperture, and small CRA.

[0097] In this embodiment, the second side of the first lens is concave. The first lens has a crescent shape, which is beneficial for collecting light from a large field of view, increasing the light transmission of the optical lens, and at the same time allowing diverging light to smoothly enter the rear, further smoothing the transition of light paths.

[0098] In this embodiment, the second side surface of the first lens is convex. When the second side surface of the first lens is convex, it is combined with positive optical power to converge the light rays and also helps to reduce the height of the light rays entering the second lens, which helps to reduce the front aperture.

[0099] In this embodiment, the second side surface of the third lens is concave. When the second side surface of the third lens is concave, the shape of the third lens is biconcave, which, when paired with the subsequent biconvex fourth lens of positive optical power, corrects chromatic aberration and reduces system sensitivity. The first side surface of the third lens is concave, which rapidly increases the optical path difference between the edge and center fields of view, which is beneficial for correcting aberrations in the edge fields of view and improving image quality.

[0100] In this embodiment, the second side surface of the third lens is convex. When the second side surface of the third lens is convex, the shape of the third lens becomes crescent-shaped, which is beneficial for collecting light from a large field of view and increasing the light transmission of the optical lens. At the same time, after being cemented with the fourth lens, the light transition is smoother, which helps to reduce lens sensitivity.

[0101] In this embodiment, the first side surface of the fourth lens is convex. When the first side surface of the fourth lens is convex, the light entering the fifth lens transitions smoothly, resulting in small aberrations, which is beneficial to improving the resolving power of the optical system.

[0102] In this embodiment, the first side surface of the fourth lens is concave. When the first side surface of the fourth lens is concave, the fourth lens has positive optical power and a crescent shape, which is beneficial for collecting light from a large field of view and increasing the light transmission of the optical lens. The fourth lens has positive optical power and a concave-convex shape, which, when combined with the concave-convex negative optical power lens in front, can smooth the refraction of different wavelengths to correct chromatic aberration. At the same time, the lens shape is crescent-shaped, which is beneficial for collecting light from a large field of view and increasing the light transmission of the optical lens.

[0103] In this embodiment, the second side surface of the sixth lens is convex. When the second side surface of the sixth lens is convex, light entering this surface tends to be incident perpendicularly, so the light entering this surface has a smooth transition, which is beneficial to reduce aberrations, improve resolution, and at the same time, help reduce lens sensitivity.

[0104] In this embodiment, the second side surface of the sixth lens is concave. When the second side surface of the sixth lens is concave, the sixth lens has positive optical power and the lens shape is meniscus, which has a converging effect on light rays, and the light rays transition smoothly, which is beneficial to improving astigmatism and field curvature in imaging and improving the resolving power of the optical system. The first side surface of the sixth lens is convex and the second side surface is concave, which allows light rays to have a longer optical path to reach the imaging surface after passing through the sixth lens, which is beneficial to achieving small CRA.

[0105] In this embodiment, the third and fourth lenses are cemented together to form a cemented doublet lens. The use of a cemented doublet lens effectively eliminates the influence of ghosting on the optical lens and corrects chromatic aberration, ensuring high resolution while eliminating ghosting. The third lens has negative optical power, which, combined with the subsequent positive optical power fourth lens, corrects chromatic aberration. The negative lens of the cemented doublet has a higher refractive index (relative to the positive lens), allowing light to converge effectively and smoothly at the final point, ensuring a stable light path to the imaging plane and reducing overall weight and cost. Simultaneously, the cemented doublet lens reduces light loss caused by reflections between the two lenses. The combination of high and low refractive indices facilitates rapid light transition, increases the aperture, and enhances light transmission, thus meeting night vision requirements. Furthermore, the use of a cemented doublet lens reduces the air gap between the two lenses, making the overall structure of the optical lens more compact and reducing tolerance sensitivity issues such as overall eccentricity of the lens unit during assembly.

[0106] In this embodiment, the optical lens also includes an aperture stop, which is disposed between the second lens and the third lens. By placing the aperture stop between the second lens and the third lens, the aperture stop is positioned in the middle, which facilitates the effective focusing of light entering the optical system, reduces the lens apertures at both ends of the optical system, adjusts the telecentricity of the optical lens, and reduces the assembly sensitivity of the system.

[0107] In this embodiment, the optical back focal length (BFL), i.e., the distance from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the following condition: BFL / TL ≥ 0.46, which is the distance from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens. Satisfying this condition allows for miniaturization while maintaining a longer back focal length, which is beneficial for module assembly. Preferably, BFL / TL ≥ 0.65.

[0108] In this embodiment, the focal length F34 of the cemented doublet formed by the third and fourth lenses satisfies the condition |F34 / F|≥9.04 with respect to the overall focal length F of the optical lens. By controlling the combined focal length of the cemented doublet, the trajectory of light entering the cemented doublet can be effectively controlled, reducing aberrations caused by large-angle light rays entering through the fourth lens, while also making the lens structure more compact, which is beneficial for miniaturization. Preferably, |F34 / F|≥9.2.

[0109] In this embodiment, the air gap d5 between the aperture stop and the rear lens group satisfies the following condition with respect to the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens to the center of the second side of the last lens: d5 / TL ≥ 0.057. By adjusting the position of the aperture stop, the focal lengths of the front and rear lens groups are reasonably allocated, and the distance between the aperture stop and the rear lens group is increased, making the light path of the rear group smoother, thereby increasing the rear focal length. Preferably, d5 / TL ≥ 0.088.

[0110] In this embodiment, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: |(HF*θ) / (F*θ)|≤0.2. Satisfying this condition ensures that, while keeping the field of view and image plane size constant, increasing the focal length of the optical lens enhances the imaging effect in the central region of the image plane. Preferably, |(HF*θ) / (F*θ)|≤0.09. The image height H includes the image height x_h in the x-direction and the image height y_h in the y-direction.

[0111] In this embodiment, the focal length F1 of the first lens and the total focal length F of the optical lens satisfy the condition: |F1 / F|≥1.05. By rationally allocating the focal length of the first lens, light enters the optical system smoothly, which is beneficial for light rays with a large field of view to enter the optical system, effectively correcting astigmatism to improve resolution and reduce distortion. Preferably, |F1 / F|≥2.1.

[0112] In this embodiment, the overall focal length F of the optical lens, the radius of curvature R3 of the first side surface of the second lens, and the radius of curvature R4 of the second side surface of the second lens satisfy the following condition: 1.52 ≤ |F / R3| + |F / R4| ≤ 5.3. Satisfying this condition helps control the surface curvature of the second lens, assists incident light in entering the optical system, and effectively corrects astigmatism to improve image quality. Preferably, 2.3 ≤ |F / R3| + |F / R4| ≤ 4.86.

[0113] 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 ≤ 0.45. Satisfying this condition allows for compression of the front and rear aperture sizes under the same FOV requirement, achieving a small aperture. Preferably, D / H / FOV ≤ 0.28. The image height H includes the image height x_h in the x-direction and the image height y_h in the y-direction. FOV and H are related, and the image height H corresponds to the field of view.

[0114] In this embodiment, the radius of curvature R2 of the second side surface of the first lens and the aperture D2 of the second side surface of the first lens satisfy the following ratio: 2.5 ≤ |R2 / D2| ≤ 40. By reasonably setting the ratio between the radius of curvature R2 of the second side surface of the first lens and the aperture D2 of the second side surface of the first lens, it is beneficial to reduce the height of the light entering the second lens, achieve a small aperture, and at the same time take into account the manufacturability of the lens. Preferably, 4.6 ≤ |R2 / D2| ≤ 32.

[0115] In this embodiment, the radius of curvature R9 of the first side surface of the fifth lens and the center thickness d9 of the fifth lens satisfy the condition: 20 ≤ R9 / d9 ≤ 220. Satisfying this condition, a reasonable ratio of radius of curvature to center thickness (a larger radius of curvature results in a smoother lens surface, and a smaller center thickness results in a thinner lens) is beneficial for reducing the overall size of the optical lens. Preferably, 30 ≤ R9 / d9 ≤ 200.

[0116] In this embodiment, the light-transmitting aperture D12 of the second side of the sixth lens, the optical back focal length of the optical lens (i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane), and the image height H corresponding to the maximum field of view of the optical lens satisfy the condition: D12*BFL / H≥26. Satisfying this condition ensures a long back focal length under the same imaging plane and image height, which is beneficial for achieving a small CRA (Cost Reduction Aspect Ratio). Preferably, D12*BFL / H≥32. This image height H includes the image height x_h in the x-direction and the image height y_h in the y-direction.

[0117] In this embodiment, the focal length F6 of the sixth lens satisfies the condition 0.6 ≤ F6 / F with the total focal length F of the optical lens. Satisfying this condition facilitates the rational allocation of the focal length of the sixth lens, and the crescent shape of the sixth lens allows light rays to have a longer optical path to the imaging plane, which is beneficial for achieving a small CRA (Current Radiation Amplitude). Preferably, 1.3 ≤ F6 / F.

[0118] 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 ≤ -0.06. Satisfying this condition facilitates the rational allocation of the focal length of the second lens, improves light collection, ensures sufficient light transmission, and enhances resolution. Preferably, F2 / F ≤ -0.5.

[0119] In this embodiment, the focal length F3 of the third lens and the total focal length F of the optical lens satisfy the condition: F3 / F ≤ -0.05. Satisfying this condition facilitates the rational allocation of the focal length of the third lens, helps to diverge the center and edge light rays passing through the third lens, facilitates the enlargement of the aperture, improves system illumination, and thus increases the light transmission of the optical lens. Preferably, F3 / F ≤ -0.1.

[0120] In this embodiment, the focal length F4 of the fourth lens satisfies the following relationship with the total focal length F of the optical lens: 0.38 ≤ F4 / F ≤ 2.2. Satisfying this condition facilitates the rational allocation of the fourth lens's focal length, helps correct chromatic aberration in various fields of view, and improves image quality. Preferably, 0.84 ≤ F4 / F ≤ 1.7.

[0121] In this embodiment, the focal length F5 of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 1.22 ≤ F5 / F ≤ 4.37. Satisfying this condition facilitates the rational allocation of the focal length of the fifth lens. Furthermore, its first side surface is convex, which can compress the angle of the incident light, achieving a smooth transition of light rays and allowing diverging light rays to smoothly enter the rear, further smoothing the light path transition. This helps to reduce the aperture of the rear lens and lowers system sensitivity. Preferably, 1.78 ≤ F5 / F ≤ 3.1.

[0122] Example 2

[0123] like Figures 1 to 8As shown, the optical lens, from the first side to the second side, sequentially includes: a first lens with positive optical power; a second lens with negative optical power; a third lens with negative optical power; a fourth lens with positive optical power; a fifth lens with positive optical power; and a sixth lens with positive optical power. The focal length F34 of the cemented doublet formed by the third and fourth lenses satisfies the following relationship with the overall focal length F of the optical lens: |F34 / F|≥9.04. By controlling the combined focal length of the cemented doublet, the trajectory of light entering the cemented doublet can be effectively controlled, reducing aberrations caused by large-angle light rays entering through the fourth lens, while also making the lens structure more compact, which is beneficial for miniaturization. Preferably, |F34 / F|≥9.2.

[0124] In this embodiment, the first side of the first lens is convex, and the second side is concave. The first lens has positive optical power and converges light, effectively converging the central and peripheral light rays from each field of view, thus increasing the system illumination. The first lens is crescent-shaped, which is beneficial for collecting light from a large field of view, increasing the light transmission of the optical lens, and at the same time allowing divergent light rays to smoothly enter the rear, further smoothing the transition of light paths.

[0125] In this embodiment, both the first and second sides of the first lens are convex. The first lens has positive optical power and converges light rays, effectively converging central and peripheral rays from various fields of view, thus increasing system illumination. The convexity of both sides, combined with the positive optical power, converges the light rays and also helps to reduce the height of the light entering the second lens, thereby reducing the front aperture. The first lens preferably uses a high refractive index material, which facilitates light refraction, achieving a larger field of view, and also allows for better control of the front and rear lens apertures, enabling miniaturization.

[0126] In this embodiment, the first side of the second lens is convex, and the second side is concave. The second lens has negative optical power, which further diverges the light, adjusts the light refraction angle, and reduces chromatic aberration. At the same time, the shape of the second lens is crescent-shaped, which is beneficial for collecting light from a large field of view and increasing the light transmission of the optical lens. The second side of the second lens is concave, which makes the optical path length of the light rays in the edge field of view different from that in the center field of view when passing through the second lens. This results in a longer optical path length in the edge field of view, which is beneficial for defocusing and correcting aberrations in the edge field of view, thereby improving resolution.

[0127] In this embodiment, the first side surface of the third lens is concave, and the second side surface is also concave. The third lens has negative optical power, which causes the light rays passing through the center and edges of the third lens to diverge, which is beneficial for expanding the aperture and improving the system illumination. The biconcave shape of the third lens, when paired with the subsequent biconvex fourth lens with positive optical power, corrects chromatic aberration and reduces system sensitivity. The concave shape of the first side surface of the third lens causes the optical path difference between the edge and center fields of view to increase rapidly, which is beneficial for correcting aberrations in the edge fields of view and improving image quality.

[0128] In this embodiment, the first side of the third lens is concave, and the second side is convex. The third lens has negative optical power, which causes the light rays passing through the center and edges of the third lens to diverge, which is beneficial to enlarge the aperture and improve the system illumination. When the second side of the third lens is convex, the shape of the third lens becomes crescent-shaped, which is beneficial to collect light rays with a large field of view and increase the light transmission of the optical lens. At the same time, after being cemented with the fourth lens, the light transition is more smooth, which is beneficial to reduce lens sensitivity.

[0129] In this embodiment, the first side surface of the fourth lens is convex, and the second side surface is convex. The fourth lens has positive optical power and converges light rays, effectively converging the central and peripheral rays of each field of view to increase the system illumination. When the first side surface of the fourth lens is convex, the light entering the fifth lens transitions smoothly, resulting in smaller aberrations, which is beneficial to improving the resolving power of the optical system.

[0130] In this embodiment, the first side of the fourth lens is concave, and the second side is convex. The fourth lens has positive optical power and converges light, effectively converging the central and peripheral rays from each field of view, thus increasing the system illumination. When the first side of the fourth lens is concave, the fourth lens has positive optical power and a crescent shape, which is beneficial for collecting light from a large field of view and increasing the light transmission of the optical lens. The combination of the positive optical power and the concave-convex shape of the fourth lens with the preceding concave-convex negative optical power lens can smooth the refraction of different wavelengths to correct chromatic aberration. At the same time, the crescent shape of the lens is beneficial for collecting light from a large field of view and increasing the light transmission of the optical lens.

[0131] In this embodiment, the first side surface of the fifth lens is convex, and the second side surface is convex. The fifth lens has positive optical power, and its first side surface is convex, which can compress the angle of the incident light to achieve a smooth transition of light, allowing diverging light to smoothly enter the rear, further smoothing the light path transition, which is beneficial to reducing the aperture of the rear lens and reducing system sensitivity.

[0132] In this embodiment, both the first and second sides of the sixth lens are convex. The sixth lens has positive optical power and converges light rays, preventing light energy loss caused by excessive angles between large field-of-view rays and the chip's principal ray when they reach the imaging surface, thus improving the illumination of the edge field of view. When the second side of the sixth lens is convex, light rays entering this surface tend to be perpendicularly incident, resulting in a smooth transition. This helps reduce aberrations, improve resolution, and also reduces lens sensitivity.

[0133] In this embodiment, the first side of the sixth lens is convex, and the second side is concave. The sixth lens has positive optical power and converges light rays, avoiding light energy loss caused by excessive angle between the large field-of-view light rays and the chip's principal ray when they reach the imaging surface, thus improving the illumination of the edge field of view. When the second side of the sixth lens is concave, the sixth lens has positive optical power, and the lens shape is meniscus, which converges light rays and ensures a smooth transition in light path, which helps to improve astigmatism and field curvature in imaging and enhance the resolving power of the optical system. The first side of the sixth lens is convex, and the second side is concave, which allows light rays to have a longer optical path to reach the imaging surface after passing through the sixth lens, which is beneficial for achieving a small CRA (Current Aspect Ratio).

[0134] This application employs six lenses. By optimizing the optical power and surface shape of each lens, the optical lens of this invention has at least one beneficial effect such as back focal length, small distortion, small aperture, and small CRA.

[0135] In this embodiment, the third and fourth lenses are cemented together to form a cemented doublet lens. The use of a cemented doublet lens effectively eliminates the influence of ghosting on the optical lens and corrects chromatic aberration, ensuring high resolution while eliminating ghosting. The third lens has negative optical power, which, combined with the subsequent positive optical power fourth lens, corrects chromatic aberration. The negative lens of the cemented doublet has a higher refractive index (relative to the positive lens), allowing light to converge effectively and smoothly at the final point, ensuring a stable light path to the imaging plane and reducing overall weight and cost. Simultaneously, the cemented doublet lens reduces light loss caused by reflections between the two lenses. The combination of high and low refractive indices facilitates rapid light transition, increases the aperture, and enhances light transmission, thus meeting night vision requirements. Furthermore, the use of a cemented doublet lens reduces the air gap between the two lenses, making the overall structure of the optical lens more compact and reducing tolerance sensitivity issues such as overall eccentricity of the lens unit during assembly.

[0136] In this embodiment, the optical lens also includes an aperture stop, which is disposed between the second lens and the third lens. By placing the aperture stop between the second lens and the third lens, the aperture stop is positioned in the middle, which facilitates the effective focusing of light entering the optical system, reduces the lens apertures at both ends of the optical system, adjusts the telecentricity of the optical lens, and reduces the assembly sensitivity of the system.

[0137] In this embodiment, the optical back focal length (BFL), i.e., the distance from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the following condition: BFL / TL ≥ 0.46, which is the distance from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens. Satisfying this condition allows for miniaturization while maintaining a longer back focal length, which is beneficial for module assembly. Preferably, BFL / TL ≥ 0.65.

[0138] In this embodiment, the air gap d5 between the aperture stop and the rear lens group satisfies the following condition with respect to the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens to the center of the second side of the last lens: d5 / TL ≥ 0.057. By adjusting the position of the aperture stop, the focal lengths of the front and rear lens groups are reasonably allocated, and the distance between the aperture stop and the rear lens group is increased, making the light path of the rear group smoother, thereby increasing the rear focal length. Preferably, d5 / TL ≥ 0.088.

[0139] In this embodiment, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: |(HF*θ) / (F*θ)|≤0.2. Satisfying this condition ensures that, while keeping the field of view and image plane size constant, increasing the focal length of the optical lens enhances the imaging effect in the central region of the image plane. Preferably, |(HF*θ) / (F*θ)|≤0.09. The image height H includes the image height x_h in the x-direction and the image height y_h in the y-direction.

[0140] In this embodiment, the focal length F1 of the first lens and the total focal length F of the optical lens satisfy the condition: |F1 / F|≥1.05. By rationally allocating the focal length of the first lens, light enters the optical system smoothly, which is beneficial for light rays with a large field of view to enter the optical system, effectively correcting astigmatism to improve resolution and reduce distortion. Preferably, |F1 / F|≥2.1.

[0141] In this embodiment, the overall focal length F of the optical lens, the radius of curvature R3 of the first side surface of the second lens, and the radius of curvature R4 of the second side surface of the second lens satisfy the following condition: 1.52 ≤ |F / R3| + |F / R4| ≤ 5.3. Satisfying this condition helps control the surface curvature of the second lens, assists incident light in entering the optical system, and effectively corrects astigmatism to improve image quality. Preferably, 2.3 ≤ |F / R3| + |F / R4| ≤ 4.86.

[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 maximum field of view (FOV) of the optical lens satisfy the following condition: D / H / FOV ≤ 0.45. Satisfying this condition allows for compression of the front and rear aperture sizes under the same FOV requirement, achieving a small aperture. Preferably, D / H / FOV ≤ 0.28. The image height H includes the image height x_h in the x-direction and the image height y_h in the y-direction. FOV and H are related, and the image height H corresponds to the field of view.

[0143] In this embodiment, the radius of curvature R2 of the second side surface of the first lens and the aperture D2 of the second side surface of the first lens satisfy the following ratio: 2.5 ≤ |R2 / D2| ≤ 40. By reasonably setting the ratio between the radius of curvature R2 of the second side surface of the first lens and the aperture D2 of the second side surface of the first lens, it is beneficial to reduce the height of the light entering the second lens, achieve a small aperture, and at the same time take into account the manufacturability of the lens. Preferably, 4.6 ≤ |R2 / D2| ≤ 32.

[0144] In this embodiment, the radius of curvature R9 of the first side surface of the fifth lens and the center thickness d9 of the fifth lens satisfy the condition: 20 ≤ R9 / d9 ≤ 220. Satisfying this condition, a reasonable ratio of radius of curvature to center thickness (a larger radius of curvature results in a smoother lens surface, and a smaller center thickness results in a thinner lens) is beneficial for reducing the overall size of the optical lens. Preferably, 30 ≤ R9 / d9 ≤ 200.

[0145] In this embodiment, the light-transmitting aperture D12 of the second side of the sixth lens, the optical back focal length of the optical lens (i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane), and the image height H corresponding to the maximum field of view of the optical lens satisfy the condition: D12*BFL / H≥26. Satisfying this condition ensures a long back focal length under the same imaging plane and image height, which is beneficial for achieving a small CRA (Cost Reduction Aspect Ratio). Preferably, D12*BFL / H≥32. This image height H includes the image height x_h in the x-direction and the image height y_h in the y-direction.

[0146] In this embodiment, the focal length F6 of the sixth lens satisfies the condition 0.6 ≤ F6 / F with the total focal length F of the optical lens. Satisfying this condition facilitates the rational allocation of the focal length of the sixth lens, and the crescent shape of the sixth lens allows light rays to have a longer optical path to the imaging plane, which is beneficial for achieving a small CRA (Current Radiation Amplitude). Preferably, 1.3 ≤ F6 / F.

[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 ≤ -0.06. Satisfying this condition facilitates the rational allocation of the focal length of the second lens, improves light collection, ensures sufficient light transmission, and enhances resolution. Preferably, F2 / F ≤ -0.5.

[0148] In this embodiment, the focal length F3 of the third lens and the total focal length F of the optical lens satisfy the condition: F3 / F ≤ -0.05. Satisfying this condition facilitates the rational allocation of the focal length of the third lens, helps to diverge the center and edge light rays passing through the third lens, facilitates the enlargement of the aperture, improves system illumination, and thus increases the light transmission of the optical lens. Preferably, F3 / F ≤ -0.1.

[0149] In this embodiment, the focal length F4 of the fourth lens satisfies the following relationship with the total focal length F of the optical lens: 0.38 ≤ F4 / F ≤ 2.2. Satisfying this condition facilitates the rational allocation of the fourth lens's focal length, helps correct chromatic aberration in various fields of view, and improves image quality. Preferably, 0.84 ≤ F4 / F ≤ 1.7.

[0150] In this embodiment, the focal length F5 of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 1.22 ≤ F5 / F ≤ 4.37. Satisfying this condition facilitates the rational allocation of the focal length of the fifth lens. Furthermore, its first side surface is convex, which can compress the angle of the incident light, achieving a smooth transition of light rays and allowing diverging light rays to smoothly enter the rear, further smoothing the light path transition. This helps to reduce the aperture of the rear lens and lowers system sensitivity. Preferably, 1.78 ≤ F5 / F ≤ 3.1.

[0151] Optionally, the aforementioned optical lens may also include a color filter for correcting color deviation and a protective glass for protecting the photosensitive element located on the imaging surface.

[0152] The optical lens in this application can employ multiple lenses, such as the six lenses mentioned above. This application does not specifically limit the number of spherical and aspherical lenses; when image quality is a primary concern, the number of aspherical lenses can be increased. The characteristic of an aspherical lens is that its curvature changes continuously from the lens center to the lens periphery. Unlike a spherical lens, which has a constant curvature from the lens center to the lens periphery, an aspherical lens has better curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. By using aspherical lenses, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality.

[0153] In this exemplary embodiment, the solution is not limited to plastic or glass for the lenses. If temperature performance is a primary concern, the first, second, third, fourth, fifth, and sixth lenses can all be glass lenses. Optical lenses made of glass can suppress the shift in the back focus of the optical lens due to temperature changes, thereby improving system stability. Simultaneously, using glass avoids lens blurring caused by high and low temperature variations in the operating environment, thus preventing the normal use of the optical lens. For example, an all-glass optical lens has a wider temperature range, maintaining stable optical performance within the range of -40℃ to 105℃. Specifically, when resolution and reliability are of primary concern, the first to sixth lenses can all be aspherical glass lenses. Of course, in applications with lower temperature stability requirements, the first to sixth lenses in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce manufacturing costs. Alternatively, the first to sixth lenses in the optical lens can also be made of a combination of plastic and glass.

[0154] This application also provides an electronic device, including the aforementioned optical lens and an imaging element that converts the optical image formed by the optical lens into an electrical signal. The imaging element may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The electronic device may be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. This electronic device is equipped with the optical lens described above.

[0155] However, those skilled in the art will understand that the number of lenses constituting the optical lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although six lenses are described as an example in the embodiments, the optical lens is not limited to including six lenses. If necessary, the optical lens may also include other numbers of lenses.

[0156] 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.

[0157] It should be noted that any of the examples one through eight below are applicable to all embodiments of this application.

[0158] Example 1

[0159] like Figure 1 The diagram shown is a schematic of the optical lens structure of Example 1.

[0160] like Figure 1As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0161] The first lens L1 has positive 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 S6 is concave, and its second side surface S7 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 convex, and its second side surface S12 is convex. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the third lens L3 and the fourth lens L4 are cemented together to form a cemented doublet lens, the second side surface S7 of the third lens and the first side surface S7 of the fourth lens are the same surface.

[0162] In this example, the optical back focal length (BFL) of the optical lens is 23.504mm, the lens group length (TL) of the optical lens is 32.500mm, the total effective focal length (F) of the optical lens is 13.347mm, and the maximum field of view (FOV) of the optical lens is 32.430°.

[0163] Table 1 shows the basic structural parameters of the optical lens in Example 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0164] Surf Radius Thickness Nd Vd 1 36.407 2.363 1.81 25.48 2 125.216 2.814 3 13.150 3.802 1.59 61.25 4 5.089 6.023 STO unlimited 4.077 6 -11.397 3.163 1.85 23.79 7 -133.604 3.793 1.50 81.60 8 -8.303 0.100 9 155.511 3.132 1.69 54.57 10 -29.110 0.100 11 29.110 3.132 1.69 54.57 12 -155.511 21.890 13 unlimited 1.100 1.51 62.91 14 unlimited 0.510 IMA unlimited 0.000

[0165] Table 1

[0166] Example 2

[0167] like Figure 2 The diagram shown is a schematic of the optical lens structure in Example 2.

[0168] like Figure 2 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0169] The first lens L1 has positive 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 S6 is concave, and its second side surface S7 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 convex, and its second side surface S12 is convex. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the third lens L3 and the fourth lens L4 are cemented together to form a cemented doublet lens, the second side surface S7 of the third lens and the first side surface S7 of the fourth lens are the same surface.

[0170] In this example, the optical back focal length (BFL) of the optical lens is 23.478mm, the lens group length (TL) of the optical lens is 32.533mm, the total effective focal length (F) of the optical lens is 13.826mm, and the maximum field of view (FOV) of the optical lens is 32.082°.

[0171] Table 2 shows the basic structural parameters of the optical lens in Example 2, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0172] Surf Radius Thickness Nd Vd 1 48.275 2.445 1.81 25.48 2 201.154 3.181 3 13.075 3.868 1.59 61.25 4 5.107 6.063 STO unlimited 4.436 6 -11.211 3.135 1.85 23.79 7 -396.000 3.772 1.50 81.60 8 -8.304 0.100 9 204.493 2.717 1.69 54.57 10 -29.147 0.100 11 29.147 2.717 1.69 54.57 12 -204.493 21.870 13 unlimited 1.100 1.51 62.91 14 unlimited 0.510 IMA unlimited 0.000

[0173] Table 2

[0174] Example 3

[0175] like Figure 3 The diagram shown is a schematic of the optical lens structure in Example 3.

[0176] like Figure 3 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0177] The first lens L1 has positive 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 S6 is concave, and its second side surface S7 is concave. The fourth lens L4 has positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the third lens L3 and the fourth lens L4 are cemented together to form a cemented doublet lens, the second side surface S7 of the third lens and the first side surface S7 of the fourth lens are the same surface.

[0178] In this example, the optical back focal length (BFL) of the optical lens is 23.534mm, the lens group length (TL) of the optical lens is 32.374mm, the total effective focal length (F) of the optical lens is 13.438mm, and the maximum field of view (FOV) of the optical lens is 31.391°.

[0179] Table 3 shows the basic structural parameters of the optical lens in Example 3, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0180] Surf Radius Thickness Nd Vd 1 26.907 2.410 1.81 25.48 2 149.608 3.132 3 15.575 4.078 1.59 61.25 4 5.398 5.717 STO unlimited 4.108 6 -10.806 2.850 1.85 23.79 7 499.980 3.476 1.50 81.60 8 -8.786 0.100 9 612.346 3.315 1.69 54.57 10 -21.117 0.100 11 21.930 3.088 1.69 54.57 12 -116.087 21.920 13 unlimited 1.100 1.51 62.91 14 unlimited 0.510 IMA unlimited 0.000

[0181] Table 3

[0182] Example 4

[0183] like Figure 4 The diagram shown is a schematic of the optical lens structure of Example 4.

[0184] like Figure 4 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0185] The first lens L1 has positive 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 S6 is concave, and its second side surface S7 is concave. The fourth lens L4 has positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the third lens L3 and the fourth lens L4 are cemented together to form a cemented doublet lens, the second side surface S7 of the third lens and the first side surface S7 of the fourth lens are the same surface.

[0186] In this example, the optical back focal length (BFL) of the optical lens is 23.627mm, the lens group length (TL) of the optical lens is 32.368mm, the total effective focal length (F) of the optical lens is 13.476mm, and the maximum field of view (FOV) of the optical lens is 31.426°.

[0187] Table 4 shows the basic structural parameters of the optical lens in Example 4, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0188] Surf Radius Thickness Nd Vd 1 25.136 2.397 1.81 25.48 2 104.079 3.119 3 15.457 4.072 1.59 61.25 4 5.386 5.720 STO unlimited 4.111 6 -10.813 2.852 1.85 23.79 7 299.991 3.478 1.50 81.60 8 -8.790 0.100 9 475.183 3.341 1.69 54.57 10 -21.262 0.100 11 22.261 3.080 1.69 54.57 12 -104.975 22.020 13 unlimited 1.100 1.51 62.91 14 unlimited 0.510 IMA unlimited 0.000

[0189] Table 4

[0190] Example 5

[0191] like Figure 5 The diagram shown is a schematic of the optical lens structure of Example 5.

[0192] like Figure 5 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0193] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being convex. The second lens L2 has negative optical power, with its first side surface S3 being convex and its second side surface S4 being concave. The third lens L3 has negative optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has positive optical power, with its first side surface S7 being concave and its second side surface S8 being convex. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being convex. The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being convex. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the third lens L3 and the fourth lens L4 are cemented together to form a cemented doublet lens, the second side surface S7 of the third lens and the first side surface S7 of the fourth lens are the same surface.

[0194] In this example, the optical back focal length (BFL) of the optical lens is 23.510mm, the lens group length (TL) of the optical lens is 31.323mm, the total effective focal length (F) of the optical lens is 13.171mm, and the maximum field of view (FOV) of the optical lens is 31.174°.

[0195] Table 5 shows the basic structural parameters of the optical lens in Example 5, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0196] Surf Radius Thickness Nd Vd 1 36.907 2.476 1.81 25.48 2 -311.694 2.964 3 13.061 3.903 1.59 61.25 4 5.118 6.031 STO unlimited 3.801 6 -11.015 2.957 1.85 23.79 7 -240.435 3.561 1.50 81.60 8 -8.423 0.100 9 143.785 3.063 1.69 54.57 10 -22.250 0.100 11 24.068 2.366 1.69 54.57 12 -171.674 21.900 13 unlimited 1.100 1.51 62.91 14 unlimited 0.510 IMA unlimited 0.000

[0197] Table 5

[0198] Example 6

[0199] like Figure 6 The diagram shown is a schematic of the optical lens structure of Example 6.

[0200] like Figure 6 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0201] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being convex. The second lens L2 has negative optical power, with its first side surface S3 being convex and its second side surface S4 being concave. The third lens L3 has negative optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has positive optical power, with its first side surface S7 being concave and its second side surface S8 being convex. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being convex. The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being convex. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the third lens L3 and the fourth lens L4 are cemented together to form a cemented doublet lens, the second side surface S7 of the third lens and the first side surface S7 of the fourth lens are the same surface.

[0202] In this example, the optical back focal length (BFL) of the optical lens is 23.510mm, the lens group length (TL) of the optical lens is 31.107mm, the total effective focal length (F) of the optical lens is 13.205mm, and the maximum field of view (FOV) of the optical lens is 31.210°.

[0203] Table 6 shows the basic structural parameters of the optical lens in Example 6, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0204] Surf Radius Thickness Nd Vd 1 36.977 2.473 1.81 25.48 2 -338.620 2.962 3 13.098 3.902 1.59 61.25 4 5.050 6.072 STO unlimited 3.833 6 -10.996 2.940 1.85 23.79 7 -240.435 3.548 1.50 81.60 8 -8.477 0.100 9 144.217 3.291 1.69 54.57 10 -22.417 0.100 11 24.632 1.888 1.69 54.57 12 -157.982 21.900 13 unlimited 1.100 1.51 62.91 14 unlimited 0.510 IMA unlimited 0.000

[0205] Table 6

[0206] Example 7

[0207] like Figure 7 The diagram shown is a schematic of the optical lens structure of Example 7.

[0208] like Figure 7 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0209] The first lens L1 has positive 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 S6 is concave, and its second side surface S7 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 convex, and its second side surface S12 is concave. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the third lens L3 and the fourth lens L4 are cemented together to form a cemented doublet lens, the second side surface S7 of the third lens and the first side surface S7 of the fourth lens are the same surface.

[0210] In this example, the optical back focal length (BFL) of the optical lens is 23.354mm, the lens group length (TL) of the optical lens is 33.095mm, the total effective focal length (F) of the optical lens is 13.384mm, and the maximum field of view (FOV) of the optical lens is 31.732°.

[0211] Table 7 shows the basic structural parameters of the optical lens in Example 7, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0212] Surf Radius Thickness Nd Vd 1 35.375 2.375 1.81 25.48 2 177.264 2.932 3 12.862 3.986 1.59 61.25 4 5.189 5.850 STO unlimited 4.067 6 -10.934 2.852 1.85 23.79 7 -147.838 3.527 1.50 81.60 8 -8.424 0.100 9 165.991 4.168 1.69 54.57 10 -22.105 0.100 11 22.123 3.139 1.69 54.57 12 202.499 21.740 13 unlimited 1.100 1.51 62.91 14 unlimited 0.510 IMA unlimited 0.000

[0213] Table 7

[0214] Example 8

[0215] like Figure 8 The diagram shown is a schematic of the optical lens structure of Example 8.

[0216] like Figure 8 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0217] The first lens L1 has positive 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 S6 is concave, and its second side surface S7 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 convex, and its second side surface S12 is concave. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the third lens L3 and the fourth lens L4 are cemented together to form a cemented doublet lens, the second side surface S7 of the third lens and the first side surface S7 of the fourth lens are the same surface.

[0218] In this example, the optical back focal length (BFL) of the optical lens is 24.223mm, the lens group length (TL) of the optical lens is 31.775mm, the total effective focal length (F) of the optical lens is 13.287mm, and the maximum field of view (FOV) of the optical lens is 31.808°.

[0219] Table 8 shows the basic structural parameters of the optical lens of Example 8, where the units for radius of curvature (Radius) and thickness (Thickness / Distance) are millimeters (mm).

[0220] Surf Radius Thickness Nd Vd 1 35.704 2.143 1.81 25.48 2 190.455 2.787 3 12.836 3.984 1.59 61.25 4 5.204 5.817 STO unlimited 4.019 6 -11.012 2.853 1.85 23.79 7 -140.380 3.528 1.50 81.60 8 -8.414 0.100 9 162.264 3.283 1.69 54.57 10 -22.865 0.100 11 21.342 3.161 1.69 54.57 12 205.402 22.610 13 unlimited 1.100 1.51 62.91 14 unlimited 0.510 IMA unlimited 0.000

[0221] Table 8

[0222] In summary, Examples 1 through 8 satisfy the relationships shown in Table 9.

[0223] Conditional / Example 1 2 3 4 5 6 7 8 BFL / TL 0.723 0.722 0.727 0.730 0.751 0.756 0.706 0.762 |F34 / F| 11.220 18.469 12.984 12.018 60.233 130.061 55.948 37.837 d5 / TL 0.125 0.136 0.127 0.127 0.121 0.123 0.123 0.126 |(HF*θ) / (F*θ)| 0.002 0.026 0.024 0.020 0.052 0.048 0.017 0.022 |F1 / F| 4.682 5.619 2.981 2.989 3.096 3.119 4.037 4.049 |F / R3|+|F / R4| 3.638 3.765 3.352 3.374 3.582 3.623 3.620 3.589 D / H / FOV 0.059 0.060 0.067 0.067 0.070 0.070 0.063 0.061 |R2 / D2| 9.230 14.708 9.863 6.930 19.739 21.564 12.509 13.603 R9 / d9 49.645 75.275 184.696 142.232 46.944 43.825 39.824 49.428 D12*BFL / H 47.470 50.203 47.818 48.236 44.062 44.749 46.400 46.985 F6 / F 2.663 2.668 1.994 1.981 2.318 2.333 2.652 2.562 F2 / F -1.275 -1.251 -1.222 -1.221 -1.322 -1.284 -1.362 -1.382 F3 / F -1.041 -0.962 -0.932 -0.924 -1.001 -0.996 -0.991 -1.007 F4 / F 1.203 1.190 1.327 1.333 1.256 1.261 1.220 1.226 F5 / F 2.663 2.668 2.191 2.180 2.121 2.132 2.117 2.187

[0224] Table 9

[0225] Table 10 gives the effective focal length F of the optical lenses in Examples 1 to 8, and the effective focal lengths of each lens from F1 to F6, etc. (unit: mm).

[0226] Parameters / Examples 1 2 3 4 5 6 7 8 BFL 23.504 23.478 23.534 23.627 23.510 23.510 23.354 24.223 TL 32.500 32.533 32.374 32.368 31.323 31.107 33.095 31.775 F1 62.484 77.684 40.059 40.273 40.777 41.184 54.032 53.792 F2 -17.023 -17.292 -16.419 -16.455 -17.418 -16.957 -18.234 -18.364 F3 -13.900 -13.302 -12.525 -12.450 -13.178 -13.155 -13.258 -13.382 F4 16.058 16.455 17.826 17.966 16.548 16.651 16.334 16.285 F5 35.537 36.891 29.442 29.371 27.943 28.151 28.332 29.054 F6 35.537 36.891 26.792 26.698 30.531 30.800 35.492 34.038 F34 149.756 255.357 -174.473 -161.951 793.360 1717.410 748.820 502.734 d5 4.077 4.436 4.108 4.111 3.801 3.833 4.067 4.019 H 7.541 7.541 7.541 7.541 7.541 7.541 7.541 7.541 F 13.347 13.826 13.438 13.476 13.171 13.205 13.384 13.287 θ 0.566 0.560 0.548 0.548 0.544 0.545 0.554 0.555 R3 13.150 13.075 15.575 15.457 13.061 13.098 12.862 12.836 R4 5.089 5.107 5.398 5.386 5.118 5.050 5.189 5.204 D 14.436 14.534 15.956 15.832 16.495 16.413 14.999 14.722 FOV 32.430 32.082 31.391 31.426 31.174 31.210 31.732 31.808 R2 125.216 201.154 149.608 104.079 -311.694 -338.620 177.264 190.455 D2 13.566 13.676 15.169 15.019 15.791 15.703 14.170 14.001 R9 155.511 204.493 612.346 475.183 143.785 144.217 165.991 162.264 d9 3.132 2.717 3.315 3.341 3.063 3.291 4.168 3.283 D12 15.231 16.126 15.323 15.396 14.134 14.354 14.983 14.628

[0227] Table 10

[0228] 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.

[0229] 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.

[0230] 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.

[0231] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An optical lens characterized in that, The total number of lenses with optical power in the optical lens is six, which comprises sequentially from the first side to the second side: a first lens with positive optical power, the first side of the first lens is convex; a second lens with negative optical power, the first side of the second lens is convex, and the second side is concave; a third lens with negative optical power, the first side of the third lens is concave; a fourth lens with positive optical power, the second side of the fourth lens is convex; a fifth lens with positive optical power, the first side of the fifth lens is convex, and the second side is convex; a sixth lens with positive optical power, the first side of the sixth lens is convex; The clear aperture D12 of the second side of the sixth lens, the optical back focal length of the optical lens, that is, the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging surface, and the image height H corresponding to the maximum field angle of the optical lens satisfy: 50.203≥D12*BFL / H≥26.

2. The optical lens of claim 1, wherein, The second side of the first lens is concave.

3. The optical lens of claim 1, wherein, The second side of the first lens is convex.

4. The optical lens of claim 1, wherein, The second side of the third lens is concave.

5. The optical lens of claim 1, wherein, The second side of the third lens is convex.

6. The optical lens of claim 1, wherein, The first side of the fourth lens is convex.

7. The optical lens of claim 1, wherein, The first side of the fourth lens is concave.

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

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

10. The optical lens of claim 1, wherein, The third lens and the fourth lens form a double cemented lens.

11. The optical lens of claim 1, wherein, The optical lens further comprises a diaphragm, which is arranged between the second lens and the third lens.

12. The optical lens of any of claims 1 to 11, wherein, The optical back focal length of the optical lens, that is, the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging surface, and the lens group length of the optical lens, that is, the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, satisfy: 0.762≥BFL / TL≥0.

46.

13. The optical lens of any of claims 1 to 11, wherein, The focal length value F34 of the double cemented lens formed by the third lens and the fourth lens and the total focal length value F of the optical lens satisfy: 130.061≥|F34 / F|≥9.

04.

14. The optical lens of any of claims 1 to 11, wherein, The air gap d5 between the diaphragm and the rear group lens and the lens group length of the optical lens, that is, the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, satisfy: 0.136≥d5 / TL≥0.

057.

15. The optical lens of any of claims 1 to 11, wherein, The image height H corresponding to the maximum field angle of the optical lens, the total focal length value F of the optical lens, and the radian value θ of the maximum field angle of the optical lens satisfy: 0.002≤|(H-F*θ) / (F*θ)|≤0.

2.

16. The optical lens of any of claims 1 to 11, wherein, The focal length value F1 of the first lens and the total focal length value F of the optical lens satisfy: 5.619≥|F1 / F|≥1.

05.

17. The optical lens of any of claims 1 to 11, wherein, The optical lens satisfies at least one of the following conditions:

18. The optical lens of any of claims 1 to 11, wherein, The optical back focal of the optical lens, i.e., the distance from the second side center of the last lens of the optical lens to the center of the imaging surface BFL and the lens group length of the optical lens, i.e., the distance from the first side center of the first lens of the optical lens to the second side center of the last lens of the optical lens TL satisfy: 0.762≥BFL / TL≥0.65; The focal length value F34 of the doublet lens formed by the third lens and the fourth lens and the total focal length value F of the optical lens satisfy: 130.061≥|F34 / F|≥9.2; 19. The optical lens of any of claims 1 to 11, wherein, The air gap d5 between the diaphragm and the rear group lens and the lens group length of the optical lens, i.e., the distance from the first side center of the first lens of the optical lens to the second side center of the last lens of the optical lens TL satisfy: 0.136≥d5 / TL≥0.088; 20. The optical lens of any of claims 1 to 11, wherein, The image height H corresponding to the maximum field of view angle of the optical lens, the total focal length value F of the optical lens and the radian value θ of the maximum field of view angle of the optical lens satisfy: 0.002≤|(H-F*θ) / (F*θ)|≤0.09; 21. The optical lens of any of claims 1 to 11, wherein, The focal length value F1 of the first lens and the total focal length value F of the optical lens satisfy: 5.619≥|F1 / F|≥2.1; 22. The optical lens of any of claims 1 to 11, wherein, The focal length value F2 of the second lens and the total focal length value F of the optical lens satisfy: -1.382≤F2 / F≤-0.

06.

23. The optical lens of any of claims 1 to 11, wherein, The focal length value F3 of the third lens and the total focal length value F of the optical lens satisfy: -1.041≤F3 / F≤-0.

05.

24. The optical lens of any of claims 1 to 11, wherein, The focal length value F4 of the fourth lens and the total focal length value F of the optical lens satisfy: 0.38≤F4 / F≤2.

2.

25. The optical lens of any of claims 1 to 11, wherein, The focal length value F5 of the fifth lens and the total focal length value F of the optical lens satisfy: 1.22≤F5 / F≤4.

37.

26. The optical lens of any of claims 1 to 11, wherein, The focal length value F6 of the sixth lens and the total focal length value F of the optical lens satisfy: 0.6≤F6 / F≤2.

668. The focal length value F of the optical lens, the radius of curvature R3 of the first side of the second lens and the radius of curvature R4 of the second side of the second lens satisfy: 1.52≤|F / R3|+|F / R4|≤5.

3. The maximum light passing aperture D of the first side of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H and the maximum field of view angle FOV of the optical lens satisfy: 0.059≤D / H / FOV≤0.

45. The radius of curvature R2 of the second side of the first lens and the light passing aperture D2 of the second side of the first lens satisfy: 2.5≤|R2 / D2|≤40. The radius of curvature R9 of the first side of the fifth lens and the central thickness d9 of the fifth lens satisfy: 20≤R9 / d9≤220. The total focal length F of the optical lens, the radius of curvature R3 of the first side of the second lens, and the radius of curvature R4 of the second side of the second lens satisfy the following condition: 2.3≤|F / R3|+|F / R4|≤4.86; 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: 0.059≤D / H / FOV≤0.28; The radius of curvature R2 of the second side surface of the first lens and the aperture D2 of the second side surface of the first lens satisfy the following condition: 4.6≤|R2 / D2|≤32; The radius of curvature R9 of the first side of the fifth lens and the center thickness d9 of the fifth lens satisfy the following condition: 30≤R9 / d9≤200; The light-transmitting aperture D12 of the second side of the sixth lens, the optical back focal length of the optical lens (i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane), and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 50.203≥D12*BFL / H≥32. The focal length F6 of the sixth lens satisfies the following relationship with the total focal length F of the optical lens: 1.3 ≤ F6 / F ≤ 2.668; The focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: -1.382 ≤ F2 / F ≤ -0.5; The focal length F3 of the third lens satisfies the following relationship with the total focal length F of the optical lens: -1.041 ≤ F3 / F ≤ -0.1; The focal length F4 of the fourth lens satisfies the following relationship with the total focal length F of the optical lens: 0.84 ≤ F4 / F ≤ 1.7; The focal length F5 of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 1.78 ≤ F5 / F ≤ 3.

1.

27. The optical lens of any of claims 1 to 11, wherein, The optical lens satisfies at least one of the following conditions: The optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, and the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, satisfy the following condition: 0.762≥BFL / TL≥0.

706. The focal length F34 of the cemented doublet formed by the third lens and the fourth lens satisfies the following relationship with the total focal length F of the optical lens: 130.061≥|F34 / F|≥11.220; The air gap d5 between the aperture stop and the rear group lens satisfies the following condition with respect to the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens: 0.136≥d5 / TL≥0.121; An image height H corresponding to a maximum field of view of the optical lens, an overall focal length F of the optical lens, and an arc value θ of the maximum field of view of the optical lens satisfy: 0.002≤|(H-F*θ) / (F*θ)|≤0.052; A focal length value F1 of the first lens and an overall focal length F of the optical lens satisfy: 5.619≥|F1 / F|≥2.981; The overall focal length F of the optical lens, a curvature radius R3 of a first side of the second lens, and a curvature radius R4 of a second side of the second lens satisfy: 3.352≤|F / R3|+|F / R4|≤3.765; A maximum aperture D of the first side of the first lens corresponding to a maximum field of view of the optical lens, an image height H corresponding to the maximum field of view of the optical lens, and a maximum field of view FOV of the optical lens satisfy: 0.059≤D / H / FOV≤0.070; A curvature radius R2 of a second side of the first lens and an aperture D2 of the second side of the first lens satisfy: 6.930≤|R2 / D2|≤21.564; A curvature radius R9 of a first side of the fifth lens and a central thickness d9 of the fifth lens satisfy: 39.824≤R9 / d9≤184.696; An aperture D12 of a second side of the sixth lens, an optical back focal length BFL of the optical lens, i.e., a distance from a second side center of a last lens of the optical lens to a center of an imaging surface, and an image height H corresponding to a maximum field of view of the optical lens satisfy: 50.203≥D12*BFL / H≥44.062; A focal length value F6 of the sixth lens and an overall focal length F of the optical lens satisfy: 1.981≤F6 / F≤2.668; A focal length value F2 of the second lens and an overall focal length F of the optical lens satisfy: -1.382≤F2 / F≤-1.221; A focal length value F3 of the third lens and an overall focal length F of the optical lens satisfy: -1.041≤F3 / F≤-0.924; A focal length value F4 of the fourth lens and an overall focal length F of the optical lens satisfy: 1.190≤F4 / F≤1.333; A focal length value F5 of the fifth lens and an overall focal length F of the optical lens satisfy: 2.117≤F5 / F≤2.

668. The total number of lenses with optical power in the optical lens is six, including, in order from a first side to a second side:

28. An optical lens, characterized in that a first lens with positive optical power; a second lens with negative optical power; a third lens with negative optical power; a fourth lens with positive optical power; a fifth lens with positive optical power; a sixth lens with positive optical power; A focal length value F34 of a doublet lens formed by the third lens and the fourth lens and an overall focal length F of the optical lens satisfy: 130.061≥|F34 / F|≥9.04; ​ An air gap d5 between the diaphragm and the rear group of lenses and a lens group length of the optical lens, i.e., a distance TL from a first side center of the first lens to a second side center of the last lens of the optical lens, satisfy: 0.136≥d5 / TL≥0.

057.

29. The optical lens of claim 28, wherein, The first side of the first lens is convex, and the second side of the first lens is concave.

30. The optical lens of claim 28, wherein, The first side of the first lens is convex, and the second side of the first lens is convex.

31. The optical lens of claim 28, wherein, The first side of the second lens is convex, and the second side of the second lens is concave.

32. The optical lens of claim 28, wherein, The first side of the third lens is concave, and the second side of the third lens is concave.

33. The optical lens of claim 28, wherein, The first side of the third lens is concave, and the second side of the third lens is convex.

34. The optical lens of claim 28, wherein, The first side of the fourth lens is convex, and the second side of the fourth lens is convex.

35. The optical lens of claim 28, wherein, The first side of the fourth lens is concave, and the second side of the fourth lens is convex.

36. The optical lens of claim 28, wherein, The first side of the fifth lens is convex, and the second side of the fifth lens is convex.

37. The optical lens of claim 28, wherein, The first side of the sixth lens is convex, and the second side of the sixth lens is convex.

38. The optical lens of claim 28, wherein, The first side of the sixth lens is convex, and the second side of the sixth lens is concave.

39. The optical lens of claim 28, wherein, The third lens and the fourth lens are cemented to form a double-cemented lens.

40. The optical lens of claim 28, wherein, The optical lens further comprises a diaphragm, and the diaphragm is arranged between the second lens and the third lens.

41. The optical lens of any of claims 28-40, wherein, An optical back focal length of the optical lens, i.e., a center distance BFL from a second side center of the last lens of the optical lens to a center of an imaging surface and a lens group length of the optical lens, i.e., a distance TL from a first side center of the first lens to the second side center of the last lens of the optical lens, satisfy: 0.762≥BFL / TL≥0.

46.

42. The optical lens of any of claims 28-40, wherein, An air gap d5 between the diaphragm and the rear group of lenses and a lens group length of the optical lens, i.e., a distance TL from a first side center of the first lens to a second side center of the last lens of the optical lens, satisfy: 0.136≥d5 / TL≥0.

057.

43. The optical lens of any of claims 28-40, wherein, An image height H corresponding to a maximum field of view angle of the optical lens, an overall focal length value F of the optical lens, and an arc value θ of the maximum field of view angle of the optical lens satisfy: 0.002≤|(H-F*θ) / (F*θ)|≤0.

2.

44. The optical lens of any of claims 28-40, wherein, A focal length value F1 of the first lens and an overall focal length value F of the optical lens satisfy: 5.619≥|F1 / F|≥1.

05.

45. The optical lens of any of claims 28-40, wherein, An overall focal length value F of the optical lens, a curvature radius R3 of the first side of the second lens, and a curvature radius R4 of the second side of the second lens satisfy: 1.52≤|F / R3|+|F / R4|≤5.

3.

46. The optical lens of any of claims 28 to 40, wherein, A maximum light aperture D of the first side of the first lens corresponding to a maximum field of view angle of the optical lens, an image height H corresponding to the maximum field of view angle of the optical lens, and a maximum field of view angle FOV of the optical lens satisfy: 0.059≤D / H / FOV≤0.

45.

47. The optical lens of any of claims 28-40, wherein, A curvature radius R2 of the second side of the first lens and a light aperture D2 of the second side of the first lens satisfy: 2.5≤|R2 / D2|≤40.

48. The optical lens of any of claims 28-40, wherein, A radius of curvature R9 of a first side of the fifth lens and a central thickness d9 of the fifth lens satisfy: 20≤R9 / d9≤220.

49. The optical lens of any of claims 28-40, wherein, A focal length value F6 of the sixth lens and a total focal length value F of the optical lens satisfy: 0.6≤F6 / F≤2.

668.

50. The optical lens of any of claims 28-40, wherein, A focal length value F2 of the second lens and a total focal length value F of the optical lens satisfy: -1.382≤F2 / F≤-0.

06.

51. The optical lens of any of claims 28 to 40, wherein, A focal length value F3 of the third lens and a total focal length value F of the optical lens satisfy: -1.041≤F3 / F≤-0.

05.

52. The optical lens of any of claims 28 to 40, wherein, A focal length value F4 of the fourth lens and a total focal length value F of the optical lens satisfy: 0.38≤F4 / F≤2.

2.

53. The optical lens of any of claims 28-40, wherein, A focal length value F5 of the fifth lens and a total focal length value F of the optical lens satisfy: 1.22≤F5 / F≤4.

37.

54. The optical lens of any of claims 28-40, wherein, The optical lens satisfies at least one of the following conditions: An optical back focal length of the optical lens, i.e., a distance BFL from a center of a second side of a last lens of the optical lens to a center of an imaging surface, and a lens group length of the optical lens, i.e., a distance TL from a first side center of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, satisfy: 0.762≥BFL / TL≥0.65; A focal length value F34 of a doublet lens formed by the third lens and the fourth lens and a total focal length value F of the optical lens satisfy: 130.061≥|F34 / F|≥9.2; An air gap d5 between a stop and a rear group lens and a lens group length of the optical lens, i.e., a distance TL from a first side center of the first lens of the optical lens to a center of a second side of a last lens of the optical lens, satisfy: 0.136≥d5 / TL≥0.088; An image height H corresponding to a maximum field of view angle of the optical lens, a total focal length value F of the optical lens, and an arc value θ of the maximum field of view angle of the optical lens satisfy: 0.002≤|(H-F*θ) / (F*θ)|≤0.09; A focal length value F1 of the first lens and a total focal length value F of the optical lens satisfy: 5.619≥|F1 / F|≥2.1; A total focal length value F of the optical lens, a radius of curvature R3 of a first side of the second lens, and a radius of curvature R4 of a second side of the second lens satisfy: 2.3≤|F / R3|+|F / R4|≤4.86; A maximum entrance pupil D of the first side of the first lens corresponding to a maximum field of view angle of the optical lens, an image height H corresponding to the maximum field of view angle of the optical lens, and a maximum field of view angle FOV of the optical lens satisfy: 0.059≤D / H / FOV≤0.28; A radius of curvature R2 of a second side of the first lens and an entrance pupil D2 of the second side of the first lens satisfy: 4.6≤|R2 / D2|≤32; A radius of curvature R9 of a first side surface of the fifth lens and a central thickness d9 of the fifth lens satisfy: 30≤R9 / d9≤200; An entrance pupil diameter D12 of a second side surface of the sixth lens, an optical back focal length of the optical lens, i.e., a distance BFL from a second side center of a last lens of the optical lens to a center of an imaging surface, and an image height H corresponding to a maximum field angle of the optical lens satisfy: 50.203≥D12*BFL / H≥32; A focal length value F6 of the sixth lens and an overall focal length value F of the optical lens satisfy: 1.3≤F6 / F≤2.668; A focal length value F2 of the second lens and an overall focal length value F of the optical lens satisfy: -1.382≤F2 / F≤-0.5; A focal length value F3 of the third lens and an overall focal length value F of the optical lens satisfy: -1.041≤F3 / F≤-0.1; A focal length value F4 of the fourth lens and an overall focal length value F of the optical lens satisfy: 0.84≤F4 / F≤1.7; A focal length value F5 of the fifth lens and an overall focal length value F of the optical lens satisfy: 1.78≤F5 / F≤3.

1.

55. The optical lens of any of claims 28-40, wherein, The optical lens satisfies at least one of the following conditions: An optical back focal length of the optical lens, i.e., a distance BFL from a second side center of a last lens of the optical lens to a center of an imaging surface, and a lens group length of the optical lens, i.e., a distance TL from a first side center of the first lens of the optical lens to the second side center of the last lens of the optical lens satisfy: 0.762≥BFL / TL≥0.706; A focal length value F34 of a doublet lens formed by the third lens and the fourth lens and an overall focal length value F of the optical lens satisfy: 130.061≥|F34 / F|≥11.220; An air gap d5 between a stop and a rear group lens and a lens group length of the optical lens, i.e., a distance TL from a first side center of the first lens of the optical lens to the second side center of the last lens of the optical lens satisfy: 0.136≥d5 / TL≥0.121; An image height H corresponding to a maximum field angle of the optical lens, an overall focal length value F of the optical lens, and an arc value θ of the maximum field angle of the optical lens satisfy: 0.002≤|(H-F*θ) / (F*θ)|≤0.052; A focal length value F1 of the first lens and an overall focal length value F of the optical lens satisfy: 5.619≥|F1 / F|≥2.981; An overall focal length value F of the optical lens, a radius of curvature R3 of a first side surface of the second lens, and a radius of curvature R4 of a second side surface of the second lens satisfy: 3.352≤|F / R3|+|F / R4|≤3.765; A maximum entrance pupil diameter D of the first side surface of the first lens corresponding to a maximum field angle of the optical lens, an image height H corresponding to the maximum field angle of the optical lens, and a maximum field angle FOV of the optical lens satisfy: 0.059≤D / H / FOV≤0.070; a radius of curvature R2 of the second side of the first lens and an entrance pupil diameter D2 of the second side of the first lens satisfy: 6.930≤|R2 / D2|≤21.564; a radius of curvature R9 of the first side of the fifth lens and a central thickness d9 of the fifth lens satisfy: 39.824≤R9 / d9≤184.696; an entrance pupil diameter D12 of the second side of the sixth lens, an optical back focal length of the optical lens, i.e. a distance BFL from a second side center of a last lens of the optical lens to a center of an imaging surface, and an image height H corresponding to a maximum field angle of the optical lens satisfy: 50.203≥D12*BFL / H≥44.062; a focal length value F6 of the sixth lens and an overall focal length value F of the optical lens satisfy: 1.981≤F6 / F≤2.668; a focal length value F2 of the second lens and an overall focal length value F of the optical lens satisfy: -1.382≤F2 / F≤-1.221; a focal length value F3 of the third lens and an overall focal length value F of the optical lens satisfy: -1.041≤F3 / F≤-0.924; a focal length value F4 of the fourth lens and an overall focal length value F of the optical lens satisfy: 1.190≤F4 / F≤1.333; a focal length value F5 of the fifth lens and an overall focal length value F of the optical lens satisfy: 2.117≤F5 / F≤2.

668.

56. An electronic device, comprising: An imaging device comprising the optical lens according to any one of claims 1 to 55 and an imaging element for converting an optical image formed by the optical lens into an electric signal.

Images