Optical lenses and electronic devices

Abstract

The present invention provides an optical lens and an electronic device. The optical lens includes, in order from the object side to the image side along the optical axis: a first lens having negative optical focal length; a second lens having positive optical focal length; a third lens having positive optical focal length, at least one of the object side surface and the image side surface of the third lens being a convex surface; a fourth lens having positive optical focal length, the object side surface of the fourth lens being a convex surface, and the image side surface of the fourth lens being a convex surface; a fifth lens having positive optical focal length, the object side surface of the fifth lens being a convex surface, and the image side surface of the fifth lens being a convex surface; a sixth lens having negative optical focal length, the object side surface of the sixth lens being a concave surface, and the image side surface of the sixth lens being a concave surface; a seventh lens having positive optical focal length, at least one of the object side surface and the image side surface of the seventh lens being a convex surface; and an eighth lens having negative optical focal length. The present invention solves the problem that optical lenses in the prior art cannot guarantee a small FNO while taking into account high resolution, long focal length and large angular resolution, and multi-wavelength confocality within a broadband.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging equipment, and in particular to an optical lens and electronic equipment. Background Art

[0002] In recent years, with the development of semiconductor technology, small-pixel and high-pixel chips have emerged, and the automotive industry, especially the automotive lens industry, has also entered the fast lane. Automotive lenses are a type of optical lenses.

[0003] As a key component of intelligent driving, autonomous vehicles play an indispensable role in vehicle safety and intelligence. High-performance, high-pixel automotive lenses play a crucial role in this process. Among autonomous vehicle lenses, front-facing optical lenses, as a crucial module for determining road conditions ahead, demand higher resolution while also being compact. Currently, mainstream front-facing optical lenses have 8M pixels, which doesn't scale well with the pace of chip development. This has led to slower-than-expected growth in the autonomous driving industry. The market needs a low-cost automotive lens that can accommodate higher pixels while maintaining performance, as a breakthrough.

[0004] The prior art provides an optical lens with a large FNO, which cannot achieve a small FNO and a long focal length while also achieving a high angular resolution. The prior art also provides an optical lens that cannot achieve high-resolution confocal imaging with multiple wavelengths within a broadband.

[0005] In other words, the optical lenses in the prior art have the problem of being unable to ensure a small FNO while taking into account high resolution, long focal length and large angular resolution, and multi-wavelength confocality within a broadband. Summary of the Invention

[0006] The main purpose of the present invention is to provide an optical lens and an electronic device to solve the problem that the optical lens in the prior art cannot ensure a small FNO while taking into account high resolution, long focal length and large angular resolution, and multi-wavelength confocality within a broadband.

[0007] To achieve the above objectives, according to one aspect of the present invention, there is provided an optical lens, comprising, in order from the object side to the image side along the optical axis: a first lens having negative focal power, at least one of the object-side surface and the image-side surface of the first lens being concave; a second lens having positive focal power, at least one of the object-side surface and the image-side surface of the second lens being convex; a third lens having positive focal power, at least one of the object-side surface and the image-side surface of the third lens being convex; a fourth lens having positive focal power, the object-side surface of the fourth lens being convex, and the image-side surface of the fourth lens being convex; a fifth lens having positive focal power, the object-side surface of the fifth lens being convex, and the image-side surface of the fifth lens being convex; a sixth lens having negative focal power, the object-side surface of the sixth lens being concave, and the image-side surface of the sixth lens being concave; a seventh lens having positive focal power, at least one of the object-side surface and the image-side surface of the seventh lens being convex; and an eighth lens having negative focal power, at least one of the object-side surface and the image-side surface of the eighth lens being concave.

[0008] Furthermore, the object-side surface of the first lens is a concave surface, and the image-side surface of the first lens is a concave surface.

[0009] Furthermore, the object-side surface of the first lens is concave, and the image-side surface of the first lens is convex.

[0010] Furthermore, the object-side surface of the second lens is convex, and the image-side surface of the second lens is concave.

[0011] Furthermore, the object-side surface of the second lens is a convex surface, and the image-side surface of the second lens is a convex surface.

[0012] Furthermore, the object-side surface of the third lens is a convex surface, and the image-side surface of the third lens is a convex surface.

[0013] Furthermore, the object-side surface of the third lens is convex, and the image-side surface of the third lens is concave.

[0014] Furthermore, the object-side surface of the seventh lens is convex, and the image-side surface of the seventh lens is concave.

[0015] Furthermore, the object-side surface of the seventh lens is convex, and the image-side surface of the seventh lens is convex.

[0016] Furthermore, the object-side surface of the eighth lens is concave, and the image-side surface of the eighth lens is concave.

[0017] Furthermore, the object-side surface of the eighth lens is convex, and the image-side surface of the eighth lens is concave.

[0018] Furthermore, the object-side surface of the eighth lens is concave, and the image-side surface of the eighth lens is convex.

[0019] Furthermore, the optical lens further includes a stop, which is arranged between the third lens and the fourth lens.

[0020] Furthermore, the image side surface of the third lens is aspherical, and the image side surface of the third lens has at least one inflection point; and / or the image side surface of the eighth lens is aspherical, and the image side surface of the eighth lens has at least one inflection point.

[0021] Furthermore, the third lens and / or the eighth lens is / are aspherical lenses.

[0022] Furthermore, the fifth lens and the sixth lens are cemented together to form a cemented lens.

[0023] Furthermore, the total optical length of the optical lens, that is, the distance TTL from the center of the object side of the first lens of the optical lens to the center of the imaging surface of the optical lens, and the entire focal length value F of the optical lens satisfy: TTL / F≤3.

[0024] Furthermore, the total optical length of the optical lens, that is, the distance TTL from the center of the object side of the first lens of the optical lens to the center of the imaging surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: TTL / H / FOV≤0.5.

[0025] Furthermore, the maximum field of view FOV of the optical lens, the entire focal length value F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: (FOV*F) / H≤60.

[0026] Furthermore, the focal length F5 of the fifth lens element of the optical lens and the focal length F6 of the sixth lens element of the optical lens satisfy the relationship: 1.45≤|F5 / F6|≤3.

[0027] Furthermore, the combined focal length value F56 of the fifth lens and the sixth lens of the optical lens and the entire focal length value F of the optical lens group satisfy: 0.5≤|F56 / F|≤2.

[0028] Furthermore, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤1.8.

[0029] Furthermore, the R value R1 of the object-side surface of the first lens of the optical lens and the focal length value F of the entire optical lens group satisfy: -2.4≤R1 / F≤-0.5.

[0030] Furthermore, the center thickness d5 of the fifth lens of the optical lens, the center thickness d6 of the sixth lens of the optical lens, and the total optical length of the optical lens, that is, the distance TTL from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy the following relationship: (d5+d6) / TTL≤0.18.

[0031] Furthermore, the entire focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy the following relationship: 1.45≤F / H≤2.

[0032] Furthermore, a maximum value dn of the center thickness of the second lens, the third lens, the fourth lens, the fifth lens, and the seventh lens of the optical lens and a minimum value dm of the center thickness of the second lens, the third lens, the fourth lens, the fifth lens, and the seventh lens of the optical lens satisfy the following relationship: dn / dm≤2.5.

[0033] Furthermore, the system focal length FR at a wavelength of 656 nm, the system focal length FG at a wavelength of 546 nm, and the system focal length FB at a wavelength of 435 nm satisfy the following relationship: (FR-FB) / FG≤0.01.

[0034] Furthermore, the system focal length FR at a wavelength of 656 nm and the system focal length FG at a wavelength of 546 nm satisfy the following relationship: 0.97≤FR / FG≤1.01.

[0035] Furthermore, the system focal length FG at a wavelength of 546 nm and the system focal length FB at a wavelength of 435 nm satisfy the following relationship: 0.97≤FB / FG≤1.01.

[0036] Furthermore, the refractive index Nd1 of the first lens element of the optical lens satisfies: Nd1 ≥ 1.6.

[0037] Furthermore, the optical back focus of the optical lens, that is, the distance BFL from the center of the image side of the eighth lens of the optical lens to the center of the imaging plane, and the total optical length of the optical lens, that is, the distance TTL from the center of the object side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following relationship: BFL / TTL≥0.04.

[0038] According to another aspect of the present invention, an optical lens is provided, comprising, in order from the object side to the image side along the optical axis: a first lens, the first lens having negative optical power; a second lens, the second lens having positive optical power; a third lens, the third lens having positive optical power; a fourth lens, the fourth lens having positive optical power; a fifth lens, the fifth lens having positive optical power; a sixth lens, the sixth lens having negative optical power; a seventh lens, the seventh lens having positive optical power; and an eighth lens, the eighth lens having negative optical power; wherein the maximum field of view (FOV) of the optical lens, the entire focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: (FOV*F) / H≤60.

[0039] Furthermore, the object-side surface of the first lens is a concave surface, and the image-side surface of the first lens is a concave surface.

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

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

[0042] Furthermore, the object-side surface of the second lens is a convex surface, and the image-side surface of the second lens is a convex surface.

[0043] Furthermore, the object-side surface of the third lens is a convex surface, and the image-side surface of the third lens is a convex surface.

[0044] Furthermore, the object-side surface of the third lens is convex, and the image-side surface of the third lens is concave.

[0045] Furthermore, the object-side surface of the fourth lens is a convex surface, and the image-side surface of the fourth lens is a convex surface.

[0046] Furthermore, the object-side surface of the fifth lens is a convex surface, and the image-side surface of the fifth lens is a convex surface.

[0047] Furthermore, the object-side surface of the sixth lens is concave, and the image-side surface of the sixth lens is concave.

[0048] Furthermore, the object-side surface of the seventh lens is convex, and the image-side surface of the seventh lens is concave.

[0049] Furthermore, the object-side surface of the seventh lens is convex, and the image-side surface of the seventh lens is convex.

[0050] Furthermore, the object-side surface of the eighth lens is concave, and the image-side surface of the eighth lens is concave.

[0051] Furthermore, the object-side surface of the eighth lens is convex, and the image-side surface of the eighth lens is concave.

[0052] Furthermore, the object-side surface of the eighth lens is concave, and the image-side surface of the eighth lens is convex.

[0053] Furthermore, the optical lens further includes a stop, which is arranged between the third lens and the fourth lens.

[0054] Furthermore, the image side surface of the third lens is aspherical, and the image side surface of the third lens has at least one inflection point; and / or the image side surface of the eighth lens is aspherical, and the image side surface of the eighth lens has at least one inflection point.

[0055] Furthermore, the third lens and / or the eighth lens is / are aspherical lenses.

[0056] Furthermore, the fifth lens and the sixth lens are cemented together to form a cemented lens.

[0057] Furthermore, the total optical length of the optical lens, that is, the distance TTL from the center of the object side of the first lens of the optical lens to the center of the imaging surface of the optical lens, and the entire focal length value F of the optical lens satisfy: TTL / F≤3.

[0058] Furthermore, the total optical length of the optical lens, that is, the distance TTL from the center of the object side of the first lens of the optical lens to the center of the imaging surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: TTL / H / FOV≤0.5.

[0059] Furthermore, the focal length F5 of the fifth lens element of the optical lens and the focal length F6 of the sixth lens element of the optical lens satisfy the relationship: 1.45≤|F5 / F6|≤3.

[0060] Furthermore, the combined focal length value F56 of the fifth lens and the sixth lens of the optical lens and the entire focal length value F of the optical lens group satisfy: 0.5≤|F56 / F|≤2.

[0061] Furthermore, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤1.8.

[0062] Furthermore, the R value R1 of the object-side surface of the first lens of the optical lens and the focal length value F of the entire optical lens group satisfy: -2.4≤R1 / F≤-0.5.

[0063] Furthermore, the center thickness d5 of the fifth lens of the optical lens, the center thickness d6 of the sixth lens of the optical lens, and the total optical length of the optical lens, that is, the distance TTL from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy the following relationship: (d5+d6) / TTL≤0.18.

[0064] Furthermore, the entire focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy the following relationship: 1.45≤F / H≤2.

[0065] Furthermore, a maximum value dn of the center thickness of the second lens, the third lens, the fourth lens, the fifth lens, and the seventh lens of the optical lens and a minimum value dm of the center thickness of the second lens, the third lens, the fourth lens, the fifth lens, and the seventh lens of the optical lens satisfy the following relationship: dn / dm≤2.5.

[0066] Furthermore, the system focal length FR at a wavelength of 656 nm, the system focal length FG at a wavelength of 546 nm, and the system focal length FB at a wavelength of 435 nm satisfy the following relationship: (FR-FB) / FG≤0.01.

[0067] Furthermore, the system focal length FR at a wavelength of 656 nm and the system focal length FG at a wavelength of 546 nm satisfy the following relationship: 0.97≤FR / FG≤1.01.

[0068] Furthermore, the system focal length FG at a wavelength of 546 nm and the system focal length FB at a wavelength of 435 nm satisfy the following relationship: 0.97≤FB / FG≤1.01.

[0069] Furthermore, the refractive index Nd1 of the first lens element of the optical lens satisfies: Nd1 ≥ 1.6.

[0070] Furthermore, the optical back focus of the optical lens, that is, the distance BFL from the center of the image side of the eighth lens of the optical lens to the center of the imaging plane, and the total optical length of the optical lens, that is, the distance TTL from the center of the object side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following relationship: BFL / TTL≥0.04.

[0071] According to another aspect of the present invention, there is provided an electronic device, characterized in that it includes the above-mentioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0072] According to the technical solution of the present invention, the optical lens comprises, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens, wherein the first lens has negative focal power, and at least one of the object side surface and the image side surface of the first lens is a concave surface; the second lens has positive focal power, and at least one of the object side surface and the image side surface of the second lens is a convex surface; the third lens has positive focal power, and at least one of the object side surface and the image side surface of the third lens is a convex surface; the fourth lens has positive focal power, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; the fifth lens has positive focal power, the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power, the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface; the seventh lens has positive focal power, and at least one of the object side surface and the image side surface of the seventh lens is a convex surface; the eighth lens has negative focal power, and at least one of the object side surface and the image side surface of the eighth lens is a concave surface.

[0073] The first lens has negative optical power, and at least one of its object-side and image-side surfaces is concave. When both the object-side and image-side surfaces of the first lens are concave, light can enter the rear optical system smoothly, improving resolution and increasing light throughput. When both the object-side and image-side surfaces of the first lens are concave, light can enter the rear optical system more smoothly, reducing system sensitivity. A spherical lens is preferably used for the first lens to reduce manufacturing costs. The second lens has positive optical power, and at least one of its object-side and image-side surfaces is convex. When both the object-side and image-side surfaces of the second lens are convex, this helps smooth the path of light from the rear lens, ensuring that light emitted from the second lens is well received by the third lens. This also changes the path of light, making the light in the rear optical system smoother and reducing system sensitivity. When both the object-side and image-side surfaces of the second lens are convex, this helps collect light and changes the path of light, making the light in the rear optical system smoother and reducing system sensitivity. The second lens preferably uses a spherical lens, which helps reduce processing costs. The third lens has positive focal power, and at least one of the object-side surface and the image-side surface of the third lens is convex. When the object-side surface of the third lens is convex and the image-side surface of the third lens is convex, this is conducive to light convergence, reducing the aperture and tube length of the optical lens barrel, and facilitating miniaturization. When the object-side surface of the third lens is convex and the image-side surface of the third lens is concave, this is conducive to light convergence, reducing the aperture and tube length of the optical lens barrel, and facilitating miniaturization. The third lens preferably uses an aspherical lens, which helps balance aberrations and improve resolution. The fourth lens has positive focal power, and the object-side surface of the fourth lens is convex and the image-side surface of the fourth lens is convex. This is conducive to light convergence, reducing the aperture and tube length of the optical lens barrel, and facilitating miniaturization.

[0074] The fifth lens element has positive focal power, with its object-side surface and image-side surface being convex. The coordination of the fifth lens and the sixth lens element ensures a smooth transition of light rays from the fourth lens element to the image plane, reducing overall length. This fully corrects various aberrations in the optical system, improving resolution while maintaining a compact structure and optimizing optical performance such as distortion and CRA. This also facilitates coordination with the sixth lens element. The sixth lens element has negative focal power, with its object-side surface and image-side surface being concave. This arrangement facilitates coordination between the sixth lens element and the fifth lens element, ensuring a smooth transition of light rays from the fifth lens element to the image plane, reducing overall length. The seventh lens element has positive focal power, with at least one of its object-side and image-side surfaces being convex. When the object-side surface and image-side surface of the seventh lens element are convex, this facilitates light convergence, reduces the diameter and length of the optical lens tube, and facilitates miniaturization. When the object-side surface and image-side surface of the seventh lens element are convex, this facilitates smooth light transmission and reduces sensitivity. The eighth lens element has negative optical power, and at least one of the object-side surface and the image-side surface of the eighth lens element is concave. When the object-side surface of the eighth lens element is concave and the image-side surface of the eighth lens element is concave, this helps to smooth the path of light rays in front of the lens element, thereby improving the resolution. When the object-side surface of the eighth lens element is convex and the image-side surface of the eighth lens element is concave, this helps to smooth the path of light rays in front of the lens element, thereby improving the resolution. When the object-side surface of the eighth lens element is concave and the image-side surface of the eighth lens element is convex, this helps to smooth the path of light rays in front of the lens element, thereby improving the resolution. The eighth lens element preferably uses an aspherical lens, which helps to balance aberrations and improve resolution.

[0075] In addition, the optical lens of the present application has at least one of the beneficial effects of small FNO, high resolution, long focal length and large angular resolution, and confocality to meet various needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0077] Figure 1 A schematic structural diagram of an optical lens according to Example 1 of the present invention is shown;

[0078] Figure 2 A schematic structural diagram of an optical lens according to Example 2 of the present invention is shown;

[0079] Figure 3 A schematic structural diagram of an optical lens according to Example 3 of the present invention is shown;

[0080] Figure 4 Schematic diagram of the structure of the optical lens of Example 4 of the present invention is shown;

[0081] Figure 5 1. A schematic structural diagram of an optical lens according to Example 5 of the present invention is shown;

[0082] Figure 6 1. A schematic structural diagram of an optical lens according to Example 6 of the present invention is shown;

[0083] Figure 7 1. A schematic structural diagram of an optical lens according to Example 7 of the present invention is shown;

[0084] Figure 8 1. A schematic structural diagram of an optical lens according to Example 8 of the present invention is shown;

[0085] Figure 9 1. A schematic structural diagram of an optical lens according to Example 9 of the present invention is shown;

[0086] Figure 10 1. A schematic structural diagram of an optical lens according to Example 10 of the present invention is shown;

[0087] Figure 11 1. A schematic structural diagram of an optical lens according to Example 11 of the present invention is shown;

[0088] Figure 12 Schematic diagram of the structure of the optical lens of Example 12 of the present invention is shown.

[0089] The above drawings include the following reference numerals:

[0090] L1, first lens; S1, object-side surface of the first lens; S2, image-side surface of the first lens; L2, second lens; S3, object-side surface of the second lens; S4, image-side surface of the second lens; L3, third lens; S5, object-side surface of the third lens; S6, image-side surface of the third lens; STO, aperture stop; L4, fourth lens; S8, object-side surface of the fourth lens; S9, image-side surface of the fourth lens; L5, fifth lens; S10, object-side surface of the fifth lens; S11, image-side surface of the fifth lens ; L6, sixth lens; S11, object-side surface of the sixth lens; S12, image-side surface of the sixth lens; L7, seventh lens; S13, object-side surface of the seventh lens; S14, image-side surface of the seventh lens; L8, eighth lens; S15, object-side surface of the eighth lens; S16, image-side surface of the eighth lens; L9, filter; S17, object-side surface of the filter; S18, image-side surface of the filter; S19, object-side surface of the protective glass; S20, image-side surface of the protective glass; IMA, imaging surface. DETAILED DESCRIPTION

[0091] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0092] 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 ordinary technicians in the technical field to which this application belongs.

[0093] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0094] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0095] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0096] In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the convex surface position is not defined, it means that the lens surface is convex at least in the paraxial area; if the lens surface is concave and the concave surface position is not defined, it means that the lens surface is concave at least in the paraxial area. The surface of each lens close to the object side is called the object side surface of the lens, and the surface of each lens close to the image side is called the image side surface of the lens. The judgment of the surface shape in the paraxial area can be based on the judgment method of common knowledge in this field, and the positive and negative R value (R refers to the curvature radius of the paraxial area, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the convexity. In terms of the object side, when the R value is positive, it is judged to be convex, and when the R value is negative, it is judged to be concave; in terms of the image side, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0097] In exemplary embodiments, the optical lens provided herein can be used, for example, as an automotive lens. In this case, light from the object side can be imaged on the image side, with the left side being the object side and the right side being the image side. The image side of the optical lens is the imaging surface of the optical lens.

[0098] In exemplary embodiments, the optical lens provided herein can be used, for example, as a projection lens or a laser radar transmitter lens. In this case, the image side of the optical lens can be the image source side, and the object side can be the imaging side. Light from the image source side can be imaged on the imaging side. The image side of the optical lens is the image source side of the optical lens.

[0099] In order to solve the problem that optical lenses in the prior art cannot ensure a small FNO while taking into account high resolution, long focal length and large angular resolution, and multi-wavelength confocality within a broadband, the present invention provides an optical lens and an electronic device.

[0100] Example 1

[0101] like Figures 1 to 12 As shown, the optical lens includes, from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens, wherein the first lens has negative focal power, and at least one of the object-side surface and the image-side surface of the first lens is concave; the second lens has positive focal power, and at least one of the object-side surface and the image-side surface of the second lens is convex; the third lens has positive focal power, and at least one of the object-side surface and the image-side surface of the third lens is convex; the fourth lens has positive focal power, the object-side surface of the fourth lens is convex, and the image-side surface of the fourth lens is convex; the fifth lens has positive focal power, the object-side surface of the fifth lens is convex, and the image-side surface of the fifth lens is convex; the sixth lens has negative focal power, the object-side surface of the sixth lens is concave, and the image-side surface of the sixth lens is concave; the seventh lens has positive focal power, and at least one of the object-side surface and the image-side surface of the seventh lens is convex; the eighth lens has negative focal power, and at least one of the object-side surface and the image-side surface of the eighth lens is concave.

[0102] The first lens has negative optical power, and at least one of its object-side and image-side surfaces is concave. When both the object-side and image-side surfaces of the first lens are concave, light can enter the rear optical system smoothly, improving resolution and increasing light throughput. When both the object-side and image-side surfaces of the first lens are concave, light can enter the rear optical system more smoothly, reducing system sensitivity. A spherical lens is preferably used for the first lens to reduce manufacturing costs. The second lens has positive optical power, and at least one of its object-side and image-side surfaces is convex. When both the object-side and image-side surfaces of the second lens are convex, this helps smooth the path of light from the rear lens, ensuring that light emitted from the second lens is well received by the third lens. This also changes the path of light, making the light in the rear optical system smoother and reducing system sensitivity. When both the object-side and image-side surfaces of the second lens are convex, this helps collect light and changes the path of light, making the light in the rear optical system smoother and reducing system sensitivity. The second lens is preferably a spherical lens, which helps reduce processing costs. The third lens has positive focal power, and at least one of its object-side and image-side surfaces is convex. When the object-side surface of the third lens is convex and the image-side surface of the third lens is convex, this facilitates light convergence, reduces the diameter and length of the optical lens barrel, and facilitates miniaturization. When the object-side surface of the third lens is convex and the image-side surface of the third lens is concave, this facilitates light convergence, reduces the diameter and length of the optical lens barrel, and facilitates miniaturization. The third lens is preferably an aspherical lens, which helps balance aberrations and improves resolution. The fourth lens has positive focal power, with its object-side surface being convex and its image-side surface being convex. This facilitates light convergence, reduces the diameter and length of the optical lens barrel, and facilitates miniaturization. The fifth lens has positive focal power, with its object-side surface being convex and its image-side surface being convex. The coordination of the fifth lens and the sixth lens allows a smooth transition of light from the fourth lens to the imaging plane, reducing the overall length. The various aberrations of the optical system are fully corrected, improving resolution and optimizing optical properties such as distortion and CRA while maintaining a compact structure. This also facilitates coordination with the sixth lens element. The sixth lens element has negative focal power, with its object-side surface and image-side surface both concave. This arrangement facilitates coordination between the sixth lens element and the fifth lens element, smoothly transitioning light from the fifth lens element to the imaging plane, and reducing overall length. The seventh lens element has positive focal power, with at least one of its object-side and image-side surfaces being convex. When the object-side surface of the seventh lens element is convex and the image-side surface of the seventh lens element is concave, this facilitates light convergence, reduces the aperture and length of the optical lens barrel, and facilitates miniaturization. When the object-side surface of the seventh lens element and the image-side surface of the seventh lens element are convex, this facilitates smoothing of light paths and reduces sensitivity. The eighth lens element has negative focal power, with at least one of its object-side and image-side surfaces being concave.When the object-side surface of the eighth lens is concave and the image-side surface of the eighth lens is concave, this helps smooth the path of light rays from the front, thereby improving resolution. When the object-side surface of the eighth lens is convex and the image-side surface of the eighth lens is concave, this helps smooth the path of light rays from the front, thereby improving resolution. When the object-side surface of the eighth lens is concave and the image-side surface of the eighth lens is convex, this helps smooth the path of light rays from the front, thereby improving resolution. It is preferred that the eighth lens be an aspherical lens, as this helps balance aberrations and improve resolution.

[0103] In addition, the optical lens of the present application has at least one of the beneficial effects of small FNO, high resolution, long focal length and large angular resolution, and confocality to meet various needs of users.

[0104] In this embodiment, the object-side surface of the first lens is concave, and the image-side surface of the first lens is also concave. This ensures that light passing through the first lens enters the rear optical system smoothly, improving resolution and increasing light throughput. Furthermore, a spherical lens can be used for the first lens, reducing manufacturing costs.

[0105] In this embodiment, the object-side surface of the first lens is concave, while the image-side surface is convex. This allows light to enter the rear system more smoothly, reducing system sensitivity. Furthermore, a spherical lens can be used for the first lens, which helps reduce manufacturing costs.

[0106] In this embodiment, the object-side surface of the second lens is convex, and the image-side surface of the second lens is concave. The second lens is preferably a spherical lens. The concave image-side surface of the second lens facilitates the stable entry of light into the rear system, thereby ensuring a smooth light trajectory. Light emitted from the second lens can be well received by the third lens, while also changing the light trajectory, making the light in the rear system smoother and reducing system sensitivity.

[0107] In this embodiment, the object-side surface of the second lens is convex, and the image-side surface of the second lens is convex. The second lens is preferably a spherical lens, and the image-side surface of the second lens is convex, which is conducive to collecting light and changing the light trend, making the rear system light smoother and reducing system sensitivity.

[0108] In this embodiment, the object side surface of the third lens is convex, and the image side surface of the third lens is convex. The third lens is preferably an aspherical lens, which is conducive to light convergence, reducing the diameter and length of the optical lens barrel, and ensuring miniaturization.

[0109] In this embodiment, the object side surface of the third lens is convex, and the image side surface of the third lens is concave. The third lens is preferably an aspherical lens, which is conducive to light convergence, reducing the diameter and length of the optical lens barrel, and ensuring miniaturization.

[0110] In this embodiment, the object-side surface of the seventh lens is convex, and the image-side surface of the seventh lens is concave. The seventh lens has positive optical power, and the image-side surface of the seventh lens is concave, which is conducive to light convergence, reducing the diameter and length of the optical lens barrel, and facilitating miniaturization.

[0111] In this embodiment, the object-side surface of the seventh lens is convex, and the image-side surface of the seventh lens is convex. The seventh lens has positive optical power, and the image-side surface of the seventh lens is convex, which is conducive to smoothing the light flow and reducing sensitivity.

[0112] In this embodiment, the object-side surface of the eighth lens is concave, and the image-side surface of the eighth lens is concave. The eighth lens is preferably an aspherical lens, which helps to smooth the direction of the front light and improve the resolution.

[0113] In this embodiment, the object-side surface of the eighth lens is convex, and the image-side surface of the eighth lens is concave. The eighth lens is preferably an aspherical lens, which helps to smooth the direction of the front light and improve the resolution.

[0114] In this embodiment, the object side surface of the eighth lens is concave, and the image side surface of the eighth lens is convex. The eighth lens is preferably an aspherical lens, which helps to smooth the direction of the front light and improve the resolution.

[0115] In this embodiment, the optical lens further includes an aperture, which is disposed between the third lens and the fourth lens. This helps the aperture converge the front and rear light, shortens the overall length of the optical system, and reduces the aperture of the front and rear lens groups.

[0116] In this embodiment, the image-side surface of the third lens element is aspherical and has at least one inflection point; the image-side surface of the eighth lens element is also aspherical and has at least one inflection point. This helps balance the aberrations of the optical lens and improves the resolving power.

[0117] In this embodiment, the third lens and the eighth lens are aspherical lenses, which is beneficial for balancing the aberrations of the optical lens and improving the resolution.

[0118] In this embodiment, the fifth lens and the sixth lens are glued together to form a glued lens. This allows the light passing through the fourth lens to smoothly transition to the imaging surface, reducing the total length. This allows the various aberrations of the optical system to be fully corrected, and while maintaining a compact structure, it can improve resolution, optimize optical properties such as distortion and CRA. The fifth lens and the sixth lens are glued together, greatly reducing the air gap between the two lenses and reducing the total length of the system. At the same time, the number of assembly components between the fifth lens and the sixth lens is reduced, reducing the number of processes and reducing costs. It reduces the sensitivity of lens units to tolerances such as tilt or eccentricity generated during the assembly process, reduces light loss caused by reflections between lenses, and improves illumination. It can further reduce field curvature and correct the off-axis point aberrations of the system.

[0119] The cemented lens consists of a fifth lens element with positive refractive power and a sixth lens element with negative refractive power. The sixth lens element is a negative lens element that diverges light. By controlling the focal length of the sixth lens, aberrations introduced by the positive lens element can be effectively corrected, improving image quality and optimizing optical properties such as distortion and CRA. The fifth lens element is a positive focal length lens element that converges light. Properly setting the refractive power of the fifth lens further reduces aberrations while ensuring effective and smooth convergence of light, ensuring smooth arrival at the imaging surface, reducing overall weight and cost. After the fifth and sixth lenses are cemented together, light paths on the object side of the fifth lens and the image side of the sixth lens are nearly identical, with no significant deflection. Therefore, light emitted by the fifth lens is well received by the sixth lens, reducing light loss and improving relative illumination across all fields of view. The light transition between the image side of the fifth lens and the object side of the sixth lens is smooth. Even if the two lenses are tilted or misaligned during assembly, the light path does not change significantly, reducing the sensitivity of the lens during assembly.

[0120] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens element of the optical lens to the center of the imaging plane of the optical lens, and the overall focal length F of the optical lens satisfy the following equation: TTL / F ≤ 3. Meeting this condition effectively limits the length of the optical lens, facilitating miniaturization of the optical lens. Preferably, TTL / F ≤ 2.6.

[0121] In this embodiment, the total optical length of the optical lens (i.e., the distance TTL from the object-side center of the first lens element of the optical lens to the center of the imaging plane of the optical lens), the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: TTL / H / FOV ≤ 0.5. Meeting this conditional equation effectively limits the length of the optical lens for the same imaging plane and image height, facilitating miniaturization of the optical lens. Preferably, TTL / H / FOV ≤ 0.3.

[0122] In this embodiment, the maximum field of view (FOV) of the optical lens, the focal length (F) of the entire optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following equation: (FOV*F) / H≤60. Meeting this conditional equation achieves long-focus, high-angular resolution at the same image height. Preferably, (FOV*F) / H≤59.

[0123] In this embodiment, the focal length F5 of the fifth lens element of the optical lens and the focal length F6 of the sixth lens element of the optical lens satisfy the following relationship: 1.45 ≤ |F5 / F6| ≤ 3. This ensures that the focal lengths of the cemented fifth and sixth lenses are similar, facilitating a smooth transition of light, thereby improving resolution and correcting chromatic aberration. Preferably, 1.55 ≤ |F5 / F6| ≤ 2.5.

[0124] In this embodiment, the combined focal length F56 of the fifth and sixth lenses of the optical lens system satisfies the following relationship with the overall focal length F of the optical lens: 0.5 ≤ |F56 / F| ≤ 2. Properly matching the focal lengths of the cemented lenses allows for more light to enter smoothly, improving illumination. Preferably, 0.7 ≤ |F56 / F| ≤ 1.7.

[0125] In this embodiment, the optical lens's focal length F and its entrance pupil diameter ENPD satisfy the following relationship: F / ENPD ≤ 1.8. Meeting this conditional expression helps maintain a low FNO and maximize light throughput. Preferably, F / ENPD ≤ 1.7.

[0126] In this embodiment, the R value R1 of the object-side surface of the first lens element of the optical lens and the focal length F of the entire optical lens group satisfy the following relationship: -2.4 ≤ R1 / F ≤ -0.5. This conditional relationship ensures a larger radius of curvature of the object-side surface of the first lens element, facilitating smooth light transition and reducing system sensitivity. Preferably, -2.2 ≤ R1 / F ≤ -0.8.

[0127] In this embodiment, the center thickness d5 of the fifth lens element of the optical lens, the center thickness d6 of the sixth lens element of the optical lens, and the total optical length of the optical lens (i.e., the distance TTL from the center of the object side of the first lens element of the optical lens to the center of the imaging plane of the optical lens) satisfy the following relationship: (d5 + d6) / TTL ≤ 0.18. When this condition is met, appropriately increasing the center thickness of the cemented lens within a certain range can enhance light control capabilities, allowing more light to enter the rear system and improving relative illumination. Preferably, (d5 + d6) / TTL ≤ 0.16.

[0128] In this embodiment, the focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: 1.45 ≤ F / H ≤ 2. Meeting this conditional relationship facilitates proper control of light distribution and improves image resolution. Preferably, 1.55 ≤ F / H ≤ 1.85.

[0129] In this embodiment, the maximum thickness dn of the second, third, fourth, fifth, and seventh lenses of the optical lens and the minimum thickness dm of the second, third, fourth, fifth, and seventh lenses of the optical lens satisfy the following relationship: dn / dm ≤ 2.5. Meeting this conditional equation ensures that the center thicknesses of the lenses are similar, which helps minimize changes in light deflection across the entire optical lens at high and low temperatures, resulting in excellent temperature performance. Preferably, dn / dm ≤ 2.2.

[0130] In this embodiment, the system focal length FR at a wavelength of 656 nm, the system focal length FG at a wavelength of 546 nm, and the system focal length FB at a wavelength of 435 nm satisfy the following equation: (FR - FB) / FG ≤ 0.01. Meeting this conditional equation ensures that the optical lens maintains similar focal lengths when used in visible light and in single-wavelength R, G, B wavelength environments, achieving switchable confocality across a wide visible light band and single-wavelength R, G, B wavelengths. Preferably, (FR - FB) / FG ≤ 0.006.

[0131] In this embodiment, the system focal length FR at a wavelength of 656 nm satisfies the following relationship: 0.97 ≤ FR / FG ≤ 1.01. Meeting this conditional equation ensures that the focal lengths of the optical lens at wavelengths R and G are close, achieving confocality between the two wavelengths. Preferably, 0.98 ≤ FR / FG ≤ 1.005.

[0132] In this embodiment, the system focal length FG at a wavelength of 546 nm satisfies the following relationship: 0.97 ≤ FB / FG ≤ 1.01. Meeting this conditional equation ensures that the focal lengths of the optical lens at wavelengths B and G are close, achieving confocality between the single wavelengths. Preferably, 0.98 ≤ FB / FG ≤ 1.005.

[0133] In this embodiment, the refractive index Nd1 of the first lens element of the optical lens satisfies: Nd1 ≥ 1.6. The first lens element is preferably made of a high refractive index material, which is beneficial for reducing the front port diameter and improving the imaging quality. Preferably, Nd1 ≥ 1.7.

[0134] In this embodiment, the optical back focus of the optical lens (i.e., the distance BFL from the image-side center of the eighth lens element of the optical lens to the center of the imaging plane) and the total optical length of the optical lens (i.e., the distance TTL from the object-side center of the first lens element of the optical lens to the center of the imaging plane) satisfy the following relationship: BFL / TTL ≥ 0.04. Meeting this conditional equation ensures a guaranteed back focus while achieving miniaturization, facilitating module assembly. Preferably, BFL / TTL ≥ 0.05.

[0135] Example 2

[0136] like Figures 1 to 12As shown, the optical lens includes, from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens, wherein the first lens has negative focal power; the second lens has positive focal power; the third lens has positive focal power; the fourth lens has positive focal power; the fifth lens has positive focal power; the sixth lens has negative focal power; the seventh lens has positive focal power; and the eighth lens has negative focal power. The maximum field of view (FOV) of the optical lens, the focal length F of the entire optical lens group, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: (FOV*F) / H≤60. Preferably, (FOV*F) / H≤59.

[0137] The first lens has negative optical power. When the object-side surface of the first lens is concave and the image-side surface of the first lens is concave, light can enter the rear optical system smoothly, improving resolution and increasing light throughput. When the object-side surface of the first lens is concave and the image-side surface of the first lens is convex, light can enter the rear optical system more smoothly, reducing system sensitivity. A spherical lens is preferably used for the first lens, as this helps reduce manufacturing costs. The second lens has positive optical power, and at least one of its object-side and image-side surfaces is convex. When the object-side surface of the second lens is convex and the image-side surface of the second lens is concave, this helps smooth the path of light from the rear lens, ensuring that light emitted from the second lens is well received by the third lens. This also changes the path of light, making the light in the rear optical system smoother and reducing system sensitivity. When the object-side surface of the second lens is convex and the image-side surface of the second lens is convex, this helps collect light and changes the path of light, making the light in the rear optical system smoother and reducing system sensitivity. A spherical lens is preferably used for the second lens, as this helps reduce manufacturing costs. The third lens has positive focal power, and at least one of the object-side surface and the image-side surface of the third lens is convex. When the object-side surface of the third lens is convex and the image-side surface of the third lens is convex, this is conducive to light convergence, reducing the aperture and length of the optical lens barrel, and facilitating miniaturization. When the object-side surface of the third lens is convex and the image-side surface of the third lens is concave, this is conducive to light convergence, reducing the aperture and length of the optical lens barrel, and facilitating miniaturization. The third lens is preferably an aspheric lens, which is conducive to balancing aberrations and improving resolution. The fourth lens has positive focal power, and the object-side surface of the fourth lens is convex and the image-side surface of the fourth lens is convex. This is conducive to light convergence, reducing the aperture and length of the optical lens barrel, and facilitating miniaturization.

[0138] The fifth lens element has positive focal power. When the object-side surface of the fifth lens element is convex and the image-side surface of the fifth lens element is convex, the coordination of the fifth lens element and the sixth lens element allows for a smooth transition of light rays from the fourth lens element to the image plane, reducing the overall length. This fully corrects various aberrations of the optical system, improving resolution while maintaining a compact structure and optimizing optical properties such as distortion and CRA. This also facilitates coordination with the sixth lens element. The sixth lens element has negative focal power. When the object-side surface of the sixth lens element is concave and the image-side surface of the sixth lens element is concave, this arrangement facilitates coordination between the sixth lens element and the fifth lens element, facilitating a smooth transition of light rays from the fifth lens element to the image plane, reducing the overall length. The seventh lens element has positive focal power. When the object-side surface of the seventh lens element is convex and the image-side surface of the seventh lens element is concave, this facilitates light convergence, reducing the diameter and length of the optical lens tube and facilitating miniaturization. When the object-side surface of the seventh lens element is convex and the image-side surface of the seventh lens element is convex, this facilitates a smooth transition of light rays, reducing sensitivity. The eighth lens element has negative focal power. When the object side surface of the eighth lens is concave and the image side surface of the eighth lens is concave, this helps to smooth the direction of the light in front and helps to improve the resolving power. When the object side surface of the eighth lens is convex and the image side surface of the eighth lens is concave, this helps to smooth the direction of the light in front and helps to improve the resolving power. When the object side surface of the eighth lens is concave and the image side surface of the eighth lens is convex, this helps to smooth the direction of the light in front and helps to improve the resolving power. The eighth lens preferably uses an aspherical lens, which helps to balance aberrations and improve resolving power. In addition, the optical lens of the present application has at least one of the following beneficial effects: low FNO, high resolution, long focal length, large angular resolution, and confocality, to meet the various needs of users.

[0139] In this embodiment, the object-side surface of the first lens is concave, and the image-side surface of the first lens is also concave. This ensures that light passing through the first lens enters the rear optical system smoothly, improving resolution and increasing light throughput. Furthermore, a spherical lens can be used for the first lens, reducing manufacturing costs.

[0140] In this embodiment, the object-side surface of the first lens is concave, while the image-side surface is convex. This allows light to enter the rear system more smoothly, reducing system sensitivity. Furthermore, a spherical lens can be used for the first lens, which helps reduce manufacturing costs.

[0141] In this embodiment, the object-side surface of the second lens is convex, and the image-side surface of the second lens is concave. The second lens is preferably a spherical lens. The concave image-side surface of the second lens facilitates the stable entry of light into the rear system, thereby ensuring a smooth light trajectory. Light emitted from the second lens can be well received by the third lens, while also changing the light trajectory, making the light in the rear system smoother and reducing system sensitivity.

[0142] In this embodiment, the object-side surface of the second lens is convex, and the image-side surface of the second lens is convex. The second lens is preferably a spherical lens, and the image-side surface of the second lens is convex, which is conducive to collecting light and changing the light trend, making the rear system light smoother and reducing system sensitivity.

[0143] In this embodiment, the object side surface of the third lens is convex, and the image side surface of the third lens is convex. The third lens is preferably an aspherical lens, which is conducive to light convergence, reducing the diameter and length of the optical lens barrel, and ensuring miniaturization.

[0144] In this embodiment, the object side surface of the third lens is convex, and the image side surface of the third lens is concave. The third lens is preferably an aspherical lens, which is conducive to light convergence, reducing the diameter and length of the optical lens barrel, and ensuring miniaturization.

[0145] In this embodiment, the object-side surface of the fourth lens is convex, and the image-side surface of the fourth lens is convex, which is conducive to light convergence, reducing the diameter and length of the optical lens barrel, and facilitating miniaturization.

[0146] In this embodiment, the object-side surface of the fifth lens is convex, and the image-side surface of the fifth lens is convex, so that the fifth lens can smoothly transition the light passing through the fourth lens to the imaging surface, reducing the total length.

[0147] In this embodiment, the object-side surface of the sixth lens is concave, and the image-side surface of the sixth lens is concave. This arrangement facilitates the coordination of the sixth lens with the fifth lens, facilitates a smooth transition of light from the fifth lens to the imaging surface, and reduces the overall length.

[0148] In this embodiment, the object-side surface of the seventh lens is convex, and the image-side surface of the seventh lens is concave. The seventh lens has positive optical power, and the image-side surface of the seventh lens is concave, which is conducive to light convergence, reducing the diameter and length of the optical lens barrel, and facilitating miniaturization.

[0149] In this embodiment, the object-side surface of the seventh lens is convex, and the image-side surface of the seventh lens is convex. The seventh lens has positive optical power, and the image-side surface of the seventh lens is convex, which is conducive to smoothing the light flow and reducing sensitivity.

[0150] In this embodiment, the object-side surface of the eighth lens is concave, and the image-side surface of the eighth lens is concave. The eighth lens is preferably an aspherical lens, which helps to smooth the direction of the front light and improve the resolution.

[0151] In this embodiment, the object-side surface of the eighth lens is convex, and the image-side surface of the eighth lens is concave. The eighth lens is preferably an aspherical lens, which helps to smooth the direction of the front light and improve the resolution.

[0152] In this embodiment, the object side surface of the eighth lens is concave, and the image side surface of the eighth lens is convex. The eighth lens is preferably an aspherical lens, which helps to smooth the direction of the front light and improve the resolution.

[0153] In this embodiment, the optical lens further includes an aperture, which is disposed between the third lens and the fourth lens. This helps the aperture converge the front and rear light, shortens the overall length of the optical system, and reduces the aperture of the front and rear lens groups.

[0154] In this embodiment, the image-side surface of the third lens element is aspherical and has at least one inflection point; and / or the image-side surface of the eighth lens element is aspherical and has at least one inflection point. This helps balance the aberrations of the optical lens and improves the resolving power.

[0155] In this embodiment, the third lens and the eighth lens are aspherical lenses, which is beneficial for balancing the aberrations of the optical lens and improving the resolution.

[0156] In this embodiment, the fifth lens and the sixth lens are glued together to form a glued lens. This allows the light passing through the fourth lens to smoothly transition to the imaging surface, reducing the total length. This allows the various aberrations of the optical system to be fully corrected, and while maintaining a compact structure, it can improve resolution, optimize optical properties such as distortion and CRA. The fifth lens and the sixth lens are glued together, greatly reducing the air gap between the two lenses and reducing the total length of the system. At the same time, the number of assembly components between the fifth lens and the sixth lens is reduced, reducing the number of processes and reducing costs. It reduces the sensitivity of lens units to tolerances such as tilt or eccentricity generated during the assembly process, reduces light loss caused by reflections between lenses, and improves illumination. It can further reduce field curvature and correct the off-axis point aberrations of the system.

[0157] The cemented lens consists of a fifth lens element with positive refractive power and a sixth lens element with negative refractive power. The sixth lens element is a negative lens element that diverges light. By controlling the focal length of the sixth lens, aberrations introduced by the positive lens element can be effectively corrected, improving image quality and optimizing optical properties such as distortion and CRA. The fifth lens element is a positive focal length lens element that converges light. Properly setting the refractive power of the fifth lens further reduces aberrations while ensuring effective and smooth convergence of light, ensuring smooth arrival at the imaging surface, reducing overall weight and cost. After the fifth and sixth lenses are cemented together, light paths on the object side of the fifth lens and the image side of the sixth lens are nearly identical, with no significant deflection. Therefore, light emitted by the fifth lens is well received by the sixth lens, reducing light loss and improving relative illumination across all fields of view. The light transition between the image side of the fifth lens and the object side of the sixth lens is smooth. Even if the two lenses are tilted or misaligned during assembly, the light path does not change significantly, reducing the sensitivity of the lens during assembly.

[0158] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens element of the optical lens to the center of the imaging plane of the optical lens, and the overall focal length F of the optical lens satisfy the following equation: TTL / F ≤ 3. Meeting this condition effectively limits the length of the optical lens, facilitating miniaturization of the optical lens. Preferably, TTL / F ≤ 2.6.

[0159] In this embodiment, the total optical length of the optical lens (i.e., the distance TTL from the object-side center of the first lens element of the optical lens to the center of the imaging plane of the optical lens), the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: TTL / H / FOV ≤ 0.5. Meeting this conditional equation effectively limits the length of the optical lens for the same imaging plane and image height, facilitating miniaturization of the optical lens. Preferably, TTL / H / FOV ≤ 0.3.

[0160] In this embodiment, the focal length F5 of the fifth lens element of the optical lens and the focal length F6 of the sixth lens element of the optical lens satisfy the following relationship: 1.45 ≤ |F5 / F6| ≤ 3. This ensures that the focal lengths of the cemented fifth and sixth lenses are similar, facilitating a smooth transition of light, thereby improving resolution and correcting chromatic aberration. Preferably, 1.55 ≤ |F5 / F6| ≤ 2.5.

[0161] In this embodiment, the combined focal length F56 of the fifth and sixth lenses of the optical lens system satisfies the following relationship with the overall focal length F of the optical lens: 0.5 ≤ |F56 / F| ≤ 2. Properly matching the focal lengths of the cemented lenses allows for more light to enter smoothly, improving illumination. Preferably, 0.7 ≤ |F56 / F| ≤ 1.7.

[0162] In this embodiment, the optical lens's focal length F and its entrance pupil diameter ENPD satisfy the following relationship: F / ENPD ≤ 1.8. Meeting this conditional expression helps maintain a low FNO and maximize light throughput. Preferably, F / ENPD ≤ 1.7.

[0163] In this embodiment, the R value R1 of the object-side surface of the first lens element of the optical lens and the focal length F of the entire optical lens group satisfy the following relationship: -2.4 ≤ R1 / F ≤ -0.5. This conditional relationship ensures a larger radius of curvature of the object-side surface of the first lens element, facilitating smooth light transition and reducing system sensitivity. Preferably, -2.2 ≤ R1 / F ≤ -0.8.

[0164] In this embodiment, the center thickness d5 of the fifth lens element of the optical lens, the center thickness d6 of the sixth lens element of the optical lens, and the total optical length of the optical lens (i.e., the distance TTL from the center of the object side of the first lens element of the optical lens to the center of the imaging plane of the optical lens) satisfy the following relationship: (d5 + d6) / TTL ≤ 0.18. When this condition is met, appropriately increasing the center thickness of the cemented lens within a certain range can enhance light control capabilities, allowing more light to enter the rear system and improving relative illumination. Preferably, (d5 + d6) / TTL ≤ 0.16.

[0165] In this embodiment, the focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: 1.45 ≤ F / H ≤ 2. Meeting this conditional relationship facilitates proper control of light distribution and improves image resolution. Preferably, 1.55 ≤ F / H ≤ 1.85.

[0166] In this embodiment, the maximum thickness dn of the second, third, fourth, fifth, and seventh lenses of the optical lens and the minimum thickness dm of the second, third, fourth, fifth, and seventh lenses of the optical lens satisfy the following relationship: dn / dm ≤ 2.5. Meeting this conditional equation ensures that the center thicknesses of the lenses are similar, which helps minimize changes in light deflection across the entire optical lens at high and low temperatures, resulting in excellent temperature performance. Preferably, dn / dm ≤ 2.2.

[0167] In this embodiment, the system focal length FR at a wavelength of 656 nm, the system focal length FG at a wavelength of 546 nm, and the system focal length FB at a wavelength of 435 nm satisfy the following equation: (FR - FB) / FG ≤ 0.01. Meeting this conditional equation ensures that the optical lens maintains similar focal lengths when used in visible light and in single-wavelength R, G, B wavelength environments, achieving switchable confocality across a wide visible light band and single-wavelength R, G, B wavelengths. Preferably, (FR - FB) / FG ≤ 0.006.

[0168] In this embodiment, the system focal length FR at a wavelength of 656 nm satisfies the following relationship: 0.97 ≤ FR / FG ≤ 1.01. Meeting this conditional equation ensures that the focal lengths of the optical lens at wavelengths R and G are close, achieving confocality between the two wavelengths. Preferably, 0.98 ≤ FR / FG ≤ 1.005.

[0169] In this embodiment, the system focal length FG at a wavelength of 546 nm satisfies the following relationship: 0.97 ≤ FB / FG ≤ 1.01. Meeting this conditional equation ensures that the focal lengths of the optical lens at wavelengths B and G are close, achieving confocality between the single wavelengths. Preferably, 0.98 ≤ FB / FG ≤ 1.005.

[0170] In this embodiment, the refractive index Nd1 of the first lens element of the optical lens satisfies: Nd1 ≥ 1.6. The first lens element is preferably made of a high refractive index material, which is beneficial for reducing the front port diameter and improving the imaging quality. Preferably, Nd1 ≥ 1.7.

[0171] In this embodiment, the optical back focus of the optical lens (i.e., the distance BFL from the image-side center of the eighth lens element of the optical lens to the center of the imaging plane) and the total optical length of the optical lens (i.e., the distance TTL from the object-side center of the first lens element of the optical lens to the center of the imaging plane) satisfy the following relationship: BFL / TTL ≥ 0.04. Meeting this conditional equation ensures a guaranteed back focus while achieving miniaturization, facilitating module assembly. Preferably, BFL / TTL ≥ 0.05.

[0172] Optionally, the optical lens may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0173] The optical lens in this application may use multiple lenses, such as the eight lenses mentioned above. This solution focuses on protecting the lens group structure, and is not limited to spherical and aspherical surfaces. If the focus is on resolution quality, all lenses can use aspherical lenses; the material of the lens is not limited to plastic and glass. If the focus is on temperature performance, all lenses can use glass lenses. This application does not specifically limit the specific number of spherical lenses and aspherical lenses. When the focus is on imaging quality, the number of aspherical lenses can be increased. The characteristic of aspherical lenses is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike spherical lenses with constant curvature from the center of the lens to the periphery of the lens, aspherical lenses have better curvature radius characteristics, and have the advantages of improving distortion aberration and improving astigmatism aberration. After using aspherical lenses, the aberrations that occur during imaging can be eliminated as much as possible, thereby improving imaging quality.

[0174] In an exemplary embodiment, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens may all be glass lenses. Optical lenses made of glass can suppress the deviation of the back focus of the optical lens with temperature changes, thereby improving system stability. At the same time, the use of glass material can avoid lens imaging blur caused by high and low temperature changes in the use environment, which affects the normal use of the lens. For example, an optical lens with an all-glass design has a wide temperature range and can maintain stable optical performance in the range of -40°C to 105°C. Specifically, when the focus is on resolution quality and reliability, the first lens to the eighth lens can all be glass aspheric lenses. Of course, in applications where temperature stability requirements are lower, the first lens to the eighth lens in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce production costs. Of course, the first lens to the eighth lens in the optical lens can also be made of a combination of plastic and glass.

[0175] The present application also provides an electronic device comprising the above-described optical lens and an imaging element that converts an optical image formed by the optical lens into an electrical signal. The imaging element may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The electronic device may be an independent imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The electronic device is equipped with the above-described optical lens.

[0176] However, those skilled in the art will appreciate that the number of lenses comprising the optical lens can be varied to achieve the various results and advantages described herein without departing from the technical solutions claimed herein. For example, although eight lenses are described as an example in the embodiments, the optical lens is not limited to eight lenses. If desired, the optical lens can also include other numbers of lenses.

[0177] The following further describes examples of specific surface shapes and parameters of the optical lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0178] It should be noted that any one of the following examples 1 to 12 is applicable to all embodiments of the present application.

[0179] Example 1

[0180] like Figure 1 The figure shows a schematic diagram of the optical lens structure of Example 1.

[0181] like Figure 1 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, an object-side surface S19 of the protective glass, an image-side surface S20 of the protective glass, and an imaging surface IMA.

[0182] The first lens L1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens L2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens L3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens L4 has positive optical power, with its object-side surface S8 being convex and its image-side surface S9 being convex. The fifth lens L5 has positive optical power, with its object-side surface S10 being convex and its image-side surface S11 being convex. The sixth lens L6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The seventh lens L7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens L8 has negative power. Its object-side surface S15 is concave, and its image-side surface S16 is convex. The optical filter L9 includes an object-side surface S17 and an image-side surface S18. Light from an object sequentially passes through surfaces S1 to S20 and is ultimately imaged on the imaging surface IMA.

[0183] In this example, the total effective focal length F of the optical lens is 21.382 mm, the maximum field of view FOV of the optical lens is 32.287°, and the total length TTL of the optical lens is 43.198 mm.

[0184] Table 1 shows the basic structural parameters of the optical lens of Example 1, wherein the units of the curvature radius and thickness / distance are both millimeters (mm).

[0185] Surf Radius Thickness Nd Vd 1 -21.219 2.6000 1.81 22.69 2 -200.000 2.9420 3 34.392 4.4241 2.10 17.02 4 52.759 0.1000 5 25.559 3.3266 1.69 31.08 6 -230.000 0.2180 7 Infinity 2.1943 8 18.789 6.0000 1.44 95.10 9 -25.190 0.2865 10 16.232 3.4363 1.59 68.53 11 -34.340 1.5000 1.85 23.79 12 10.429 1.5017 13 14.760 5.2000 2.10 17.02 14 20.504 4.2050 15 -16.211 1.2407 1.69 31.08 16 -47.924 1.0000 17 Infinity 0.5500 1.52 64.21 18 Infinity 1.7000 19 Infinity 0.5000 1.52 64.21 20 Infinity 0.2719 IMA Infinity

[0186] Table 1

[0187] In Example 1, the object-side surface and the image-side surface of any lens from the first lens L1 to the eighth lens L8 may be aspherical surfaces. The surface shape of each aspherical lens may be defined by, but not limited to, the following aspherical surface formula:

[0188]

[0189] Where x is the distance from the vertex of the aspheric surface at a height h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; conic; A, B, C, D, E, F, and G are all higher-order coefficients. Table 2 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for aspheric lens surfaces S5, S6, S15, and S16 in Example 1.

[0190]

[0191]

[0192] Table 2

[0193] Example 2

[0194] like Figure 2 FIG2 is a schematic diagram of the optical lens structure of Example 2. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted.

[0195] like Figure 2 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, an object-side surface S19 of the protective glass, an image-side surface S20 of the protective glass, and an imaging surface IMA.

[0196] The first lens L1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens L2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens L3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens L4 has positive optical power, with its object-side surface S8 being convex and its image-side surface S9 being convex. The fifth lens L5 has positive optical power, with its object-side surface S10 being convex and its image-side surface S11 being convex. The sixth lens L6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The seventh lens L7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens L8 has negative power. Its object-side surface S15 is concave, and its image-side surface S16 is convex. The optical filter L9 includes an object-side surface S17 and an image-side surface S18. Light from an object sequentially passes through surfaces S1 to S20 and is ultimately imaged on the imaging surface IMA.

[0197] In this example, the total effective focal length F of the optical lens is 21.074 mm, the maximum field of view FOV of the optical lens is 33.016°, and the total length TTL of the optical lens is 42.899 mm.

[0198] Table 3 shows the basic structural parameters of the optical lens of Example 2, wherein the units of the curvature radius and thickness / distance are both millimeters (mm).

[0199]

[0200]

[0201] Table 3

[0202] Table 4 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspheric lens surfaces S5, S6, S15, and S16 in Example 2.

[0203] Higher order terms / 4 6 8 Surf K A B C 5 -2.7 -2.1903E-05 -1.9362E-07 -2.8099E-09 6 200 7.6745E-06 -1.2465E-07 -3.3149E-09 15 5.1 -9.8013E-04 1.9787E-05 -1.4096E-06 16 105 -8.9876E-04 1.0482E-05 1.5904E-07 Higher order terms 10 12 14 16 Surf D E F G 5 3.0174E-11 -7.5992E-13 7.4400E-15 -2.9746E-17 6 6.5662E-11 -1.5042E-12 1.6267E-14 -6.8277E-17 15 9.8110E-08 -4.0399E-09 8.7128E-11 -7.7870E-13 16 -3.0918E-08 1.7785E-09 -4.7809E-11 5.0799E-13

[0204] Table 4

[0205] Example 3

[0206] like Figure 3 , which is a schematic diagram of the optical lens structure of Example 3. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted.

[0207] like Figure 3 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, an object-side surface S19 of the protective glass, an image-side surface S20 of the protective glass, and an imaging surface IMA.

[0208] The first lens L1 has negative optical power, with its object-side surface S1 being concave, and its image-side surface S2 being concave. The second lens L2 has positive optical power, with its object-side surface S3 being convex, and its image-side surface S4 being concave. The third lens L3 has positive optical power, with its object-side surface S5 being convex, and its image-side surface S6 being convex. The fourth lens L4 has positive optical power, with its object-side surface S8 being convex, and its image-side surface S9 being convex. The fifth lens L5 has positive optical power, with its object-side surface S10 being convex, and its image-side surface S11 being convex. The sixth lens L6 has negative optical power, with its object-side surface S11 being concave, and its image-side surface S12 being concave. The seventh lens L7 has positive optical power, with its object-side surface S13 being convex, and its image-side surface S14 being concave. The eighth lens L8 has negative power. Its object-side surface S15 is convex, and its image-side surface S16 is concave. The optical filter L9 includes an object-side surface S17 and an image-side surface S18. Light from an object sequentially passes through surfaces S1 to S20 and is ultimately imaged on the imaging surface IMA.

[0209] In this example, the total effective focal length F of the optical lens is 20.467 mm, the maximum field of view FOV of the optical lens is 33.509°, and the total length TTL of the optical lens is 46.289 mm.

[0210] Table 5 shows the basic structural parameters of the optical lens of Example 3, wherein the units of the curvature radius and thickness / distance are both millimeters (mm).

[0211] Surf Radius Thickness Nd Vd 1 -30.000 1.5000 1.81 22.69 2 46.459 3.7568 3 42.069 4.6339 2.10 17.02 4 108.162 0.1000 5 24.017 3.6969 1.69 31.08 6 -223.826 0.2180 7 Infinity 3.8369 8 20.200 6.0000 1.44 95.10 9 -31.094 0.3081 10 15.000 4.7179 1.59 68.53 11 -24.057 1.5000 1.85 23.79 12 10.000 1.6813 13 14.413 5.2000 2.10 17.02 14 19.000 4.2714 15 100.000 1.5742 1.69 31.08 16 39.500 1.0000 17 Infinity 0.5500 1.52 64.21 18 Infinity 1.1181 19 Infinity 0.5000 1.52 64.21 20 Infinity 0.1250 IMA Infinity

[0212] Table 5

[0213] Table 6 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspheric lens surfaces S5, S6, S15, and S16 in Example 3.

[0214]

[0215]

[0216] Table 6

[0217] Example 4

[0218] like Figure 4 , which is a schematic diagram of the optical lens structure of Example 4. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted.

[0219] like Figure 4 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, an object-side surface S19 of the protective glass, an image-side surface S20 of the protective glass, and an imaging surface IMA.

[0220] The first lens L1 has negative optical power, with its object-side surface S1 being concave, and its image-side surface S2 being concave. The second lens L2 has positive optical power, with its object-side surface S3 being convex, and its image-side surface S4 being concave. The third lens L3 has positive optical power, with its object-side surface S5 being convex, and its image-side surface S6 being convex. The fourth lens L4 has positive optical power, with its object-side surface S8 being convex, and its image-side surface S9 being convex. The fifth lens L5 has positive optical power, with its object-side surface S10 being convex, and its image-side surface S11 being convex. The sixth lens L6 has negative optical power, with its object-side surface S11 being concave, and its image-side surface S12 being concave. The seventh lens L7 has positive optical power, with its object-side surface S13 being convex, and its image-side surface S14 being concave. The eighth lens L8 has negative power. Its object-side surface S15 is convex, and its image-side surface S16 is concave. The optical filter L9 includes an object-side surface S17 and an image-side surface S18. Light from an object sequentially passes through surfaces S1 to S20 and is ultimately imaged on the imaging surface IMA.

[0221] In this example, the total effective focal length F of the optical lens is 20.713 mm, the maximum field of view FOV of the optical lens is 33.196°, and the total length TTL of the optical lens is 47.396 mm.

[0222] Table 7 shows the basic structural parameters of the optical lens of Example 4, where the units of the curvature radius Radius and thickness / distance are both millimeters (mm).

[0223]

[0224]

[0225] Table 7

[0226] Table 8 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspheric lens surfaces S5, S6, S15, and S16 in Example 4.

[0227] Higher order terms / 4 6 8 Surf K A B C 5 -0.19080157 -8.68945E-06 4.49693E-08 -1.74877E-09 6 137 2.07536E-05 7.74506E-08 -2.5633E-09 15 46 -0.000956292 2.03363E-05 -2.84533E-06 16 55 -0.000777767 -7.84995E-06 3.97131E-07 Higher order terms 10 12 14 16 Surf D E F G 5 4.94964E-11 -7.83377E-13 6.07711E-15 -1.88165E-17 6 8.22491E-11 -1.41376E-12 1.21476E-14 -4.16763E-17 15 1.54708E-07 -4.23719E-09 4.46899E-11 -3.28214E-15 16 -3.90102E-08 1.9421E-09 -4.64148E-11 4.17827E-13

[0228] Table 8

[0229] Example 5

[0230] like Figure 5 , which is a schematic diagram of the optical lens structure of Example 5. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted.

[0231] like Figure 5As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, an object-side surface S19 of the protective glass, an image-side surface S20 of the protective glass, and an imaging surface IMA.

[0232] The first lens L1 has negative optical power, with its object-side surface S1 being concave, and its image-side surface S2 being concave. The second lens L2 has positive optical power, with its object-side surface S3 being convex, and its image-side surface S4 being convex. The third lens L3 has positive optical power, with its object-side surface S5 being convex, and its image-side surface S6 being convex. The fourth lens L4 has positive optical power, with its object-side surface S8 being convex, and its image-side surface S9 being convex. The fifth lens L5 has positive optical power, with its object-side surface S10 being convex, and its image-side surface S11 being convex. The sixth lens L6 has negative optical power, with its object-side surface S11 being concave, and its image-side surface S12 being concave. The seventh lens L7 has positive optical power, with its object-side surface S13 being convex, and its image-side surface S14 being concave. The eighth lens L8 has negative power. Its object-side surface S15 is concave, and its image-side surface S16 is convex. The optical filter L9 includes an object-side surface S17 and an image-side surface S18. Light from an object sequentially passes through surfaces S1 to S20 and is ultimately imaged on the imaging surface IMA.

[0233] In this example, the total effective focal length F of the optical lens is 21.205 mm, the maximum field of view FOV of the optical lens is 32.615°, and the total length TTL of the optical lens is 47.996 mm.

[0234] Table 9 shows the basic structural parameters of the optical lens of Example 5, where the units of curvature radius Radius and thickness / distance are both millimeters (mm).

[0235] Surf Radius Thickness Nd Vd 1 -29.473 1.5000 1.81 22.69 2 34.736 2.3959 3 106.267 4.6047 2.10 17.02 4 -150.000 0.1000 5 22.163 4.9884 1.69 31.08 6 -215.000 0.2180 7 Infinity 5.4010 8 17.489 6.0000 1.44 95.10 9 -41.138 0.2865 10 13.754 4.5380 1.59 68.53 11 -31.232 1.5000 1.85 23.79 12 9.174 1.3144 13 13.869 5.2000 2.10 17.02 14 17.366 3.0443 15 -32.262 3.0840 1.69 31.08 16 -50.000 1.0000 17 Infinity 0.5500 1.52 64.21 18 Infinity 1.7000 19 Infinity 0.5000 1.52 64.21 20 Infinity 0.1017 IMA Infinity

[0236] Table 9

[0237] Table 10 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspheric lens surfaces S5, S6, S15, and S16 in Example 5.

[0238]

[0239]

[0240] Table 10

[0241] Example 6

[0242] like Figure 6 , which is a schematic diagram of the optical lens structure of Example 6. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted.

[0243] like Figure 6 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, an object-side surface S19 of the protective glass, an image-side surface S20 of the protective glass, and an imaging surface IMA.

[0244] The first lens L1 has negative optical power, with its object-side surface S1 being concave, and its image-side surface S2 being concave. The second lens L2 has positive optical power, with its object-side surface S3 being convex, and its image-side surface S4 being convex. The third lens L3 has positive optical power, with its object-side surface S5 being convex, and its image-side surface S6 being convex. The fourth lens L4 has positive optical power, with its object-side surface S8 being convex, and its image-side surface S9 being convex. The fifth lens L5 has positive optical power, with its object-side surface S10 being convex, and its image-side surface S11 being convex. The sixth lens L6 has negative optical power, with its object-side surface S11 being concave, and its image-side surface S12 being concave. The seventh lens L7 has positive optical power, with its object-side surface S13 being convex, and its image-side surface S14 being concave. The eighth lens L8 has negative power. Its object-side surface S15 is concave, and its image-side surface S16 is convex. The optical filter L9 includes an object-side surface S17 and an image-side surface S18. Light from an object sequentially passes through surfaces S1 to S20 and is ultimately imaged on the imaging surface IMA.

[0245] In this example, the total effective focal length F of the optical lens is 20.805 mm, the maximum field of view FOV of the optical lens is 33.486°, and the total length TTL of the optical lens is 44.919 mm.

[0246] Table 11 shows the basic structural parameters of the optical lens of Example 6, where the units of curvature radius Radius and thickness / distance are all millimeters (mm).

[0247]

[0248]

[0249] Table 11

[0250] Table 12 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspheric lens surfaces S5, S6, S15, and S16 in Example 6.

[0251] Higher order terms / 4 6 8 Surf K A B C 5 1.1 -1.45865E-05 5.55204E-08 -1.60617E-09 6 -20 2.73465E-05 1.65803E-07 -2.25416E-09 15 -76 -0.001503794 5.92723E-05 -3.76061E-06 16 -200 -0.000535664 -2.46499E-06 5.75729E-07 Higher order terms 10 12 14 16 Surf D E F G 5 5.3944E-11 -7.62611E-13 5.88002E-15 -1.62799E-17 6 9.09984E-11 -1.37421E-12 1.13937E-14 -3.35588E-17 15 1.60127E-07 -3.97059E-09 4.24134E-11 -3.76411E-14 16 -4.60394E-08 1.94369E-09 -4.2025E-11 3.62557E-13

[0252] Table 12

[0253] Example 7

[0254] like Figure 7 FIG2 is a schematic diagram of the optical lens structure of Example 7. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted.

[0255] like Figure 7 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, an object-side surface S19 of the protective glass, an image-side surface S20 of the protective glass, and an imaging surface IMA.

[0256] The first lens L1 has negative optical power, with its object-side surface S1 being concave, and its image-side surface S2 being concave. The second lens L2 has positive optical power, with its object-side surface S3 being convex, and its image-side surface S4 being concave. The third lens L3 has positive optical power, with its object-side surface S5 being convex, and its image-side surface S6 being concave. The fourth lens L4 has positive optical power, with its object-side surface S8 being convex, and its image-side surface S9 being convex. The fifth lens L5 has positive optical power, with its object-side surface S10 being convex, and its image-side surface S11 being convex. The sixth lens L6 has negative optical power, with its object-side surface S11 being concave, and its image-side surface S12 being concave. The seventh lens L7 has positive optical power, with its object-side surface S13 being convex, and its image-side surface S14 being concave. The eighth lens L8 has negative power. Its object-side surface S15 is concave, and its image-side surface S16 is convex. The optical filter L9 includes an object-side surface S17 and an image-side surface S18. Light from an object sequentially passes through surfaces S1 to S20 and is ultimately imaged on the imaging surface IMA.

[0257] In this example, the total effective focal length F of the optical lens is 21.229 mm, the maximum field of view FOV of the optical lens is 32.653°, and the total length TTL of the optical lens is 47.077 mm.

[0258] Table 13 shows the basic structural parameters of the optical lens of Example 7, where the units of curvature radius Radius and thickness / distance are both millimeters (mm).

[0259] Surf Radius Thickness Nd Vd 1 -43.391 2.6000 1.81 22.69 2 32.277 3.2075 3 29.824 5.0000 2.10 17.02 4 68.282 0.1000 5 26.333 2.9643 1.69 31.08 6 160.894 0.2180 7 Infinity 3.5939 8 18.758 6.0000 1.44 95.10 9 -27.390 0.2865 10 12.693 5.2130 1.59 68.53 11 -26.415 1.3696 1.85 23.79 12 8.648 1.3245 13 13.047 5.0489 2.10 17.02 14 16.464 2.5285 15 -34.955 3.7520 1.69 31.08 16 -50.000 1.0000 17 Infinity 0.5500 1.52 64.21 18 Infinity 1.7000 19 Infinity 0.5000 1.52 64.21 20 Infinity 0.1035 IMA Infinity

[0260] Table 13

[0261] Table 14 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspheric lens surfaces S5, S6, S15, and S16 in Example 7.

[0262] Higher order terms / 4 6 8 Surf K A B C 5 -1.755846 -2.7549E-05 -2.0251E-07 -3.7109E-09 6 -200 -5.5443E-06 -1.9198E-07 -4.2152E-09 15 -200 -1.2655E-03 4.4123E-05 -3.6266E-06 16 40.307727 -5.1073E-04 -3.5652E-06 4.8241E-07 Higher order terms 10 12 14 16 Surf D E F G 5 4.2897E-11 -7.3863E-13 6.7775E-15 -2.6052E-17 6 7.7343E-11 -1.3503E-12 1.2951E-14 -5.0269E-17 15 1.6509E-07 -4.1912E-09 3.3028E-11 2.0910E-13 16 -4.4185E-08 1.9838E-09 -4.3080E-11 3.6113E-13

[0263] Table 14

[0264] Example 8

[0265] like Figure 8 FIG2 is a schematic diagram of the optical lens structure of Example 8. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted.

[0266] like Figure 8 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, an object-side surface S19 of the protective glass, an image-side surface S20 of the protective glass, and an imaging surface IMA.

[0267] The first lens L1 has negative optical power, with its object-side surface S1 being concave, and its image-side surface S2 being concave. The second lens L2 has positive optical power, with its object-side surface S3 being convex, and its image-side surface S4 being concave. The third lens L3 has positive optical power, with its object-side surface S5 being convex, and its image-side surface S6 being concave. The fourth lens L4 has positive optical power, with its object-side surface S8 being convex, and its image-side surface S9 being convex. The fifth lens L5 has positive optical power, with its object-side surface S10 being convex, and its image-side surface S11 being convex. The sixth lens L6 has negative optical power, with its object-side surface S11 being concave, and its image-side surface S12 being concave. The seventh lens L7 has positive optical power, with its object-side surface S13 being convex, and its image-side surface S14 being concave. The eighth lens L8 has negative power. Its object-side surface S15 is concave, and its image-side surface S16 is convex. The optical filter L9 includes an object-side surface S17 and an image-side surface S18. Light from an object sequentially passes through surfaces S1 to S20 and is ultimately imaged on the imaging surface IMA.

[0268] In this example, the total effective focal length F of the optical lens is 21.082 mm, the maximum field of view FOV of the optical lens is 32.972°, and the total length TTL of the optical lens is 45.015 mm.

[0269] Table 15 shows the basic structural parameters of the optical lens of Example 8, where the units of curvature radius Radius and thickness / distance are both millimeters (mm).

[0270]

[0271]

[0272] Table 15

[0273] Table 16 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspheric lens surfaces S5, S6, S15, and S16 in Example 8.

[0274] Higher order terms / 4 6 8 Surf K A B C 5 -1.63 -2.5976E-05 -2.02752E-07 -3.59274E-09 6 -30 -1.65589E-06 -1.68994E-07 -4.29175E-09 15 -116 -0.001337252 4.80206E-05 -3.58139E-06 16 23 -0.00047847 -4.79728E-06 5.44697E-07 Higher order terms 10 12 14 16 Surf D E F G 5 4.29468E-11 -7.63134E-13 6.49004E-15 -2.15796E-17 6 7.6887E-11 -1.3471E-12 1.31381E-14 -4.99046E-17 15 1.64637E-07 -4.23317E-09 3.44336E-11 2.72776E-13 16 -4.44584E-08 1.95026E-09 -4.3528E-11 3.84773E-13

[0275] Table 16

[0276] Example 9

[0277] like Figure 9 FIG2 is a schematic diagram of the optical lens structure of Example 9. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted.

[0278] like Figure 9 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, an object-side surface S19 of the protective glass, an image-side surface S20 of the protective glass, and an imaging surface IMA.

[0279] The first lens L1 has negative optical power, with its object-side surface S1 being concave, and its image-side surface S2 being concave. The second lens L2 has positive optical power, with its object-side surface S3 being convex, and its image-side surface S4 being concave. The third lens L3 has positive optical power, with its object-side surface S5 being convex, and its image-side surface S6 being convex. The fourth lens L4 has positive optical power, with its object-side surface S8 being convex, and its image-side surface S9 being convex. The fifth lens L5 has positive optical power, with its object-side surface S10 being convex, and its image-side surface S11 being convex. The sixth lens L6 has negative optical power, with its object-side surface S11 being concave, and its image-side surface S12 being concave. The seventh lens L7 has positive optical power, with its object-side surface S13 being convex, and its image-side surface S14 being convex. The eighth lens L8 has negative power. Its object-side surface S15 is concave, and its image-side surface S16 is concave. The optical filter L9 includes an object-side surface S17 and an image-side surface S18. Light from an object sequentially passes through surfaces S1 to S20 and is ultimately imaged on the imaging surface IMA.

[0280] In this example, the total effective focal length F of the optical lens is 21.163 mm, the maximum field of view FOV of the optical lens is 32.394°, and the total length TTL of the optical lens is 45.301 mm.

[0281] Table 17 shows the basic structural parameters of the optical lens of Example 9, where the units of curvature radius Radius and thickness / distance are both millimeters (mm).

[0282] Surf Radius Thickness Nd Vd 1 -27.251 2.6000 1.81 22.69 2 43.203 2.2595 3 33.303 5.0000 2.10 17.02 4 75.001 0.1000 5 23.119 4.5210 1.69 31.08 6 -215.000 0.2180 7 Infinity 0.8391 8 18.963 6.0000 1.44 95.10 9 -26.132 0.2865 10 26.000 5.9186 1.59 68.53 11 -14.190 1.0000 1.85 23.79 12 21.959 1.3506 13 92.604 4.7486 2.10 17.02 14 -50.000 5.3619 15 -26.699 1.2000 1.69 31.08 16 27.203 1.0000 17 Infinity 0.5500 1.52 64.21 18 Infinity 1.7000 19 Infinity 0.5000 1.52 64.21 20 Infinity 0.1475 IMA Infinity

[0283] Table 18 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspheric lens surfaces S5, S6, S15, and S16 in Example 9.

[0284] Higher order terms / 4 6 8 Surf K A B C 5 -0.4923808 -1.1448E-05 -2.5485E-09 -3.2231E-09 6 -53.208159 3.1028E-05 8.9164E-09 -3.4280E-09 15 -71.184771 -1.8591E-03 5.2711E-05 -2.2104E-06 16 -74.215806 -7.7964E-04 9.2412E-06 5.1987E-07 Higher order terms 10 12 14 16 Surf D E F G 5 5.1443E-11 -7.7049E-13 4.4521E-15 -1.0860E-17 6 7.4352E-11 -1.4606E-12 1.2888E-14 -4.6184E-17 15 1.0955E-07 -4.5676E-09 1.0523E-10 -9.0764E-13 16 -4.9977E-08 2.0357E-09 -4.6470E-11 4.7616E-13

[0285] Table 18

[0286] Example 10

[0287] like Figure 10 FIG2 is a schematic diagram of the optical lens structure of Example 10. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted.

[0288] like Figure 10As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, an object-side surface S19 of the protective glass, an image-side surface S20 of the protective glass, and an imaging surface IMA.

[0289] The first lens L1 has negative optical power, with its object-side surface S1 being concave, and its image-side surface S2 being concave. The second lens L2 has positive optical power, with its object-side surface S3 being convex, and its image-side surface S4 being concave. The third lens L3 has positive optical power, with its object-side surface S5 being convex, and its image-side surface S6 being convex. The fourth lens L4 has positive optical power, with its object-side surface S8 being convex, and its image-side surface S9 being convex. The fifth lens L5 has positive optical power, with its object-side surface S10 being convex, and its image-side surface S11 being convex. The sixth lens L6 has negative optical power, with its object-side surface S11 being concave, and its image-side surface S12 being concave. The seventh lens L7 has positive optical power, with its object-side surface S13 being convex, and its image-side surface S14 being convex. The eighth lens L8 has negative power. Its object-side surface S15 is concave, and its image-side surface S16 is concave. The optical filter L9 includes an object-side surface S17 and an image-side surface S18. Light from an object sequentially passes through surfaces S1 to S20 and is ultimately imaged on the imaging surface IMA.

[0290] In this example, the total effective focal length F of the optical lens is 21.102 mm, the maximum field of view FOV of the optical lens is 32.647°, and the total length TTL of the optical lens is 45.551 mm.

[0291] Table 19 shows the basic structural parameters of the optical lens of Example 10, where the units of curvature radius Radius and thickness / distance are both millimeters (mm).

[0292] Surf Radius Thickness Nd Vd 1 -27.247 2.6000 1.81 22.69 2 43.078 2.2504 3 33.069 4.9953 2.10 17.02 4 73.505 0.1000 5 24.401 4.5527 1.69 31.08 6 -155.497 0.2180 7 Infinity 1.2152 8 18.597 6.0000 1.44 95.10 9 -26.016 0.2820 10 26.500 5.9361 1.59 68.53 11 -15.000 1.0000 1.85 23.79 12 21.791 1.4199 13 74.944 4.6910 2.10 17.02 14 -57.000 5.3110 15 -22.000 1.2000 1.69 31.08 16 33.500 1.0000 17 Infinity 0.5500 1.52 64.21 18 Infinity 1.7000 19 Infinity 0.5000 1.52 64.21 20 Infinity 0.0298 IMA Infinity

[0293] Table 19

[0294] Table 20 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspheric lens surfaces S5, S6, S15, and S16 in Example 10.

[0295] Higher order terms / 4 6 8 Surf K A B C 5 -0.55240606 -1.18366E-05 1.19906E-08 -3.13443E-09 6 -0.97106525 3.04831E-05 2.39793E-08 -3.19246E-09 15 -51.795303 -0.001804983 5.19741E-05 -2.21105E-06 16 -103.17585 -0.000737877 9.18028E-06 5.12531E-07 Higher order terms 10 12 14 16 Surf D E F G 5 5.22751E-11 -7.42413E-13 4.82129E-15 -1.46187E-17 6 7.7198E-11 -1.44096E-12 1.29008E-14 -4.75319E-17 15 1.09866E-07 -4.56816E-09 1.04892E-10 -9.07667E-13 16 -4.98007E-08 2.04075E-09 -4.65369E-11 4.72663E-13

[0296] Table 20

[0297] Example 11

[0298] like Figure 11 FIG2 is a schematic diagram of the optical lens structure of Example 11. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted.

[0299] like Figure 11 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, an object-side surface S19 of the protective glass, an image-side surface S20 of the protective glass, and an imaging surface IMA.

[0300] The first lens L1 has negative optical power, with its object-side surface S1 being concave, and its image-side surface S2 being concave. The second lens L2 has positive optical power, with its object-side surface S3 being convex, and its image-side surface S4 being concave. The third lens L3 has positive optical power, with its object-side surface S5 being convex, and its image-side surface S6 being convex. The fourth lens L4 has positive optical power, with its object-side surface S8 being convex, and its image-side surface S9 being convex. The fifth lens L5 has positive optical power, with its object-side surface S10 being convex, and its image-side surface S11 being convex. The sixth lens L6 has negative optical power, with its object-side surface S11 being concave, and its image-side surface S12 being concave. The seventh lens L7 has positive optical power, with its object-side surface S13 being convex, and its image-side surface S14 being concave. The eighth lens L8 has negative power. Its object-side surface S15 is concave, and its image-side surface S16 is convex. The optical filter L9 includes an object-side surface S17 and an image-side surface S18. Light from an object sequentially passes through surfaces S1 to S20 and is ultimately imaged on the imaging surface IMA.

[0301] In this example, the total effective focal length F of the optical lens is 21.279 mm, the maximum field of view FOV of the optical lens is 32.008°, and the total length TTL of the optical lens is 48.490 mm.

[0302] Table 21 shows the basic structural parameters of the optical lens of Example 11, where the units of curvature radius Radius and thickness / distance are both millimeters (mm).

[0303]

[0304]

[0305] Table 21

[0306] Table 22 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspheric lens surfaces S5, S6, S15, and S16 in Example 11.

[0307] Higher order terms / 4 6 8 Surf K A B C 5 0 -6.45396E-06 5.19752E-08 -1.79302E-09 6 -14 2.64838E-05 8.93446E-08 -2.6151E-09 15 -96 -0.001904028 6.58711E-05 -3.96198E-06 16 77 -0.000818053 1.01346E-06 5.1668E-07 Higher order terms 10 12 14 16 Surf D E F G 5 4.89382E-11 -7.76638E-13 6.22205E-15 -2.0365E-17 6 8.22176E-11 -1.40388E-12 1.22502E-14 -4.32881E-17 15 1.6433E-07 -3.9514E-09 4.03782E-11 0 16 -4.46359E-08 1.95997E-09 -4.32542E-11 3.78404E-13

[0308] Table 22

[0309] Example 12

[0310] like Figure 12 , which is a schematic diagram of the optical lens structure of Example 12. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted.

[0311] like Figure 12 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, an object-side surface S19 of the protective glass, an image-side surface S20 of the protective glass, and an imaging surface IMA.

[0312] The first lens L1 has negative optical power, with its object-side surface S1 being concave, and its image-side surface S2 being concave. The second lens L2 has positive optical power, with its object-side surface S3 being convex, and its image-side surface S4 being concave. The third lens L3 has positive optical power, with its object-side surface S5 being convex, and its image-side surface S6 being convex. The fourth lens L4 has positive optical power, with its object-side surface S8 being convex, and its image-side surface S9 being convex. The fifth lens L5 has positive optical power, with its object-side surface S10 being convex, and its image-side surface S11 being convex. The sixth lens L6 has negative optical power, with its object-side surface S11 being concave, and its image-side surface S12 being concave. The seventh lens L7 has positive optical power, with its object-side surface S13 being convex, and its image-side surface S14 being concave. The eighth lens L8 has negative power. Its object-side surface S15 is concave, and its image-side surface S16 is convex. The optical filter L9 includes an object-side surface S17 and an image-side surface S18. Light from an object sequentially passes through surfaces S1 to S20 and is ultimately imaged on the imaging surface IMA.

[0313] In this example, the total effective focal length F of the optical lens is 21.421 mm, the maximum field of view FOV of the optical lens is 33.061°, and the total length TTL of the optical lens is 47.885 mm.

[0314] Table 23 shows the basic structural parameters of the optical lens of Example 12, where the units of curvature radius Radius and thickness / distance are both millimeters (mm).

[0315] Surf Radius Thickness Nd Vd 1 -25.000 1.5000 1.81 22.69 2 56.412 5.0529 3 45.000 4.5579 2.10 17.02 4 142.570 0.1000 5 24.261 3.8668 1.69 31.08 6 -106.000 0.2180 7 Infinity 2.3574 8 26.298 6.0000 1.44 95.10 9 -23.554 0.2865 10 13.030 4.0982 1.59 68.53 11 -26.086 1.4665 1.85 23.79 12 8.865 1.9720 13 25.000 5.2000 2.10 17.02 14 49.000 5.3005 15 -26.500 2.1982 1.69 31.08 16 -56.000 1.0000 17 Infinity 0.5500 1.52 64.21 18 Infinity 1.5350 19 Infinity 0.5000 1.52 64.21 20 Infinity 0.1250 IMA Infinity

[0316] Table 23

[0317] Table 24 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspheric lens surfaces S5, S6, S15, and S16 in Example 12.

[0318] Higher order terms / 4 6 8 Surf K A B C 5 -0.5 -1.06808E-05 -1.64775E-08 -1.97907E-09 6 -0.06 2.55946E-05 1.81753E-08 -3.09255E-09 15 -138 -0.001020531 6.20181E-05 -4.02092E-06 16 -68 -0.000226099 -8.91461E-06 6.21971E-07 Higher order terms 10 12 14 16 Surf D E F G 5 4.35765E-11 -8.17739E-13 6.21234E-15 -2.30231E-17 6 8.28125E-11 -1.45515E-12 1.11929E-14 -3.69521E-17 15 1.643E-07 -3.80525E-09 3.62463E-11 0 16 -4.73389E-08 1.95314E-09 -4.17861E-11 3.57201E-13

[0319] Table 24 In summary, Examples 1 to 12 respectively satisfy the relationships shown in Table 25.

[0320]

[0321] Table 26 gives the effective focal length F of the optical lenses of Examples 1 to 12, the effective focal length F1 to F6 of each lens, etc. (unit: mm).

[0322]

[0323]

[0324] Table 26

[0325] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0326] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0327] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0328] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An optical lens, characterized in that: The optical lens has eight lenses with optical power, which include the following lenses from the object side to the image side along the optical axis: a first lens having negative optical power and a concave object-side surface; a second lens having positive optical power and a convex object-side surface; a third lens having positive optical power and a convex object-side surface; a fourth lens having positive refractive power, an object-side surface of the fourth lens being convex, and an image-side surface of the fourth lens being convex; a fifth lens having positive optical power, an object-side surface of the fifth lens being convex, and an image-side surface of the fifth lens being convex; a sixth lens having negative optical power, wherein the object-side surface of the sixth lens is concave, and the image-side surface of the sixth lens is concave; a seventh lens having positive optical power and a convex object-side surface; an eighth lens having negative optical power, wherein at least one of the object-side surface and the image-side surface of the eighth lens is concave; The entire focal length F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy the following conditions: 1.45≤F / H≤2; The maximum field of view FOV of the optical lens, the entire focal length value F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following: 55.623≤(FOV*F) / H≤60.

2. The optical lens according to claim 1, wherein: The image-side surface of the first lens is concave.

3. The optical lens according to claim 1, wherein: The image-side surface of the first lens is convex.

4. The optical lens according to claim 1, wherein: The image-side surface of the second lens is concave.

5. The optical lens according to claim 1, wherein: The image-side surface of the second lens is convex.

6. The optical lens according to claim 1, wherein: The image-side surface of the third lens is convex.

7. The optical lens according to claim 1, wherein: The image side surface of the third lens is concave.

8. The optical lens according to claim 1, wherein: The image-side surface of the seventh lens is concave.

9. The optical lens according to claim 1, wherein: The image-side surface of the seventh lens is convex.

10. The optical lens according to claim 1, wherein: The object-side surface of the eighth lens is concave, and the image-side surface of the eighth lens is concave.

11. The optical lens according to claim 1, wherein: The object-side surface of the eighth lens is convex, and the image-side surface of the eighth lens is concave.

12. The optical lens according to claim 1, wherein: The object-side surface of the eighth lens is concave, and the image-side surface of the eighth lens is convex.

13. The optical lens according to claim 1, wherein: The optical lens further includes a stop, which is disposed between the third lens and the fourth lens.

14. The optical lens according to claim 1, wherein: The image side surface of the third lens is aspherical, and the image side surface of the third lens has at least one inflection point; and / or The image-side surface of the eighth lens is aspherical, and the image-side surface of the eighth lens has at least one inflection point.

15. The optical lens according to claim 1, wherein: The third lens and / or the eighth lens are / is an aspherical lens.

16. The optical lens according to claim 1, wherein: The fifth lens and the sixth lens are cemented together to form a cemented lens.

17. The optical lens according to any one of claims 1 to 16, characterized in that: The total optical length of the optical lens, the distance TTL from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens, and the entire focal length value F of the optical lens satisfy the following relationship: 2.02≤TTL / F≤2.

6.

18. The optical lens according to any one of claims 1 to 16, characterized in that: The total optical length of the optical lens, the distance TTL from the center of the object side of the first lens of the optical lens to the center of the imaging surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following conditions: 0.106≤TTL / H / FOV≤0.

124.

19. The optical lens according to any one of claims 1 to 16, characterized in that: A focal length value F5 of the fifth lens of the optical lens and a focal length value F6 of the sixth lens of the optical lens satisfy the following relationship: 1.653≤|F5 / F6|≤2.

079.

20. The optical lens according to any one of claims 1 to 16, characterized in that: The combined focal length value F56 of the fifth lens and the sixth lens of the optical lens satisfies the following relationship with the entire focal length value F of the optical lens group: 1.031≤|F56 / F|≤2.

21. The optical lens according to any one of claims 1 to 16, characterized in that: The entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following relationship: 1.6≤F / ENPD≤1.

8.

22. The optical lens according to any one of claims 1 to 16, wherein: The R value R1 of the object-side surface of the first lens of the optical lens and the focal length value F of the entire group of the optical lens satisfy the following: -2.4≤R1 / F≤-0.

5.

23. The optical lens according to any one of claims 1 to 16, characterized in that: The center thickness d5 of the fifth lens of the optical lens, the center thickness d6 of the sixth lens of the optical lens, the total optical length of the optical lens, and the center distance TTL from the object side center of the first lens of the optical lens to the imaging surface of the optical lens satisfy the following conditions: 0.114≤(d5+d6) / TTL≤0.

18.

24. The optical lens according to any one of claims 1 to 16, characterized in that: A maximum value dn of the center thickness of the second lens, the third lens, the fourth lens, the fifth lens, and the seventh lens of the optical lens and a minimum value dm of the center thickness of the second lens, the third lens, the fourth lens, the fifth lens, and the seventh lens of the optical lens satisfy the following relationship: 1.314≤dn / dm≤2.

024.

25. The optical lens according to any one of claims 1 to 16, characterized in that: The system focal length FR at a wavelength of 656 nm, the system focal length FG at a wavelength of 546 nm, and the system focal length FB at a wavelength of 435 nm satisfy the following relationship: (FR-FB) / FG≤0.

01.

26. The optical lens according to any one of claims 1 to 16, characterized in that: The system focal length FR at a wavelength of 656 nm and the system focal length FG at a wavelength of 546 nm satisfy the following relationship: 0.97≤FR / FG≤1.

01.

27. The optical lens according to any one of claims 1 to 16, characterized in that: The system focal length FG at a wavelength of 546 nm and the system focal length FB at a wavelength of 435 nm satisfy the following relationship: 0.97≤FB / FG≤1.

01.

28. The optical lens according to any one of claims 1 to 16, wherein: The refractive index Nd1 of the first lens of the optical lens satisfies: 1.81≥Nd1≥1.

6.

29. The optical lens according to any one of claims 1 to 16, wherein: The optical back focus of the optical lens, the distance BFL from the center of the image side of the eighth lens of the optical lens to the center of the imaging plane, the total optical length of the optical lens, and the distance TTL from the center of the object side of the first lens of the optical lens to the center of the imaging plane of the optical lens satisfy the following conditions: 0.093≥BFL / TTL≥0.

04.

30. The optical lens according to any one of claims 1 to 16, wherein: The entire focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy the following: 1.55≤F / H≤1.

85.

31. The optical lens according to any one of claims 1 to 16, wherein: The maximum field of view FOV of the optical lens, the entire focal length value F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following: 55.623≤(FOV*F) / H≤57.

835.

32. An electronic device, characterized in that: The optical lens comprises the optical lens according to any one of claims 1 to 31 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images