Optical lens

Abstract

The application provides an optical lens, which comprises seven lenses arranged along an optical axis from an object side to an imaging surface in sequence, wherein the seven lenses are: a first lens with negative optical power, the object side of which is a concave surface; a second lens with positive optical power, the image side of which is a convex surface; a third lens with negative optical power, the object side of which is a concave surface; a fourth lens with positive optical power; a fifth lens with negative optical power, the image side of which is a concave surface; a sixth lens with positive optical power, the object side of which is a convex surface and the image side of which is a convex surface; and a seventh lens with negative optical power. The application realizes the effects of large field of view, large aperture and miniaturization by reasonably matching the lens shapes and optical power combinations of the lenses.

Description

Technical Field

[0001] This invention relates to the field of optical lens technology, and in particular to an optical lens. Background Technology

[0002] As people's demands for driving experience continue to increase, automotive optical lenses are being used more and more in intelligent driving, and the status of automotive optical lenses in the automotive industry is constantly rising.

[0003] The intelligent cockpit, also known as an intelligent vehicle occupant monitoring system (OMS), is designed to ensure not only driver safety but also the safety and passenger experience of those inside the vehicle. Beyond cabin safety, passenger comfort is another crucial aspect of the intelligent cockpit's existence. Currently, intelligent vehicle occupant monitoring systems (OMS) on the market require a wide field of view and high optical performance, thus often employing an all-glass structure and resulting in a large size. This hinders the integration of optical lenses and reduces costs. Summary of the Invention

[0004] In view of the above problems, the purpose of this invention is to provide an optical lens that can solve at least one or more of the above problems.

[0005] To achieve the above objectives, the present invention provides an optical lens comprising seven lenses, arranged sequentially along the optical axis from the object side to the imaging plane: a first lens with negative optical power, the object side of which is concave; a second lens with positive optical power, the image side of which is convex; a third lens with negative optical power, the object side of which is concave; a fourth lens with positive optical power; a fifth lens with negative optical power, the image side of which is concave; a sixth lens with positive optical power, the object side of which is convex, and the image side of which is convex; and a seventh lens with negative optical power.

[0006] In some embodiments, the fifth lens and the sixth lens are cemented together to form a cemented lens.

[0007] In some implementations, the aperture stop is positioned between the third lens and the fourth lens.

[0008] In some implementations, the total optical length (TTL) of the optical lens and the effective focal length (f) of the optical lens satisfy the condition: TTL / f < 6.0.

[0009] In some implementations, the total optical length TTL of the optical lens and the image height IH corresponding to the maximum field of view of the optical lens satisfy the following condition: TTL / IH < 2.8.

[0010] In some implementations, the effective focal length f of the optical lens, the maximum field of view (FOV) of the optical lens, and the image height IH corresponding to the maximum field of view of the optical lens satisfy the following condition: 55.0 < f * FOV / IH < 95.0.

[0011] In some embodiments, the light transmission aperture D1 of the object side of the first lens and the image height IH corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.9 < D1 / IH < 1.8.

[0012] In some implementations, the effective focal length f1 of the first lens and the effective focal length f of the optical lens satisfy: f1 / f < -1.2.

[0013] In some implementations, the effective focal length f3 of the third lens and the effective focal length f of the optical lens satisfy: f3 / f < -1.5.

[0014] In some implementations, the effective focal length f7 of the seventh lens and the effective focal length f of the optical lens satisfy: f7 / f < -0.4.

[0015] In some embodiments, the radius of curvature R1 of the object side of the first lens and the effective focal length f of the optical lens satisfy: R1 / f < -3.5.

[0016] In some embodiments, the radius of curvature R4 of the image side of the second lens and the effective focal length f of the optical lens satisfy: -2.5 < R4 / f < -1.0; the radius of curvature R5 of the object side of the third lens and the effective focal length f of the optical lens satisfy: -10.0 < R5 / f < -0.4.

[0017] In some embodiments, the radius of curvature R4 of the image side of the second lens and the radius of curvature R5 of the object side of the third lens satisfy: 0 < |(R4-R5) / (R4+R5)| < 0.8.

[0018] In some embodiments, the radius of curvature R12 of the image side of the sixth lens and the effective focal length f of the optical lens satisfy: -4.5 < R12 / f < -0.5.

[0019] In some embodiments, the half-aperture sagitta Sag3 of the object-side surface of the second lens and the half-aperture d3 of the object-side surface of the second lens satisfy: -0.18 <Sag3 / d3<-0.02。

[0020] In some embodiments, the image-side half-aperture sagitta Sag4 of the second lens and the image-side half-aperture d4 of the second lens satisfy: -0.25 <Sag4 / d4<-0.05。

[0021] In some embodiments, the sum of the center thicknesses of the first to seventh lenses, ∑CT, satisfies the condition that the total optical length of the optical lens, TTL, is 0.60 < ∑CT / TTL < 0.80.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: The optical lens provided by the present invention uses seven lenses with optical power. By reasonably matching the optical power and surface shape of each lens, the optical lens has a compact structure and good image quality. At the same time, by reasonably setting the aperture position, lens thickness and inter-lens spacing, the optical lens has a large field of view and a large aperture, achieving a balance between a large field of view, a large aperture, miniaturization and high pixel count, which can meet the imaging requirements of automotive lenses. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the optical lens in Embodiment 1 of the present invention.

[0024] Figure 2 This is a field curvature curve diagram of the optical lens in Embodiment 1 of the present invention.

[0025] Figure 3 This is a relative illumination curve of the optical lens in Embodiment 1 of the present invention.

[0026] Figure 4 This is an MTF curve of the optical lens in Embodiment 1 of the present invention.

[0027] Figure 5 This is a schematic diagram of the optical lens structure of Embodiment 2 of the present invention.

[0028] Figure 6 This is a field curvature curve diagram of the optical lens in Embodiment 2 of the present invention.

[0029] Figure 7 This is a relative illumination curve of the optical lens in Embodiment 2 of the present invention.

[0030] Figure 8 This is the MTF curve of the optical lens in Embodiment 2 of the present invention.

[0031] Figure 9 This is a schematic diagram of the optical lens structure of Embodiment 3 of the present invention.

[0032] Figure 10 This is a field curvature curve diagram of the optical lens in Embodiment 3 of the present invention.

[0033] Figure 11 This is a relative illumination curve of the optical lens in Embodiment 3 of the present invention.

[0034] Figure 12 This is an MTF curve of the optical lens in Embodiment 3 of the present invention.

[0035] Figure 13 This is a schematic diagram of the optical lens structure of Embodiment 4 of the present invention.

[0036] Figure 14This is a field curvature curve diagram of the optical lens in Embodiment 4 of the present invention.

[0037] Figure 15 This is a relative illumination curve of the optical lens in Embodiment 4 of the present invention.

[0038] Figure 16 This is the MTF curve of the optical lens in Embodiment 4 of the present invention.

[0039] Figure 17 This is a schematic diagram of the structure of the optical lens in Embodiment 5 of the present invention.

[0040] Figure 18 This is a field curvature curve diagram of the optical lens in Embodiment 5 of the present invention.

[0041] Figure 19 This is a relative illumination curve of the optical lens in Embodiment 5 of the present invention.

[0042] Figure 20 This is the MTF curve of the optical lens in Embodiment 5 of the present invention.

[0043] Figure 21 This is a schematic diagram of the optical lens structure of Embodiment 6 of the present invention.

[0044] Figure 22 This is a field curvature curve diagram of the optical lens in Embodiment 6 of the present invention.

[0045] Figure 23 This is a relative illumination curve of the optical lens in Embodiment 6 of the present invention.

[0046] Figure 24 This is the MTF curve of the optical lens in Embodiment 6 of the present invention.

[0047] Figure 25 This is a schematic diagram of the structure of the optical lens in Embodiment 7 of the present invention.

[0048] Figure 26 This is a field curvature curve diagram of the optical lens in Embodiment 7 of the present invention.

[0049] Figure 27 This is a relative illumination curve of the optical lens in Embodiment 7 of the present invention.

[0050] Figure 28 This is the MTF curve of the optical lens in Embodiment 7 of the present invention.

[0051] Figure 29 This is a schematic diagram of the optical lens structure of Embodiment 8 of the present invention.

[0052] Figure 30 This is a field curvature curve diagram of the optical lens in Embodiment 8 of the present invention.

[0053] Figure 31 This is a relative illumination curve of the optical lens in Embodiment 8 of the present invention.

[0054] Figure 32 This is the MTF curve of the optical lens in Embodiment 8 of the present invention.

[0055] Figure 33 This is a schematic diagram of the structure of the optical lens in Embodiment 9 of the present invention.

[0056] Figure 34 This is a field curvature curve diagram of the optical lens in Embodiment 9 of the present invention.

[0057] Figure 35 This is a relative illumination curve of the optical lens in Embodiment 9 of the present invention.

[0058] Figure 36 This is the MTF curve of the optical lens in Embodiment 9 of the present invention.

[0059] Figure 37 This is a schematic diagram of the structure of the optical lens in Embodiment 10 of the present invention.

[0060] Figure 38 This is a field curvature curve diagram of the optical lens in Embodiment 10 of the present invention.

[0061] Figure 39 This is a relative illumination curve of the optical lens in Embodiment 10 of the present invention.

[0062] Figure 40 This is the MTF curve of the optical lens in Embodiment 10 of the present invention.

[0063] Figure 41 This is a schematic diagram of the structure of the optical lens in Embodiment 11 of the present invention.

[0064] Figure 42 This is a field curvature curve diagram of the optical lens in Embodiment 11 of the present invention.

[0065] Figure 43 This is a relative illumination curve of the optical lens in Embodiment 11 of the present invention.

[0066] Figure 44 This is the MTF curve of the optical lens in Embodiment 11 of the present invention.

[0067] Figure 45 This is a schematic diagram of the structure of the optical lens in Embodiment 12 of the present invention.

[0068] Figure 46 This is a field curvature curve diagram of the optical lens in Embodiment 12 of the present invention.

[0069] Figure 47This is a relative illumination curve of the optical lens in Embodiment 12 of the present invention.

[0070] Figure 48 This is the MTF curve of the optical lens in Embodiment 12 of the present invention. Detailed Implementation

[0071] To better understand the invention, various aspects of the invention will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of embodiments of the invention and are not intended to limit the scope of the invention in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0072] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of the invention, the first lens discussed below may also be referred to as the second lens or the third lens.

[0073] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0074] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0075] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of the invention, the word "may" is used to mean "one or more embodiments of the invention." And the term "exemplary" is intended to refer to an example or illustration.

[0076] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0077] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0078] This invention provides an optical lens, which includes, from the object side to the imaging plane, a first lens, a second lens, a third lens, an aperture stop, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and a filter, and the optical centers of each lens are located on the same straight line.

[0079] In some embodiments, the first lens is configured to have negative optical power and a concave object side, which can reduce the overall length of the lens and help reduce axial and radial astigmatism, making the image clearer and sharper and improving the imaging quality of the optical lens.

[0080] In some embodiments, the second lens is configured to have positive optical power and a concave image side, which can effectively constrain large-angle light rays passing through the first lens, slow down the light turning trend and make it transition smoothly, while balancing the aberrations generated by the first lens and reducing the sensitivity of the optical lens.

[0081] In some implementations, the third lens is configured to have negative optical power and a concave object side, which helps to better control the path and distribution of the light beam, allowing the light to pass through the aperture more evenly and effectively improving the uniformity of the image formed by the optical lens.

[0082] In some implementations, the fourth lens is configured to have positive optical power, which can further converge the light, reduce the light height, and make the light path transition smoothly. At the same time, it can balance the spherical aberration and field curvature generated by the front lens, thereby improving the imaging quality of the optical lens.

[0083] In some embodiments, the fifth lens and the sixth lens can be cemented together to form a cemented lens, which is used to share the chromatic aberration correction of the optical lens and improve the resolution of the optical lens. The fifth lens is configured to have negative optical power and a concave image side, while the sixth lens is configured to have positive optical power and a convex object side and an convex image side. This can converge the light rays emitted from the fourth lens and make them transition smoothly. At the same time, it can correct various aberrations caused by the front lens, reduce the loss of light in each field of view, improve the relative illumination of each field of view, and thus improve the imaging quality of the optical lens.

[0084] In some implementations, the seventh lens is configured to have negative optical power, which is beneficial for increasing the imaging area of ​​the optical lens and improving the imaging quality of the optical lens.

[0085] In some embodiments, an aperture stop can be positioned between the third and fourth lenses to narrow the range of light emitted from the front lens, reduce the aperture of the rear lens, and balance the structure of the front and rear lens groups.

[0086] In some implementations, the aperture value FNO of the optical lens satisfies the following condition: 1.90 < FNO < 2.90. Meeting this range is beneficial for achieving large aperture characteristics, ensuring image clarity even in low-light environments or at night.

[0087] In some implementations, the maximum field of view (FOV) of the optical lens satisfies the following condition: 75° < FOV < 180°. Meeting this range facilitates the achievement of wide-angle characteristics, thereby enabling the acquisition of more scene information and meeting the needs of large-area detection.

[0088] In some implementations, the angle of incidence (CRA) of the principal ray at the maximum field of view of the optical lens on the image plane satisfies: 12° < CRA < 45°. Satisfying this range allows for a larger tolerance range between the CRA of the optical lens and the CRA of the image sensor, improving the adaptability of the optical lens to the image sensor.

[0089] In some implementations, the total optical length (TTL) of the optical lens and the effective focal length (f) of the optical lens satisfy the condition: TTL / f < 6.0. Meeting this range can effectively limit the length and volume of the optical lens, enabling miniaturization of the optical lens.

[0090] In some implementations, the total optical length (TTL) of the optical lens and the image height (IH) corresponding to the maximum field of view of the optical lens satisfy the condition: TTL / IH < 2.8. Meeting this range enables large-area imaging with the optical lens while simultaneously shortening the total optical length, thereby achieving a balance between optical lens miniaturization and large-area imaging, and enhancing market competitiveness.

[0091] In some implementations, the effective focal length f of the optical lens, the maximum field of view (FOV) of the optical lens, and the image height IH corresponding to the maximum field of view of the optical lens satisfy the following condition: 55.0 < f * FOV / IH < 95.0. Meeting this range ensures that the field of view is increased while maintaining the same image plane size, achieving greater distortion, i.e., increasing the angular resolution of the central region.

[0092] In some embodiments, the light-transmitting aperture D1 of the object-side surface of the first lens and the image height IH corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.9 < D1 / IH < 1.8. Satisfying the above range can balance the relationship between the front aperture of the optical lens and the image plane.

[0093] In some embodiments, the effective focal length f1 of the first lens and the effective focal length f of the optical lens satisfy: f1 / f < -1.2. Satisfying this range allows the first lens to have appropriate negative optical power, which helps to make the change in the refraction angle of the incident light more gradual, avoids excessive refraction changes that would produce too many aberrations, and at the same time helps more light to enter the rear lens, increasing the field of view of the optical lens and improving the relative illumination of the optical lens.

[0094] In some embodiments, the effective focal length f3 of the third lens and the effective focal length f of the optical lens satisfy the condition: f3 / f < -1.5. Satisfying this range allows the third lens to have appropriate negative optical power, which is beneficial for expanding the effective field of view of the optical lens, allowing more light to enter the optical lens, while better controlling the path and distribution of the light beam, making the light pass through the aperture more uniformly, and effectively improving the uniformity of the image formed by the optical lens.

[0095] In some embodiments, the effective focal length f7 of the seventh lens and the effective focal length f of the optical lens satisfy: f7 / f < -0.4. Satisfying this range allows the seventh lens to have appropriate negative optical power, which is beneficial for increasing the incident angle of light entering the imaging plane, further increasing the imaging area of ​​the optical lens, and realizing large target surface imaging of the optical lens.

[0096] In some embodiments, the radius of curvature R1 of the side surface of the first lens and the effective focal length f of the optical lens satisfy: R1 / f < -3.5. Satisfying the above range can effectively control the surface curvature of the side surface of the first lens, increase the field of view while controlling the front diameter of the optical lens, and also benefit the overall length of the optical lens.

[0097] In some embodiments, the radius of curvature R4 of the image side surface of the second lens and the effective focal length f of the optical lens satisfy: -2.5 < R4 / f < -1.0; the radius of curvature R5 of the object side surface of the third lens and the effective focal length f of the optical lens satisfy: -10.0 < R5 / f < -0.4. Meeting the above ranges can not only improve the light transmission efficiency, but also reduce the lens sensitivity, which is beneficial to improving the production yield.

[0098] In some embodiments, the radius of curvature R4 of the image side surface of the second lens and the radius of curvature R5 of the object side surface of the third lens satisfy: 0 < |(R4 - R5) / (R4 + R5)| < 0.8. Meeting the above range can enable the light to be better converged while avoiding problems such as difficult processing caused by overly curved surface shapes of the second lens and the third lens, and can effectively improve the yield of the optical lens.

[0099] In some embodiments, the radius of curvature R12 of the image side surface of the sixth lens and the effective focal length f of the optical lens satisfy: -4.5 < R12 / f < -0.5. Meeting the above range can improve the relative illumination and imaging clarity of the light on the imaging surface finally.

[0100] In some embodiments, the sagittal height Sag3 of the clear aperture radius of the object side surface of the second lens and the clear aperture radius d3 of the object side surface of the second lens satisfy: -0.18 < Sag3 / d3 < -0.02. Meeting the above range is beneficial to controlling a relatively small included angle of the object side surface of the second lens, being able to highlight the detail information of the central field of view of the optical lens, and improving the imaging quality of the optical lens.

[0101] In some embodiments, the sagittal height Sag4 of the clear aperture radius of the image side surface of the second lens and the clear aperture radius d4 of the image side surface of the second lens satisfy: -0.25 < Sag4 / d4 < -0.05. Meeting the above range can make the object side surface and the image side surface of the second lens adopt an approximately concentric circle structure, which can optimize the field curvature and improve the imaging quality of the optical lens.

[0102] In some embodiments, the sum ∑CT of the central thicknesses of each of the first lens to the seventh lens and the total optical length TTL of the optical lens satisfy: 0.60 < ∑CT / TTL < 0.80. Meeting the above range is beneficial to compressing the total length and volume of the optical lens and maintaining the miniaturization of the optical lens.

[0103] As an embodiment, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens can adopt all-plastic lenses, or can adopt a combination of glass and plastic, and both can achieve good imaging effects. In this application, in order to further reduce the production cost and improve the imaging quality, a structure of seven all-plastic lenses is adopted.

[0104] In one implementation, at least one of the object-side or image-side surfaces of the first, second, third, fifth, sixth, and seventh lenses is aspherical. Aspherical lenses are characterized by a continuously changing curvature from the lens center to the lens periphery. Unlike spherical lenses, which have a constant curvature from the lens center to the lens periphery, aspherical lenses possess superior curvature radius characteristics, offering advantages in improving distortion and astigmatism. By employing aspherical lenses, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality.

[0105] To achieve better optical performance, the lens employs multiple aspherical lenses, and the shapes of each aspherical surface of the optical lens satisfy the following equation:

[0106]

[0107] Where z is the distance between the surface and the vertex of the surface in the direction of the optical axis, h is the distance from the optical axis to the surface, c is the curvature of the vertex of the surface, K is the quadratic surface coefficient, and A, B, C, D, E, F, and G are the second, fourth, sixth, eighth, tenth, twelfth, and fourteenth order surface coefficients, respectively.

[0108] The present invention will be further described below with reference to several embodiments. In each embodiment, the thickness, radius of curvature, and material selection of each lens in the optical lens are different; for specific differences, please refer to the parameter tables of each embodiment. The following embodiments are merely preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the following embodiments. Any changes, substitutions, combinations, or simplifications made without departing from the innovative points of the present invention should be considered equivalent substitutions and are included within the protection scope of the present invention.

[0109] Example 1

[0110] Please see Figure 1 The diagram shows a schematic of the structure of an optical lens provided in Embodiment 1 of the present invention. The optical lens includes, along the optical axis from the object side to the imaging plane S17, the following components in sequence: a first lens L1, a second lens L2, a third lens L3, an aperture ST, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter G1.

[0111] Among them, the first lens L1 is a plastic aspherical lens with negative optical power, its object-side surface S1 is concave, and its image-side surface S2 is concave; the second lens L2 is a plastic aspherical lens with positive optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex; the third lens L3 is a plastic aspherical lens with negative optical power, its object-side surface S5 is concave, and its image-side surface S6 is convex; the fourth lens L4 is a plastic aspherical lens with positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex; the fifth lens L5... The first lens is a plastic aspherical lens with negative optical power, whose object-side surface S9 is concave and image-side surface is concave; the sixth lens L6 is a plastic aspherical lens with positive optical power, whose object-side surface S11 is convex, and the fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens, with the cementing surface being S10; the seventh lens L7 is a plastic aspherical lens with negative optical power, whose object-side surface S12 is convex and image-side surface S13 is concave; the filter G1 has object-side surface S14 and image-side surface S15 both being planar.

[0112] The relevant parameters of each lens in the optical lens of Example 1 are shown in Table 1-1.

[0113] Table 1-1

[0114]

[0115] The surface coefficients of the aspherical lens in the optical lens of Example 1 are shown in Table 1-2.

[0116] Table 1-2

[0117]

[0118]

[0119] Figure 2 The field curvature curve of Example 1 is shown, which represents the degree of curvature of light of different wavelengths in the meridional and sagittal image planes. The horizontal axis represents the offset (unit: mm), and the vertical axis represents the half field of view (unit: °). As can be seen from the figure, the field curvature of the meridional and sagittal image planes is controlled within ±0.08 mm, indicating that the optical lens can effectively correct the field curvature.

[0120] Figure 3 The relative illumination curve of Example 1 is shown, which represents the relative illumination value at different field-of-view angles on the imaging plane. The horizontal axis represents the half-field angle (unit: °), and the vertical axis represents the relative illumination (unit: %). As can be seen from the figure, the relative illumination value of the optical lens is still greater than 60% at the maximum half-field angle, indicating that the optical lens has good relative illumination.

[0121] Figure 4The modulation transfer function (MTF) curve of Example 1 is shown, which represents the lens imaging modulation at different spatial frequencies in each field of view. The horizontal axis represents the spatial frequency (unit: lp / mm), and the vertical axis represents the MTF value. As can be seen from the figure, the MTF value of this example is above 0.3 throughout the entire field of view. In the range of 0 to 160 lp / mm, the MTF curve decreases smoothly and evenly from the center to the edge of the field of view, exhibiting good imaging quality and good detail resolution at both low and high frequencies.

[0122] Example 2

[0123] Please see Figure 5 The figure shows a schematic diagram of the structure of the optical lens provided in Embodiment 2 of the present invention. The structure of the optical lens in this embodiment is roughly the same as that of the optical lens in Embodiment 1 above. The main difference is that the curvature radius, aspherical coefficient, thickness and other properties of each lens surface are different.

[0124] The relevant parameters of each lens in the optical lens of Example 2 are shown in Table 2-1.

[0125] Table 2-1

[0126]

[0127] The surface coefficients of the aspherical lens in the optical lens of Example 2 are shown in Table 2-2.

[0128] Table 2-2

[0129]

[0130]

[0131] Figures 6 to 8 The field curvature curve, relative illumination curve, and modulation transfer function (MTF) curve for Example 2 are shown respectively. As can be seen from the figures, the field curvature of the meridional and sagittal image planes is controlled within ±0.04 mm, indicating that the optical lens can correct field curvature very well. At the maximum half-field angle, the relative illumination value of the optical lens is still greater than 50%, indicating that the optical lens has good relative illumination. The MTF value of the optical lens is above 0.2 throughout the entire field of view. Within the range of 0–160 lp / mm, the MTF curve decreases smoothly and evenly from the center to the edge of the field of view, demonstrating good imaging quality and good detail resolution at both low and high frequencies.

[0132] Example 3

[0133] Please see Figure 9The figure shows a schematic diagram of the structure of the optical lens provided in Embodiment 3 of the present invention. The structure of the optical lens in this embodiment is roughly the same as that of the optical lens in Embodiment 1 above. The main difference is that the curvature radius, aspherical coefficient, thickness and other properties of each lens surface are different.

[0134] The relevant parameters of each lens in the optical lens of Example 3 are shown in Table 3-1.

[0135] Table 3-1

[0136]

[0137]

[0138] The surface coefficients of the aspherical lens in Example 3 are shown in Table 3-2.

[0139] Table 3-2

[0140] Face number K A B C S1 1.26E+01 0.00E+00 -3.13E-04 -1.38E-04 S2 -3.89E+01 0.00E+00 3.52E-03 2.48E-04 S3 -8.60E+01 0.00E+00 -7.83E-03 3.12E-04 S4 3.31E+00 0.00E+00 2.70E-02 -1.51E-02 S5 -2.93E+01 0.00E+00 1.43E-02 4.30E-03 S6 -6.61E+01 0.00E+00 -3.84E-02 1.55E-02 S7 3.59E-01 0.00E+00 -7.22E-02 -2.07E-02 S8 1.00E+02 0.00E+00 -5.01E-02 -2.64E-02 S9 8.26E+01 0.00E+00 -1.06E-02 -2.89E-03 S10 -1.09E+01 0.00E+00 8.38E-02 -3.88E-02 S11 -4.59E+00 0.00E+00 -4.91E-03 2.00E-03 S12 -1.69E+00 0.00E+00 -3.01E-02 5.14E-03 S13 1.36E+00 0.00E+00 -4.63E-02 3.67E-03 Face number D E F G S1 7.65E-06 1.33E-06 -3.01E-08 S2 -3.73E-04 6.00E-05 -1.65E-06 S3 -5.74E-04 1.72E-04 -1.58E-05 S4 1.47E-02 -3.42E-03 1.48E-04 S5 6.37E-03 3.70E-04 6.38E-04 S6 3.38E-03 -3.75E-04 2.90E-04 S7 -3.10E-02 3.22E-02 -1.43E-02 S8 -1.08E-02 -4.23E-03 6.88E-03 S9 1.14E-03 1.41E-03 2.55E-03 S10 2.98E-03 3.91E-03 -5.36E-04 S11 5.61E-04 1.94E-04 2.78E-05 S12 1.36E-04 1.07E-04 -4.45E-05 -1.92E-05 S13 -3.12E-05 -1.20E-05 -1.47E-05 4.87E-07

[0141] Figures 10 to 12 The field curvature curve, relative illumination curve, and modulation transfer function (MTF) curve of Example 3 are shown respectively. As can be seen from the figures, the field curvature of the meridional and sagittal image planes is controlled within ±0.2 mm, indicating that the optical lens can effectively correct field curvature. At the maximum half-field angle, the relative illumination value of the optical lens is still greater than 40%, indicating that the optical lens has good relative illumination. The MTF value of the optical lens is above 0.2 throughout the entire field of view. Within the range of 0–160 lp / mm, the MTF curve decreases smoothly and evenly from the center to the edge of the field of view, demonstrating good imaging quality and good detail resolution at both low and high frequencies.

[0142] Example 4

[0143] Please see Figure 13 The figure shows a schematic diagram of the structure of the optical lens provided in Embodiment 4 of the present invention. The structure of the optical lens in this embodiment is roughly the same as that of the optical lens in Embodiment 1 above. The main difference is that the curvature radius, aspherical coefficient, thickness and other properties of each lens surface are different.

[0144] The relevant parameters of each lens in the optical lens of Example 4 are shown in Table 4-1.

[0145] Table 4-1

[0146]

[0147] The surface coefficients of the aspherical lens in Example 4 are shown in Table 4-2.

[0148] Table 4-2

[0149]

[0150]

[0151] Figures 14 to 16 The field curvature curve, relative illumination curve, and modulation transfer function (MTF) curve of Example 4 are shown respectively. As can be seen from the figures, the field curvature of the meridional and sagittal image planes is controlled within ±0.06 mm, indicating that the optical lens can effectively correct field curvature. At the maximum half-field angle, the relative illumination value of the optical lens is still greater than 50%, indicating that the optical lens has good relative illumination. The MTF value of the optical lens is above 0.3 throughout the entire field of view. Within the range of 0–160 lp / mm, the MTF curve decreases smoothly and evenly from the center to the edge of the field of view, demonstrating good imaging quality and good detail resolution at both low and high frequencies.

[0152] Example 5

[0153] Please see Figure 17 The figure shows a schematic diagram of the structure of the optical lens provided in Embodiment 5 of the present invention. The structure of the optical lens in this embodiment is roughly the same as that of the optical lens in Embodiment 1 above. The main difference is that the curvature radius, aspherical coefficient, thickness and other properties of each lens surface are different.

[0154] The relevant parameters of each lens in the optical lens of Example 5 are shown in Table 5-1.

[0155] Table 5-1

[0156]

[0157]

[0158] The surface coefficients of the aspherical lens in Example 5 are shown in Table 5-2.

[0159] Table 5-2

[0160]

[0161]

[0162] Figures 18 to 20The field curvature curve, relative illumination curve, and modulation transfer function (MTF) curve of Example 5 are shown respectively. As can be seen from the figures, the field curvature of the meridional and sagittal image planes is controlled within ±0.06 mm, indicating that the optical lens can effectively correct field curvature. At the maximum half-field angle, the relative illumination value of the optical lens is still greater than 70%, indicating that the optical lens has excellent relative illumination. The MTF value of the optical lens is above 0.3 throughout the entire field of view. Within the range of 0–160 lp / mm, the MTF curve decreases smoothly and uniformly from the center to the edge of the field of view, demonstrating good imaging quality and good detail resolution at both low and high frequencies.

[0163] Example 6

[0164] Please see Figure 21 The figure shows a schematic diagram of the structure of the optical lens provided in Embodiment 6 of the present invention. The structure of the optical lens in this embodiment is roughly the same as that of the optical lens in Embodiment 1 above. The main difference is that the curvature radius, aspherical coefficient, thickness and other properties of each lens surface are different.

[0165] The relevant parameters of each lens in the optical lens of Example 6 are shown in Table 6-1.

[0166] Table 6-1

[0167]

[0168] The surface coefficients of the aspherical lens in the optical lens of Example 6 are shown in Table 6-2.

[0169] Table 6-2

[0170] Face number K A B C S1 -6.88E+01 0.00E+00 1.45E-03 -2.50E-05 S2 -6.29E-01 0.00E+00 1.37E-02 4.27E-04 S3 1.00E+02 0.00E+00 -2.76E-02 -8.30E-04 S4 5.52E+00 0.00E+00 1.13E-02 -1.36E-02 S5 -1.01E+01 0.00E+00 2.79E-03 -9.38E-04 S6 -9.30E+01 0.00E+00 -1.92E-02 1.42E-02 S7 1.57E+00 0.00E+00 -6.91E-02 6.27E-03 S8 -4.34E+00 0.00E+00 -2.15E-02 -9.25E-04 S9 6.02E+01 0.00E+00 4.93E-03 -3.02E-03 S10 6.35E-01 0.00E+00 1.02E-02 3.34E-03 S11 -7.74E+00 0.00E+00 -1.99E-03 1.87E-03 S12 1.58E+00 0.00E+00 -2.94E-02 3.53E-03 S13 -5.44E+00 0.00E+00 -1.45E-02 1.86E-03 Face number D E F G S1 -1.25E-07 -1.16E-08 -3.98E-10 S2 -1.15E-04 3.79E-04 5.18E-05 S3 2.26E-04 3.55E-04 -6.66E-05 S4 1.22E-02 -3.53E-03 4.77E-04 S5 4.49E-03 -1.32E-03 2.09E-04 S6 -2.35E-04 -3.03E-03 1.27E-03 S7 -6.13E-03 1.50E-03 -7.87E-04 S8 -2.79E-03 2.41E-03 -8.00E-04 S9 1.35E-03 8.19E-05 -9.76E-05 S10 -5.88E-04 3.69E-04 -1.27E-04 S11 3.82E-05 -3.28E-05 3.71E-06 S12 -4.10E-04 5.15E-05 -3.08E-06 2.42E-09 S13 -2.70E-04 3.80E-05 -4.23E-06 1.64E-07

[0171] Figures 22 to 24 The field curvature curve, relative illumination curve, and modulation transfer function (MTF) curve of Example 6 are shown respectively. As can be seen from the figures, the field curvature of the meridional and sagittal image planes is controlled within ±0.1 mm, indicating that the optical lens can effectively correct field curvature. At the maximum half-field angle, the relative illumination value of the optical lens is still greater than 70%, indicating that the optical lens has excellent relative illumination. The MTF value of the optical lens is above 0.1 throughout the entire field of view. Within the range of 0–160 lp / mm, the MTF curve decreases smoothly and uniformly from the center to the edge of the field of view, demonstrating good imaging quality and good detail resolution at both low and high frequencies.

[0172] Example 7

[0173] Please see Figure 25The figure shows a schematic diagram of the structure of the optical lens provided in Embodiment 7 of the present invention. The structure of the optical lens in this embodiment is roughly the same as that of the optical lens in Embodiment 1 above. The main difference is that the curvature radius, aspherical coefficient, thickness and other properties of each lens surface are different.

[0174] The relevant parameters of each lens in the optical lens of Example 7 are shown in Table 7-1.

[0175] Table 7-1

[0176]

[0177] The surface coefficients of the aspherical lens in the optical lens of Example 7 are shown in Table 7-2.

[0178] Table 7-2

[0179]

[0180]

[0181] Figures 26 to 28 The field curvature curve, relative illumination curve, and modulation transfer function (MTF) curve of Example 7 are shown respectively. As can be seen from the figures, the field curvature of the meridional and sagittal image planes is controlled within ±0.12 mm, indicating that the optical lens can effectively correct field curvature. At the maximum half-field angle, the relative illumination value of the optical lens is still greater than 70%, indicating that the optical lens has excellent relative illumination. The MTF value of the optical lens is above 0.2 throughout the entire field of view. Within the range of 0–160 lp / mm, the MTF curve decreases smoothly and evenly from the center to the edge of the field of view, demonstrating good imaging quality and good detail resolution at both low and high frequencies.

[0182] Example 8

[0183] Please see Figure 29 The figure shows a schematic diagram of the structure of the optical lens provided in Embodiment 8 of the present invention. The structure of the optical lens in this embodiment is roughly the same as that of the optical lens in Embodiment 1 above. The main difference is that the curvature radius, aspherical coefficient, thickness and other properties of each lens surface are different.

[0184] The relevant parameters of each lens in the optical lens of Example 8 are shown in Table 8-1.

[0185] Table 8-1

[0186]

[0187]

[0188] The surface coefficients of the aspherical lens in the optical lens of Example 8 are shown in Table 8-2.

[0189] Table 8-2

[0190] Face number K A B C S1 -5.33E+01 0.00E+00 1.53E-03 -1.51E-04 S2 -4.11E+00 0.00E+00 4.27E-03 6.61E-04 S3 -4.04E+01 0.00E+00 -1.31E-02 7.92E-04 S4 3.21E+00 0.00E+00 1.66E-02 -1.45E-02 S5 -8.66E+00 0.00E+00 -1.22E-02 2.72E-03 S6 -1.42E+02 0.00E+00 -2.07E-02 1.18E-02 S7 1.40E+00 0.00E+00 -6.70E-02 -4.86E-04 S8 -3.99E+00 0.00E+00 -1.88E-02 1.99E-03 S9 1.00E+02 0.00E+00 5.64E-03 -8.98E-04 S10 4.84E-02 0.00E+00 2.62E-02 -6.52E-03 S11 -4.34E+00 0.00E+00 -5.17E-03 8.67E-04 S12 -3.33E+00 0.00E+00 -3.31E-02 4.95E-03 S13 -1.48E+02 0.00E+00 -2.25E-02 1.69E-03 Face number D E F G S1 4.52E-06 1.15E-06 -8.21E-08 S2 -2.48E-04 5.22E-05 -2.99E-06 S3 -5.90E-04 1.96E-04 -1.94E-05 S4 1.24E-02 -3.58E-03 4.13E-04 S5 5.32E-03 -2.02E-03 6.35E-05 S6 1.50E-04 -8.28E-04 -4.28E-04 S7 -6.15E-03 2.39E-03 -1.33E-03 S8 -3.64E-03 1.17E-03 -3.60E-04 S9 6.29E-04 -4.15E-05 -3.40E-06 S10 1.11E-03 3.07E-04 -4.99E-05 S11 2.71E-04 5.30E-05 -5.98E-06 S12 -2.47E-04 4.48E-05 -1.29E-05 8.45E-07 S13 -2.60E-04 4.67E-05 -3.54E-06 -5.72E-08

[0191] Figures 30 to 32 The field curvature curve, relative illumination curve, and modulation transfer function (MTF) curve of Example 8 are shown respectively. As can be seen from the figures, the field curvature of the meridional and sagittal image planes is controlled within ±0.4 mm, indicating that the optical lens can effectively correct field curvature. At the maximum half-field angle, the relative illumination value of the optical lens is still greater than 60%, indicating that the optical lens has good relative illumination. The MTF value of the optical lens is above 0.2 throughout the entire field of view. Within the range of 0–160 lp / mm, the MTF curve decreases smoothly and evenly from the center to the edge of the field of view, demonstrating good imaging quality and good detail resolution at both low and high frequencies.

[0192] Example 9

[0193] Please see Figure 33 The figure shows a schematic diagram of the structure of the optical lens provided in Embodiment 9 of the present invention. The structure of the optical lens in this embodiment is roughly the same as that of the optical lens in Embodiment 1 above. The main difference is that the curvature radius, aspherical coefficient, thickness and other properties of each lens surface are different.

[0194] The relevant parameters of each lens in the optical lens of Example 9 are shown in Table 9-1.

[0195] Table 9-1

[0196]

[0197] The surface coefficients of the aspherical lens in the optical lens of Example 9 are shown in Table 9-2.

[0198] Table 9-2

[0199]

[0200]

[0201] Figures 34 to 36The field curvature curve, relative illumination curve, and modulation transfer function (MTF) curve of Example 9 are shown respectively. As can be seen from the figures, the field curvature of the meridional and sagittal image planes is controlled within ±0.1 mm, indicating that the optical lens can effectively correct field curvature. At the maximum half-field angle, the relative illumination value of the optical lens is still greater than 60%, indicating that the optical lens has good relative illumination. The MTF value of the optical lens is above 0.3 throughout the entire field of view. Within the range of 0–160 lp / mm, the MTF curve decreases smoothly and evenly from the center to the edge of the field of view, demonstrating good imaging quality and good detail resolution at both low and high frequencies.

[0202] Example 10

[0203] Please see Figure 37 The figure shows a schematic diagram of the structure of the optical lens provided in Embodiment 10 of the present invention. The structure of the optical lens in this embodiment is roughly the same as that of the optical lens in Embodiment 1 above. The main difference is that the curvature radius, aspherical coefficient, thickness and other properties of each lens surface are different.

[0204] The relevant parameters of each lens in the optical lens of Example 10 are shown in Table 10-1.

[0205] Table 10-1

[0206]

[0207]

[0208] The surface coefficients of the aspherical lens in the optical lens of Example 10 are shown in Table 10-2.

[0209] Table 10-2

[0210] Face number K A B C S1 9.97E+01 0.00E+00 1.16E-03 -1.64E-04 S2 -2.74E+00 0.00E+00 4.67E-03 6.40E-04 S3 -6.33E+01 0.00E+00 -1.26E-02 7.37E-04 S4 3.10E+00 0.00E+00 1.67E-02 -1.43E-02 S5 -8.68E+00 0.00E+00 -1.24E-02 2.66E-03 S6 -1.41E+02 0.00E+00 -2.09E-02 1.17E-02 S7 1.38E+00 0.00E+00 -6.68E-02 -3.53E-04 S8 -4.73E+00 0.00E+00 -1.84E-02 1.75E-03 S9 -7.10E+01 0.00E+00 5.68E-03 -8.41E-04 S10 3.19E-02 0.00E+00 2.49E-02 -6.76E-03 S11 -3.54E+00 0.00E+00 -5.26E-03 1.06E-03 S12 -2.81E+00 0.00E+00 -3.33E-02 4.85E-03 S13 -9.18E+01 0.00E+00 -2.31E-02 1.61E-03 Face number D E F G S1 4.03E-06 1.17E-06 -7.24E-08 S2 -2.60E-04 5.16E-05 -2.53E-06 S3 -5.83E-04 1.99E-04 -1.82E-05 S4 1.24E-02 -3.56E-03 4.22E-04 S5 5.38E-03 -1.96E-03 7.74E-05 S6 1.11E-04 -8.94E-04 -4.90E-04 S7 -6.12E-03 2.41E-03 -1.35E-03 S8 -3.71E-03 1.18E-03 -3.29E-04 S9 6.58E-04 -4.38E-05 -1.60E-06 S10 1.19E-03 3.17E-04 -4.97E-05 S11 2.81E-04 5.27E-05 -6.68E-06 S12 -2.82E-04 3.82E-05 -1.37E-05 8.79E-07 S13 -2.65E-04 4.74E-05 -3.36E-06 -2.30E-08

[0211] Figures 38 to 40 The field curvature curve, relative illumination curve, and modulation transfer function (MTF) curve of Example 10 are shown respectively. As can be seen from the figures, the field curvature of the meridional and sagittal image planes is controlled within ±0.3 mm, indicating that the optical lens can effectively correct field curvature. At the maximum half-field angle, the relative illumination value of the optical lens is still greater than 60%, indicating that the optical lens has good relative illumination. The MTF value of the optical lens is above 0.3 throughout the entire field of view. Within the range of 0–160 lp / mm, the MTF curve decreases smoothly and evenly from the center to the edge of the field of view, demonstrating good imaging quality and good detail resolution at both low and high frequencies.

[0212] Example 11

[0213] Please see Figure 41 The figure shows a schematic diagram of the structure of the optical lens provided in Embodiment 11 of the present invention. The structure of the optical lens in this embodiment is roughly the same as that of the optical lens in Embodiment 1 above. The main difference is that the curvature radius, aspherical coefficient, thickness and other properties of each lens surface are different.

[0214] The relevant parameters of each lens in the optical lens of Example 11 are shown in Table 11-1.

[0215] Table 11-1

[0216]

[0217] The surface coefficients of the aspherical lens in the optical lens of Example 11 are shown in Table 11-2.

[0218] Table 11-2

[0219]

[0220]

[0221] Figures 41 to 42 The field curvature curve, relative illumination curve, and modulation transfer function (MTF) curve of Example 11 are shown respectively. As can be seen from the figures, the field curvature of the meridional and sagittal image planes is controlled within ±0.08 mm, indicating that the optical lens can effectively correct field curvature. At the maximum half-field angle, the relative illumination value of the optical lens is still greater than 40%, indicating that the optical lens has good relative illumination. The MTF value of the optical lens is above 0.2 throughout the entire field of view. Within the range of 0–160 lp / mm, the MTF curve decreases smoothly and evenly from the center to the edge of the field of view, demonstrating good imaging quality and good detail resolution at both low and high frequencies.

[0222] Example 12

[0223] Please see Figure 43 The figure shows a schematic diagram of the structure of the optical lens provided in Embodiment 12 of the present invention. The structure of the optical lens in this embodiment is roughly the same as that of the optical lens in Embodiment 1 above. The main difference is that the curvature radius, aspherical coefficient, thickness and other properties of each lens surface are different.

[0224] The relevant parameters of each lens in the optical lens of Example 12 are shown in Table 12-1.

[0225] Table 12-1

[0226]

[0227]

[0228] The surface coefficients of the aspherical lens in the optical lens of Example 12 are shown in Table 12-2.

[0229] Table 12-2

[0230]

[0231]

[0232] Figures 44 to 48 The field curvature curve, relative illumination curve, and modulation transfer function (MTF) curve of Example 12 are shown respectively. As can be seen from the figures, the field curvature of the meridional and sagittal image planes is controlled within ±0.2 mm, indicating that the optical lens can effectively correct field curvature. At the maximum half-field angle, the relative illumination value of the optical lens is still greater than 40%, indicating that the optical lens has good relative illumination. The MTF value of the optical lens is above 0.2 throughout the entire field of view. Within the range of 0–160 lp / mm, the MTF curve decreases smoothly and evenly from the center to the edge of the field of view, demonstrating good imaging quality and good detail resolution at both low and high frequencies.

[0233] Please refer to Table 13, which shows the optical characteristics corresponding to the twelve embodiments above, including the effective focal length f of the optical lens, the maximum field of view FOV, the entrance pupil diameter EPD, the total optical length TTL, the aperture value FNO, the image height IH corresponding to the maximum field of view, the incident angle CRA of the principal ray of the maximum field of view on the image plane, and the values ​​corresponding to each conditional expression in each embodiment.

[0234] Table 13

[0235]

[0236]

[0237] Continued from Table 13

[0238] Parameters and conditional expressions Example 7 Example 8 Example 9 Example 10 Example 11 Example 12 f(mm) 2.47 3.04 2.96 2.95 3.35 3.38 FOV (°) 162.00 176.00 178.00 178.00 120.00 80.00 EPD (mm) 1.18 1.52 1.48 1.47 1.20 1.54 TTL(mm) 13.15 11.27 10.53 11.48 8.69 10.26 FNO 2.10 2.00 2.00 2.00 2.80 2.20 IH(mm) 5.00 5.95 5.75 5.76 5.23 3.81 CRA(°) 15.78 28.02 29.30 28.29 39.98 42.11 TTL / f 5.32 3.70 3.56 3.90 2.59 3.03 TTL / IH 2.63 1.89 1.83 1.99 1.66 2.69 f*FOV / IH 80.14 90.01 91.64 91.08 76.76 71.03 D1 / IH 1.25 1.05 1.06 1.13 1.02 1.54 f1 / f -2.22 -2.68 -2.54 -2.81 -102.27 -2.37E+05 f3 / f -1.91 -1.89 -1.90 -1.97 -2.32 -2.54 f7 / f -3.49E+06 -0.90 -1.32 -0.99 -0.55 -0.54 R1 / f -3.99 -13.04 -33.78 -33.97 -31.64 -45.66 R4 / f -1.56 -1.25 -1.28 -1.29 -1.37 -1.52 R5 / f -0.68 -0.57 -0.59 -0.59 -1.28 -1.85 (R4-R5) / (R4+R5) 0.40 0.38 0.37 0.37 0.03 -0.10 R12 / f -4.23 -0.85 -1.53 -1.03 -0.65 -0.59 Sag3 / d3 -0.16 -0.15 -0.12 -0.13 -0.04 -0.03 Sag4 / d4 -0.15 -0.21 -0.19 -0.19 -0.08 -0.06 ΣCT / TTL 0.67 0.68 0.63 0.65 0.76 0.77

[0239] In summary, the optical lens in this embodiment of the invention, by reasonably allocating the optical power of each lens, reasonably matching the surface shape of each lens, and reasonably setting the thickness of each lens and the spacing between each lens, and by adopting a seven-piece plastic aspherical lens structure, can achieve a large field of view (maximum FOV value of 178°), a large aperture (minimum FNO value of 2.0), miniaturization (minimum TTL value of 8.69mm), and high pixel count, thereby meeting the imaging requirements of automotive lenses.

[0240] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0241] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. An optical lens comprising seven lenses, arranged sequentially along the optical axis from the object side to the imaging plane as follows: The first lens with negative optical power has a concave object side. A second lens with positive optical power has a convex image-side surface. A third lens with negative optical power has a concave object side. A fourth lens with positive optical power; The fifth lens has negative optical power and its image-side surface is concave. The sixth lens has positive optical power, with both its object-side and image-side surfaces being convex. A seventh lens with negative optical power; in, The fifth lens and the sixth lens are cemented together to form a cemented lens; The radius of curvature R1 of the side surface of the first lens and the effective focal length f of the optical lens satisfy: -888.97≤R1 / f<-3.5; The total optical length TTL of the optical lens and the effective focal length f of the optical lens satisfy the following condition: 2.59 ≤ TTL / f < 6.0; The effective focal length f of the optical lens, the maximum field of view (FOV) of the optical lens, and the image height IH corresponding to the maximum field of view of the optical lens satisfy the following condition: 55.0° < f * FOV / IH < 95.0°.

2. The optical lens according to claim 1, characterized in that, The radius of curvature R1 of the side surface of the first lens and the effective focal length f of the optical lens satisfy: -888.97≤R1 / f≤-3.99; The total optical length (TTL) of the optical lens and the effective focal length (f) of the optical lens satisfy the following condition: 2.59 ≤ TTL / f ≤ 5.

90.

3. The optical lens according to claim 1, characterized in that, The total optical length TTL of the optical lens and the image height IH corresponding to the maximum field of view of the optical lens satisfy the following condition: 2.61≤TTL / IH<2.

8.

4. The optical lens according to claim 1, characterized in that, The effective focal length f of the optical lens, the maximum field of view (FOV) of the optical lens, and the image height IH corresponding to the maximum field of view of the optical lens satisfy the following condition: 59.67°≤f*FOV / IH≤91.64°.

5. The optical lens according to claim 1, characterized in that, The effective focal length f1 of the first lens and the effective focal length f of the optical lens satisfy: f1 / f < -1.

2.

6. The optical lens according to claim 1, characterized in that, The effective focal length f3 of the third lens and the effective focal length f of the optical lens satisfy the condition: -57.16 ≤ f3 / f < -1.

5.

7. The optical lens according to claim 1, characterized in that, The effective focal length f7 of the seventh lens and the effective focal length f of the optical lens satisfy the following condition: f7 / f < -0.

4.

8. The optical lens according to claim 1, characterized in that, The radius of curvature R4 of the image side of the second lens and the effective focal length f of the optical lens satisfy: -2.5 < R4 / f < -1.0; the radius of curvature R5 of the object side of the third lens and the effective focal length f of the optical lens satisfy: -10.0 < R5 / f < -0.

4.

9. The optical lens according to claim 1, characterized in that, The radius of curvature R12 of the image side of the sixth lens and the effective focal length f of the optical lens satisfy the condition: -4.5 < R12 / f < -0.

5.

10. The optical lens according to claim 1, characterized in that, The sum of the center thicknesses of the first lens to the seventh lens, ∑CT, and the total optical length TTL of the optical lens satisfy the following condition: 0.60 < ∑CT / TTL < 0.80.

Images