Optical lens

Abstract

This invention provides an optical lens comprising seven lenses, characterized in that, along the optical axis from the object side to the imaging plane, the lenses are arranged as follows: a first lens with negative optical power, its object side being convex and its image side being concave; a second lens with negative optical power, its object side being convex and its image side being concave; a third lens with optical power, its object side being concave; a fourth lens with positive optical power, its image side being convex; a fifth lens with positive optical power, its object side and image side being both convex; a sixth lens with negative optical power, its object side and image side being both concave; and a seventh lens with positive optical power, its object side and image side being both convex; wherein the effective focal length f of the optical lens and the true image height IH corresponding to the maximum field of view satisfy: 4.0 < IH / f.

Description

Technical Field

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

[0002] With the development of automotive intelligence, vehicle driver assistance systems are gradually being improved. As one of the main tools for driver assistance systems to obtain external information, the image quality of in-vehicle cameras directly affects the performance of driver assistance systems.

[0003] To accurately acquire external information, automotive lenses require large, high-resolution chips, thus necessitating high resolution capabilities. Furthermore, for safety reasons, automotive lenses also need high stability to withstand various harsh environments and prevent performance degradation due to varying conditions. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide an optical lens that possesses the advantages of a large field of view and a large image plane.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] An optical lens comprising seven lenses, characterized in that, along the optical axis from the object side to the imaging plane, they are arranged as follows:

[0007] The first lens with negative optical power has a convex object side and a concave image side.

[0008] A second lens with negative optical power has a convex object side and a concave image side.

[0009] A third lens with optical power has a concave object side.

[0010] The fourth lens has positive optical power and its image-side surface is convex.

[0011] The fifth lens with positive optical power has convex surfaces on both its object side and image side.

[0012] The sixth lens has negative optical power, and both its object-side and image-side surfaces are concave.

[0013] The seventh lens with positive optical power has convex surfaces on both its object side and image side.

[0014] The effective focal length f of the optical lens and the true image height IH corresponding to the maximum field of view satisfy: 4.0 < IH / f.

[0015] Preferably, the total optical length TTL of the optical lens and the true image height IH corresponding to the maximum field of view satisfy: TTL / IH < 4.7.

[0016] Preferably, the entrance pupil diameter EPD of the optical lens and the true image height IH corresponding to the maximum field of view satisfy: 7.0 < IH / EPD < 11.0.

[0017] Preferably, the true image height IH corresponding to the maximum field of view of the optical lens and the true image height IH corresponding to the maximum half field of view are... h Satisfy: 0.35 < IH h / IH < 0.45.

[0018] Preferably, the effective focal length f, the maximum field of view θ, and the true image height IH corresponding to the maximum field of view of the optical lens satisfy: 1.2 < (IH / 2) / (f×(θ / 2)) < 1.6.

[0019] Preferably, the maximum field of view (FOV) of the optical lens and the incident angle CRA of the principal ray of the maximum field of view on the image plane satisfy: 4.0 < (FOV / 2) / CRA < 6.0.

[0020] Preferably, the effective focal length f of the optical lens and the focal length f1 of the first lens satisfy: -14.0 < f1 / f < -7.0.

[0021] Preferably, the effective focal length f of the optical lens satisfies the following conditions with respect to the object side curvature radius R1 and the image side curvature radius R2 of the first lens: 10.0 < R1 / f, R2 / f < 6.0.

[0022] Preferably, the sagitta Sag3 and the half-aperture d3 of the object side of the second lens and the sagitta Sag4 and the half-aperture d4 of the image side of the second lens satisfy the following: 0.2 < (Sag3 / d3) / (Sag4 / d4) < 0.4.

[0023] Preferably, the total optical length TTL of the optical lens and the sum of the center thicknesses ∑CT of the first lens to the sixth lens along the optical axis satisfy: 0.4 < ∑CT / TTL < 0.7.

[0024] Compared with the prior art, the beneficial effect of the present invention is that by reasonably matching the lens shape and optical power combination of each lens, it achieves the advantages of having both a large field of view and a large image plane.

[0025] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0027] Figure 1 This is a schematic diagram of the structure of the optical lens in Embodiment 1 of the present invention.

[0028] Figure 2 This is a field curvature curve diagram of the optical lens in Embodiment 1 of the present invention.

[0029] Figure 3 This is an F-Theta distortion curve of the optical lens in Embodiment 1 of the present invention.

[0030] Figure 4 This is a relative illumination curve of the optical lens in Embodiment 1 of the present invention.

[0031] Figure 5 This is an MTF curve of the optical lens in Embodiment 1 of the present invention.

[0032] Figure 6 This is an axial aberration curve of the optical lens in Embodiment 1 of the present invention.

[0033] Figure 7 This is a chromatic aberration curve of the optical lens in Embodiment 1 of the present invention.

[0034] Figure 8 This is a schematic diagram of the optical lens structure of Embodiment 2 of the present invention.

[0035] Figure 9 This is a field curvature curve diagram of the optical lens in Embodiment 2 of the present invention.

[0036] Figure 10 This is the F-Theta distortion curve of the optical lens in Embodiment 2 of the present invention.

[0037] Figure 11 This is a relative illumination curve of the optical lens in Embodiment 2 of the present invention.

[0038] Figure 12 This is the MTF curve of the optical lens in Embodiment 2 of the present invention.

[0039] Figure 13 This is an axial aberration curve of the optical lens in Embodiment 2 of the present invention.

[0040] Figure 14 This is a chromatic aberration curve of the optical lens in Embodiment 2 of the present invention.

[0041] Figure 15 This is a schematic diagram of the optical lens structure of Embodiment 3 of the present invention.

[0042] Figure 16 This is a field curvature curve diagram of the optical lens in Embodiment 3 of the present invention.

[0043] Figure 17 This is the F-Theta distortion curve of the optical lens in Embodiment 3 of the present invention.

[0044] Figure 18 This is a relative illumination curve of the optical lens in Embodiment 3 of the present invention.

[0045] Figure 19 This is an MTF curve of the optical lens in Embodiment 3 of the present invention.

[0046] Figure 20 This is an axial aberration curve of the optical lens in Embodiment 3 of the present invention.

[0047] Figure 21 This is a chromatic aberration curve of the optical lens in Embodiment 3 of the present invention.

[0048] Figure 22 This is a schematic diagram of the optical lens structure of Embodiment 4 of the present invention.

[0049] Figure 23 This is a field curvature curve diagram of the optical lens in Embodiment 4 of the present invention.

[0050] Figure 24 This is the F-Theta distortion curve of the optical lens in Embodiment 4 of the present invention.

[0051] Figure 25 This is a relative illumination curve of the optical lens in Embodiment 4 of the present invention.

[0052] Figure 26 This is the MTF curve of the optical lens in Embodiment 4 of the present invention.

[0053] Figure 27 This is an axial aberration curve of the optical lens in Embodiment 4 of the present invention.

[0054] Figure 28 This is a chromatic aberration curve of the optical lens in Embodiment 4 of the present invention.

[0055] Figure 29 This is a schematic diagram of the structure of the optical lens in Embodiment 5 of the present invention.

[0056] Figure 30 This is a field curvature curve diagram of the optical lens in Embodiment 5 of the present invention.

[0057] Figure 31 This is the F-Theta distortion curve of the optical lens in Embodiment 5 of the present invention.

[0058] Figure 32 This is a relative illumination curve of the optical lens in Embodiment 5 of the present invention.

[0059] Figure 33This is the MTF curve of the optical lens in Embodiment 5 of the present invention.

[0060] Figure 34 This is an axial aberration curve of the optical lens in Embodiment 5 of the present invention.

[0061] Figure 35 This is a chromatic aberration curve of the optical lens in Embodiment 5 of the present invention. Detailed Implementation

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] According to an embodiment of the present invention, the optical lens, from the object side to the image side, comprises, in sequence: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, a filter, and a protective glass.

[0070] In some embodiments, the first lens may have negative optical power, which helps to reduce the angle of incidence of light rays, thereby effectively sharing the large field of view on the object side. The object side of the first lens is convex, and the image side is concave, which helps to obtain a larger field of view. In addition, in practical applications, considering the outdoor installation environment of automotive lenses, the lens will be exposed to harsh weather conditions such as rain and snow. Setting the first lens to a meniscus shape with the convex side facing the object side can facilitate the sliding off of water droplets, reducing the impact on the lens imaging. The first lens may have an aspherical mirror surface, which helps to have a large angular resolution in the edge area of ​​the optical lens and can improve the resolution in the edge field of view area.

[0071] In some embodiments, the second lens may have negative optical power, which can share the negative optical power of the front end of the optical lens, thereby helping to avoid excessive light refraction caused by excessive concentration of optical power in the first lens, and reducing the difficulty of chromatic aberration correction in the optical lens. The object-side of the second lens is convex and the image-side is concave, which helps to improve the light collection capability of the edge field of view while reducing the working aperture of the second lens, thereby facilitating the miniaturization of the rear end volume of the optical lens; in addition, it can effectively avoid transverse chromatic aberration caused by excessive refraction angle of edge field of view during the transmission of light from the first lens to the second lens, reducing the difficulty of chromatic aberration correction in the optical lens.

[0072] In some embodiments, the object side of the third lens is concave, which helps to converge edge light rays, effectively transmit more light beams to the rear optical system, and improve the imaging quality of the optical lens.

[0073] In some embodiments, the fourth lens may have positive optical power, which helps to reduce the light refraction angle and allow the light path to transition smoothly. The image side of the fourth lens is convex, which can reduce the energy of ghost images projected onto the image plane due to reflection in the central area, thereby improving the imaging quality of the optical lens.

[0074] In some embodiments, the fifth lens may have positive optical power, which is beneficial for improving the ability to converge light rays at the edge of the field of view, while effectively controlling the overall optical length to reduce the size of the optical lens, thereby facilitating the miniaturization of the optical lens. Both the object-side and image-side surfaces of the fifth lens are convex, which is beneficial for a smooth transition of light rays and balances the spherical aberration and coma generated by the fifth lens itself, thereby improving the imaging quality of the optical lens.

[0075] In some embodiments, the sixth lens may 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. Both the object-side and image-side of the sixth lens are concave, which is beneficial for balancing the astigmatism generated by the sixth lens itself and improving the imaging quality of the optical lens.

[0076] In some embodiments, the seventh lens may have positive optical power, which helps to suppress the angle of incidence of the edge field of view onto the imaging plane, effectively transmitting more light beams to the imaging plane and improving the imaging quality of the optical lens. Both the object-side and image-side surfaces of the seventh lens are convex, which helps to improve the relative illumination of the edge field of view, avoid the generation of vignetting, and improve the imaging quality of the optical lens.

[0077] In some embodiments, the fifth lens and the sixth lens can be cemented together to form a cemented lens, which can effectively correct chromatic aberration of the optical lens, reduce the eccentricity sensitivity of the optical lens, balance the aberrations of the optical lens, and improve the imaging quality of the optical lens; it can also reduce the assembly sensitivity of the optical lens, thereby reducing the processing difficulty of the optical lens and improving the assembly yield of the optical lens.

[0078] In some embodiments, an aperture stop for limiting the light beam may be provided between the third lens and the fourth lens or the fourth lens and the fifth lens. The aperture stop may be located near the object side of the fourth lens or the fifth lens, which can reduce the generation of optical lens ghosting and help to focus the light entering the optical lens and reduce the rear port diameter of the optical lens.

[0079] In some embodiments, the aperture value FNO of the optical lens satisfies: FNO < 2.10. Satisfying this range allows the optical lens to have a sufficiently large depth of field, enabling it to clearly acquire information from distant locations.

[0080] In some embodiments, the maximum field of view (FOV) of the optical lens satisfies: 190° ≤ FOV. Meeting this range is beneficial for achieving ultra-wide-angle characteristics, thereby enabling the acquisition of more scene information and meeting the needs of the optical lens for wide-range detection.

[0081] In some embodiments, the incident angle CRA of the principal ray at the maximum field of view of the optical lens on the image plane satisfies: 18° < CRA < 23°. 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.

[0082] In some embodiments, the total optical length (TTL) of the optical lens and the true image height (IH) corresponding to the maximum field of view satisfy the condition: TTL / IH < 4.7. Meeting this range helps to achieve a balance between good imaging quality and miniaturized design in the optical lens, and can meet the requirements of the optical lens under different working conditions.

[0083] In some embodiments, the effective focal length f of the optical lens and the true image height IH corresponding to the maximum field of view satisfy the condition: 4.0 < IH / f. Meeting this range enables both ultra-wide-angle characteristics to meet the needs of wide-range shooting and large image plane characteristics to improve the imaging quality of the optical lens.

[0084] In some embodiments, the optical back focal length (BFL) and effective focal length (f) of the optical lens satisfy the condition: 1.3 < BFL / f. Satisfying this range helps to achieve a balance between obtaining good image quality and an optical back focal length that is easy to assemble, ensuring the image quality of the optical lens while reducing the assembly process difficulty of the camera module.

[0085] In some embodiments, the maximum field of view (FOV) and effective focal length (f) of the optical lens satisfy the following condition: 110° / mm < FOV / f < 150° / mm. Meeting this range allows for a larger field of view while reducing the deflection angle of the outgoing light rays, thus lowering the sensitivity of the optical lens and reducing the difficulty of correcting various aberrations, thereby improving the imaging quality of the optical lens.

[0086] In some embodiments, the entrance pupil diameter EPD of the optical lens and the true image height IH corresponding to the maximum field of view satisfy the following condition: 7.0 < IH / EPD < 11.0. Satisfying the above range allows for a larger width of the light beam entering the optical lens, thereby improving the brightness of the optical lens at the image plane and avoiding vignetting, while also increasing the imaging area of ​​the optical lens.

[0087] In some embodiments, the true image height IH corresponding to the maximum field of view of the optical lens and the true image height IH corresponding to the maximum half field of view are... h Satisfy: 0.35 < IH h / IH < 0.45. Meeting this range can increase the proportion of the edge field of view imaging range in the entire imaging range. The larger the imaging range, the more pixels are occupied on the chip surface, thus obtaining more edge field of view detail information.

[0088] In some embodiments, the effective focal length f, maximum field of view θ, and the true image height IH corresponding to the maximum field of view of the optical lens satisfy the following condition: 1.2 < (IH / 2) / (f × (θ / 2)) < 1.6. Satisfying this range is beneficial for controlling the smooth changes in edge distortion of the optical lens, facilitating subsequent restoration using software algorithms.

[0089] In some embodiments, the maximum field of view (FOV) of the optical lens and the angle of incidence (CRA) of the principal ray at the maximum field of view on the image plane satisfy the following condition: 4.0 < (FOV / 2) / CRA < 6.0. Meeting this range allows the optical lens to achieve a large field of view while ensuring that incident light rays enter the image sensor at a suitable angle, thereby improving the image sensor's light sensitivity and enhancing the imaging quality of the optical lens.

[0090] In some embodiments, the effective focal length f of the optical lens and the focal length f1 of the first lens satisfy: -14.0 < f1 / f < -7.0. Satisfying the above range allows the first lens to have appropriate negative optical power, which is beneficial for reducing the angle of incidence of the incident light, thereby effectively sharing the large field of view on the object side, and at the same time obtaining a larger field of view range.

[0091] In some embodiments, the effective focal length f of the optical lens and the focal length f2 of the second lens satisfy: -4.0 < f2 / f < -3.0. Satisfying this range allows the second lens to have appropriate negative optical power, which can share the negative optical power at the front end of the optical lens. This helps to avoid excessive light refraction caused by excessive concentration of the optical power of the first lens, and reduces the difficulty of chromatic aberration correction in the optical lens.

[0092] In some embodiments, the effective focal length f of the optical lens and the focal length f3 of the third lens satisfy the condition: 5.0 < |f3 / f| < 15.0. Satisfying this range allows the third lens to have appropriate optical power, which is beneficial for balancing various aberrations of the optical lens and improving the imaging quality of the optical lens.

[0093] In some embodiments, the effective focal length f of the optical lens and the focal length f4 of the fourth lens satisfy the condition: 2.0 < f4 / f < 9.0. Meeting this range allows the fourth lens to have appropriate positive optical power, which helps to converge light while reducing the light deflection angle, ensuring a smooth transition of light path and improving the imaging quality of the optical lens.

[0094] In some embodiments, the effective focal length f of the optical lens and the focal length f5 of the fifth lens satisfy the condition: 1.5 < f5 / f < 3.5. Satisfying this range allows the fifth lens to have appropriate positive optical power, which is beneficial for improving the light-gathering ability of the edge field of view, while effectively controlling the overall optical length to reduce the size of the optical lens, thereby facilitating the miniaturization of the optical lens.

[0095] In some embodiments, the effective focal length f of the optical lens and the focal length f6 of the sixth lens satisfy the condition: -2.0 < f6 / f < -1.0. Satisfying this range allows the sixth lens to have appropriate negative optical power, which is beneficial for increasing the imaging area of ​​the optical lens and improving its imaging quality.

[0096] In some embodiments, the effective focal length f of the optical lens and the focal length f7 of the seventh lens satisfy the condition: 2.0 < f7 / f < 3.8. Satisfying this range allows the seventh lens to have appropriate positive optical power, which helps to suppress the angle of incidence of the edge field of view onto the imaging plane, effectively transmits more light beams to the imaging plane, and improves the imaging quality of the optical lens.

[0097] In some embodiments, the effective focal length f of the optical lens is combined with the combined focal length f of the fifth and sixth lenses. 56 Satisfy: -50.0 < f 56 / f < -3.0. Meeting the above range means that the cemented lens composed of the fifth and sixth lenses has appropriate negative optical power, which is beneficial to balancing the chromatic aberration of the optical lens and improving the imaging quality of the optical lens.

[0098] In some embodiments, the effective focal length f of the optical lens satisfies the following conditions with respect to the object-side curvature radius R1 and the image-side curvature radius R2 of the first lens: 10.0 < R1 / f, R2 / f < 6.0. Satisfying these ranges is beneficial for achieving ultra-wide-angle characteristics, thereby enabling the acquisition of more scene information and meeting the needs of the optical lens for wide-range detection.

[0099] In some embodiments, the sagitta Sag3 and half-aperture d3 of the object side of the second lens and the sagitta Sag4 and half-aperture d4 of the image side of the second lens satisfy the following condition: 0.2 < (Sag3 / d3) / (Sag4 / d4) < 0.4. Satisfying this range is beneficial for compressing the central field of view of the optical lens, resulting in better imaging quality at the edges of the field of view.

[0100] In some embodiments, the total optical length TTL of the optical lens and the sum of the center thicknesses ∑CT of the first to sixth lenses along the optical axis satisfy the following condition: 0.4 < ∑CT / TTL < 0.7. Satisfying this range can effectively compress the total length of the optical lens, while also benefiting the structural design and manufacturing process of the optical lens.

[0101] 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:

[0102]

[0103] 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, and F are the second, fourth, sixth, eighth, tenth, and twelfth order surface coefficients, respectively.

[0104] 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.

[0105] Example 1

[0106] Please see Figure 1 The figure shows a schematic diagram of the structure of the 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, the following components in sequence: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture ST, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter G1, and a protective glass G2.

[0107] The first lens L1 has negative optical power, its object side S1 is convex, and its image side S2 is concave.

[0108] The second lens L2 has negative optical power, its object side S3 is convex, and its image side S4 is concave.

[0109] The third lens L3 has negative optical power, its object side S5 is concave, and its image side S6 is convex.

[0110] The fourth lens L4 has positive optical power, and both its object-side surface S7 and image-side surface S8 are convex.

[0111] Aperture ST;

[0112] The fifth lens L5 has positive optical power, and both its object side S9 and image side S10 are convex surfaces;

[0113] The sixth lens L6 has negative optical power, and both its object-side surface S11 and image-side surface S12 are concave.

[0114] The seventh lens L7 has positive optical power, and both its object-side surface S13 and image-side surface S14 are convex.

[0115] The filter G1 has both its object side S15 and image side S16 as planes.

[0116] The protective glass G2 has a flat surface on both the object side S17 and the image side S18.

[0117] Imaging plane S19 is a plane;

[0118] The fifth lens L5 and the sixth lens L6 can be cemented together to form a cemented lens.

[0119] The relevant parameters of each lens in the optical lens of Example 1 are shown in Table 1-1.

[0120] Table 1-1

[0121]

[0122]

[0123] The surface profile parameters of the aspherical lens in Example 1 are shown in Table 1-2.

[0124] Table 1-2

[0125] Face number K A B C D E F S3 -5.00E+01 0.00E+00 1.38E-03 -7.22E-05 2.75E-06 -5.35E-08 4.11E-10 S4 -4.82E-01 0.00E+00 -2.26E-03 2.47E-04 -3.31E-05 1.96E-06 -4.55E-08 S5 1.49E-03 0.00E+00 -1.90E-05 -4.33E-05 2.17E-05 -1.20E-06 3.04E-08 S6 -1.84E+00 0.00E+00 -1.29E-04 -1.74E-05 4.60E-06 -2.15E-07 4.45E-09 S13 -1.71E+00 0.00E+00 -2.29E-03 5.68E-04 -7.24E-05 7.07E-06 -2.59E-07 S14 9.46E-01 0.00E+00 4.44E-03 -3.43E-04 1.29E-04 -1.40E-05 7.09E-07

[0126] 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 ±0.05 mm, indicating that the optical lens can correct the field curvature very well.

[0127] Figure 3 The F-Theta distortion curve of Example 1 is shown, which represents the F-Theta distortion of light of different wavelengths at different image heights on the imaging plane. The horizontal axis represents F-Theta distortion (unit: %), and the vertical axis represents the half field of view (unit: °). As can be seen from the figure, the F-Theta distortion of the optical lens is controlled within 0-24%, indicating that the F-Theta distortion of the optical lens is effectively controlled, which is beneficial for subsequent reconstruction by software algorithms.

[0128] Figure 4The 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 50% at the maximum half-field angle, indicating that the optical lens has good relative illumination.

[0129] Figure 5 The 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.

[0130] Figure 6 The diagram shows the axial aberration curves for Example 1, representing the aberrations of each wavelength along the optical axis at the imaging plane. The horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. As can be seen from the diagram, the axial aberration offset is controlled within ±15 μm, indicating that the optical lens can effectively correct axial aberrations.

[0131] Figure 7 The diagram shows the transverse chromatic aberration curves for Example 1, representing the chromatic aberration of each wavelength relative to the center wavelength (0.55 μm) at different image heights on the imaging plane. The horizontal axis represents the transverse chromatic aberration value (unit: μm) of each wavelength relative to the center wavelength, and the vertical axis represents the normalized field of view. As can be seen from the diagram, the transverse chromatic aberration of the longest and shortest wavelengths is controlled within ±2 μm, indicating that the optical lens can excellently correct chromatic aberration at the edge of the field of view and the secondary spectrum of the entire image plane.

[0132] Example 2

[0133] Please see Figure 8 The figure shows a schematic diagram of the structure of the optical lens provided in Embodiment 2 of the present invention. The optical lens includes, along the optical axis from the object side to the imaging plane, 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, a filter G1, and a protective glass G2.

[0134] The first lens L1 has negative optical power, its object side S1 is convex, and its image side S2 is concave.

[0135] The second lens L2 has negative optical power, its object side S3 is convex, and its image side S4 is concave.

[0136] The third lens L3 has negative optical power, and its object side S5 and image side S6 are both concave.

[0137] Aperture ST;

[0138] The fourth lens L4 has positive optical power, and both its object-side surface S7 and image-side surface S8 are convex.

[0139] The fifth lens L5 has positive optical power, and both its object side S9 and image side S10 are convex surfaces;

[0140] The sixth lens L6 has negative optical power, and both its object-side surface S11 and image-side surface S12 are concave.

[0141] The seventh lens L7 has positive optical power, and both its object-side surface S13 and image-side surface S14 are convex.

[0142] The filter G1 has both its object side S15 and image side S16 as planes.

[0143] The protective glass G2 has a flat surface on both the object side S17 and the image side S18.

[0144] Imaging plane S19 is a plane;

[0145] The fifth lens L5 and the sixth lens L6 can be cemented together to form a cemented lens.

[0146] The relevant parameters of each lens in the optical lens of Example 2 are shown in Table 2-1.

[0147] Table 2-1

[0148]

[0149]

[0150] The surface profile parameters of the aspherical lens in Example 2 are shown in Table 2-2.

[0151] Table 2-2

[0152] Face number K A B C D E F S3 -2.77E+01 0.00E+00 -4.65E-04 4.02E-05 -2.93E-07 -1.54E-08 3.58E-10 S4 -9.03E-01 0.00E+00 -9.51E-03 1.32E-03 -1.75E-04 1.48E-05 -6.92E-07 S5 2.02E+01 0.00E+00 -1.33E-03 -5.93E-04 1.27E-04 -1.35E-05 7.91E-07 S6 2.64E+01 0.00E+00 6.94E-03 1.15E-03 8.44E-04 -9.49E-04 6.01E-04 S13 9.18E+00 0.00E+00 -9.09E-03 1.28E-03 7.08E-06 -2.92E-05 1.73E-06 S14 -2.31E+00 0.00E+00 7.52E-03 -3.13E-03 6.27E-04 -4.77E-05 1.17E-06

[0153] Figure 9 The field curvature curve of Example 2 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 ±0.05 mm, indicating that the optical lens can correct the field curvature very well.

[0154] Figure 10The F-Theta distortion curve of Example 2 is shown, which represents the F-Theta distortion of light of different wavelengths at different image heights on the imaging plane. The horizontal axis represents F-Theta distortion (unit: %), and the vertical axis represents the half field of view (unit: °). As can be seen from the figure, the F-Theta distortion of the optical lens is controlled within 0-60% and the edge distortion changes smoothly, indicating that the F-Theta distortion of the optical lens is effectively controlled, which is beneficial for subsequent restoration by software algorithms.

[0155] Figure 11 The relative illumination curves for Example 2 are shown, representing the relative illumination values ​​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 graph, the relative illumination value of the optical lens is still greater than 40% at the maximum half-field angle, indicating that the optical lens has good relative illumination.

[0156] Figure 12 The modulation transfer function (MTF) curve of Example 2 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. 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, exhibiting good imaging quality and good detail resolution at both low and high frequencies.

[0157] Figure 13 The axial aberration curve of Example 2 is shown, which represents the aberration of each wavelength on the optical axis at the imaging plane. The horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. As can be seen from the figure, the axial aberration offset is controlled within ±15μm, indicating that the optical lens can effectively correct axial aberration.

[0158] Figure 14 The diagram shows the transverse chromatic aberration curves for Example 2, representing the chromatic aberration of each wavelength relative to the center wavelength (0.55 μm) at different image heights on the imaging plane. The horizontal axis represents the transverse chromatic aberration value (unit: μm) of each wavelength relative to the center wavelength, and the vertical axis represents the normalized field of view. As can be seen from the diagram, the transverse chromatic aberration of the longest and shortest wavelengths is controlled within ±3 μm, indicating that the optical lens can excellently correct chromatic aberration at the edge of the field of view and the secondary spectrum of the entire image plane.

[0159] Example 3

[0160] Please see Figure 15The figure shows a schematic diagram of the structure of the optical lens provided in Embodiment 3 of the present invention. The optical lens includes, in sequence along the optical axis from the object side to the imaging plane: 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, a filter G1, and a protective glass G2.

[0161] The first lens L1 has negative optical power, its object side S1 is convex, and its image side S2 is concave.

[0162] The second lens L2 has negative optical power, its object side S3 is convex, and its image side S4 is concave.

[0163] The third lens L3 has negative optical power, and its object side S5 and image side S6 are both concave.

[0164] Aperture ST;

[0165] The fourth lens L4 has positive optical power, and both its object-side surface S7 and image-side surface S8 are convex.

[0166] The fifth lens L5 has positive optical power, and both its object side S9 and image side S10 are convex surfaces;

[0167] The sixth lens L6 has negative optical power, and both its object-side surface S11 and image-side surface S12 are concave.

[0168] The seventh lens L7 has positive optical power, and both its object-side surface S13 and image-side surface S14 are convex.

[0169] The filter G1 has both its object side S15 and image side S16 as planes.

[0170] The protective glass G2 has a flat surface on both the object side S17 and the image side S18.

[0171] Imaging plane S19 is a plane;

[0172] The fifth lens L5 and the sixth lens L6 can be cemented together to form a cemented lens.

[0173] The relevant parameters of each lens in the optical lens of Example 3 are shown in Table 3-1.

[0174] Table 3-1

[0175]

[0176]

[0177] The surface profile parameters of the aspherical lens in Example 3 are shown in Table 3-2.

[0178] Table 3-2

[0179] Face number K A B C D E F S3 5.01E+01 0.00E+00 3.82E-03 -2.69E-04 9.98E-06 -1.85E-07 1.42E-09 S4 -8.03E-01 0.00E+00 -3.26E-03 2.53E-03 -6.46E-04 6.60E-05 -2.69E-06 S5 -1.36E+01 0.00E+00 -4.91E-03 6.07E-04 -1.60E-04 1.87E-05 -7.41E-07 S6 -1.29E+01 0.00E+00 4.89E-03 2.32E-03 -2.51E-03 1.55E-03 -2.95E-04 S13 1.43E-01 0.00E+00 -3.04E-03 1.74E-04 3.09E-05 -3.84E-06 1.21E-07 S14 -2.18E+00 0.00E+00 1.60E-02 -2.52E-03 2.51E-04 -8.44E-06 -3.06E-08

[0180] Figure 16 The field curvature curve of Example 3 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 ±0.05 mm, indicating that the optical lens can correct the field curvature very well.

[0181] Figure 17 The F-Theta distortion curve of Example 3 is shown, which represents the F-Theta distortion of light of different wavelengths at different image heights on the imaging plane. The horizontal axis represents F-Theta distortion (unit: %), and the vertical axis represents the half field of view (unit: °). As can be seen from the figure, the F-Theta distortion of the optical lens is controlled within 0-60% and the edge distortion changes smoothly, indicating that the F-Theta distortion of the optical lens is effectively controlled, which is beneficial for subsequent restoration by software algorithms.

[0182] Figure 18 The relative illumination curve of Example 3 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 40% at the maximum half-field angle, indicating that the optical lens has good relative illumination.

[0183] Figure 19 The modulation transfer function (MTF) curve of Example 3 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. 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, exhibiting good imaging quality and good detail resolution at both low and high frequencies.

[0184] Figure 20 The axial aberration curve of Example 3 is shown, which represents the aberration of each wavelength on the optical axis at the imaging plane. The horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. As can be seen from the figure, the axial aberration offset is controlled within ±15μm, indicating that the optical lens can effectively correct axial aberration.

[0185] Figure 21The diagram shows the transverse chromatic aberration curves for Example 3, representing the chromatic aberration of each wavelength relative to the center wavelength (0.55 μm) at different image heights on the imaging plane. The horizontal axis represents the transverse chromatic aberration value (unit: μm) of each wavelength relative to the center wavelength, and the vertical axis represents the normalized field of view. As can be seen from the figure, the transverse chromatic aberration of the longest and shortest wavelengths is controlled within ±3 μm, indicating that the optical lens can excellently correct chromatic aberration at the edge of the field of view and the secondary spectrum of the entire image plane.

[0186] Example 4

[0187] Please see Figure 22 The figure shows a schematic diagram of the structure of the optical lens provided in Embodiment 4 of the present invention. The optical lens includes, along the optical axis from the object side to the imaging plane, the following components in sequence: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture ST, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter G1, and a protective glass G2.

[0188] The first lens L1 has negative optical power, its object side S1 is convex, and its image side S2 is concave.

[0189] The second lens L2 has negative optical power, its object side S3 is convex, and its image side S4 is concave.

[0190] The third lens L3 has positive optical power, its object side S5 is concave, and its image side S6 is convex.

[0191] The fourth lens L4 has positive optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex.

[0192] Aperture ST;

[0193] The fifth lens L5 has positive optical power, and both its object side S9 and image side S10 are convex surfaces;

[0194] The sixth lens L6 has negative optical power, and both its object-side surface S11 and image-side surface S12 are concave.

[0195] The seventh lens L7 has positive optical power, and both its object-side surface S13 and image-side surface S14 are convex.

[0196] The filter G1 has both its object side S15 and image side S16 as planes.

[0197] The protective glass G2 has a flat surface on both the object side S17 and the image side S18.

[0198] Imaging plane S19 is a plane;

[0199] The fifth lens L5 and the sixth lens L6 can be cemented together to form a cemented lens.

[0200] The relevant parameters of each lens in the optical lens of Example 4 are shown in Table 4-1.

[0201] Table 4-1

[0202]

[0203]

[0204] The surface profile parameters of the aspherical lens in Example 4 are shown in Table 4-2.

[0205] Table 4-2

[0206] Face number K A B C D E F S3 1.02E+01 0.00E+00 6.93E-05 1.04E-06 3.08E-08 1.44E-10 -2.54E-11 S4 -2.28E-01 0.00E+00 -2.10E-03 4.77E-05 -5.01E-06 1.65E-07 -3.91E-09 S5 3.03E+01 0.00E+00 -2.17E-03 6.31E-05 -6.45E-06 6.14E-07 -9.70E-09 S6 -3.66E-01 0.00E+00 2.20E-04 5.60E-06 2.88E-06 -2.59E-07 1.13E-08 S13 7.23E+00 0.00E+00 -9.44E-04 5.79E-05 -3.96E-05 8.85E-06 -4.10E-07 S14 -3.00E+01 0.00E+00 -5.95E-03 1.52E-03 -2.27E-04 1.96E-05 -4.63E-07

[0207] Figure 23 The field curvature curve of Example 4 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 ±0.05 mm, indicating that the optical lens can correct the field curvature very well.

[0208] Figure 24 The F-Theta distortion curve of Example 4 is shown, which represents the F-Theta distortion of light of different wavelengths at different image heights on the imaging plane. The horizontal axis represents F-Theta distortion (unit: %), and the vertical axis represents the half field of view (unit: °). As can be seen from the figure, the F-Theta distortion of the optical lens is controlled within 0-30%, indicating that the F-Theta distortion of the optical lens is effectively controlled, which is beneficial for subsequent restoration by software algorithms.

[0209] Figure 25 The relative illumination curves for Example 4 are shown, representing the relative illumination values ​​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 graph, the relative illumination value of the optical lens is still greater than 40% at the maximum half-field angle, indicating that the optical lens has good relative illumination.

[0210] Figure 26 The modulation transfer function (MTF) curve of Example 4 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 0.4 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, exhibiting good imaging quality and good detail resolution at both low and high frequencies.

[0211] Figure 27 The axial aberration curve of Example 4 is shown, which represents the aberration of each wavelength on the optical axis at the imaging plane. The horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. As can be seen from the figure, the axial aberration offset is controlled within ±10μm, indicating that the optical lens can effectively correct axial aberration.

[0212] Figure 28 The diagram shows the transverse chromatic aberration curves for Example 4, representing the chromatic aberration of each wavelength relative to the center wavelength (0.55 μm) at different image heights on the imaging plane. The horizontal axis represents the transverse chromatic aberration value of each wavelength relative to the center wavelength (unit: μm), and the vertical axis represents the normalized field of view. As can be seen from the figure, the transverse chromatic aberration of the longest and shortest wavelengths is controlled within ±2 μm, indicating that the optical lens can excellently correct chromatic aberration at the edge of the field of view and the secondary spectrum of the entire image plane.

[0213] Example 5

[0214] Please see Figure 29 The diagram shown is a schematic diagram of the structure of the optical lens provided in Embodiment 5 of the present invention. The optical lens includes, along the optical axis from the object side to the imaging plane, the following components in sequence: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture ST, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter G1, and a protective glass G2.

[0215] The first lens L1 has negative optical power, its object side S1 is convex, and its image side S2 is concave.

[0216] The second lens L2 has negative optical power, its object side S3 is convex, and its image side S4 is concave.

[0217] The third lens L3 has positive optical power, its object side S5 is concave, and its image side S6 is convex.

[0218] The fourth lens L4 has positive optical power, and both its object-side surface S7h and image-side surface S8 are convex.

[0219] Aperture ST;

[0220] The fifth lens L5 has positive optical power, and both its object side S9 and image side S10 are convex surfaces;

[0221] The sixth lens L6 has negative optical power, and both its object-side surface S11 and image-side surface S12 are concave.

[0222] The seventh lens L7 has positive optical power, and both its object-side surface S13 and image-side surface S14 are convex.

[0223] The filter G1 has both its object side S15 and image side S16 as planes.

[0224] The protective glass G2 has a flat surface on both the object side S17 and the image side S18.

[0225] Imaging plane S19 is a plane;

[0226] The fifth lens L5 and the sixth lens L6 can be cemented together to form a cemented lens.

[0227] The relevant parameters of each lens in the optical lens of Example 5 are shown in Table 5-1.

[0228] Table 5-1

[0229]

[0230]

[0231] The surface profile parameters of the aspherical lens in Example 5 are shown in Table 5-2.

[0232] Table 5-2

[0233] Face number K A B C D E F S3 2.83E-01 0.00E+00 -4.53E-04 1.15E-05 -1.36E-07 -7.97E-10 7.17E-11 S4 -9.18E-01 0.00E+00 1.62E-03 4.88E-04 -1.02E-04 1.22E-05 -5.81E-07 S5 1.18E+01 0.00E+00 -2.56E-03 1.53E-06 -8.82E-06 1.27E-06 1.23E-07 S6 -1.06E+00 0.00E+00 3.71E-04 -3.37E-05 3.47E-05 -5.03E-06 3.60E-07 S13 -5.11E+00 0.00E+00 -3.66E-03 4.71E-04 -9.23E-05 1.27E-05 -4.66E-07 S14 -4.20E+00 0.00E+00 -3.25E-03 -3.39E-04 1.36E-04 -1.86E-05 1.04E-06

[0234] Figure 30 The field curvature curve of Example 5 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 ±0.1 mm, indicating that the optical lens can effectively correct the field curvature.

[0235] Figure 31 The F-Theta distortion curve of Example 5 is shown, which represents the F-Theta distortion of light of different wavelengths at different image heights on the imaging plane. The horizontal axis represents F-Theta distortion (unit: %), and the vertical axis represents the half field of view (unit: °). As can be seen from the figure, the F-Theta distortion of the optical lens is controlled within 0-24%, indicating that the F-Theta distortion of the optical lens is effectively controlled, which is beneficial for subsequent restoration by software algorithms.

[0236] Figure 32 The relative illumination curves for Example 5 are shown, representing the relative illumination values ​​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 graph, the relative illumination value of the optical lens is still greater than 40% at the maximum half-field angle, indicating that the optical lens has good relative illumination.

[0237] Figure 33The modulation transfer function (MTF) curve of Example 5 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 0.4 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, exhibiting good imaging quality and good detail resolution at both low and high frequencies.

[0238] Figure 34 The axial aberration curve of Example 5 is shown, which represents the aberration of each wavelength on the optical axis at the imaging plane. The horizontal axis represents the axial aberration value (unit: μm), and the vertical axis represents the normalized pupil radius. As can be seen from the figure, the axial aberration offset is controlled within ±10μm, indicating that the optical lens can effectively correct axial aberration.

[0239] Figure 35 The diagram shows the transverse chromatic aberration curves for Example 5, representing the chromatic aberration of each wavelength relative to the center wavelength (0.55 μm) at different image heights on the imaging plane. The horizontal axis represents the transverse chromatic aberration value (unit: μm) of each wavelength relative to the center wavelength, and the vertical axis represents the normalized field of view. As can be seen from the figure, the transverse chromatic aberration of the longest and shortest wavelengths is controlled within ±2 μm, indicating that the optical lens can excellently correct chromatic aberration at the edge of the field of view and the secondary spectrum of the entire image plane.

[0240] Please refer to Table 6 for the optical characteristics corresponding to each of the above embodiments, including the effective focal length f, total optical length TTL, aperture number FNO, true image height IH, field of view FOV, and the values ​​corresponding to each conditional expression in the embodiments.

[0241] Table 6

[0242] Parameters and conditional expressions Example 1 Example 2 Example 3 Example 4 Example 5 f(mm) 1.66 1.30 1.42 1.67 1.66 TTL(mm) 32.69 22.17 24.61 29.31 25.64 FNO 1.80 2.02 2.00 2.00 2.00 IH(mm) 6.99 6.80 7.18 7.10 7.26 EPD (mm) 0.92 0.65 0.71 0.84 0.92 FOV (°) 196 190 190 194 206 θ (rad) 3.42 3.32 3.32 3.39 3.60 CRA(°) 18.43 19.18 18.22 22.00 18.12 TTL / IH 4.67 3.26 3.43 4.13 3.53 IH / f 4.22 5.22 5.06 4.24 4.37 BFL / f 1.95 1.35 1.49 1.57 1.59 FOV / f (° / mm) 118.13 145.81 133.98 115.98 124.15 IH / EPD 7.59 10.54 10.13 8.48 7.87 <![CDATA[IH h / IH]]> 0.44 0.42 0.40 0.43 0.44 (IH / 2) / (f×(θ / 2)) 1.23 1.57 1.53 1.25 1.22 (FOV / 2) / CRA 5.32 4.95 5.21 4.41 5.69 <![CDATA[f1 / f]]> -9.27 -12.96 -10.12 -8.07 -8.28 <![CDATA[f2 / f]]> -3.59 -3.93 -3.44 -3.17 -3.26 <![CDATA[f3 / f]]> -12.05 -5.30 -13.89 5.67 6.97 <![CDATA[f4 / f]]> 5.70 2.73 3.07 8.29 3.77 <![CDATA[f5 / f]]> 2.49 3.04 3.21 1.79 2.94 <![CDATA[f6 / f]]> -1.64 -1.70 -1.69 -1.45 -1.51 <![CDATA[f7 / f]]> 2.69 2.04 2.81 3.82 3.09 <![CDATA[f 56 / f]]> -46.11 -6.79 -6.08 -26.03 -3.57 <![CDATA[R1 / f]]> 12.37 14.67 13.33 11.34 10.91 <![CDATA[R2 / f]]> 4.55 5.90 4.74 4.01 4.04 <![CDATA[(Sag3 / d3) / (Sag4 / d4)]]> 0.39 0.35 0.30 0.21 0.25 ∑CT / TTL 0.53 0.65 0.60 0.47 0.51

[0243] In summary, the optical lens of this invention achieves the advantages of both a large field of view and a large image plane by rationally combining the lens shapes and optical power of each lens.

[0244] 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.

[0245] 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, in total seven pieces of lenses, characterized in that, In order from the object side to the imaging surface along the optical axis, there are: a first lens with negative refractive power, the object side surface of which is a convex surface, and the image side surface of which is a concave surface; a second lens with negative refractive power, the object side surface of which is a convex surface, and the image side surface of which is a concave surface; a third lens with refractive power, the object side surface of which is a concave surface; a fourth lens with positive refractive power, the image side surface of which is a convex surface; a fifth lens with positive refractive power, both the object side surface and the image side surface of which are convex surfaces; a sixth lens with negative refractive power, both the object side surface and the image side surface of which are concave surfaces; a seventh lens with positive refractive power, both the object side surface and the image side surface of which are convex surfaces; The effective focal length f of the optical lens and the real image height IH corresponding to the maximum field of view angle satisfy: 4.0 < IH / f ≤ 5.

22. The entrance pupil diameter EPD of the optical lens and the real image height IH corresponding to the maximum field of view angle satisfy: 7.0 < IH / EPD < 11.

0.

2. The optical lens of claim 1, wherein, The total optical length TTL of the optical lens and the real image height IH corresponding to the maximum field of view angle satisfy: 3.26 ≤ TTL / IH < 4.

7.

3. The optical lens of claim 1, wherein, The effective focal length f of the optical lens and the real image height IH corresponding to the maximum field of view angle satisfy: 4.22 ≤ IH / f ≤ 5.

22. The entrance pupil diameter EPD of the optical lens and the real image height IH corresponding to the maximum field of view angle satisfy: 7.59 ≤ IH / EPD ≤ 10.

54.

4. The optical lens of claim 1, wherein, The real image height IH corresponding to the maximum field of view angle of the optical lens and the real image height IHh corresponding to the maximum half field of view angle satisfy: 0.35 < IHh / IH < 0.

45.

5. The optical lens of claim 1, wherein, The effective focal length f, the maximum field of view angle θ and the real image height IH corresponding to the maximum field of view angle of the optical lens satisfy: 1.2 < (IH / 2) / (f×(θ / 2)) < 1.

6.

6. The optical lens of claim 1, wherein, The maximum field of view angle FOV of the optical lens and the incident angle CRA of the chief ray of the maximum field of view angle on the image surface satisfy: 4.0 < (FOV / 2) / CRA < 6.

0.

7. The optical lens of claim 1, wherein, The effective focal length f of the optical lens and the focal length f1 of the first lens satisfy: -14.0 < f1 / f < -7.

0.

8. The optical lens of claim 1, wherein, The effective focal length f of the optical lens and the object side surface curvature radius R1 and the image side surface curvature radius R2 of the first lens respectively satisfy: 10.0 < R1 / f ≤ 14.67, 4.01 ≤ R2 / f < 6.

0.

9. The optical lens of claim 1, wherein, The object side surface sag height Sag3 and the half light entrance diameter d3 of the second lens and the image side surface sag height Sag4 and the half light entrance diameter d4 of the second lens satisfy: 0.2 < (Sag3 / d3) / (Sag4 / d4) < 0.

4.

10. The optical lens of claim 1, wherein, The total optical length TTL of the optical lens and the sum ∑CT of the central thicknesses of the first lens to the sixth lens along the optical axis respectively satisfy: 0.4 < ∑CT / TTL < 0.7.

Images