A large target surface high-definition imaging system
Patent Information
- Application Number
- CN202522174245.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-14
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-10-14
AI Technical Summary
[0004]本实用新型的目的是为了解决传统光学镜头难以满足高分辨率、低畸变以及良好夜视成像需求的问题，而提出了一种超大靶面高清成像系统
1、该超大靶面高清成像系统，通过采用第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜以及第七透镜所组成的七镜片式设计，且各透镜的面形结构与光学参数的最佳化范围相结合，通过混合结构，结合多片非球面，平衡了像差校正、大靶面、大光圈和广角的需求，且中心及边缘视场均具有极高的解析力，满足了镜头高成像质量及大广角的需求，且核心部分是由热稳定性优异的玻璃材质构成，能有效的控制了因环境温度变化产生的焦点漂移问题，有效提高了镜头质量。
Smart Images
Figure CN224922095U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of optical lens technology, specifically to a high-definition imaging system with an ultra-large target surface. Background Technology
[0002] An optical lens is a precision optical device that uses a lens (or lens group) to focus light, form an image, or change the path of light. It is widely used in photography, videography, microscopy, telescopes, medical endoscopy, machine vision, laser processing, AR / VR and other fields. With the rapid development of visual technology, the performance requirements for optical lenses are increasing day by day.
[0003] Currently, existing optical lenses are insufficient to meet the demands for high resolution, low distortion, and good night vision imaging. Furthermore, as shooting requirements increase, optical lenses not only need to have a wide angle to cover a larger area, but also need to be compatible with large-area image sensors to obtain higher quality image information. Summary of the Invention
[0004] The purpose of this invention is to solve the problem that traditional optical lenses cannot meet the requirements of high resolution, low distortion and good night vision imaging, and to propose an ultra-large target surface high-definition imaging system.
[0005] This utility model provides the following technical solution: A high-definition imaging system for ultra-large target surfaces includes an optical lens assembly comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged sequentially from the object side to the image side. The object side of the first lens to the image side of the fifth lens are spherical, while the object side of the sixth lens to the image side of the seventh lens are aspherical. The first lens has positive refractive power, and its object side is convex at the paraxial position. The second lens has negative refractive power, and its object side is convex. The third lens has positive refractive power and its image-side surface is convex. The fourth lens has positive refractive power and its object-side surface is convex near the axis, and its image-side surface is also convex near the axis. The fifth lens has negative refractive power and its image-side surface is concave. The sixth lens has positive refractive power and its object-side surface is concave. The seventh lens has negative refractive power and its object-side surface is concave. 170.468 < f / R4 < 173.532; 20.829 < V3 - V2 < 23.829; An aperture is positioned between the third and fourth lenses.
[0006] As a preferred embodiment of this utility model, -3.923<(R2+R3) / (R2-R3)<-2.922.
[0007] In a preferred embodiment of this utility model, 0.3440 < ∑CT / TTL < 0.6450.
[0008] As a preferred embodiment of this utility model, 0.632 <ct1 / ct2<0.937。
[0009] As a preferred embodiment of this utility model, 0.642 <TTL / f<3.842。
[0010] As a preferred embodiment of this utility model, 0.258 <TL / Dg<2.259。
[0011] As a preferred embodiment of this utility model, -0.345 <f23 / f4<-0.145。
[0012] As a preferred embodiment of this utility model, 96.351 <f2 / R3<101.567。
[0013] As a preferred embodiment of this utility model, 93.045 <f3 / R5<95.046。
[0014] Compared with the prior art, this utility model provides an ultra-large target surface high-definition imaging system, which has the following beneficial effects: 1. This ultra-large target surface high-definition imaging system employs a seven-lens design consisting of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The surface structure of each lens is combined with the optimal range of optical parameters. Through a hybrid structure, combined with multiple aspherical surfaces, it balances the requirements for aberration correction, large target surface, large aperture, and wide angle. It also has extremely high resolution in both the center and edge fields of view, meeting the requirements for high image quality and wide angle of view. Furthermore, the core part is made of glass material with excellent thermal stability, which can effectively control the focus drift problem caused by changes in ambient temperature, effectively improving the lens quality.
[0015] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This invention solves the problem that traditional optical lenses cannot meet the requirements of high resolution, low distortion and good night vision imaging. Attached Figure Description
[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.
[0017] Figure 1 This is a schematic diagram of the planar structure of a high-definition imaging system with an ultra-large target surface proposed in this utility model; Figure 2 The field curvature / distortion of the ultra-large target surface high-definition imaging system proposed in this utility model Figure 1 ; Figure 3 The present invention proposes an axial aberration curve for a high-definition imaging system with an ultra-large target surface. Figure 1 ; Figure 4 The field curvature / distortion of the ultra-large target surface high-definition imaging system proposed in this utility model Figure 2 ; Figure 5 The present invention proposes an axial aberration curve for a high-definition imaging system with an ultra-large target surface. Figure 2 ; Figure 6 The field curvature / distortion of the ultra-large target surface high-definition imaging system proposed in this utility model Figure 3 ; Figure 7 The present invention proposes an axial aberration curve for a high-definition imaging system with an ultra-large target surface. Figure 3 ; Figure 8 The field curvature / distortion of the ultra-large target surface high-definition imaging system proposed in this utility model Figure 4 ; Figure 9 The present invention proposes an axial aberration curve for a high-definition imaging system with an ultra-large target surface. Figure 4 .
[0018] In the diagram: 1. First lens; 2. Second lens; 3. Third lens; 4. Fourth lens; 5. Fifth lens; 6. Sixth lens; 7. Seventh lens; 8. Aperture stop. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Example: Reference Figures 1-2 A high-definition imaging system for ultra-large target surfaces, comprising an optical lens assembly, the optical lens assembly including: The first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, and the seventh lens 7 are arranged sequentially from the object side to the image side. Among them, the object-side surface of the first lens 1 to the image-side surface of the fifth lens 5 are spherical, and the object-side surface of the sixth lens 6 to the image-side surface of the seventh lens 7 are aspherical. The first lens 1 has positive refractive power and its object-side surface is convex at the paraxial position. The second lens 2 has negative refractive power and its object-side surface is convex. The third lens 3 has positive refractive power and its image-side surface is convex. The fourth lens 4 has positive refractive power and its object-side surface is convex at the paraxial position, and its image-side surface is convex at the paraxial position. The fifth lens 5 has negative refractive power and its image-side surface is concave. The sixth lens 6 has positive refractive power and its object-side surface is concave. The seventh lens 7 has negative refractive power and its object-side surface is concave. 170.468 < f / R4 < 173.532; 20.829 < V3 - V2 < 23.829; the aperture 8 is set between the third lens 3 and the fourth lens 4.
[0021] In some embodiments, the ratio of the overall focal length of the optical lens group to the radius of curvature of the image side surface of the fourth lens 4 satisfies the following range: 170.468 < f / R4 < 173.532; The difference between the dispersion coefficient of the third lens 3 and the dispersion coefficient of the second lens 2 satisfies the following interval: 20.829 < V3 - V2 < 23.829.
[0022] The optimal parameter range for the lens can be obtained by using the above ratios.
[0023] Specifically, in use, a seven-lens design consisting of a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, and a seventh lens 7 is adopted. The surface structure of each lens is combined with the optimal range of optical parameters. Through a hybrid structure, combined with multiple aspherical surfaces, the requirements for aberration correction, large target surface, large aperture, and wide angle are balanced. It also has extremely high resolution in both the center and edge fields of view, meeting the requirements for high image quality and wide angle of view. Furthermore, the core part is made of glass material with excellent thermal stability, which can effectively control the focus drift problem caused by changes in ambient temperature, thus effectively improving the quality of the lens.
[0024] In some embodiments, the ratio of the sum of the radii of curvature of the image-side surfaces of the second lens 2 and the third lens 3 to the difference in the radii of curvature of the image-side surfaces of the second lens 2 and the third lens 3 satisfies the following interval: -3.923<(R2+R3) / (R2-R3)<-2.922.
[0025] In some embodiments, the ratio of the sum of the center thicknesses of the first lens 1 to the seventh lens 7 along the optical axis to the total optical length of the optical lens group satisfies the following range: 0.3440<∑CT / TTL<0.6450.
[0026] In some embodiments, the ratio of the center thickness of the first lens 1 on the optical axis to the center thickness of the second lens 2 on the optical axis satisfies the following range: 0.632 <ct1 / ct2<0.937。
[0027] In some embodiments, the ratio of the total optical length of the optical lens group to the overall focal length of the optical lens group satisfies the following range: 0.642 <TTL / f<3.842。
[0028] In some embodiments, the ratio of the distance between the object-side vertex of the first lens 1 and the imaging plane to the diagonal length of the image plane at the maximum usable viewing angle of the optical lens group satisfies the following range: 0.258 <TL / Dg<2.259。
[0029] In some embodiments, the ratio of the focal length of the combination of the second lens 2 and the third lens 3 to the focal length of the fourth lens 4 satisfies the following range: -0.345 <f23 / f4<-0.145。
[0030] In some embodiments, the ratio of the focal length of the second lens 2 to the radius of curvature of the image-side surface of the second lens 2 satisfies the following range: 96.351 <f2 / R3<101.567。
[0031] In some embodiments, the ratio of the focal length of the third lens 3 to the radius of curvature of the image-side surface of the fifth lens 5 satisfies the following range: 93.045 <f3 / R5<95.046。
[0032] The meanings of "alphanumeric" in this utility model are as follows: TTL: Total optical length of the optical lens assembly; V2: Dispersion coefficient of the second lens 2; V3: Dispersion coefficient of the third lens 3; ∑CT: The sum of the center thicknesses of the first to seventh lenses along the optical axis; ct1: The center thickness of the first lens 1 on the optical axis; ct2: The center thickness of the second lens 2 on the optical axis; f: The overall focal length of the optical lens group; f2: Focal length of the second lens 2; f3: Focal length of the third lens 3; f4: Focal length of the fourth lens 4; f23: The focal length of the combination of the second lens 2 and the third lens 3; TL: Distance between the object-side vertex of the first lens 1 and the imaging plane; Dg: The diagonal length of the image plane at the maximum usable viewing angle of the optical lens group; R2: Radius of curvature of the side surface of the second lens 2; R3: Radius of curvature of the side surface of the third lens 2; R5: Radius of curvature of the side surface of the fifth lens 5; FOV: The maximum field of view of the optical lens assembly; Fno: Aperture value of the optical lens group.
[0033] Example 2: Based on Example 1, specific parameters were selected as f=15.34mm, Fno=1.89, FOV=62.40°, and the aspheric coefficient was used to obtain the following table:
[0034]
[0035]
[0036] Specifically, the data in the table above can be used to generate... Figure 2 and Figure 3 .
[0037] Example 3: Based on Example 1, specific parameters were selected as f=15.34mm, Fno=1.89, FOV=62.396°, and the aspheric coefficient was used to obtain the following table:
[0038]
[0039]
[0040] Specifically, the data in the table above can be used to generate... Figure 4 and Figure 5 .
[0041] Example 4: Based on Example 1, specific parameters were selected as f=15.343mm, Fno=1.889, FOV=62.380°, and the aspheric coefficient was used to obtain the following table:
[0042]
[0043]
[0044] Specifically, the data in the table above can be used to generate... Figure 6 and Figure 7 .
[0045] Example 5: Based on Example 1, the specific parameters selected are f=15.342mm, Fno=1.888, FOV=62.385°, and the aspheric coefficient, resulting in the following table:
[0046]
[0047]
[0048] Specifically, the data in the table above can be used to generate... Figure 8 and Figure 9 .
[0049] Components not described in detail in this article are existing technologies.
[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A high-definition imaging system for ultra-large target surfaces, comprising an optical lens assembly, characterized in that, The optical lens assembly includes: The first lens (1), the second lens (2), the third lens (3), the fourth lens (4), the fifth lens (5), the sixth lens (6), and the seventh lens (7) are arranged sequentially from the object side to the image side. Among them, the object side of the first lens (1) to the image side of the fifth lens (5) are spherical, and the object side of the sixth lens (6) to the image side of the seventh lens (7) are aspherical. The first lens (1) has positive refractive power and its object side is convex at the paraxial position. The second lens (2) has negative refractive power and its object side is convex. The third lens (3) has positive refractive power and its image side is convex. The fourth lens (4) has positive refractive power and its object side is convex at the paraxial position. Its image side is convex at the paraxial position. The fifth lens (5) has negative refractive power and its image side is concave. The sixth lens (6) has positive refractive power and its object side is concave. The seventh lens (7) has negative refractive power and its object side is concave. 170.468 < f / R4 < 173.532; 20.829 < V3-V2 < 23.829; An aperture stop (8) is positioned between the third lens (3) and the fourth lens (4).
2. The ultra-large target surface high-definition imaging system according to claim 1, characterized in that, -3.923<(R2+R3) / (R2-R3)<-2.
922.
3. The ultra-large target surface high-definition imaging system according to claim 1, characterized in that, 0.3440<∑CT / TTL<0.6450.
4. The ultra-large target surface high-definition imaging system according to claim 1, characterized in that, 0.632 <ct1 / ct2<0.937。 5. The ultra-large target surface high-definition imaging system according to claim 1, characterized in that, 0.642 <TTL / f<3.842。 6. The ultra-large target surface high-definition imaging system according to claim 1, characterized in that, 0.258 <TL / Dg<2.259。 7. The ultra-large target surface high-definition imaging system according to claim 1, characterized in that, -0.345 <f23 / f4<-0.145。 8. The ultra-large target surface high-definition imaging system according to claim 1, characterized in that, 96.351 <f2 / R3<101.567。 9. The ultra-large target surface high-definition imaging system according to claim 1, characterized in that, 93.045 <f3 / R5<95.046。