Super-large target surface high-definition imaging system
By using a seven-element lens design and optimized optical parameters, combined with aspherical lenses and thermally stable glass, the problems of high resolution, low distortion, and large target area imaging in existing optical lenses have been solved, achieving high-definition imaging and wide-angle adaptation.
Patent Information
- Application Number
- CN202511467490.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-14
- Publication Date
- 2025-12-05
AI Technical Summary
Existing optical lenses are insufficient to meet the requirements of high resolution, low distortion, and good night vision imaging, and are also difficult to adapt to large target surface image sensors to obtain high-quality image information.
It adopts a seven-lens design, including spherical and aspherical lenses, combined with optimized optical parameters and hybrid structure, using glass material with excellent thermal stability, to balance aberration correction, large target area and wide-angle requirements, and control focus drift.
It achieves high-resolution, low-distortion high-definition imaging, meets the requirements of wide-angle and large target area, improves the imaging quality of the lens, and reduces focus drift caused by changes in ambient temperature.
Smart Images
Figure CN121069597A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of optical lens, in particular to a super-large target high-definition imaging system. BACKGROUND
[0002] Optical lens is a kind of precision optical device that uses lenses (or lens groups) to focus, image or change light path, which is widely used in photography, video, microscopy, telescopes, medical endoscopy, machine vision, laser processing, AR / VR and other fields, with the rapid development of vision technology, the performance requirements of optical lens are increasingly improved.
[0003] At present, the current optical lens is difficult to meet the needs of high resolution, low distortion and good night vision imaging, and with the improvement of shooting requirements, the optical lens not only needs to have wide angle to cover a larger range, but also needs to adapt to large target image sensor to obtain higher quality image information. SUMMARY
[0004] The purpose of the present application is to solve the problem that the traditional optical lens is difficult to meet the needs of high resolution, low distortion and good night vision imaging, and a super-large target high-definition imaging system is provided.
[0005] The present application provides the following technical scheme: A super-large target high-definition imaging system, comprising an optical lens group, the optical lens group comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in order from the object side to the image side, wherein the object side of the first lens to the image side of the fifth lens is spherical, the object side of the sixth lens to the image side of the seventh lens is aspherical, the first lens has positive refractive power, the object side thereof is convex at the near axis, the second lens has negative refractive power, the object side thereof is convex, the third lens has positive refractive power, the image side thereof is convex, the fourth lens has positive refractive power, the object side thereof is convex at the near axis, the image side thereof is convex at the near axis, the fifth lens has negative refractive power, the image side thereof is concave, the sixth lens has positive refractive power, the object side thereof is concave, the seventh lens has negative refractive power, the object side thereof is concave, 170.468
[0006] As a preferred embodiment of the present application, -3.923<(R2+R3) / (R2-R3)<-2.922.
[0007] As a preferred embodiment of the present application, 0.3440<∑CT / TTL<0.6450.
[0008] As a preferred embodiment of the present application, 0.632 < ct1 / ct2 < 0.937.
[0009] As a preferred embodiment of the present application, 0.642 < TTL / f < 3.842.
[0010] As a preferred embodiment of the present application, 0.258 < TL / Dg < 2.259.
[0011] As a preferred embodiment of the present application, -0.345 < f23 / f4 < -0.145.
[0012] As a preferred embodiment of the present application, 96.351 < f2 / R3 < 101.567.
[0013] As a preferred embodiment of the present application, 93.045 < f3 / R5 < 95.046.
[0014] Compared with the prior art, the present application provides an ultra-large target surface high-definition imaging system, which has the following beneficial effects: 1. The ultra-large target surface high-definition imaging system adopts a seven-lens design composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, and the surface structure of each lens is combined with the optimized range of optical parameters, so that the requirements of aberration correction, large target surface, large aperture and wide angle are balanced through a mixed structure combined with multiple aspheric surfaces, the central and edge fields have extremely high resolving power, the requirements of high imaging quality and wide angle of the lens are met, and the core part is composed of glass material with excellent thermal stability, which can effectively control the focal point drift problem caused by environmental temperature change and effectively improve the lens quality.
[0015] The parts not involved in the device are the same as or can be realized by the prior art, and the present application solves the problem that the traditional optical lens is difficult to meet the requirements of high resolution, low distortion and good night vision imaging. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the description of the embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn according to the actual proportions.
[0017] Figure 1 A plane structure schematic diagram of an ultra-large target surface high-definition imaging system according to the present application is shown in the figure. Figure 2 A field curvature / distortion of an ultra-large target surface high-definition imaging system according to the present application is shown in the figure. Figure One Figure 3 Axial aberration curve of a super-large target surface high-definition imaging system Figure One ; Figure 4 Field curvature / distortion of a super-large target surface high-definition imaging system Figure Two ; Figure 5 Axial aberration curve of a super-large target surface high-definition imaging system Figure Two ; Figure 6 Field curvature / distortion of a super-large target surface high-definition imaging system Figure Three ; Figure 7 Axial aberration curve of a super-large target surface high-definition imaging system Figure Three ; Figure 8 Field curvature / distortion of a super-large target surface high-definition imaging system Figure Four ; Figure 9 Axial aberration curve of a super-large target surface high-definition imaging system Figure Four .
[0018] In the figure: 1, first lens; 2, second lens; 3, third lens; 4, fourth lens; 5, fifth lens; 6, sixth lens; 7, seventh lens; 8, diaphragm. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.
[0020] Embodiment: Reference Figures 1-2The application discloses a large target surface high-definition imaging system, which comprises an optical lens group, wherein the optical lens group comprises, from an object side to an image side, 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, wherein the surface from the object side of the first lens 1 to the image side of the fifth lens 5 is a spherical surface, the surface from the object side of the sixth lens 6 to the image side of the seventh lens 7 is a non-spherical surface, the first lens 1 has a positive refractive power, the surface on the object side of the first lens 1 is a convex surface at a near-axial position, the second lens 2 has a negative refractive power, the surface on the object side of the second lens 2 is a convex surface, the third lens 3 has a positive refractive power, the surface on the image side of the third lens 3 is a convex surface, the fourth lens 4 has a positive refractive power, the surface on the object side of the fourth lens 4 is a convex surface at a near-axial position, the surface on the image side of the fourth lens 4 is a convex surface at a near-axial position, the fifth lens 5 has a negative refractive power, the surface on the image side of the fifth lens 5 is a concave surface, the sixth lens 6 has a positive refractive power, the surface on the object side of the sixth lens 6 is a concave surface, the seventh lens 7 has a negative refractive power, the surface on the object side of the seventh lens 7 is a concave surface, 170.468 < f / R4 < 173.532, 20.829 < V3-V2 < 23.829, and a diaphragm 8 is arranged between the third lens 3 and the fourth lens 4.
[0021] In some embodiments, the ratio of the overall focal length value of the optical lens group to the curvature radius of the image side of the fourth lens 4 satisfies the following interval: 170.468 < f / R4 < 173.532. The difference between the chromatic aberration coefficient of the third lens 3 and the chromatic aberration coefficient of the second lens 2 satisfies the following interval: 20.829 < V3-V2 < 23.829.
[0022] Through the above ratio, the optimal parameter interval of the lens can be obtained.
[0023] Specifically, in use, by adopting the seven-lens design of 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, and the combination of the optimal range of the surface shape structure and the optical parameters of each lens, the requirements of aberration correction, large target surface, large aperture and wide angle are balanced through the mixed structure and the combination of multiple aspheric surfaces, the central and edge fields both have extremely high resolving power, the requirements of high imaging quality and wide angle of the lens are met, and the core part is composed of glass materials with excellent thermal stability, so that the focal point drift problem caused by the change of the environmental temperature can be effectively controlled, and the quality of the lens is effectively improved.
[0024] In some embodiments, the ratio of the sum of the curvature radii of the image sides of the second lens 2 and the third lens 3 to the difference between the curvature radii of the image sides 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, a ratio of a sum of central thicknesses of the first lens 1 to the seventh lens 7 on the optical axis to the total optical length of the optical lens group satisfies the following interval: 0.3440 <∑CT / TTL < 0.6450.
[0026] In some embodiments, a ratio of the central thickness of the first lens 1 on the optical axis to the central thickness of the second lens 2 on the optical axis satisfies the following interval: 0.632 <ct1 / ct2 < 0.937.
[0027] In some embodiments, a ratio of the total optical length of the optical lens group to the overall focal length value of the optical lens group satisfies the following interval: 0.642 <TTL / f < 3.842.
[0028] In some embodiments, a ratio of a distance between the object-side vertex of the first lens 1 and the imaging surface to the diagonal length of the imaging surface on which the maximum usable angle of view of the optical lens group is imaged satisfies the following interval: 0.258 <TL / Dg < 2.259.
[0029] In some embodiments, a ratio of the focal length of the second lens 2 and the third lens 3 combination to the focal length of the fourth lens 4 satisfies the following interval: -0.345 <f23 / f4 <-0.145.
[0030] In some embodiments, a 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 interval: 96.351 <f2 / R3 < 101.567.
[0031] In some embodiments, a 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 interval: 93.045 <f3 / R5 < 95.046.
[0032] The meaning of the "letter value" in the present application is as follows: TTL: total optical length of the optical lens group; V2: Abbe number of the second lens 2; V3: Abbe number of the third lens 3; ∑CT: sum of central thicknesses of the first lens to the seventh lens on the optical axis; ct1: central thickness of the first lens 1 on the optical axis; ct2: central thickness of the second lens 2 on the optical axis; f: overall focal length value 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: focal length of the second lens 2 and the third lens 3 in combination; TL: distance between the first lens 1 object side vertex and the imaging surface; Dg: diagonal length of the imaging surface at the maximum used view angle of the optical lens group; R2: curvature radius of the image side surface of the second lens 2; R3: curvature radius of the image side surface of the third lens 2; R5: curvature radius of the image side surface of the fifth lens 5; FOV: maximum field of view angle of the optical lens group; Fno: aperture value of the optical lens group.
[0033] Embodiment Two: On the basis of Embodiment One, the specific parameters are selected as f = 15.34 mm, Fno = 1.89, FOV = 62.40°, and the aspherical coefficients are obtained as follows:
[0034]
[0035]
[0036] Specifically, by the data in the above table, the following can be generated: Figure 2 and Figure 3 .
[0037] Embodiment Three: On the basis of Embodiment One, the specific parameters are selected as f = 15.34 mm, Fno = 1.89, FOV = 62.396°, and the aspherical coefficients are obtained as follows:
[0038]
[0039]
[0040] Specifically, by the data in the above table, the following can be generated: Figure 4 and Figure 5 .
[0041] Embodiment Four: On the basis of Embodiment One, the specific parameters are selected as f = 15.343 mm, Fno = 1.889, FOV = 62.380°, and the aspherical coefficients are obtained as follows:
[0042]
[0043]
[0044] Specifically, by the data in the above table, the following can be generated Figure 6 and Figure 7 .
[0045] Example Five: On the basis of example one, the specific parameters are selected as f=15.342mm, Fno=1.888, FOV=62.385° and the aspherical coefficients are obtained as follows:
[0046]
[0047]
[0048] Specifically, by the data in the above table, the following can be generated Figure 8 and Figure 9 .
[0049] The components not described in detail herein are prior art.
[0050] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. An ultra-large target surface high-definition imaging system comprising an optical lens group, characterized in that, The optical lens assembly comprises: 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) arranged in sequence from the object side to the image side, wherein the object side surface of the first lens (1) to the image side surface of the fifth lens (5) are spherical surfaces, the object side surface of the sixth lens (6) to the image side surface of the seventh lens (7) are aspherical surfaces, the first lens (1) has positive refractive power, the object side surface thereof is convex at the paraxial region, the second lens (2) has negative refractive power, the object side surface thereof is convex, the third lens (3) has positive refractive power, the image side surface thereof is convex, the fourth lens (4) has positive refractive power, the object side surface thereof is convex at the paraxial region, the image side surface thereof is convex at the paraxial region, the fifth lens (5) has negative refractive power, the image side surface thereof is concave, the sixth lens (6) has positive refractive power, the object side surface thereof is concave, the seventh lens (7) has negative refractive power, the object side surface thereof is concave, 170.468 < f / R4 < 173.532; 20.829 < V3-V2 < 23.829; a diaphragm (8) arranged between the third lens (3) and the fourth lens (4).
2. The large target high-definition imaging system according to claim 1, wherein, -3.923 < (R2+R3) / (R2-R3) < -2.
922.
3. The large target area high definition imaging system of claim 1, wherein, 0.3440 < ∑CT / TTL < 0.6450.
4. The large target area high definition imaging system of claim 1, wherein, 0.632 < ct1 / ct2 < 0.
937.
5. The large target area high definition imaging system of claim 1, wherein, 0.642 < TTL / f < 3.
842.
6. The large target area high definition imaging system of claim 1, wherein, 0.258 < TL / Dg < 2.
259.
7. The large target area high definition imaging system of claim 1, wherein, -0.345 < f23 / f4 < -0.
145.
8. The large target area high definition imaging system of claim 1, wherein, 96.351 < f2 / R3 < 101.
567.
9. The large target area high definition imaging system of claim 1, wherein, 93.045 < f3 / R5 < 95.046.