Fisheye lens
By using a specially configured combination of glass lenses and aperture design, the compatibility issues of miniaturization, high resolution, and wide-angle in automotive lenses have been resolved, achieving panoramic effects and high-resolution fisheye lenses that can adapt to environmental changes over a wide temperature range.
Patent Information
- Application Number
- CN202520377048.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-03-05
AI Technical Summary
Existing automotive lenses struggle to achieve a balance between miniaturization, high resolution, and wide-angle capabilities, especially under waterproofing requirements.
Design a fisheye lens that employs a specific configuration of glass lens combination, including first to seventh glass lenses with focal lengths of negative, negative, negative, positive, positive, negative, and positive, an aperture stop between the fourth and fifth glass lenses, and aberration correction through the lens combination, using low dispersion material to improve image quality.
It achieves miniaturization while meeting panoramic requirements, improves user experience, maintains high resolution and high image quality at a wide angle, and adapts to environmental changes over a wide temperature range.
Smart Images
Figure CN223742846U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to optical system technical field, concretely relates to a fish eye lens. BACKGROUND
[0002] At present, the field of automobile has new requirements on the lens on iteration again and again, such as requiring miniaturization high pixel while requiring waterproof, therefore, how to design a big wide angle, micro, high pixel lens is the problem to be solved at present. INVENTION CONTENTS
[0003] The utility model discloses at least one of the above technical problems is solved to some extent.
[0004] The utility model discloses the technical scheme that adopts:
[0005] A fish eye lens, including first glass lens, second glass lens, third glass lens, fourth glass lens, fifth glass lens, sixth glass lens and seventh glass lens that are sequentially arranged from object side to image side, the focal length of glass lens is negative, negative, negative, positive, negative, negative, positive in turn, and the diaphragm is arranged between the fourth glass lens and the fifth glass lens.
[0006] Preferably, the curvature radius of the first surface of the first glass lens is 12.98-14.03mm, and the curvature radius of the second surface is 6.48-6.63mm.
[0007] Preferably, the curvature radius of the first surface of the second glass lens is infinite, and the curvature radius of the second surface is 13.37-13.52mm.
[0008] Preferably, the curvature radius of the first surface of the third glass lens is -9.17--9.32mm, and the curvature radius of the second surface is 2.89-3.04mm.
[0009] Preferably, the curvature radius of the first surface of the fourth glass lens is 6.32-6.47mm, and the curvature radius of the second surface is -8.26--9.41mm.
[0010] Preferably, the curvature radius of the first surface of the fifth glass lens is 4.37-4.52mm, and the curvature radius of the second surface is -2.19--2.34mm.
[0011] Preferably, the curvature radius of the second surface of the sixth glass lens is 2.6-2.75mm.
[0012] Preferably, the first surface of the seventh glass lens has a radius of curvature of 3.66-3.81mm, and the second surface has a radius of curvature of -5.33--5.48mm.
[0013] The fish-eye lens has the advantages that:
[0014] The fish-eye lens has the advantages that: BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 is a schematic view of the fish-eye lens of the utility model.
[0016] Figure 2 is a schematic view of the fish-eye lens of the utility model.
[0017] Figure 3 is an Mtf diagram of the fish-eye lens of the utility model.
[0018] Figure 4 is an Mtf focusing curve diagram of the fish-eye lens of the utility model.
[0019] Figure 5 is a dot matrix diagram of the fish-eye lens of the utility model.
[0020] Figure 6 is a relative diagram of the fish-eye lens of the utility model.
[0021] In the figure: 1-first glass lens; 2-second glass lens; 3-third glass lens; 4-fourth glass lens; 5-fifth glass lens; 6-sixth glass lens; 7-seventh glass lens; 8-diaphragm. DETAILED DESCRIPTION
[0022] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as a limitation of the utility model. The components of the embodiments of the utility model described and shown in the drawings herein can be arranged and designed in various different configurations.
[0023] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the communication inside two elements.
[0024] The utility model will be further explained in connection with the drawings and specific embodiments.
[0025] As Figure 1 shown, the fisheye lens of the embodiment comprises first glass lens 1, second glass lens 2, third glass lens 3, fourth glass lens 4, fifth glass lens 5, sixth glass lens 6 and seventh glass lens 7 arranged in order from object side to image side, and the focal length of glass lens is negative, negative, negative, positive, positive, negative and positive in turn; the fourth glass lens 4 and the fifth glass lens 5 are provided with diaphragm 8.
[0026] The first glass lens 1, the second glass lens 2, the fifth glass lens 5, the sixth glass lens 6 play the role of correcting distortion; through the combination of the first glass lens 1, the second glass lens 2, the third glass lens 3, the fourth glass lens 4, the fifth glass lens 5, the sixth glass lens 6 and the seventh glass lens 7 with even aspheric surface, spherical aberration, coma, astigmatism, field curvature and other aberrations can be effectively corrected, so as to improve the resolving power of the lens, and at the same time, the aberration is reduced through the matching of dispersion coefficient, and the image quality can be further improved through high-precision lens barrel, so as to achieve ideal resolving power.
[0027] As Figure 2 shown, the curvature radius R1 of the first surface of the first glass lens 1 is 12.98-14.03mm, and the curvature radius R2 of the second surface is 6.48-6.63mm. The curvature radius R3 of the first surface of the second glass lens 2 is infinite, and the curvature radius R4 of the second surface is 13.37-13.52mm. The curvature radius R5 of the first surface of the third glass lens 3 is -9.17--9.32mm, and the curvature radius R6 of the second surface is 2.89-3.04mm. The curvature radius R7 of the first surface of the fourth glass lens 4 is 6.32-6.47mm, and the curvature radius R8 of the second surface is -8.26--9.41mm. The curvature radius R10 of the first surface of the fifth glass lens 5 is 4.37-4.52mm, and the curvature radius R11 of the second surface is -2.19--2.34mm. The curvature radius R12 of the second surface of the sixth glass lens 6 is 2.6-2.75mm. The curvature radius R13 of the first surface of the seventh glass lens 7 is 3.66-3.81mm, and the curvature radius R14 of the second surface is -5.33--5.48mm.
[0028] More parameters of each lens are shown in table 1.
[0029] Table 1 lens parameters
[0030] Surface number Surface type Radius of curvature Thickness / distance Refractive index Dispersion coefficient S1 Standard surface 12.98～14.03 0.62～0.77 1.793～1.85 35.946～37.996 S2 Standard surface 6.48～6.63 1.90～2.05 S3 Standard surface Infinite 0.62～0.77 1.793～1.85 35.946～37.996 S4 Standard surface 13.37～13.52 0.85～0.99 S5 Standard surface -9.17～-9.32 0.63～0.78 1.5588～1.671 54.312～57.392 S6 Standard surface 2.89～3.04 5.12～5.27 S7 Standard surface 6.32～6.47 3.43～3.58 1.6824～1.8113 26.946～28.996 S8 Standard surface -8.26～-9.41 0.67～0.78 ST0 Standard surface Infinite 0.05～0.20 S10 Standard surface 4.37～4.52 1.40～1.55 1.629～1.789 48.508～50.568 S11 Standard surface -2.19～-2.34 1.20～1.35 1.829～1.989 22.508～25.568 S12 Standard surface 2.60～2.75 0.25～0.40 S13 Standard surface 3.66～3.81 3.03～3.18 1.729～1.959 43.508～48.568 S14 Standard surface -5.33～-5.48 0.10～0.25
[0031] The fisheye lens of the embodiment is optimal for imaging at wavelengths of 400nm-700nm, while meeting the requirement of panorama. The light angle is above 200 degrees, and the specific test results are shown in the table Figures 4 to 6
[0032] The fisheye lens of the embodiment is a fixed focus lens, with a focal length of 1.2-1.42, an aperture of 1.8-2.2, and a total length of 20.3-23.9, while ensuring high resolution; temperature compensation design is adopted, and the lens can work in an environment of-40℃-+80℃ without defocus; positive and negative lens power are mutually compensated, which not only ensures the performance of the optical system, but also reduces the processing cost of parts, simplifies the structure, reduces the weight, is conducive to mass production, meets market demand, and improves the picture quality while using low dispersion materials.
[0033] The utility model is not limited to the above optional implementation, and anyone can derive other various forms of products under the inspiration of the utility model, but no matter any change in shape or structure, any technical scheme falling within the scope defined by the claims of the utility model falls within the protection scope of the utility model.
Claims
1. A fisheye lens characterized by: The lens comprises first glass lens (1), second glass lens (2), third glass lens (3), fourth glass lens (4), fifth glass lens (5), sixth glass lens (6) and seventh glass lens (7) arranged in turn from object side to image side, the focal length of glass lens is negative, negative, negative, positive, positive, negative, positive in turn; the fourth glass lens (4) and the fifth glass lens (5) are provided with diaphragm (8) between.
2. The fisheye lens according to claim 1, characterized in that: The curvature radius of the first surface of the first glass lens (1) is 12.98-14.03mm, and the curvature radius of the second surface is 6.48-6.63mm.
3. The fisheye lens according to claim 1, characterized in that: The curvature radius of the first surface of the second glass lens (2) is infinite, and the curvature radius of the second surface is 13.37-13.52mm.
4. The fisheye lens of claim 1, wherein: The curvature radius of the first surface of the third glass lens (3) is -9.17--9.32mm, and the curvature radius of the second surface is 2.89-3.04mm.
5. The fisheye lens of claim 1, wherein: The curvature radius of the first surface of the fourth glass lens (4) is 6.32-6.47mm, and the curvature radius of the second surface is -8.26--9.41mm.
6. The fisheye lens of claim 1, wherein: The curvature radius of the first surface of the fifth glass lens (5) is 4.37-4.52mm, and the curvature radius of the second surface is -2.19--2.34mm.
7. The fisheye lens of claim 1, wherein: The curvature radius of the second surface of the sixth glass lens (6) is 2.6-2.75mm.
8. The fisheye lens of claim 1, wherein: The curvature radius of the first surface of the seventh glass lens (7) is 3.66-3.81mm, and the curvature radius of the second surface is -5.33--5.48mm.