Positive distortion fisheye lens

A fisheye lens and positive distortion technology, applied in the lens field, can solve the problems of low pixel, high noise, and small pixel ratio, etc., and achieve clear and uniform imaging pictures, good infrared confocal performance, and good picture brightness.

Pending Publication Date: 2021-09-21
XIAMEN LEADING OPTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The general fisheye lens has low pixels and insufficient resolution, and the imaging picture is blurred and noisy.
[0004] 2. For general fisheye lenses, due to the wide-angle design requirements, the light transmission is generally not large, and the relative illuminance at the edge of the picture is low
[0005] 3. The general fisheye lens can only support single-visible use or single-infrared use, and cannot achieve a clear state at the same time day and night
[0006] 4. The general fisheye lens has negative f-theta distortion, the distortion is large, the proportion of pixels on the edge is small, and the sense of compression is strong

Method used

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  • Positive distortion fisheye lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] refer to figure 1 As shown, this embodiment discloses an ortho-distortion fisheye lens, which sequentially includes a first lens 1 to a tenth lens 10 along an optical axis from the object side A1 to the image side A2, and the first lens 1 to the tenth lens The lenses 10 each include an object side facing the object side A1 and allowing the imaging light to pass through, and an image side facing the image side A2 and allowing the imaging light to pass through;

[0106] The first lens 1 has a negative refractive power, the object side of the first lens 1 is convex, and the image side is concave;

[0107] The second lens 2 has a negative refractive power, the object side of the second lens 2 is convex, and the image side is concave;

[0108] The third lens 3 has a negative refractive power, the object side of the third lens 3 is concave, and the image side is concave;

[0109] The fourth lens 4 has a negative refractive power, the object side of the fourth lens 4 is conv...

Embodiment 2

[0126] Cooperate Figure 7 to Figure 12 As shown, the concave-convex surface and refractive power of each lens in this embodiment and the first embodiment are roughly the same, and the optical parameters such as the radius of curvature of the lens surface and the thickness of the lens are different.

[0127] The detailed optical data of this specific embodiment is shown in Table 2.

[0128] The detailed optical data of table 2 embodiment two

[0129] surface Types of Caliber size (diameter) radius of curvature thickness material Refractive index Dispersion coefficient focal length OBJ subject surface 0.000 Infinity Infinity 1 first lens 24.671 21.329 1.294 TAF3D 1.80420 46.503 -19.886 2 15.920 8.918 3.296 3 second lens 14.618 13.959 0.700 M-NBFD130 1.80610 40.731 -8.053 4 10.508 4.349 4.054 5 third lens 10.000 -27.510 0.794 H-FK61 1.49700 81.595 -5.727 ...

Embodiment 3

[0135] Cooperate Figure 13 to Figure 18 As shown, the concave-convex surface and refractive power of each lens in this embodiment and the first embodiment are roughly the same, and the optical parameters such as the radius of curvature of the lens surface and the thickness of the lens are different.

[0136] The detailed optical data of this specific embodiment is shown in Table 3.

[0137] The detailed optical data of table 3 embodiment three

[0138] surface Types of Caliber size (diameter) radius of curvature thickness material Refractive index Dispersion coefficient focal length OBJ subject surface 0.000 Infinity Infinity 1 first lens 24.294 19.847 1.294 TAF3D 1.80420 46.503 -18.683 2 15.295 8.326 3.348 3 second lens 14.618 13.959 0.700 M-NBFD130 1.80610 40.731 -8.053 4 10.508 4.349 3.999 5 third lens 10.000 -28.595 0.943 H-FK61 1.49700 81.595 -5.562 ...

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Abstract

The invention discloses a positive distortion fisheye lens, which sequentially comprises a first lens to a tenth lens from an object side to an image side along an optical axis, and each of the first lens to the tenth lens comprises an object side surface and an image side surface; the first lens has a negative refractive index; the second lens has a negative refractive index; the third lens has a negative refractive index; the fourth lens has a negative refractive index; the fifth lens has a positive refractive index; the sixth lens has a positive refractive index; the seventh lens has a positive refractive index; the eighth lens has a negative refractive index; the ninth lens has a positive refractive index; the tenth lens has a negative refractive index; the optical imaging lens has only ten lenses with refractive indexes. According to the invention, 12MP pixels can be supported, a high-definition imaging effect is achieved, and an imaging picture is clear and uniform; the lens can be ensured to have good picture brightness when being used in a night environment; day and night confocal can be realized, day and night dual-purpose is realized, and clear imaging can be ensured in a night mode; the pixel proportion of the lens edge is large, and the compressive sense is small.

Description

technical field [0001] The invention relates to the field of lens technology, in particular to an orthodistortion fisheye lens. Background technique [0002] The front lens of the fisheye lens has a large diameter and protrudes toward the front of the lens in a parabolic shape, which is quite similar to the eyes of a fish, so it is commonly called "fisheye lens". At present, fisheye lenses have been widely used in VR cameras, security monitoring, Video conferencing, drones, vehicles and other fields, therefore, the requirements for fisheye lenses are getting higher and higher. But the existing fisheye lens has at least the following deficiencies: [0003] 1. The general fisheye lens has low pixels and insufficient resolution, and the imaging picture is blurred and noisy. [0004] 2. For general fisheye lenses, due to wide-angle design requirements, the light transmission is generally not large, and the relative illuminance at the edge of the screen is low. [0005] 3. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/14G02B13/18G02B1/00
CPCG02B13/0045G02B13/008G02B13/06G02B13/14G02B13/18G02B1/00
Inventor 张军光潘锐乔黄波
Owner XIAMEN LEADING OPTICS
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