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Fish-eye lens

A fisheye lens and lens technology, applied in the lens field, can solve the problems of small image surface, poor day and night switching effect, and failure to satisfy consumers, etc., and achieve high resolution effect, high color reproduction, and small distortion effect

Pending Publication Date: 2019-04-26
XIAMEN LEADING OPTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, fisheye lenses have been widely used in security monitoring, vehicle-mounted and other fields. Therefore, the requirements for fisheye lenses are getting higher and higher. However, the existing ordinary fisheye lenses have a small surface area, low sensor utilization, and poor day-night switching effect. , does not even have the day and night confocal function, and is not suitable for all-weather use. In addition, the optical performance and imaging quality are not ideal enough to meet the growing requirements of consumers

Method used

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Examples

Experimental program
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Effect test

Embodiment 2

[0089] Such as Figure 8 As can be seen, the concave-convex surface and refractive index of each lens in this embodiment and the first embodiment are the same, and only the optical parameters such as the radius of curvature of the lens surface and the thickness of the lens are different.

[0090] The detailed optical data of this specific embodiment are shown in Table 2-1.

[0091] Detailed optical data of Table 2-1 Example 2

[0092] surface

radius of curvature

thickness

material

Refractive index

Dispersion coefficient

focal length

OBJ

subject surface

flat

Infinity

11

first lens

16.20

1.44

Glass

2.00

25.4

-11.2

12

6.34

2.46

21

second lens

13.92

0.73

Glass

1.79

47.5

-8.6

22

4.46

3.76

31

third lens

-7.73

1.90

Glass

1.54

59.7

-16.7

32

-56.8

0 ...

Embodiment 3

[0097] Such as Figure 15 As shown, the concave-convex surface and the refractive power of each lens in this embodiment and the first embodiment are approximately the same, only the image side 32 of the third lens 3 in this embodiment is concave, and the object side 41 of the fourth lens 4 is convex , the object side 61 of the sixth lens 6 is convex and the image side 92 of the ninth lens 9 is convex, and the optical parameters such as radius of curvature and lens thickness of each lens surface are also different.

[0098] The detailed optical data of this specific embodiment are shown in Table 3-1.

[0099] Detailed optical data of the third embodiment of table 3-1

[0100] surface

radius of curvature

thickness

material

Refractive index

Dispersion coefficient

focal length

OBJ

subject surface

flat

Infinity

11

first lens

15.2

1.44

Glass

2.00

25.4

-12.1

12

6.46

...

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Abstract

The invention relates to the technical field of lenses, in particular to a fish-eye lens. The fish-eye lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens along the optical axis from the object side to the image side in sequence; the first lens has the negative refractive index, the object side face ofthe first lens is a convex face, and the image side face of the first lens is a concave face; the second lens has the negative refractive index, the object side face of the second lens is a convex face, and the image side face of the second lens is a concave face. Accordingly, the fish-eye lens has the advantages of being large in image plane, large in wide angle, good in day and night confocal property and good in optical performance and imaging quality.

Description

technical field [0001] The invention belongs to the field of lens technology, and in particular relates to a fisheye lens with good confocal day and night and large image surface. Background technique [0002] A fisheye lens is an ultra-wide-angle lens with a focal length of 16mm or less. The front lens of this 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 known as a "fisheye lens". At present, fisheye lenses have been widely used in security monitoring, vehicle-mounted and other fields. Therefore, the requirements for fisheye lenses are getting higher and higher. However, the existing ordinary fisheye lenses have a small surface area, low sensor utilization, and poor day-night switching effect. , does not even have the day and night confocal function, and is not suitable for all-weather use. In addition, the optical performance and imaging quality are not ideal enou...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/06
CPCG02B13/0015G02B13/06
Inventor 上官秋和
Owner XIAMEN LEADING OPTICS
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