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Wide-angle large-target-surface small-distortion optical prime lens

A fixed-focus lens and a large target surface technology, applied in the field of optical lenses, can solve the problems that the monitoring range cannot be met, the scene is easily compressed, and the optical distortion is large, and achieves compact structure, reduced sensitivity, and good imaging quality. Effect

Active Publication Date: 2022-02-08
JIANGXI PHENIX OPTICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, the optical systems used in monitoring, UAV aerial photography or identification technology have gradually developed towards the trend of large target area, high resolution, and small distortion. , the amount of optical distortion will be large, so the scene at the edge of the screen is easy to be compressed, resulting in serious deformation of the object viewed by the user
Or in order to ensure the image quality, the general field of view is small, such as generally less than 60°, which cannot meet the requirements of the monitoring range, and requires the cooperation of multiple lenses to obtain a wider field of view.

Method used

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  • Wide-angle large-target-surface small-distortion optical prime lens
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  • Wide-angle large-target-surface small-distortion optical prime lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] In this embodiment, the lens adopts a 9G2GM structure, the first lens L1, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the ninth lens L9 and The tenth lens L11 is a glass spherical lens, the second lens L2 and the eleventh lens L11 are both molded glass aspheric lenses, and the lens parameters are shown in Table 1:

[0076] Table 1

[0077]

[0078] In Table 1, STOP is the diaphragm, Image is the image plane, and the plane numbers 1-20 represent the numbers of the mirrors that pass through the incident direction of the light from the object plane in turn, and the plane numbers 21 and 22 represent the object side and the side of the filter IR respectively. like profile.

[0079] Among them, the second lens L2 and the eleventh lens L11 are aspherical lenses, and the parameters of each aspheric surface satisfy Table 2:

[0080] Table 2

[0081] Face number k α 2

[0082] According t...

Embodiment 2

[0084] In this embodiment, the lens adopts a 9G2GM structure, the first lens L1, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the ninth lens L9 and The tenth lens L11 is a glass spherical lens, the second lens L2 and the eleventh lens L11 are both molded glass aspheric lenses, and the lens parameters are shown in Table 3:

[0085] table 3

[0086]

[0087] In Table 3, STOP is the diaphragm, Image is the image plane, and the plane numbers 1-20 represent the mirror numbers that pass through the light incident direction from the object plane in turn, and the plane numbers 21 and 22 represent the object side and the side of the filter IR respectively. like profile.

[0088] Among them, the second lens L2 and the eleventh lens L11 are aspherical lenses, and the parameters of each aspheric mirror surface satisfy Table 4:

[0089] Table 4

[0090] Face number k α 2

[0091] According to the ab...

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Abstract

The invention discloses a wide-angle large-target-surface small-distortion optical prime lens which 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, a ninth lens, a tenth lens and an eleventh lens which are sequentially arranged in the light incidence direction. The seventh lens and the eighth lens form a first balsaming lens group, and the ninth lens and the tenth lens form a second balsaming lens group.The shapes of the lenses are reasonably selected, the focal power of each lens is configured, and the focal length range of the lens, the ratio range of the curvature radius of the object side surface of the first lens to the holographic height of the lens, and the ratio range of the holographic height of the lens to the focal length of the lens are limited, so that the lens realizes clear imaging under visible light, does not defocus within the temperature change of-30 DEG C to 70 DEG C, and is beneficial to improving the edge image quality and obtaining high resolution. The field angle reaches 123 degrees, the maximum image surface reaches phi 13 mm, and the lens can be matched with a large-target-surface sensor, and is low in distortion and good in imaging quality.

Description

technical field [0001] The invention belongs to the technical field of optical lenses, and in particular relates to a wide-angle, large-target, small-distortion optical fixed-focus lens. Background technique [0002] In recent years, optical systems used in monitoring, UAV aerial photography or identification technology have gradually developed towards a trend of large target area, high resolution, and small distortion. , the amount of optical distortion will be large, so the scene at the edge of the screen is easy to be compressed, resulting in serious deformation of the object viewed by the user. Or in order to ensure the image quality, the general field of view is small, such as generally less than 60°, which cannot meet the monitoring range requirements, and requires the cooperation of multiple lenses to obtain a wider field of view. In view of this, there is an urgent need to develop a wide-angle lens that supports a large target surface sensor chip, high resolution, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18
CPCG02B13/0045G02B13/06G02B13/18
Inventor 郭冲王立忠
Owner JIANGXI PHENIX OPTICS TECH CO LTD
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