Ultra-high sensitivity medium wave refrigeration infrared athermalization lens and work method thereof

A sensitivity and lens technology, applied in installation, optics, instruments, etc., can solve the problems of indistinguishable objects with subtle differences, slow response speed, low sensitivity, etc., and achieve the effect of high resolution, light lens, and low distortion.

Active Publication Date: 2016-11-16
FUJIAN FUGUANG TIANTONG OPTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The detectors used by ordinary long-wave infrared lenses have a wide detection band and can work at normal ambient temperatures without cooling, but have low sensitivity and slow response speed, and cannot distinguish objects with subtle differences, while military quantum detectors must cool down

Method used

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  • Ultra-high sensitivity medium wave refrigeration infrared athermalization lens and work method thereof
  • Ultra-high sensitivity medium wave refrigeration infrared athermalization lens and work method thereof

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] Such as Figure 1~2 As shown, the ultra-high-sensitivity medium-wave cooling infrared athermalization lens of the present invention has a negative crescent lens A, a negative crescent lens B and a positive crescent lens C in the optical structure along the incident direction of light.

[0025] In this embodiment, the air gap between the negative crescent lens A and the negative crescent lens B is 1.5 mm, and the air gap between the negative crescent lens B and the positive crescent lens C is 16 mm.

[0026] In this embodiment, the mechanical structure of the lens mainly includes the main lens barrel 8, the outer cover 6, the limit pressure ring 1, the front pressure ring 10, the elastic gasket 5 and the first telescopic lens for the mechanical athermalization adjustment function. Ring 2, fixing part 3, second telescopic ring 4, the lens...

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Abstract

The invention relates to an ultra-high sensitivity medium wave refrigeration infrared athermalization lens and a work method thereof. The ultra-high sensitivity medium wave refrigeration infrared athermalization lens is characterized in that the optical structure of the lens successively comprises a negative crescent lens A, a negative crescent lens B, and a positive crescent lens C along a light incidence direction. The ultra-high sensitivity medium wave refrigeration infrared athermalization lens has the advantages of wide field angle, low distortion, mechanical athermalization compensation, portable structure, etc., utilizes the thermal expansion and contraction characteristic of mechanical materials under different temperatures to compensate for the temperature change influence on a focal plane, allows an athermalization design structure to be simpler, a whole product structure to be smaller and lighter, and optical axis stable imaging to be clearer and more reliable, and is more convenient to use under the condition of meeting user demands on product imaging performance.

Description

technical field [0001] The invention relates to the technical field of optical lens devices, in particular to an ultra-high-sensitivity medium-wave cooling infrared athermalization lens and a working method thereof. Background technique [0002] The infrared lens has the characteristics of strong anti-interference ability and can work day and night in harsh weather. The detectors used by ordinary long-wave infrared lenses have a wide detection band and can work at normal ambient temperatures without cooling, but have low sensitivity and slow response speed, and cannot distinguish objects with subtle differences, while military quantum detectors must cool down. After refrigeration, the response time can be shortened and the detection sensitivity can be improved. A cryogenic refrigerator is integrated into the imaging sensor of modern cooled thermal imagers. This device cools down the sensor. Lowering the temperature of the detector makes the signal of thermal noise lower ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/14G02B13/00G02B7/02
CPCG02B7/021G02B7/022G02B7/023G02B7/026G02B7/028G02B13/001G02B13/146
Inventor 刘涛肖维军仇力郑勇强周阳
Owner FUJIAN FUGUANG TIANTONG OPTICS
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