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Ultra-high sensitivity medium-wave cooling infrared athermal lens and its working method

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

Active Publication Date: 2019-01-29
FUJIAN FUGUANG TIANTONG OPTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 cooling infrared athermal lens and its working method
  • Ultra-high sensitivity medium-wave cooling infrared athermal lens and its working method

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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 mechanical athermalization adjustment function. Ring 2, fixing piece 3, second telescopic ring 4, the lens i...

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Abstract

The invention relates to an ultra-high-sensitivity medium-wave cooling infrared athermalization lens and its working method. The ultra-high-sensitivity medium-wave cooling infrared athermalization lens is characterized in that: the optical structure of the lens is along the light incident direction A negative crescent lens A, a negative crescent lens B, and a positive crescent lens C are arranged in this order. The ultra-high-sensitivity medium-wave cooling infrared athermalization lens has the advantages of wide field of view, low distortion, mechanical athermalization and athermalization compensation, and light structure; it uses the thermal expansion and contraction characteristics of mechanical materials at different temperatures to compensate The influence of temperature changes on the focal plane makes the athermal design structure simpler, the overall product structure is smaller, lighter in weight, the optical axis is stable, the image is clearer, and the reliability is high. In terms of meeting the user's requirements for product imaging performance, the structure It is also more convenient for customers to use.

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 Patents(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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