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Microcrystalline low-temperature lens and camera using same

A low-temperature, microcrystalline technology, applied in the field of low-temperature lenses, can solve problems that cannot be completely eliminated, and achieve the effects of simple and practical system design, avoiding changes, and simple working principles

Active Publication Date: 2013-06-19
BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above adiabatic technology can only reduce the influence of temperature change on image quality to a certain extent in project implementation, but cannot completely eliminate

Method used

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  • Microcrystalline low-temperature lens and camera using same
  • Microcrystalline low-temperature lens and camera using same
  • Microcrystalline low-temperature lens and camera using same

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Embodiment

[0034] The working spectrum of the all-microcrystalline lens is B1: 5.0~7.6μm, B2: 8.2~12.0μm, entrance pupil diameter: 300mm, F number 1.5, effective field of view is 4°; detector B1 spectrum and B2 spectrum pixels The size is 30μm area array CCD. The primary mirror / four mirrors (1) are concave hyperboloid mirrors, the secondary mirror (3) is convex hyperboloid mirrors, and the third mirror (4) is a convex spherical mirror.

[0035] The working environment temperature for processing, assembly and testing is 293K, and the working environment temperature is 120K.

[0036] In this embodiment, when the temperature drops from 293K to 120K, the deformation of each mirror surface of the all-microcrystalline cryogenic lens is as Figure 2a~2d As shown, the deformation of each mirror surface is symmetrical.

[0037] In this embodiment, the pixel energy concentration of the B1 and B2 spectrum bands of the all-microcrystalline cryogenic lens under 293K and 120K working conditions is as follow...

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Abstract

The invention provides a microcrystalline low-temperature lens and a camera using the same. The microcrystalline low-temperature lens comprises a primary mirror / fourth mirror (1), a primary mirror and secondary mirror connecting structural member (2), a secondary mirror (3), a third mirror (4), a third mirror and fourth mirror connecting structural member (5), a third mirror and image surface component connecting structural member (6), a color separation film (7) and a receiving image surface (8), wherein, the primary mirror / fourth mirror (1), the primary mirror and secondary mirror connecting structural member (2), the secondary mirror (3), the third mirror (4), the third mirror and fourth mirror connecting structural member (5) and the third mirror and image surface component connectingstructural member (6) are made from the same microcrystalline material. By adopting the microcrystalline low-temperature lens, the camera can be machined, installed, debugged and tested at normal temperature and then can perform imaging work at low temperature.

Description

Technical field [0001] The present invention relates to a camera used in a temperature range of 0K to 293K, in particular to a low temperature lens. Background technique [0002] The unique advantages of infrared technology make infrared optical systems widely used in space remote sensing and national defense. The use of infrared spectrum to detect weak targets is an important branch of infrared technology applications, such as infrared astronomical observations. In this type of infrared weak-point target observation, in order to reduce the influence of the optical-mechanical system's own thermal radiation on the detection ability, it is generally necessary to cool the optical system itself, that is, a low-temperature lens is required to meet such detection requirements. [0003] For cryogenic lenses, the lens needs to be processed, assembled, and tested under normal temperature conditions, and then work under low temperature conditions. A huge temperature difference will cause the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/14G02B13/00G02B1/02G02B17/06G03B17/12H04N5/372
Inventor 周峰苏云汤天瑾马军行麦玲张寅生张涛
Owner BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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