Low-temperature optical mechanical system based on SiC particle reinforced aluminum matrix composite vacuum cooling box

Abstract

The invention discloses a low-temperature optical mechanical system based on a SiC particle reinforced aluminum matrix composite vacuum cooling box. The cooling box is made of light high-modulus SiC particle reinforced aluminum matrix composite. A detector is connected with a corrugated pipe flange to realize five-dimensional adjustment. A light splitting assembly works in a low-temperature stateand is insulated from a heat insulation support through multiple layers. A mechanical refrigerator realizes the refrigeration and vibration reduction functions through a shock absorber, a corrugated pipe and a flexible cold chain. A slit assembly realizes low-temperature work and axial adjustment through a guide rail, the flexible cold chain, an adjusting screw, a heat insulation cylinder and a sealing ring. A telescope assembly is at normal temperature, and fine adjustment is realized through threads. The cooling box is provided with a vacuum gauge pipe, an ion pump, a vacuum flange and a metal valve, so that vacuum measurement, maintenance, temperature measurement, heating and air exhaust sealing are realized. The low-temperature optical mechanical system based on the SiC particle reinforced aluminum matrix composite vacuum cooling box, provided by the invention, has the characteristics of light weight and vibration suppression, and the telescope assembly, the slit assembly and the detector have the capability of being simultaneously adjusted at low temperature in vacuum inside and normal temperature and pressure outside, thereby being suitable for the field of medium and long wavelength spectral imaging detection.

Description

technical field [0001] The present invention relates to medium and long-wave infrared hyperspectral imaging technology, and specifically refers to a low-temperature optical-mechanical system based on SiC particle-reinforced aluminum matrix composite material vacuum cold box, which is applied to spectral imaging in airborne, spaceborne, laboratory and field operations Probe field. Background technique [0002] The imaging spectrometer acquires the solar radiation reflected by ground objects or its own radiation with high spectral resolution, and can analyze and identify the observation target from two aspects of spatial matching and spectral matching. At present, the hyperspectral load in the visible short-wave infrared spectrum (0.4-2.5 μm) in China has been relatively mature after nearly 20 years of development, and has played an important role in the construction of the national economy. However, due to differences in technical systems and weak foundations, hyperspectral ...

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Problems solved by technology

As far as the country is concerned, the requirements for background suppression, background suppression methods, low-temperature refrigeration, low-temperature opto-mechanical solution selection, low-temperature optical-mechanical system lightweight design, vibration suppression and its installation and adjustment for mid- and long-term infrared hyperspectral imagers Testing and other technologies rarely see relevant theoretical analysis and verification

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