Device for suppressing background radiation of medium-long wave infrared hyperspectral remote sensor

Abstract

The invention discloses a device for suppressing background radiation of a medium-long wave infrared hyperspectral remote sensor, which comprises a first refrigerating machine assembly, a second refrigerating machine assembly and a cold box assembly, the first refrigerating machine assembly and the second refrigerating machine assembly are respectively connected with the cold box assembly, and a spectrograph assembly is arranged in the cold box assembly. The spectrograph assembly comprises a first spectrograph, a second spectrograph and a third spectrograph, the first refrigerator assembly is communicated with the first spectrograph and the second spectrograph through a flexible cold chain, the second refrigerator assembly is communicated with the third spectrograph through a flexible cold chain, and a window mounting base is arranged on the cold box assembly. The first spectrograph, the second spectrograph and the third spectrograph are arranged around the window mounting base. Refrigeration is carried out in a two-stage refrigeration mode, the problem that the starting time of a refrigerator is long is effectively solved, vacuum deep hypothermia refrigeration is guaranteed, and background radiation suppression of the medium-long wave infrared hyperspectral remote sensor is effectively achieved.

Description

technical field [0001] The invention relates to the field of infrared detectors, in particular to a refrigeration device for suppressing background radiation of a medium-long wave infrared hyperspectral remote sensor. Background technique [0002] Hyperspectral imaging technology is a remote sensing technology developed in the 1980s. Different from traditional spectrometers, hyperspectral imaging technology integrates image and spectrum (integration of map and spectrum). Simultaneously acquire the continuous and fine spectral information of the target while simultaneously obtaining three-dimensional space image information, which greatly improves the detection ability of space remote sensing. Compared with visible, near-infrared, and short-wave infrared, mid- and long-wave infrared (5.0 μm to 15 μm) hyperspectral imaging technology has unique advantages. The spectral coverage reaches nearly 10,000 nanometers, and it can obtain fine spectral information of the target’s own th...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to solve the problems of the start-up time of the refrigeration device, the improvement of refrigeration efficiency and the reduction of power consumption in the single heat conduction refrigeration mode adopted by the traditional method of suppressing the background radiation of the medium and long-wave infrared hyperspectral remote sensor. The refrigeration device for background radiation suppression of mid- and long-wave infrared hyperspectral remote sensors adopts two-stage refrigeration to avoid the problem of long start-up time of the refrigerator, and performs vacuum deep-low temperature refrigeration to effectively suppress the background radiation of mid- and long-wave infrared hyperspectral remote sensors.

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