Refrigeration-type long-wave infrared imaging spectrometer based on Dyson structure

Abstract

A refrigeration-type long-wave infrared imaging spectrometer based on a Dyson structure belongs to the optical technical field and aims to solve the problems in the prior art that refrigeration equipment with a large volume is required, and a lot of energy sources are required to maintain a low temperature. The refrigeration-type long-wave infrared imaging spectrometer based on the Dyson structure provided by the invention comprises an off-axis three-reverse prepositioned telescope objective, a Dyson grating spectrometer and a secondary imaging lens group, wherein the off-axis three-reverse prepositioned telescope objective comprises three reflecting mirrors and a slit, and radiation information of a target scene is imaged by the three reflecting mirrors at the slit; and the Dyson grating spectrometer disperses images formed at the slit according to different wave lengths and images the image containing multiple pieces of spectral information at a first image plane, and a secondary imaging lens group realizes secondary imaging of exit pupils which are remote from the first image plane and far from each other at the different wave lengths at a cold diaphragm of a detector. The refrigeration-type long-wave infrared imaging spectrometer based on the Dyson structure provided by the invention adopts the method of secondary imaging, realizes the second imaging of the system exit pupils which are far from each other at the different wave lengths at the cold diaphragm of the detector, so that a technical requirement for separate refrigeration of the detector can be satisfied.

Description

technical field [0001] The invention belongs to the field of optical technology, and relates to a cooling type high luminous flux long-wave infrared imaging optical system, in particular to a cooling type long-wave infrared imaging spectrometer based on a Dyson structure. Background technique [0002] Imaging spectrometer is a new type of space atmospheric optical remote sensing instrument developed on the basis of multispectral remote sensing imaging technology. It can acquire super multispectral bands of targets with high spectral resolution. Imaging spectrometers operating in the long-wave infrared band (8-12 μm) have good confidentiality, can work continuously day and night, are less affected by weather, and have strong anti-interference capabilities. They have obvious advantages in material detection and identification. Since the remote sensing signal in the long-wave infrared band is weak, this requires the optical system of the long-wave infrared imaging spectrometer ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a refrigeration-type long-wave infrared imaging spectrometer based on Dyson structure, which solves the problems in the prior art that the refrigeration equipment needs to be bulky and the energy required to maintain low temperature is large

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