Design of a spectroscopic system for radiation detection of high-temperature targets over long distances
In this paper,a multi-channel spectral detection system is designed to address the need for multi-spectral radiometric temperature measurement of high temperature targets over long distances.The front end of the system uses a bi-reflective Cassegrain structure to collect the spectral radiation of the target,while the back end includes a long-wave infrared imaging targeting system for target location and a dual-band spectral system operating at 380～1050 nm and 980～2550 nm respectively.The spectral system adopts Czerny-Turner structure,with a resolution better than 5 nm in the 380～1050 nm band and 15 nm in the 980～2550 nm band,and the number of spectral channels is grea-ter than 220.The 400 m target outfield experiments and the 700～2300 ℃ high temperature blackbody temperature experiments show that the multi-channel spectral detection system is capable of targeting and spectral detection of long-range targets.The multi-channel spectral detection system designed in this paper is expected to be used for long-range temperature detection on the ground,in aviation and in space.
optical system designmultispectral radiation thermometryCassegrainCzerny-Turner structure
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