Hadamard transform imaging spectrometer

Abstract

The invention relates to a Hadamard transform imaging spectrometer, which overcomes the defects that after-treatment workload is large, the enhancement function on a certain characteristic spectral coverage cannot be realized, the coding precision is low, the volume is big and the requirements on processing and debugging are high in the prior art. The Hadamard transform imaging spectrometer comprises a preposed imaging system, a first collimating lens, a light-splitting device, a first convergent lens, a digital micromirror device, a second collimating lens, a light-converging device, a secondconvergent lens and an image surface detector; the preposed imaging system comprises a preposed imaging lens; the first collimating lens, the light-splitting device, the first convergent lens and thedigital micromirror device form a light-splitting modulation system; the second collimating lens, the light-converging device, the second convergent lens and the image surface detector form a light-converging imaging system; and the composition of the first collimating lens is the same as that of the first convergent lens, and the composition of the second collimating lens is the same as that ofthe second convergent lens. The Hadamard transform imaging spectrometer has the advantages of small volume, high coding precision and the like.

Description

technical field [0001] The invention relates to a Hadamard transform imaging spectrometer, in particular to a Hadamard transform imaging spectrometer that can be used for area array imaging or line array imaging. Background technique [0002] Spectral imaging technology integrates spectral technology and imaging technology. It began in the 1980s. It can not only achieve target imaging but also measure target spectral characteristics, realize comprehensive detection and identification of target characteristics, and be used in resource detection, environmental monitoring and space. Target recognition and other fields have advantages that other remote sensing technologies cannot replace. [0003] The theoretical basis of the Hadamard transform spectrometer comes from the French mathematician Jacques Hadamard, who proposed a weight design method, which enables the measurement error to be optimally controlled and reduced after measuring a set of targets. In the 1940s, Golay syst...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a Hada code transformation imaging spectrometer using a digital micromirror device as an optical path gating element, so as to overcome the heavy post-processing workload in the prior art and the inability to enhance a certain characteristic spectrum Function, low encoding accuracy, large volume and high requirements for processing and adjustment

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