Fourier transform hyperspectral imaging device based on high speed double reflection rotating mirror

Abstract

The invention relates to an overspeed detection hyperspectral imaging technique, and provides a Fourier transform hyperspectral imaging device based on a high-speed double reflection rotating mirror to solve the problem of nonlinearity caused by an optical path difference of a high-speed rotating mirror transmission type interference spectrometer. The device comprises a collimating mirror, a beamsplitting mirror, a first reflecting mirror, a second reflecting mirror, a first hollow retro-reflector, a second hollow retro-reflector, a detector and the double reflection rotating mirror. Incidentlight is incident on a beam splitter and is divided into reflected light and transmitted light. The reflected light enters the first hollow retro-reflector after being reflected by the first reflecting mirror and the double reflection rotating mirror. Then the reflected light returns back to the double reflection rotating mirror at 180 degrees, and is then reflected to the beam splitter by the double reflection rotating mirror and the first reflecting mirror. The transmitted light enters the second hollow retro-reflector after being reflected by the second reflecting mirror and the double reflection rotating mirror. Then the reflected light returns back to the double reflection rotating mirror at 180 degrees, and is then reflected to the beam splitter by the double reflection rotating mirror and the second reflecting mirror. The interference light generated by the reflected light and the transmitted light is received by the detector.

Description

technical field [0001] The invention relates to the technical field of ultra-speed detection hyperspectral imaging, in particular to a Fourier transform hyperspectral imaging device based on high-speed double-reflection rotating mirrors. Background technique [0002] Imaging spectroscopy technology is a new generation of optical detection technology developed in the 1980s. It takes the spectral analysis theory of objects as the core and integrates optical system design, object imaging technology, photoelectric detectors, signal processing and information mining and spectral information transmission. theory and other techniques. Imaging spectroscopy technology combines the advantages of spectral technology and imaging technology, and can be used to analyze the image and spectral information of the target object. These image information and spectral information constitute the three-dimensional data cube of the target object. In the three-dimensional data cube, the image profi...

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Problems solved by technology

[0024] The purpose of the present invention is to overcome the problems of poor stability and slow measurement speed in existing Michelson interferometers, as well as the problems of non-linear optical path difference, high requirements for rotating mirror materials, and large loss of light energy in high-speed rotating mirror transmission interference spectrometers. , and provide a Fourier transform hyperspectral imaging device based on high-speed double-reflection rotating mirror

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