Dual-channel high-throughput interference imaging spectral device and method

Abstract

The invention provides a dual-channel high-throughput interference imaging spectral device and a method. The device comprises a front optical system, a dual-channel lateral shearing beam splitting system, a first imaging system, and a second imaging system. After incident light passes through the front optical system, a target field of view is determined, stay light is eliminated, collimated light beams are formed, enter the dual-channel lateral shearing beam splitting system and are emitted out through two optical channels, the emergent light of each channel is sheared laterally, and optical path difference information is introduced. A target image with interference fringes is obtained on the target surfaces of detectors at rear focal planes of the two imaging systems, interference information is extracted, and Fourier transform is performed to restore the target image and obtain spectral information of each point of a target and two-dimensional image information of each spectrum. The dual-channel high-throughput interference imaging spectral device of the invention has the characteristics of high luminous flux and dual-channel imaging. By using the lateral shearing interferometry principle of dual-channel beams, double-field stitching can be realized for large-format imaging, and visible-light and infrared dual-channel imaging can be realized.

Description

technical field [0001] The invention belongs to the field of optical imaging, and specifically relates to a dual-channel high-throughput interference imaging spectrum device and method. Using the principle of transverse shearing interference of dual-channel light beams, it can realize double-view field splicing for large-format imaging, and can also realize visible light and Infrared dual-channel imaging. Background technique [0002] Light is the carrier of information. The imager can intuitively obtain the appearance information of the target through the collected optical images, that is, spatial information; the spectrometer can obtain the structural characteristics of the target according to the spectral characteristics, and the imaging spectrometer is an organic combination of the two functions. We put An optical sensor that can simultaneously obtain image information and spectral information of a pixel is called an imaging spectrometer. The essence of imaging spectrosc...

AI Technical Summary

Problems solved by technology

The Sagnac beam splitter adopts a common optical path structure, which is convenient for system installation and adjustment, and has strong anti-noise ability, but it is large in size, which is not conducive to the miniaturization of the system

A beam splitter that uses birefringent crystals to realize transverse shearing can realize the miniaturization of the shearing system, but limited by the birefringent crystal material, the system is limited in infrared band detection

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