Multi-target imaging spectrograph based on grating moving light modulator (GMLM)

Abstract

The invention relates to a multi-target imaging spectrograph based on a grating moving light modulator (GMLM), and the spectrograph provided by the invention comprises a receiving optical system, a GMLM area array, a beam splitting system, a detector and an embedded system, wherein the radiation information of a target in a field of view is imaged on the GMLM area array by the receiving optical system; the GMLM area array is programmed and driven according to a target radiation source in the field of view, thereby allowing the light radiation of the target radiation source to pass through butshielding the background light; after passing through the beam splitting system, the spectral information of the target radiation source can be focused on the detector; and a signal on the detector is acquired and processed by the embedded system, thereby acquiring the space dimensional information and spectrum dimensional information of the target radiation source. The multi-target imaging spectrograph has the advantages of high speed, flexibility, high sensitivity and adjustable resolution ratio. The multi-target imaging spectrograph provided by the invention can be widely applied to astronomic telescopic systems in the outer space and on ground, and the fields of searching and tracking military targets, and the like.

Description

technical field [0001] The invention relates to a multi-target imaging spectrometer, more specifically, the invention relates to a multi-target imaging spectrometer based on a grating translation light modulator area array manufactured by a micro-opto-electromechanical system. Background technique [0002] Imaging spectroscopy technology is a new type of multi-dimensional information acquisition technology that combines imaging technology and spectroscopy technology. It can obtain the spatial information and spectral information of the detected target and form a three-dimensional data cube. [0003] For a long time, how to simultaneously acquire the spectra of thousands of randomly distributed radiation sources in the field of view of a space telescope has become a difficult problem in space exploration, which requires a large number of spectral data samples. The classic objective prism method is to realize field imaging through a prism with the same numerical aperture size ...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a multi-target imaging spectrometer with high speed, flexibility, high sensitivity and adjustable resolution, which adopts the MOEMS grating translational light modulator GMLM (Grating Moving Light Modulator, patent number ZL200510020186. 8) As the core device of spectrum modulation, it overcomes the disadvantages of high background noise, spectral aliasing, and resolution depending on the numerical aperture of the objective lens of the objective lens prism multi-objective imaging spectrometer, and does not have the disadvantage of difficulty in replacing the template of the traditional mechanical template multi-objective imaging spectrometer. It also does not have the shortcomings of large transmission loss and difficult positioning of fiber-optic multi-target imaging spectrometers

Images