Compact grating dispersion spectral imager

Abstract

The invention relates to a compact grating dispersion spectral imager which comprises a front telescopic objective system, a slit, a collimating-imaging system, a reflection grating and an area array detector; by means of the front telescopic objective system, a target imaging function is realized; the slit is a field stop, so that the target imaging range is limited; the collimating-imaging system is not only used for collimating an outgoing beam of a target slit image but also used for imaging parallel light in various wavelengths dispersed by the reflection grating onto the target surface of the detector; the reflection grating is a dispersion component, so that spectral separation of a space target is realized; and the area array detector is used for obtaining and recording digital information by virtue of a photoelectric effect. By means of the manner of sharing the collimating and imaging system, the structure of the traditional dispersion system is simplified.

Description

technical field [0001] The invention relates to a compact grating dispersion spectrum imager, which belongs to the technical field of remote sensing. Background technique [0002] Spectral imaging technology is based on the spectral analysis theory of matter and combines spectral and imaging technologies. During the imaging process, continuous spectral information of dozens or hundreds of bands of ground objects can be obtained with nanoscale spectral resolution. The synchronous acquisition of target spatial information, radiation information, and spectral information forms a three-dimensional data cube. It can directly reflect the geometric image and physical and chemical information of the observed object, realize the comprehensive detection perception and recognition of the target characteristics, greatly expand the target recognition and monitoring capabilities of remote sensing detection technology, and have irreplaceable advantages of other remote sensing technologies....

AI Technical Summary

Problems solved by technology

[0006] For the traditional dispersive hyperspectral imager, the dispersive element needs to work in the collimated optical path. After the target is imaged by the front telescopic objective lens to the slit of the primary image plane, it is first collimated by the collimation system and then split by the dispersive element. The entire optical system is divided into three parts after the imaging system is imaged to the detector target surface. The system is too complicated to reduce the volume and quality, and cannot meet the application requirements of light, small, fast and flexible carrying platforms.

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