Double-incident slit high-resolution imaging spectral system

Abstract

The present invention discloses a double-incident slit high-resolution imaging spectral system. The double-incident slit high-resolution imaging spectral system is composed of double incident slits, a beam splitting subsystem and a detection subsystem; the beam splitting subsystem includes a main reflector, a convex grating, a secondary reflector and a correction lens; and the detection subsystem includes a filter and a surface array detector. The system has the advantages of high resolution, short re-visiting time, lower cost and highly-integrated space system. A double-slit structure enables the system to obtain spectral information of two target areas simultaneously with observation performed for once, so that re-visiting time can be shortened; and the main reflector, the convex grating and the secondary reflector are designed to be concentric, and therefore, the aberration of the system can be reduced, and the resolution of the system can be improved.

Description

technical field [0001] The present invention relates to a double-slit incident imaging spectroscopic system, in particular to a spectroscopic imager with high resolution, high image quality, long slit, and fast revisit time that can be used in ground telescope systems, spaceborne, and airborne spectral imagers Optical system design. [0002] technical background [0003] The spectral imager was developed on the basis of multispectral remote sensing imaging technology in the 1980s. It can obtain super multispectral images of scenes and targets with high spectral resolution, and has a wide range of applications in atmospheric, ocean and land observations. The spectral imager is an organic combination of imaging technology and spectral technology. Through continuous spectral measurement in the continuous imaging space, the "qualitative, quantitative, timing, and positioning" analysis and dynamic process detection of the target can be achieved, and the spatial information of the ...

AI Technical Summary

Problems solved by technology

[0006] In push-broom imaging spectrometers, to achieve high resolution and fast revisit times with guaranteed signal-to-noise ratios, larger systems are often required, as well as more expensive

In the fiber optic imaging spectrometer, on the basis of ensuring that the various performance indicators remain unchanged, expanding the field of view will inevitably increase the volume and cost of the system

[0007] Therefore, it is difficult for current imaging spectrometers to simultaneously satisfy high spectral resolution, high image quality, fast revisit time, low cost, and high integration of space systems.

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