Large view field staring type spectral imaging system and imaging method thereof

Abstract

The invention relates to a large view field staring type spectral imaging system and an imaging method thereof. A prepositioned object lens and a spectral imaging system of the large view field staring type spectral imaging system are in optical structures which mix refraction and reflection or diffraction and the prepositioned object lens combines gradation dividing and aperture dividing. The imaging method of the large view field staring type spectral imaging system comprises that the prepositioned object lens obtains a two-dimensional middle image with the uniform imaging performance from a huge view field; a multi-view-field, high performance and full-wave-band space image obtained through a multi-aperture sub-view-field and the further aberration fine correction is served as a target object of a follow-up spectral imaging system; aperture channels obtain images which are corresponding to spectrums inside the view field after dispersion light splitting and focus imaging which are performed through the spectral imaging system; images of spectrums in the full view field are obtained after fuse splicing. The large view field staring type spectral imaging system has the advantages of solving the problem that the time is inconsistent due to the fact that the spectral images are obtained through a traditional push and sweep mode and being large in view field, compact in structure, good in spectral imaging quality, strong in light concentrating capability, high in spectral resolution and applicable to aviation and spaceflight hyperspectral remote sensing imaging.

Description

technical field [0001] The invention relates to a staring spectral imaging system and its imaging method for quickly acquiring high-performance spectral images in a large field of view, in particular to a multi-layer sub-aperture structure combining refraction and reflection / diffraction High-resolution spectral imaging system and its imaging method. Background technique [0002] Spectral imaging technology can obtain the third-dimensional spectral information while obtaining the two-dimensional space image of the target object, which can explore the essence of things more deeply and comprehensively. One of the important means, it can be used to complete various tasks, such as remote sensing imaging, object classification and recognition, target detection, industrial production process monitoring and control, food safety and testing, medical diagnosis, land resource investigation, environment and disaster monitoring, etc. It is a major difficulty for this type of imaging sys...

AI Technical Summary

Problems solved by technology

Traditional spectral imaging systems using planar and concave diffraction gratings are limited by aberrations, resulting in low spectral resolution; such systems based on convex gratings can obtain strong aberration balance capabilities by adopting a reasonable optical structure, and then obtain good results. The spatial image and high spectral resolution, but it has an incident slit and the instantaneous field of view is limited. It is necessary to use push-broom imaging to achieve a large imaging field of view. The acquired spectral image has temporal inconsistency and cannot Accurately reflect the real situation in the full field of view at the same time

Therefore, it is difficult to obtain a spectral imaging system with uniform dispersion, high spectral resolution and large field of view at the same time using traditional or existing optical imaging systems

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