Video hyperspectral imager based on array slit scanning

Abstract

The invention discloses a video hyperspectral imager based on array slit scanning. A system comprises an imaging lens, an optical filter, an array slit, a high-precision electric control displacementtable, a dispersion type spectrometer assembly, a detector, a data processing system and the like. The process comprises the steps of fixing the array slit on a high-precision electric control translation stage, and placing the high-precision electric control translation stage at the focal plane position of the imaging lens. By reasonably designing the intervals among the plurality of slits, the detector obtains spectral images of different view field positions at the same time, scanning of multi-view-field space information is achieved by moving the displacement table, and complete imaging spectral data is obtained by combining the data. Compared with a traditional push-broom hyperspectral imaging system, the method has the advantages that surface view field space and spectral informationcan be obtained without platform push-broom, the information obtaining amount in unit time is increased through the array slits, and then the target information obtaining efficiency is greatly improved.

Description

Technical field: [0001] The invention relates to a video hyperspectral imager based on array slit scanning, in particular to a high-precision displacement platform to realize array slit scanning instead of the slits in traditional push-broom imaging spectrometers to realize rapid space scanning without moving platform Imaging hyperspectral imager. Background technique: [0002] Dispersive imaging spectroscopy technology has experienced the technical development process from multi-band scanning imaging to push-broom imaging. At present, the hyperspectral imager based on the push-broom imaging mode is the mainstream solution in aerospace. This technology consists of the solid-state scanning of the area array detector and the steady forward flight of the satellite or aircraft to form a two-dimensional space scan, that is, push-broom imaging. One dimension of the two-dimensional area array device completes the one-dimensional space imaging of the target scene, and the other dim...

AI Technical Summary

Problems solved by technology

However, in some occasions, the platform cannot meet the function of motion scanning. For example, the observation platform near space requires a separate design of the scanning mirror. When the spatial resolution of the hyperspectral imager is high, the difficulty of developing the scanning mirror will increase greatly; Although the hyperspectral imager with slit scanning can save the mobile platform, because the system only has one line of field of view at a time, the efficiency of the system to acquire data is low

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