Near-infrared hyperspectral optical imaging device

Abstract

The invention discloses a near-infrared hyperspectral optical imaging device. The near-infrared hyperspectral optical imaging device comprises a front-arranged objective lens set, a field diaphragm, a collimating lens set and a near-infrared band acousto-optic adjustable light filter, wherein the front-arranged object lens set, the field diaphragm, the collimating lens set and the near-infrared band acousto-optic adjustable light fiber are arranged on the same light path. An imaging lens set and a detector are sequentially arranged on the transmission light path of positive first-order diffraction O light after diffraction by the acousto-optic adjustable light filter, and a light barrier is arranged on the transmission light path of negative first-order diffraction E light after diffraction by the acousto-optic adjustable light filter and zero-order light. The system focal length f',the front-arranged objective lens focal length f2', the collimating lens set focal length f3' and the imaging lens set focal length f4' respectively meet the formulas: f1' / f2'=1, and f3' / f'=-1. The device has the advantages of being simple in structure and light in weight and can be used for the fields of target recognition, abnormal target detection, camouflage target recognition and others under the complex background of a near-infrared waveband reflection spectrum.

Description

technical field [0001] The invention relates to a near-infrared hyperspectral optical imaging device, which can be used in the fields of target recognition, abnormal target detection, camouflage target recognition and the like under complex backgrounds with reflection spectra in the near-infrared band. Background technique [0002] With the rapid development of camouflage technology, the difference between military targets and the natural background is getting smaller and smaller, and the requirements for conventional target detection methods are getting higher and higher. Only relying on the information provided by the traditional single-band and wide-spectrum detection system can no longer meet the needs of modern military. It is necessary to use multi-spectral and hyper-spectral imaging systems to detect potential targets, obtain position estimation and target attributes, and provide information for combat simulation and threat analysis. Provide accurate information and s...

AI Technical Summary

Problems solved by technology

[0008] (2) For the drift of diffraction angle, the reduction of imaging resolution, and the drift of images caused by the dispersion of crystal materials, it is necessary to add a single optical wedge or a combination of multiple optical wedges on the exit end face of the AOTF to eliminate the image caused by dispersion drift, which undoubtedly increases the size and weight of the entire system

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