Harmonic diffractive infrared two band ultra-optical spectrum imaging system

Abstract

The invention provides a harmonic diffraction infrared dual-band hyper-spectral imaging system, belonging to the optical imaging system. The system comprises a dual-band hyper-spectral imaging system with middle-infrared band 3.2-4.8 microns and long-infrared band 8-12 microns, wherein the imaging system comprises a harmonic diffraction lens, an aperture stop, a refrigerating type formed coke plane detector or a non-refrigerating type formed coke plane detector; the position and connection relation of each part is as follows: the harmonic diffraction lens, the aperture stop, the refrigerating type formed coke plane detector or the non-refrigerating type formed coke plane detector are arranged on the same optical axis along the direction of the incident light transmission in sequence; the incident middle-infrared band and long-infrared band which are subjected to light splitting and converging through the harmonic diffraction lens pass through the aperture stop and respectively form image on the refrigerating type formed coke plane detector or the non-refrigerating type formed coke plane detector. The system has the advantages that monochromatic aberration of the system achieves the optimal allocation by optimizing the surface shape parameter of the harmonic diffraction surface and the distance of the harmonic diffraction lens from the aperture stop so as to meet the imaging requirement of the optical system on the middle-infrared wavelength and the long-infrared wavelength.

Description

Technical field: [0001] The invention belongs to an optical imaging system, and relates to an improvement of the information accuracy of a military reconnaissance system, in particular to increasing the information of a reconnaissance system based on a 3.2-4.8 μm and 8-12 μm dual-band refraction / harmonic diffraction hybrid hyperspectral imaging method To improve the accuracy of target detection and recognition. Background technique: [0002] Modern reconnaissance requires an all-weather, high-resolution, real-time transmission reconnaissance system. However, the information obtained by the single-band infrared detection system is weak and the accuracy is low, which can no longer meet the requirements of modern military detection. Infrared hyperspectral reconnaissance instruments can obtain tens to hundreds of channel spectral images in narrow-band spectral bands with adjacent wavelengths and continuous sampling. Using this hyperspectral image data with high spectral resolut...

AI Technical Summary

Problems solved by technology

However, at present, the country does not have the ability to produce long-wave cooling type detection, and it is difficult to purchase from abroad

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