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Method and system for multi-spectral imaging in the visible and infrared spectrums
Method and system for multi-spectral imaging in the visible and infrared spectrums
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机译:在可见光谱和红外光谱中进行多光谱成像的方法和系统
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摘要
Multi-spectral images are detected using a refractive objective lens system. Magnesium oxide (MgO) and calcium fluoride (CaF2) lenses are used to image scenes in both the visible and infra-red (IR) spectrums. The inventors have discovered that the combination of magnesium oxide, only recently made available in a pure crystal form, and calcium fluoride can be used to fabricate an objective lens for imaging objects in both the visible and infra-red spectrums. Moreover, the combination of magnesium oxide and calcium fluoride results in a super-achromatic condition across visible and infra-red spectrums. This chromatically-corrected spectral range includes wavelengths between 0.4 and 5.9 microns which covers medium-wave IR (MWIR), short-wave IR (SWIR), and the near-IR/visible windows. Combinations of MgO and CaF2 lenses are used in different compound objective lens designs including doublet, Petzval, inverted telephoto, and telephoto arrangements. Visible and/or IR applications for the multi-spectral objective lens system include telescopes, reconnaissance planes, satellites, forward-looking IR (FLIR) and staring sensor systems, night-vision goggles, and other optic and/or electro-optic detection systems.
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