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首页> 美国政府科技报告 >Theoretical Investigation of Electrically Tunable Birefringent Optical Filters asthe Spectral Discriminator in Hyperspectral Imaging Systems
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Theoretical Investigation of Electrically Tunable Birefringent Optical Filters asthe Spectral Discriminator in Hyperspectral Imaging Systems

机译：光谱鉴别器在高光谱成像系统中的电可调双折射光学滤波器的理论研究

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This study investigated electrically tunable birefringent optical filters for useas the spectral discriminator in hyperspectral imaging systems. Spectral discrimination requirements for hyperspectral systems were defined using specification from two state-of-the-art hyperspectral imaging systems. The spectral discrimination requirements led to the definition of the ideal tunable optical filter for spectral discrimination purposes. Analytical and computer an analysis was performed for known birefringent filters which showed promise of electrical tunability excluding acousto-optic filters. No perfect match was found to the ideal tunable optical filter for hyperspectral imaging defined in this thesis. Both Lyot and Solc based filters exhibited two drawbacks for hyperspectral imaging application: narrow tuning range with linear bandwidth dependence on center wavelength, or wide tuning range and quadratic bandwidth dependence on center wavelength. The An-tuned Solc filter provided the best compromise between tuning range and bandwidth control however, it is not practical due to the excessive number of elements required. This thesis provides the needed background for further research in this area and identifies a number of areas for further worthwhile research. Acousto-optic filters offer another possible avenue for hyperspectral imaging and should be investigated. Birefringent materials should also be studied to determine material limits on the electro-optic effect and spectral transmission characteristics to determine practical capabilities of filters discussed in this thesis. Birefringence, Filters, Multispectral, Imaging, Optical filters.

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