液晶光谱成像技术研究进展

Development of LC-Based Spectral Imaging Technology

液晶光谱成像技术是基于液晶可调滤光片的新型光谱成像技术。利用向列相液晶材料的电控双折射效应,液晶可调滤光片可在工作谱段内进行连续光谱调谐,实现光谱成像系统的小型化、多用途、实时控制。获取高空间分辨率和高光谱分辨率的光谱图像,是今后航天航空遥感的一个重要发展方向。结合液晶光谱成像技术的国内外研究进展,分析了其目前存在的主要问题,并提出了可能的解决途径。展望了液晶光谱成像技术的发展和应用前景。

LC-based spectral imaging is a novel spectral imaging technology using the liquid crystal tunable filter（LCTF）, which is a miniaturized device based on the electrically controlled birefringence of nematic liquid crystal. Continuously tuning through a spectral coverage is realized using LCTF under low voltages. LCTF-based spectral imaging system is a multi-func- tional and real-time system with high spatial resolution and spectral resolution, which represents a new trend in the future of optical remote sensor on aerospace vehicles. Problems and prospects of this technology are analyzed according to the present state of the LC-based spectral imaging technology.