光谱学与光谱分析, 2011, 31 (10): 2672, 网络出版: 2011-11-09
可见光液晶光谱成像系统研究
Research on LC-Based Spectral Imaging System for Visible Band
液晶可调滤光片 电控双折射 工作谱段 光谱分辨率 光谱成像系统 LC-based tunable filter Electric controlled birefringence Operating spectral coverage Spectral resolution Spectral imaging system
摘要
利用向列相液晶材料的电控双折射效应, 研制了用于可见光波段光谱调谐的大口径液晶可调滤光片, 透过光谱测试表明, 该滤光片在可见光波段(420～700 nm)以20 nm光谱分辨率可实现连续调谐和任意波长选择。 利用该滤光片搭建了一种小型光谱成像系统, 并在实验室内对若干样品进行了测试, 结果表明, 该系统可同时实现高图像分辨率和高光谱分辨率光谱成像, 具备高、 超光谱分辨率光谱成像的应用潜力, 在生物医学、 环境保护和资源探测等领域具有较好的应用前景。
Abstract
LC-based tunable filter with large aperture has been developed utilizing the effect of electric controlled birefringence. Spectral test indicated that this filter can operate in the visible band with an average 20 nm FWHM. A small scale spectral imaging system was established based on this tunable filter. Spectral imaging experiments on a certain number of samples show that this system can be tuned continuously with random-access selection of any wavelength, and has a higher level of resolving power in respect of both imaging and spectral tuning in the visible band, which has a brilliant application potentiality in biology, iatrology, environmental protection, resource detection through hyper-spectral imaging or ultra-spectral imaging.
沈志学, 李剑峰, 张大勇, 吴军, 龙燕, 黄立贤, 刘海涛, 骆永全, 罗飞, 张翠娟, 杨俊杰. 可见光液晶光谱成像系统研究[J]. 光谱学与光谱分析, 2011, 31(10): 2672. SHEN Zhi-xue, LI Jian-feng, ZHANG Da-yong, WU Jun, LONG Yan, HUANG Li-xian, LIU Hai-tao, LUO Yong-quan, LUO Fei, ZHANG Cui-juan, YANG Jun-jie. Research on LC-Based Spectral Imaging System for Visible Band[J]. Spectroscopy and Spectral Analysis, 2011, 31(10): 2672.
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