日本桃谷大学工程系 T.Uchida领导的研究组已开发一种利用向列液晶双折射特性的可调谐彩色滤光片。其透射波长可通过调节外加电压而连续改变。这种器件能从二维图像信息提取特定波长 ,可用于成像光谱仪。这种窄带彩色滤光片的结构基本上与双折射或Lyot滤光片相同 ,由夹在 4片偏 The research group led by T. Uchida, Department of Engineering, University of Tokyo, Japan, has developed a tunable color filter that utilizes the nematic liquid crystal birefringence properties. Its transmission wavelength can be continuously changed by adjusting the applied voltage. The device extracts specific wavelengths from two-dimensional image information and can be used in imaging spectrometers. The structure of this narrow-band color filter is basically the same as the birefringence or Lyot filter,