Electrically tunable infrared filter based on a cascaded liquid-crystal Fabry-Perot for spectral imaging detection
Electrically tunable infrared filter based on a cascaded liquid-crystal Fabry-Perot for spectral imaging detection
复制标题
基于级联液晶法布里-珀罗的电可调红外滤光片，用于光谱成像检测
DOI：
10.1364/ao.56.001925
复制
发表时间：
2017-03-01
期刊：
影响因子：
1.9
通讯作者：
Xie, Changsheng
中科院分区：
文献类型：
--
作者：
Lin, Jiuning;Tong, Qing;Xie, Changsheng
提出了一种基于关键级联液晶法布里-珀罗（C-LC-FP）的电调谐红外滤波器，工作波长范围为3-5 μ m。C-LC-FP由两个FP微腔紧密堆叠而成，两个微腔的深度分别为12 μ m和15 μ m，并完全填充有C-LC材料。通过两个微腔的连续波长选择，具有高透射率和窄带宽的辐射可以通过滤波器。根据C-LC-FP分子的电控双折射特性，通过在C-LC-FP上施加双电压信号，可以使透射光谱发生偏移。与普通的单微腔LC-FP相比，C-LC-FP具有更好的透射峰形态和光谱选择性能。更具体地，可以分别减少和加宽IR透射峰的数目和偏移范围。(C)2017美国光学学会
An electrically tunable infrared (IR) filter based on a key cascaded liquid-crystal Fabry-Perot (C-LC-FP) working in the wavelength range of 3-5 mu m is presented. The C-LC-FP is constructed by closely stacking two FP microcavities with different depths of 12 and 15 mu m and fully filled by nematic LC materials. Through continuous wavelength selection of both microcavities, radiation with a high transmittance and narrow bandwidth can pass through the filter. According to the electrically controlled birefringence characteristics of nematic LC molecules, the transmission spectrum can be shifted through applying a dual voltage signal over the C-LC-FP. Compared with common LC-FPs with a single microcavity, the C-LC-FP demonstrates better transmittance peak morphology and spectral selection performance. To be more specific, the number and the shifted scope of the IR transmission peak can be decreased and widened, respectively. (C) 2017 Optical Society of America