According to the electrooptic effect of liquid crystal and the theory of Lyot filter,tunable Lyot liquid crystal filter is designed.Its feasibility is tested by theory and experiment.In order to overcome its disadvantages in infrared band,tunable FP liquid crystal filter is designed and its analogue is given.It is proved that the tunable FP liquid crystal filter has great tuning range and narrow band.%根据液晶的电光效应和 Lyot滤波器的原理设计了Lyot型液晶电光滤波器,并且从理论和实验上证明了其可行性.为了扩展其在红外波段的应用,设计了FP腔液晶可调谐滤波器,并且给出了其理论模拟.理论模拟证明FP腔液晶可调谐滤波器具有调谐范围大、带宽窄、精细度高等优点.
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