Sharp G D, Johnson K M, Doroski D
Opt Lett. 1990 May 15;15(10):523-5. doi: 10.1364/ol.15.000523.
A new continuously tunable color filter, which uses smectic A() liquid-crystal half-wave plates, is described and experimentally demonstrated. Multiple-stage Lyot filters with broad tunability and high finesse can be constructed with this design. The transmission characteristics of a single-stage filter, which is continuously tuned over 115 nm of the visible spectrum, are presented. Experimental results are compared with computer simulations, and they show excellent agreement. The advantages of the smectic A() liquid-crystal tunable filter over existing filter structures include low switching voltages (+/-30 V), rapid tunability (10 MHz), potentially high transmission, wide field of view, and large aperture.
本文描述并通过实验演示了一种新型连续可调谐滤色器，该滤色器使用近晶A（）液晶半波片。利用这种设计可以构建具有宽可调性和高精细度的多级利奥特滤光片。给出了在可见光谱115纳米范围内连续调谐的单级滤光片的传输特性。实验结果与计算机模拟进行了比较，两者显示出极佳的一致性。近晶A（）液晶可调谐滤光片相对于现有滤光片结构的优点包括低开关电压（±30V）、快速可调性（10MHz）、潜在的高透射率、宽视场和大孔径。
