Liquid-crystal bandpass filter based on the optical rotatory dispersion effect.
A bandpass spectral filter and the test measurement results are presented and described. The filter is developed and constructed by use of a ferroelectric liquid-crystal polarization rotator in combination with dispersive quartz optical rotators, and its wavelength selection is mechanically tunable and electrically switchable.
Ye
Chun
C
Measurement and Sensor Laboratory, University of Oulu, Technology Park 127, Fin-87400, Kajaani, Finland. chun.ye@oulu.fi