phase reversible zone plate

By utilizing the properties of liquid crystal molecular alignment controllable by electric field as well as its optical anisotropy, a new type Fresnel phase waveband plate has been designed.

利用液晶分子取向的电场可控性及光学各向异性的特点，设计了一种新型的菲涅耳位相波带片，这种器件具有制作简单、造价低廉、抗划损的优点。