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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。
A new type of Fresnel zone plate is designed using the controllability of the electric field and the optical anisotropy of the liquid crystal molecules. The device has the advantages of simple fabrication, low cost and scratch resistance.