Patent ID: 9658512
Date: 2017-05-23
CPC Classifications: G02F,Y10T

Claim:
1. A method of fabricating a cycloidal diffractive waveplate, the method comprising: forming a first substrate; forming a plurality of transparent positive electrodes on the first substrate, and forming a plurality of transparent negative electrodes on the first substrate, the transparent positive electrodes and the transparent negative electrodes being arranged in an alternating series; forming a second substrate without electrodes; and forming a liquid crystal layer between the first substrate and the second substrate, the liquid crystal layer being formed of liquid crystal molecules each having an optical axis with positive dielectric anisotropy and the liquid crystal layer being formed with a periodic molecular structure, and applying an electric voltage to the alternating series of the transparent positive electrodes and the transparent negative electrodes on the first substrate to switch the liquid crystal layer between a diffractive state in which the optical axes of the liquid crystal molecules are periodically rotated across a plane of the waveplate and a non-diffractive state in which the optical axes of the liquid crystal molecules are orientated in the same direction in the plane of the waveplate, wherein the applied electric voltage to the alternating series of the plurality of transparent positive electrodes and the plurality of transparent negative electrodes on the first substrate are configured to produce an electric field in the plane of the waveplate, and wherein the liquid crystal layer is switched between the diffractive state and the non-diffractive state.