Optical orientation device for achieving arbitrary distribution through single exposure and preparation method of optical element

Abstract

The invention discloses an optical orientation device for achieving arbitrary distribution through single exposure and a preparation method of an optical element. The optical orientation device comprises a light source, a linear polarized membrane, a pixelate electrically-controlled phase delay device and a phase delay wave plate which are placed sequentially in space, wherein the light source isused for providing light required for optical orientation exposure; the linear polarized membrane is used for changing the light emitted by the light source into linear polarized light of which the polarization direction is parallel to the direction of a linear polarized membrane transmitting axis; the phase delay of each pixel of the pixelate electrically-controlled phase delay device is respectively controlled by corresponding voltage and used for generating the phase delay with arbitrary picture distribution; and a phase retarder is used for generating non-pixelated phase delay. The opticalorientation device for achieving the arbitrary distribution through the single exposure and the preparation method of the optical element have the advantages that the relative optical axis directionsof the linear polarized membrane, pixelate electrically-controlled phase delay device and phase delay wave plate and a phase delay value of each phase delay device are designed, polarization graphs with arbitrary shapes can be generated, and corresponding arrangement contours are formed on a polarization sensitive medium.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a photo-alignment device capable of realizing random distribution in one exposure and a preparation method of an optical element. Background technique [0002] Liquid crystals are widely used in liquid crystal display technology, adjustable liquid crystal photonics devices and other fields due to their advantages such as large optical anisotropy, low power consumption, light weight, and easy electrical, optical, and magnetic adjustments. However, in order to realize the control of liquid crystal, the help of the alignment layer is often needed to arrange the liquid crystal director (the probability and statistics direction of the local liquid crystal optical axis) in a certain direction. The traditional orientation layer is generally obtained by rubbing on a thin layer of polymer material, which will cause pollution to the environment, and the rubbing orientation uniformity is p...

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Problems solved by technology

But they still use the method of mechanically rotating the linear polarizing film to control the polarization di

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