Fast Switching Dual-Frequency Liquid Crystal Cells with High Pretilt Angle, Driven by an Amplitude and Frequency Modulated Voltage
Abstract: In the past, techniques used for switching in devices such as phase modulators, scanners, optical shutters and the like resulted in too long a period for switching between planar and homeotropic configurations of nematic liquid crystal cells. This invention offers a technique to shorten the switching time (for example, 0.1-0.5 ms for a cell of thickness 12 m) making the liquid crystal cell applicable for high-speed optical devices. This invention provides fast reorientation of the liquid crystal within the cell through use of the high pretilt angle between the director and the substrate, dual-frequency nematic liquid crystal, and the driving voltage with special short pulses.
- Phase modulators and retarders
- Beam steering devices, scanners
- Optical shutters, etc.
- Fast switching of liquid crystal cells
Inventors: Dr. Andrii B. Golovin, Dr. Sergii V. Shiyanovskii, Dr. Oleg D. Lavrentovich
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