Infrared Light Valve
Original Publication Date: 1980-Aug-01
Included in the Prior Art Database: 2005-Feb-13
A method for controlling the passage of an infrared (IR) light beam as generated, for example, by a gallium arsenide laser, is as follows. A glass cell is constructed with a cavity of approximately 10 microns. The inner surface of the cell walls are treated by any of several standard methods in order to cause a liquid crystal, when introduced into the cell, to be aligned with the long axes of the molecules parallel to the cell walls. Transparent indium-tin oxide electrodes are also deposited on the cell walls.