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US 8,525,943 B2Granted
Optically addressed light valve
AssigneeThe Secretary of State for Defence in Her Brittanic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
InventorChristopher David Burgess
Life of this patent
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Abstract
An optically addressed light valve suitable for selectively limiting the transmission of radiation from high intensity light sources independent of wavelength using a TN liquid crystal cell and a photoconductive material (vanadium doped silicon carbide).
Claims7
An optically addressed light valve (OALV) for limiting transmission of high intensity light comprising:
- an input and an output polarizer;
- a single photoresistor layer and a voltage-dependent polarisation modulator both being sandwiched between first and second transparent electrodes;
- wherein the photoresistor layer comprises an optically transmissive inactive material across broadband and monochromatic wavelengths, including green and red lasers, direct sunlight, and high intensity light sources including ultraviolet and infrared.
Dependencies are inferred from the claim text.