Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1994-11-30
1995-09-12
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
359241, H01J 314, H01J 516, H01J 4014
Patent
active
054499046
ABSTRACT:
A passive broadband sensor protection and enhancement system and technique. ncident light is focused with a cylindrical lens on the optical axis into an intense light strip onto the input face of a photorefractive crystal on the optical axis. The crystal includes optional anti-reflection coatings proximate to the input and output face. A broadband high reflection coating is proximate to the input face for reflection of all radiation from approximately 0.68 to at least out to 1.5 micrometers wavelength. Light exiting from the output face of the crystal results from a photorefractive process that includes a transmitted beam and beam fan. The beam fan is fanned out of the optical path in a direction determined by the c-axis, dominant electro-optic coefficient, and charge carriers participating in the photorefractive process. The transmitted beam contains only incoherent radiation as input to a sensitive detector resulting in broadband multiline protection from the visible spectrum for substantially all pulsewidths and cw lasers, with enhanced time response and interaction length.
REFERENCES:
patent: 4846561 (1989-07-01), Soileau, Jr. et al.
patent: 4909609 (1990-03-01), McDowell
patent: 5073705 (1991-12-01), Sharp et al.
patent: 5080469 (1992-01-01), McCahon et al.
patent: 5280169 (1994-01-01), Honey et al.
patent: 5283697 (1994-01-01), Tutt et al.
patent: 5301069 (1994-04-01), Wood et al.
Clark, III William W.
Miller Mary J.
Monson Brian D.
Salamo Gregory J.
Sharp Edward J.
Bashore Alain L.
Calogero Stephen
Lane Anthony T.
Lee Milton W.
The United States of America as represented by the Secretary of
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