Infrared scene projector

Details Infrared scene projector Infrared scene projector

1997-03-03

1998-11-17

Anderson, Bruce

Radiant energy

Radiant energy generation and sources

With radiation modifying member

2504951, G01J 100

Patent

active

058380159

ABSTRACT:
A scene projector has spaced-apart optical fibers transmitting electromagnetic radiation by total internal reflection to a like number of spaced-apart absorber structures that are each mounted on the opposite end of one of the optical fibers. The absorber structures absorb the transmitted radiation, convert it to heat, and emit radiation at longer wavelengths, primarily IR. Optionally, a coating having greater emissivity at the longer wavelengths of radiation may be added to the structures to increase radiation at these longer wavelengths. Each optical fiber and absorber structure has a degree of thermal isolation from the adjacent fibers and structures to increase spatial thermal resolution as compared to contemporary monolithic imaging devices. Since the scene projector is optically driven, bulky electronic addressing lines and associated control structure are not needed. Consequently, the fill factor, the active area of pixels to total area, can be very high, over 70%, and pixel size is limited only by the state-of-the-art of lithography and micro-processing techniques.

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Hass, G., Schroeder, H. H., & Turner, A. F. "Mirror Coatings for Low Visible and High Infrared Reflectance," J. Opt. Soc. Am., 1, No. 1, Jan. 1956, 31-35.
Hudson, R. D., Jr. Infrared System Engineering. New York: John Wiley & Sons, 1969, pp. 67-85.

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