Radiant energy – Infrared-to-visible imaging
Patent
1989-09-20
1991-02-19
Hannaher, Constantine
Radiant energy
Infrared-to-visible imaging
250332, G01J 500, G02F 100
Patent
active
049946722
ABSTRACT:
An infrared imaging system is described which includes a pyro-optic sensor for receiving a thermal image on one of its sides, the sensor exhibiting a substantial change in refractive index in responses to changes in its temperature. A light beam is projected onto a second side of the sensor, the beam being selectively, locally reflected by the sensor in accordance with local changes in its refractive index. A receiver detects the reflected beam and responds to the reflectance changes to derive a visible image of the thermal image.
The pyro-optic sensor comprises a sandwich structure which includes a film of energy absorbant material upon which the thermal image is received; a thin film of thermal-optic material; and a supporting layer which includes an optically transparent foam positioned next to the pyro-optic material on the side at which is directed an interrogating light beam.
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Ainger Frank
Bhalla Amar S.
Cross Leslie E.
Damjanovic Dragan
Glick Edward J.
Hannaher Constantine
Pennsylvania Research Corp.
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