Radiant energy – Calibration or standardization methods
Patent
1996-07-25
1998-05-26
Hannaher, Constantine
Radiant energy
Calibration or standardization methods
250504R, G12B 1300
Patent
active
057569924
ABSTRACT:
A blackbody simulating apparatus which has a blackbody simulator for emitting infrared energy in random directions. A collimator collects a portion of the infrared radiation emitted by the blackbody simulator and then redirects the infrared radiation as a collimated beam of infrared energy to a dielectric. The dielectric has a thin metallic coating affixed to its rear surface to form a mirror like surface at its rear surface. A primary reflection of the collimated beam of infrared energy occurs at the front surface of the dielectric resulting in a first blackbody image being directed to an infrared imager. A portion of the collimated beam passes through the dielectric to the metallic coating and is then reflected by the metallic coating to the front surface of the dielectric emerging from the dielectric as a second blackbody image which is also directed to the infrared imager. Additional blackbody images are generated by internal reflections within the dielectric with each blackbody image having a different intensity from the other blackbody images. This results in at least two different radiance levels being supplied to the infrared imager for calibrating the infrared imager.
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Hannaher Constantine
Kalmbaugh David S.
Sliwka Melvin J.
The United States of America as represented by the Secretary of
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