Radiant energy – Infrared-to-visible imaging
Patent
1993-04-19
1994-09-13
Hannaher, Constantine
Radiant energy
Infrared-to-visible imaging
250340, 374 9, G01N 2171, G01N 2500
Patent
active
053471288
ABSTRACT:
Apparatus and process for measuring the variation of directional emittance of surfaces at various temperatures using a radiometric infrared imaging system. A surface test sample is coated onto a copper target plate provided with selective heating within the desired incremental temperature range to be tested and positioned onto a precision rotator to present selected inclination angles of the sample relative to the fixed positioned and optically aligned infrared imager. A thermal insulator holder maintains the target plate on the precision rotator. A screen display of the temperature obtained by the infrared imager, and inclination readings are provided with computer calculations of directional emittance being performed automatically according to equations provided to convert selected incremental target temperatures and inclination angles to relative target directional emittance values. The directional emittance of flat black lacquer and an epoxy resin measurements obtained are in agreement with the predictions of the electromagnetic theory and with directional emittance data inferred from directional reflectance measurements made on a spectrophotometer.
REFERENCES:
patent: 3340722 (1967-09-01), Gabron et al.
patent: 4716293 (1987-12-01), Harrick
patent: 5098195 (1992-03-01), Halyo et al.
patent: 5239488 (1993-08-01), Markham et al.
patent: 5250809 (1993-10-01), Nakata et al.
Alderfer David W.
Daryabeigi Kamran
Puram Chith K.
Wright Robert
Hannaher Constantine
Nelson Wallace J.
Vigyan, Inc.
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