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Blackbody source in the −50 to +200°C range for the calibration of radiometers and radiation thermometers

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Abstract

A high-accuracy, large-aperture calibration source for radiometers and infrared radiation pyrometers operating in the range from −50 to +200°C is described. It is shown that by means of reflecting surfaces inside the blackbody the requirements for temperature uniformity can be substantially relaxed while high accuracy in the characterization of the effective temperature is maintained.

© 1991 Optical Society of America

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