MEASUREMENT OF THE TIME-VARYING COMPONENT OF RADIATION FROM INFRARED SOURCES
MICHIGAN UNIV ANN ARBOR ANN ARBOR
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Techniques for the calibration of a temporal radiometer were studied. The calibration described for either periodic or random fluctuations utilizes sinusoidally modulated radiation from a blackbody. A complete description is given of the data acquisition and analysis facilities which were assembled for this study and used to calibrate a test radiometer. The practical aspects of spectral analysis including the interplay among filter bandwidth, scan rate, data sample length, and averaging time are discussed, and a technique for measuring the noise equivalent bandwidth of the frequency-selective filter in the spectrum analyzer is described.