Abstract

The minimum measurement time needed to obtain a given variance in the mean power measurement is determined for feedback-controlled electrical substitution radiometers by combining previous results for response time and noise power gain with the variance in the mean of a sequence of N partially correlated observations. For large N and high sampling frequencies it is asymptotic to Λ/2 in units of the detector time constant, where Λ is the ratio of the square of the detector noise equivalent power to the desired variance in the mean power measurement. For a second-order system the optimum measurement time for repeated observations is typically 1.4–1.7 times smaller than that for a single observation.

© 1992 Optical Society of America

Response time and noise power gain of electrical substitution radiometers with feedback control

John F. Clare and D. R. White
Appl. Opt. 28(16) 3417-3424 (1989)

Characterization of an absolute cryogenic radiometer as a standard detector for radiant-power measurements

R. U. Datla, K. Stock, A. C. Parr, C. C. Hoyt, P. J. Miller, and P. V. Foukal
Appl. Opt. 31(34) 7219-7225 (1992)

Bolometric detectors: optimization for differential radiometers

Eli N. Glezer, Andrew E. Lange, and Thor M. Wilbanks
Appl. Opt. 31(34) 7214-7218 (1992)

Electrically calibrated absolute radiometer suitable for measurement automation

Louis-Philippe Boivin and Francis T. McNeely
Appl. Opt. 25(4) 554-561 (1986)

Synchrotron-radiation-operated cryogenic electrical-substitution radiometer as the high-accuracy primary detector standard in the ultraviolet, vacuum-ultraviolet, and soft-x-ray spectral ranges

H. Rabus, V. Persch, and G. Ulm
Appl. Opt. 36(22) 5421-5440 (1997)