Abstract

The heat flow mechanism in thermopile-based electrically calibrated absolute radiometers has been investigated in axial as well as radial directions. Solutions for transient and for steady-state flow of heat and temperature distribution have been obtained. Error functions associated with directional losses have been calculated. It is shown that, due to the inherent difference in the two modes of heating, there is always an undervaluation of radiant power measured.

© 1986 Optical Society of America

Electrically calibrated absolute radiometer suitable for measurement automation

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

Electrically calibrated radiometer using a thin film thermopile

L. P. Boivin and T. C. Smith
Appl. Opt. 17(19) 3067-3075 (1978)

Absolute radiometers (PMO6) and their experimental characterization

Robert W. Brusa and Claus Fröhlich
Appl. Opt. 25(22) 4173-4180 (1986)

Active Cavity Radiometer

Richard C. Willson
Appl. Opt. 12(4) 810-817 (1973)

Intercomparison between two independent primary radiometric standards in the visible and near infrared: a cryogenic radiometer and the electron storage ring BESSY

N. P. Fox, P. J. Key, F. Riehle, and B. Wende
Appl. Opt. 25(14) 2409-2420 (1986)