Comparison Between A Side-Viewing Cryogenic Radiometer And Self-Calibrated Silicon Photodiodes

C. C. Hoyt; P. J. Miller; P. V. Foukal; E. F. Zalewski

doi:10.1117/12.960726

26 September 1989 Comparison Between A Side-Viewing Cryogenic Radiometer And Self-Calibrated Silicon Photodiodes

C. C. Hoyt, P. J. Miller, P. V. Foukal, E. F. Zalewski

Proceedings Volume 1109, Optical Radiation Measurements II; (1989) https://doi.org/10.1117/12.960726
Event: SPIE 1989 Technical Symposium on Aerospace Sensing, 1989, Orlando, FL, United States

Abstract

A convenient cryogenic electrical substitution radiometer has been developed for laser radiometry. The radiometer system consists of a side-viewing active cavity receiver of 10 second time constant, a table-top liquid helium cryostat with a Brewster-angle window port, and two digital temperature controllers interfaced with an AT-class microcomputer. Radiometer measurements of an intensity-stabilized laser beam have been compared to measurements taken with silicon photodiodes self-calibrated using a new, non-destructive technique. Agreement between these two techniques of light measurement is obtained at the 0.05% level. The disagreement at the 0.05% level may be significant, and we put forward several possible explanations for future investigation.

Citation Download Citation

C. C. Hoyt, P. J. Miller, P. V. Foukal, and E. F. Zalewski "Comparison Between A Side-Viewing Cryogenic Radiometer And Self-Calibrated Silicon Photodiodes", Proc. SPIE 1109, Optical Radiation Measurements II, (26 September 1989); https://doi.org/10.1117/12.960726

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