Abstract

A calorimeter in the form of a 15° cone has been constructed and evaluated for use as a “black” radiation detector. The internal surface of the cone is coated with colloidal graphite to enhance the absorptance. Spectral emissivity and reflectance measurements of the blackening material are used to estimate the effective absorptance of the conical receiver. To reduce many of the difficulties associated with a dc system, this detector is used with an ac amplifying system at a frequency of 1 cps. The spectral response of three commercial thermocouples is compared with that of the conical receiver.

© 1963 Optical Society of America

Improved Black Radiation Detector*

W. L. Eisenman and R. L. Bates
J. Opt. Soc. Am. 54(10) 1280-1281 (1964)

Information Capacity of Radiation Detectors and of Light

R. Clark Jones
Appl. Opt. 2(4) 351-358 (1963)

Measurement of Absolute Radiation Intensities in the Vacuum-Ultraviolet Region

Einar Hinnov and Fritz W. Hofmann
J. Opt. Soc. Am. 53(11) 1259-1265 (1963)

The Ultimate Sensitivity of Radiation Detectors

R. Clark Jones
J. Opt. Soc. Am. 37(11) 879-890 (1947)

Factors of Merit for Radiation Detectors*

R. Clark Jones
J. Opt. Soc. Am. 39(5) 344-356 (1949)