Abstract

A simple device for the measurement of the color temperature of incandescent lamps is described. Two vacuum photo-tubes are used in a balanced bridge circuit with an “electric eye” as an output indicator. No electronic amplification is used.

© 1940 Optical Society of America

A Physical Comparator for the Color Temperatures of Incandescent Lamps*

E. J. King, A. E. Snider, and F. Hamburger
J. Opt. Soc. Am. 42(3) 178-181 (1952)

Photoelectric Color Difference Meter*

Richard S. Hunter
J. Opt. Soc. Am. 48(12) 985-995 (1958)

A Multipurpose Photoelectric Reflectometer

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Operating Temperatures of Vapor Lamps*

J. W. Marden, N. C. Beese, and George Meister
J. Opt. Soc. Am. 30(5) 184-188 (1940)

Photoelectric Measurement of Scale Marks and Spectrum Lines

George R. Harrison and Julius P. Molnar
J. Opt. Soc. Am. 30(8) 343-347 (1940)