Abstract

A Beckman DK-2R spectroeflectometer has been modified for obtaining spectral energy distributions of various light sources in the spectral region between 300–2500 mμ. Measurements are made by comparing a test source to a standard source. By including in the circuitry a function generator, which introduces the known energy distribution of the standard source, direct reading of the energy distribution of the test source is obtained. The instrument has been successfully used to measure a variety of light sources, including tungsten lamps, fluorescent lamps, line sources, and natural daylight. It has enough response to measure also sources of intensity as low as one candlepower. Either relative or absolute energy data can be provided by the modified instrument.

© 1963 Optical Society of America

A New Standard of Spectral Irradiance

Ralph Stair, William E. Schneider, and John K. Jackson
Appl. Opt. 2(11) 1151-1154 (1963)

A Method for Measuring the Spectral Energy Distribution of Low Brightness Light Sources

Frank J. Studer
J. Opt. Soc. Am. 37(4) 288-291 (1947)

Relative Spectral Energy Distribution of Standard Light Sources for Colorimetry*

B. Hisdal
J. Opt. Soc. Am. 48(9) 608-613 (1958)

A Universal Spectrophotometer

Wilbur Kaye
Appl. Opt. 2(12) 1295-1302 (1963)

Transmission Measurements with the Beckman Quartz Spectrophotometer

Kasson S. Gibson and Margaret M. Balcom
J. Opt. Soc. Am. 37(8) 593-608 (1947)