Abstract

A filter transmitting a narrow band of light at 560 mμ is of particular importance in the colorimetry of sugar solutions, in optical pyrometry, in abridged spectrophotometry, and in photometry. A new 4-component glass filter has been designed which isolates and transmits light at 560 mμ more effectively than previous filters. Two components of this filter are of Corning glass and two of Jena glass. The spectral transmissions of the filter and its components are illustrated. The spectral centroid of the light transmitted by the filter is at 560 mμ for both incandescent and daylight illuminants. Various other luminous characteristics of the filter are also defined and values given.

© 1935 Optical Society of America

A Coordinated System of Optical Filters for Color-Temperature Determinations

Frank Benford
J. Opt. Soc. Am. 25(5) 136-141 (1935)

Automatic Measurement, Reduction and Recording of Wavelengths from Spectrograms

George R. Harrison
J. Opt. Soc. Am. 25(6) 169-178 (1935)

The Penetration of the Red, Green and Violet Components of Daylight into Atlantic Waters

R. H. Oster and G. L. Clarke
J. Opt. Soc. Am. 25(3) 84-91 (1935)

Disk Colorimetry; Including a Comparison of Methods for Computing Tristimulus Values for Certain Disks

Dorothy Nickerson
J. Opt. Soc. Am. 25(8) 253-257 (1935)

Seasonal Changes in Components of Submarine Daylight

E. Allan Williams and C. L. Utterback
J. Opt. Soc. Am. 25(12) 384-387 (1935)