Abstract

The Beckman spectrophotometer Model DU has proved to be a useful instrument for measuring spectral directional reflectance. Like other spectrophotometers it is subject to slit-width and stray-energy errors. The magnitude of these errors and techniques for minimizing them are discussed. The viewing geometry and an adaptor for four-inch square specimens are described.

© 1952 Optical Society of America

Transmission Measurements with the Beckman Quartz Spectrophotometer

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

Integrating Sphere for the Measurement of Reflectance with the Beckman Model DR Recording Spectrophotometer

John A. Jacquez, Wayne McKeehan, John Huss, James M. Dimitroff, and Hans F. Kuppenheim
J. Opt. Soc. Am. 45(11) 971-975 (1955)

An Automatic Relative-Transmission Attachment for the Beckman Model DU Spectrophotometer

Wilbur Kaye and R. G. Devaney
J. Opt. Soc. Am. 42(8) 567-571 (1952)

Modification of the Beckman Model DU Spectrophotometer for the Measurement of Interference Filters*

Hubert S. Moran
J. Opt. Soc. Am. 45(1) 26-27 (1955)

Modification of a Beckman Model DU Spectrophotometer for Automatic Operation at 210–2700 mμ

Wilbur Kaye, Cham Canon, and R. G. Devaney
J. Opt. Soc. Am. 41(10) 658-664 (1951)