Abstract

A method of obtaining spectrophotometric data plotted directly, relative approximately to magnesium oxide yet using glass samples, is described. The method consists of measuring a glass filter in series with the reflectance sample and using an opaque white glass as the reference sample. The transmitting glass is chosen so that over the wave-length range of interest its transmittance is approximately equal to the ratio of the reflectance of the opaque white glass to the reflectance of magnesium oxide.

© 1949 Optical Society of America

“Compensated Opal” Working Standard Equivalent to Magnesium Oxide

Fred W. Billmeyer
J. Opt. Soc. Am. 46(1) 72_2-73 (1956)

Calibration and Operation of the General Electric Recording Spectrophotometer of the National Bureau of Standards*†

Kasson S. Gibson and Harry J. Keegan
J. Opt. Soc. Am. 28(10) 372-385 (1938)

A New Spectrophotometer Employing a Glass Fery Prism*

W. C. Miller, G. Hare, D. C. Strain, K. P. George, M. E. Stickney, and A. O. Beckman
J. Opt. Soc. Am. 39(5) 377-386 (1949)

A Provisional Standard Observer for Low Level Photometry*

K. S. Weaver
J. Opt. Soc. Am. 39(4) 278-291 (1949)

A Comparison of Direct Colorimetry of Titanium Pigments with Their Indirect Colorimetry Based on Spectrophotometry and a Standard Observer

Deane B. Judd
J. Opt. Soc. Am. 39(11) 945-950 (1949)