Abstract

A polystyrene replica technique, similar to that employed in electron microscopy, has been used to prepare extremely thin films of identical surface structure. These thin transparent films can be transferred to any desirable surface. Replicas made from gloss standards are shown to be reproducible in surface structure and spatial reflectance characteristics.

© 1949 Optical Society of America

A Provisional Standard Observer for Low Level Photometry*

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

An Auxiliary Working Standard Equivalent to Magnesium Oxide on a General Electric Spectrophotometer

Joseph W. Gabel and E. I. Stearns
J. Opt. Soc. Am. 39(6) 481-483 (1949)

Silicon Monoxide Protected Front-Surface Mirrors*

Georg Hass and Noel W. Scott
J. Opt. Soc. Am. 39(2) 179-184 (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)

The Ridgway Color Standards with a Munsell Notation Key

D. H. Hamly
J. Opt. Soc. Am. 39(7) 592-599 (1949)