Abstract

A microphotometer of the type described by Vincent and Sawyer has been altered optically and electrically to eliminate certain objectionable features. Scattered light, dependence of the plate projection lens upon the aperture of the plate illumination system, photo-cell fatigue, relatively short life of the projection lamp, and the need for a constant voltage power supply have been eliminated. Plate calibration curves obtained with the altered instrument on wide bands and narrow lines are essentially identical.

© 1949 Optical Society of America

A Comparison of Electrical and Psychophysical Determinations of the Spectral Sensitivity of the Human Eye

Lorrin A. Riggs, Richard N. Berry, and Matthew Wayner
J. Opt. Soc. Am. 39(6) 427-436 (1949)

The Optical and Electrical Properties of Zinc Silicate Phosphors

Elemér Nagy
J. Opt. Soc. Am. 39(1) 42-49 (1949)

A High Speed High Precision Microphotometer

H. B. Vincent and R. A. Sawyer
J. Opt. Soc. Am. 27(5) 193-197 (1937)

A Survey of Present Methods Used to Determine the Optical Properties of Phosphors*,**

Wayne B. Nottingham
J. Opt. Soc. Am. 39(8) 641-647 (1949)

The Electro-Optic Effect in Uniaxial Crystals of the Type XH₂PO₄. II. Experimental

Bruce H. Billings
J. Opt. Soc. Am. 39(10) 802-808 (1949)