Abstract

It was found that the refractive index of heat-strengthened plate glass diminishes continuously from surface to center. As a consequence (1) prisms of such glass form spectral lines that are greatly curved, (2) plates of glass with plane parallel ends refract like cylindrical, concave lenses. This change of refraction is probably due to the condition of strain in the glass rather than to a relative change in the concentration of the component oxides.

© 1936 Optical Society of America

On the Refractive Index Changes in Optical Glass Occasioned by Chilling and Tempering

F. Twyman and F. Simeon
J. Opt. Soc. Am. 26(3) 121-121 (1936)

A Method for Making and Testing Quarter-Wave Plates

Richard M. Emberson
J. Opt. Soc. Am. 26(1) 63-64 (1936)

The Polarizing Characteristics of Polaroid Plates for Wave-Lengths 4000A to 20,000A

L. R. Ingersoll, J. G. Winans, and E. H. Krause
J. Opt. Soc. Am. 26(6) 233-234 (1936)

A Simple Azimuth and Phase Half-Shade of Variable Sensitivity

C. V. Kent
J. Opt. Soc. Am. 26(12) 450-452 (1936)

The Fuertes Observatory Ultraviolet Stellar Spectrograph

R. William Shaw
J. Opt. Soc. Am. 26(7) 273-278 (1936)