Abstract

A careful analysis of the basic mechanisms of the Verneuil process led to a methodical study of the many parameters associated with it. Among these, the feed rate, retraction rate, and flame characteristics were found to be most important. A photoelectric cell as the sensor for a servo system with two outputs was used to sense the plane of crystallization and control its position. A completely automated Verneuil apparatus, incorporating this and other control systems, suitable for the study of growth under well-defined, rigidly controlled, and dependably reproducible conditions was designed and constructed.

© 1966 Optical Society of America

Meeting Reports

Appl. Opt. 5(10) 1692-1695 (1966)

Optical Tracking; a Brief Survey of the Field

D. C. Marquis
Appl. Opt. 5(4) 481-487 (1966)

Optical Quality and Radiation Patterns of Ruby Lasers

C. Martin Stickley
Appl. Opt. 2(8) 855-860 (1963)

Characteristics of a λ/2 Kerr Cell Ruby Oscillator for Use as an Optical Radar (Lidar)

Hans W. Mocker
Appl. Opt. 5(11) 1829-1831 (1966)

Optical Transmission Research

S. E. Miller and L. C. Tillotson
Appl. Opt. 5(10) 1538-1549 (1966)