Share Email Print

Proceedings Paper

Development Of Fluorophosphate Optical Glasses
Author(s): J. T. Wenzel; D. H. Blackburn; W. K. Haller; S. Stokowski; M. J. Weber
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The requirements of high-energy laser systems have stimulated the development of low-refractive index, low-dispersion optical glasses, thus extending the range of available glasses in the Abbe diagram. Fluorophosphate glasses are the prime candidates to meet these requirements, but their preparation is complicated by fluorine volatilization on melting and devitrification and cracking on casting. The latter difficulties are caused by low viscosity at the crystallization temperature and by high thermal expansion. Exploration of glassforming regions and simultaneous optimization of the optical properties has led to the identification of compositions with commercial potential. A representative 100-gram melt contained 60 mol % RF2 (R = Mg, Ca, Sr, Ba), 36.7 mol % A1F3' 3.3 mol % Al(P03)3' with nD = 1.439 and vD = 95. After annealing it was optically homogeneous and strain-free.

Paper Details

Date Published: 27 February 1980
PDF: 9 pages
Proc. SPIE 0204, Physical Properties of Optical Materials, (27 February 1980); doi: 10.1117/12.958147
Show Author Affiliations
J. T. Wenzel, National Bureau of Standards (United States)
D. H. Blackburn, National Bureau of Standards (United States)
W. K. Haller, National Bureau of Standards (United States)
S. Stokowski, University of California (United States)
M. J. Weber, University of California (United States)

Published in SPIE Proceedings Vol. 0204:
Physical Properties of Optical Materials
Roy F. Potter, Editor(s)

© SPIE. Terms of Use
Back to Top