Optical elements made from ThF.sub.4 --BeF.sub.2 glasses

Details Optical elements made from ThF.sub.4 --BeF.sub.2 glasses Optical elements made from ThF.sub.4 --BeF.sub.2 glasses

1986-02-10

1987-05-26

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 40, 501904, 501905, 501906, C03C 1304, C03C 332, C03C 408, C03C 410

Patent

active

046686410

ABSTRACT:
ThF.sub.4 --BeF.sub.2 glasses of specified composition exhibit sufficiently low high-temperature viscosity and melt stability to be useful for the fabrication of optical devices for ultraviolet or infrared light transmission. The low melt viscosity renders the glasses suitable as host materials for rare earth and transition metal dopants so that they can be used for optical devices such as lasers and optical filters.

REFERENCES:
patent: 2466507 (1949-04-01), Sun
patent: 2511224 (1950-06-01), Sun et al.
patent: 3650779 (1972-03-01), Riebling et al.
patent: 3958970 (1976-05-01), Auzel
patent: 4141741 (1979-02-01), Lucas et al.
patent: 4142986 (1979-03-01), Rapp
Thoma, R. E., et al; "Phase Equilibria in the System BeF.sub.2 --ThF.sub.4 and LiF--BeF.sub.2 --ThF.sub.4 ", J. Phys. Chem., vol. 64, pp. 865-870, Jul. 1960.

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