Optical glass and its production

Details Optical glass and its production Optical glass and its production

1974-09-26

1976-05-04

McCarthy, Helen M.

Glass manufacturing

Processes

With shaping of particulate material and subsequent fusing...

65134, 106 42, 106 50, 106 52, 106 54, 350 96WG, 350 96M, 427423, 106 47QR, C03B 100, C03B 2320

Patent

active

039544311

ABSTRACT:
High silica content optical glasses, containing more volatile oxides such as GeO.sub.2 and B.sub.2 O.sub.3, are produced by plasma fusion of powders without inordinately high loss of the more volatile constituents. The powders are produced by a process including the heat treatment of intimately mixed materials, which include the glass forming constituents. Small quantities of GeO.sub.2 are included in borosilicate glass to suppress bubble formation. Pairs of glass compositions have been found, with sufficient index of refraction difference to produce guidance in optical transmission lines, while possessing sufficient thermal expansion match to reduce stresses in the line.

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Nassaugki et al. "Low Loss Fused Silica made by the Plasus Torch" Applied Optics 13(4) Apr. 1974 pp. 744-745.

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