Batching of molten glass in the production of graded index of re

Details Batching of molten glass in the production of graded index of re Batching of molten glass in the production of graded index of re

1998-06-30

2000-02-29

Silverman, Stanley S.

Glass manufacturing

Processes

Blending of separate molten glass streams

65122, 651341, 651349, 65145, 65146, 65347, C03B 526, C03B 528, C03B 700, C03B 714, C03B 1310

Patent

active

060294752

ABSTRACT:
Gradient refractive index elements are fabricated from the melt, using two or more molten glass compositions, to prevent bubble formation in the elements. The individual glass compositions are melted in separate containers, and then added as appropriate to a single crucible. The more dense glasses settle to the bottom of the crucible, while the less dense glasses float on top of the melt layer. As a consequence of using molten glass, no bubbles appear. Batching of the process can be done by the level of the free melt surface, which means that one can control the batched volume of the melted glass by controlling the level of the free melt surface in the crucible.

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