Method of producing an optical member

Details Method of producing an optical member Method of producing an optical member

2006-03-07

2006-03-07

Walls, Dionne A. (Department: 1731)

Glass manufacturing

Processes

With destruction or delamination of transitory attached or...

C065S103000

Reexamination Certificate

active

07007510

ABSTRACT:
An object of the present invention is to provide an improved blank such that an optical member of a high homogeneity can be obtained therefrom, and to provide a vessel and a heat treatment method for heat-treating a highly uniform synthetic quartz blank. In a first aspect of the invention a special designed blank is provided showing a concave shaped outer surface. In a second aspect of the invention a special designed vessel for heat-treating blanks is provided, whereby the degree of heat emission at the center is set higher than that of the surroundings.

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