Method for producing optical glass

Details Method for producing optical glass Method for producing optical glass

2003-02-18

2008-10-21

Lopez, Carlos (Department: 1791)

Glass manufacturing

Processes of manufacturing fibers, filaments, or preforms

Process of manufacturing optical fibers, waveguides, or...

C065S531000

Reexamination Certificate

active

07437893

ABSTRACT:
This invention provides a method for manufacturing an optical glass in order to prevent the deterioration of the burner used in the synthesis of glass particles that form the optical glass, and to obtain a stable quality optical glass. In this invention, the number of residual bubbles with a diameter of 0.3 mm and more is 0.005/cm3or less per unit volume of the optical glass. Such optical glass is obtained by controlling the temperature of an end face of the burner for glass synthesis during the deposition of the glass particles by regulating the relationship of the flow velocity or the flow volume between an inflammable gas and a combustion-supporting gas.

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International Preliminary Report on Patentability, mailed Aug. 31, 2006, for International Application No. PCT/US2005/004534.

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