Corning Incorporated

Christine E Heckle

Michael Henry Wasilewski

Charlene Marie Smith

Dale Robert Powers

Heather Debra Boek

John T Brown

Thomas Adam Collins

Chunhong Chelsie He

John Edward Maxon

Johannes Moll

Mahendra Kumar Misra

Michael S Dobbins

Robert E McLay

Raymond E Lindner

Disclosed is a synthetic silica glass optical material having high resistance to optical damage by ultraviolet radiation in the ultraviolet wavelength range, particularly in the wavelength region of less than about 250 nm and particularly, exhibiting a low laser induced density change. The synthetic silica glass optical material of the present invention contains at least about 0.1 ppm of aluminum and Hconcentration levels greater than about 0.5&#xd7;10molecules/cm. Additionally, the synthetic silica optical material of the present invention exhibits an Hto Al ratio of greater than about 1.2, as measured in &#xd7;10/cmmolecules Hper ppm Al.

Synthetic silica glass optical material having high resistance to optically induced index change

Fused silica articles exhibiting improved internal transmission and decreased absorption change when irradiated with a laser when compared with fused silica articles containing lower levels of aluminum. The articles also exhibit induced transmission when irradiated with a laser. The articles also exhibit improved off-axis refractive index homogeneity.

Fused silica having improved index homogeneity

Burners and methods for producing fused silica members. The burner includes seven gas-emitting regions, including four regions for emitting a mixture of oxygen and combustible gas.

High heat capacity burners for producing fused silica boules

A method for preparing high-purity, bulk fused silica includes supplying silane gas, a gaseous fuel, and oxygen gas to a combustion burner. Silica particles are formed by passing the silane gas into a flame formed by the combustion reaction of the gaseous fuel with the oxygen gas while maintaining the ratio of the flow rate of the gaseous fuel to the flow rate of the silane gas no less than twelve and the ratio of the flow rate of the gaseous fuel to the flow rate of the oxygen gas no less than three. The silica particles formed are immediately deposited onto a hot bait to form a boule.

Method for producing bulk fused silica

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Horseheads, NY, United States of America

Christine E Heckle