Corning Incorporated

Daniel Joseph Bleaking

Dana Craig Bookbinder

Pushkar Tandon

Kenneth Edward Hrdina

Richard Michael Fiacco

John Edward Maxon

Kimberly Ann Wilbert

Disclosed are high purity synthetic silica glass material having a high OH concentration homogeneity in a plane perpendicular to the optical axis, and process of making the same. The glass has high refractive index homogeneity. The glass can have high internal transmission of at least 99.65%/cm at 193 nm. The process does not require a post-sintering homogenization step. The controlling factors for high compositional homogeneity, thus high refractive index homogeneity, include high initial local soot density uniformity in the soot preform and slow sintering, notably isothermal treatment during consolidation.

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Wilmington, NC, United States of America

Daniel Joseph Bleaking