The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 2009
Filed:
Jun. 08, 2005
Daniel Joseph Bleaking, Wilmington, NC (US);
Dana C. Bookbinder, Corning, NY (US);
Richard M. Fiacco, Corning, NY (US);
Kenneth E. Hrdina, Horseheads, NY (US);
Pushkar Tandon, Corning, NY (US);
John E. Maxon, Canton, NY (US);
Kimberly Ann Wilbert, Wilmington, NC (US);
Daniel Joseph Bleaking, Wilmington, NC (US);
Dana C. Bookbinder, Corning, NY (US);
Richard M. Fiacco, Corning, NY (US);
Kenneth E. Hrdina, Horseheads, NY (US);
Pushkar Tandon, Corning, NY (US);
John E. Maxon, Canton, NY (US);
Kimberly Ann Wilbert, Wilmington, NC (US);
Corning Incorporated, Corning, NY (US);
Abstract
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.