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:
Dec. 14, 2004
Filed:
Feb. 27, 2002
Bradley F. Bowden, Alfred, NY (US);
Kenneth E. Hrdina, Horseheads, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
The present invention relates to a method for forming an optical blank. The method includes providing a green body that has a non-porous exterior portion and a porous interior portion. The interior portion is evacuated to create a vacuum in the interior portion. The green body is then pressed using a hot isostatic pressing technique to densify the green body into a solid glass optical blank. This method produces homogeneous optical blanks having substantially no striae. The method also produces dense, inclusion free glass. As a result, scattering is substantially reduced when EUV light is reflected from a component produced from optical blank employing the method of the present invention.