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:
Feb. 19, 2013
Filed:
May. 27, 2011
John Weston Frankovich, Fairport, NY (US);
Christopher Alan Lee, Pittsford, NY (US);
Michael Joseph Litzenberger, Fairport, NY (US);
John Weston Frankovich, Fairport, NY (US);
Christopher Alan Lee, Pittsford, NY (US);
Michael Joseph Litzenberger, Fairport, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
A compound common-path interferometer including first and second measurement arms for measuring a test object is arranged so that a reference optic of the first measurement arm is disconnected from a remainder of the first measurement arm and a coupling between the reference optics of the first and second measurement arms forms a monolithic measurement cavity for maintaining reference surfaces of the reference optics at a fixed spacing and orientation. Separate supports are provided for the monolithic measurement cavity and the remainder of the first measurement arm.