Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Sherman K. Poultney0
Date of Patent
October 13, 2009
Patent Application Number
11708618
Date Filed
February 21, 2007
Patent Primary Examiner
Patent abstract
A method for measuring a wavefront of an optical system. A first step of the method includes directing electromagnetic radiation uniformly at an object plane having a first grating positioned therein. Lines of the first grating comprise a plurality of dots. A second step of the method includes projecting an image of the first grating onto a focal plane having a second grating positioned therein. A third step of the method includes measuring the wavefront of the optical system based on a fringe pattern produced by the second grating.
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