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Method and apparatus for wavefront sensing

United States Patent

9,921,111
March 20, 2018
View the Complete Patent at the US Patent & Trademark Office
A method for performing optical wavefront sensing includes providing an amplitude transmission mask having a light input side, a light output side, and an optical transmission axis passing from the light input side to the light output side. The amplitude transmission mask is characterized by a checkerboard pattern having a square unit cell of size .LAMBDA.. The method also includes directing an incident light field having a wavelength .lamda. to be incident on the light input side and propagating the incident light field through the amplitude transmission mask. The method further includes producing a plurality of diffracted light fields on the light output side and detecting, at a detector disposed a distance L from the amplitude transmission mask, an interferogram associated with the plurality of diffracted light fields. The relation <<.times..LAMBDA..lamda..times..times..times..times..times..LAMBDA.- .lamda..times..times.<<.times..LAMBDA..lamda..times..times. ##EQU00001## is satisfied, where n is an integer greater than zero.
Bahk; Seung-Whan (Rochester, NY)
RAM PHOTONICS, LLC (San Diego, CA)
15/ 209,535
20170038261
July 13, 2016
STATEMENT AS TO RIGHTS TO INVENTIONS MADE UNDER FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT This invention was made with Government support under Contract No. DE-FC52-08NA28302 awarded by the United States Department of Energy. The Government has certain rights in the invention.