Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Dan O'Connell0
Date of Patent
June 1, 2010
Patent Application Number
11907193
Date Filed
October 10, 2007
Patent Primary Examiner
Patent abstract
The invention encompasses beam expanders and methods of using such beam expanders. A beam expander according to the present invention may advantageously be used with an interferometer. Beam expanders according to the present disclosure contain at least an input and an output lens, with the output lens having a plano-convex arrangement such that the surface of the output lens is optically flat and can be used as the reference surface in a Fizeau interferometer. The beam expander may also encompass a housing, a partially reflective coating and an anti-reflective coating.
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