Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
July 31, 2007
Patent Application Number
11105766
Date Filed
April 13, 2005
Patent Citations Received
Patent Primary Examiner
Patent abstract
An optical sub-system has an optical element having a curved surface featured with a plurality of recurring surface tooling marks. The depth of any surface tooling mark is less than 0.2 wavelengths, whereby light is diffracted on the curved surface. A spatial filter blocks the diffracted light and passes the undiffracted light.
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