Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
April 17, 2007
Patent Application Number
10921864
Date Filed
August 20, 2004
Patent Primary Examiner
Patent abstract
An aberration correction element is disposed between first to third laser light sources and an objective lens, first and second laser lights emitted from the first and second laser light sources are incident upon the aberration correction element in the form of parallel lights, and a third laser light emitted from the third laser light source is incident upon the aberration correction element in the form of a divergent light.
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