Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
September 23, 2008
Patent Application Number
10886282
Date Filed
July 7, 2004
Patent Primary Examiner
Patent abstract
It is an object of the invention to improve a recording capacity density by removing part of diffracted light and by making a recording region in relation to a recording medium in the efficient shape. An optical information recording apparatus in which holography is formed in an optical information recording medium by making information light reflected by a spatial modulator interfere with reference light, is provided with a diffracted light removal means which removes part of diffracted light of the reflected light, and whose aperture is in the shape of a square.
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