Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hiroshi Nishikawa0
Date of Patent
October 16, 2007
Patent Application Number
10854159
Date Filed
May 27, 2004
Patent Primary Examiner
Patent abstract
A light beam splitting element that splits a beam incident on a beam receiving surface into a plurality of beams. The beam receiving surface has at least one predetermined area that directs a portion of the incident beam to proceed in a predetermined direction, the portion of the beam incident on the one predetermined area being insusceptible to spherical aberration. Further, the beam receiving surface has at least another predetermined area that directs another portion of the incident beam to proceed in another predetermined direction, the another portion of the beam incident on the another predetermined area being susceptible to spherical aberration.
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