Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Katsuya Yagi0
Yuichiro Ori0
Yuichi Atarashi0
Takuji Hatano0
Date of Patent
September 8, 2009
0Patent Application Number
109729700
Date Filed
October 25, 2004
0Patent Primary Examiner
Patent abstract
An optical pickup apparatus has a semiconductor laser source which emits a laser beam in a wavelength band of 405 nm having an elliptic light intensity distribution; a beam shaping element which shapes the light intensity distribution of the laser beam; a polarizing beam splitter having a polarized light separation film in contact with the air and reflecting the laser beam shaped by the beam shaping element on the polarized light separation film; and an objective lens which focuses the laser beam reflected on the polarized light separation film onto an optical information recording medium.
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