Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tohru Hotta0
Ryoichi Kawasaki0
Date of Patent
June 7, 2011
0Patent Application Number
123900860
Date Filed
February 20, 2009
0Patent Primary Examiner
Patent abstract
An optical pickup apparatus comprising: a laser diode; an objective lens configured to focus laser light emitted from the laser diode on a signal recording layer of an optical disc; a first aberration correction element arranged in an optical path between the laser diode and the objective lens; and a second aberration correction element arranged in the optical path between the laser diode and the objective lens and having an aberration correction speed lower than the aberration correction speed of the first aberration correction element, the first aberration correction element and the second aberration correction element being selectively operated according to the required aberration correction speed.
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