Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Shigeharu Kimura0
Harukazu Miyamoto0
Date of Patent
June 21, 2011
0Patent Application Number
126328670
Date Filed
December 8, 2009
0Patent Primary Examiner
Patent abstract
In an optical pickup capable of removing inter-layer crosstalk, a dark line that may appear in a central portion of a beam is removed. Thereby, an error in a data signal is reduced. Reflected light from a multi-layer disc is split into two parallel bundles with a splitting optical system in a way that the light is split at a central line. Thereby, when reflected light from a target layer is focused, the reflected light is not influenced from an attenuation element provided on an optical axis.
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