Invention Grant
- Patent Title: Optical pickup, optical disk drive device, optical information recording device, and optical information reproduction device
- Patent Title (中): 光学拾取器，光盘驱动装置，光学信息记录装置和光学信息再现装置
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Application No.: US13521549Application Date: 2011-01-12
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Publication No.: US08437239B2Publication Date: 2013-05-07
- Inventor: Keiichi Matsuzaki , Kousei Sano
- Applicant: Keiichi Matsuzaki , Kousei Sano
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2010-006592 20100115
- International Application: PCT/JP2011/000089 WO 20110112
- International Announcement: WO2011/086897 WO 20110721
- Main IPC: G11B7/00
- IPC: G11B7/00
Abstract:
An optical pickup, an optical disk drive device, an optical information recording device, and an optical information reproduction device in which a reproduction signal, a focus error signal, and a gap error signal can be detected with high accuracy when information is recorded/reproduced on/from an optical information medium having a plurality of information recording layers.
Public/Granted literature
Information query
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