Invention Grant
- Patent Title: Optical disc apparatus
- Patent Title (中): 光盘装置
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Application No.: US12832257Application Date: 2010-07-08
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Publication No.: US08169877B2Publication Date: 2012-05-01
- Inventor: Yukinobu Tanaka
- Applicant: Yukinobu Tanaka
- Applicant Address: JP Tokyo
- Assignee: Hitachi Consumer Electronics Co., Ltd.
- Current Assignee: Hitachi Consumer Electronics Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Antonelli, Terry, Stout & Kraus, LLP.
- Priority: JP2010-000872 20100106
- Main IPC: G11B7/00
- IPC: G11B7/00
Abstract:
An optical disc apparatus for use of an optical disc including a plurality of recording layers sets an amount of correction of spherical aberration for each of the recording layers of the disc during a focus sweep. A photodetector portion produces a signal in response to returned light for each of the recording layers.
Public/Granted literature
- US20110164486A1 OPTICAL DISC APPARATUS Public/Granted day:2011-07-07
Information query
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