Invention Grant
- Patent Title: Optical information recording/reproducing device, optical unit, and optical information recording method
- Patent Title (中): 光信息记录/再现装置，光学单元和光信息记录方法
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Application No.: US12922782Application Date: 2009-04-20
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Publication No.: US08238219B2Publication Date: 2012-08-07
- Inventor: Shin Tominaga , Ryuichi Katayama
- Applicant: Shin Tominaga , Ryuichi Katayama
- Applicant Address: JP Tokyo
- Assignee: NEC Corporation
- Current Assignee: NEC Corporation
- Current Assignee Address: JP Tokyo
- Agent Michael Dryja
- Priority: JP2008-109874 20080421
- International Application: PCT/JP2009/057857 WO 20090420
- International Announcement: WO2009/131097 WO 20091029
- Main IPC: G11B7/00
- IPC: G11B7/00
Abstract:
An optical unit is provided with a light source; a light dividing means for dividing light emerging from the light source into a first light and a second light; a light converging means for converging the first and second lights at the same position in the recording layer in the manner that they face each other; a polarization state switching means for switching the polarization states of the first and second lights at the convergence point in the recording layer; and a light irradiation state switching means for switching between the state in which the optical cording medium is irradiated with both the first light and the second light and the state in which the optical recording medium is irradiated with only one of the first and second lights.
Public/Granted literature
- US20110026390A1 OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE, OPTICAL UNIT, AND OPTICAL INFORMATION RECORDING METHOD Public/Granted day:2011-02-03
Information query
IPC分类:
