Invention Grant
- Patent Title: Optical recording medium and reproducing device
- Patent Title (中): 光记录介质和再现装置
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Application No.: US12375648Application Date: 2007-07-27
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Publication No.: US08156515B2Publication Date: 2012-04-10
- Inventor: Takayuki Nagata , Joji Anzai , Hideki Aikoh
- Applicant: Takayuki Nagata , Joji Anzai , Hideki Aikoh
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2006-209656 20060801
- International Application: PCT/JP2007/064767 WO 20070727
- International Announcement: WO2008/015974 WO 20080207
- Main IPC: G11B7/24
- IPC: G11B7/24

Abstract:
An optical recording medium is provided having a plurality of laminated recording layers, wherein the recording layers are formed such that a spacing between each pair of recording layers of all recording layer combinations selected from the plurality of recording layers is different from that of each other pair. Accordingly, a return of lights reflected by other layers to an optical head along the same optical path as reflected light from a readout layer during the reproduction can be avoided. Therefore, use of the optical recording medium, from which a good reproduction signal can be obtained, can suppress a deterioration of a servo signal and a reproduction signal of a reproducing device due to a variation of interference fringes on a light receiving element.
Public/Granted literature
- US20090303864A1 OPTICAL RECORDING MEDIUM AND REPRODUCING DEVICE Public/Granted day:2009-12-10
Information query
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