Invention Grant
US08279723B2 Recording medium, optical device, and recording and reproducing apparatus
有权
记录介质,光学拾取装置和记录和再现装置
- Patent Title: Recording medium, optical device, and recording and reproducing apparatus
- Patent Title (中): 记录介质,光学拾取装置和记录和再现装置
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Application No.: US12541668Application Date: 2009-08-14
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Publication No.: US08279723B2Publication Date: 2012-10-02
- Inventor: Morio Nakatani , Kenji Nagatomi , Yoshiyuki Matsumura , Seiichiro Takahashi
- Applicant: Morio Nakatani , Kenji Nagatomi , Yoshiyuki Matsumura , Seiichiro Takahashi
- Applicant Address: JP Okaka
- Assignee: Sanyo Electric Co., Ltd.
- Current Assignee: Sanyo Electric Co., Ltd.
- Current Assignee Address: JP Okaka
- Agency: Ditthavong Mori & Steiner, P.C.
- Priority: JP2007-036980 20070216
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
A recording medium includes at least one recording layer on which information is recorded by multi-photon absorption, and a servo layer disposed in a laminated direction with respect to the recording layer and having a track for guiding a beam spot of laser light having a first wavelength and a beam spot of laser light having a second wavelength along a scanning trajectory. The servo layer and the at least one recording layer constitute a set of layers, and a plurality of sets of layers is formed in the laminated direction. The servo layer is made of a material having a high reflectance with respect to laser light having a third wavelength for generating a servo signal, and low reflectances with respect to the laser light having the first wavelength and the laser light having the second wavelength.
Public/Granted literature
- US20090316537A1 RECORDING MEDIUM, OPTICAL DEVICE, AND RECORDING AND REPRODUCING APPARATUS Public/Granted day:2009-12-24
Information query
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