发明申请
- 专利标题: RECORDING MEDIUM, OPTICAL DEVICE, AND RECORDING AND REPRODUCING APPARATUS
- 专利标题(中): 记录介质,光学设备,记录和再现设备
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申请号: US12541668申请日: 2009-08-14
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公开(公告)号: US20090316537A1公开(公告)日: 2009-12-24
- 发明人: Morio Nakatani , Kenji Nagatomi , Yoshiyuki Matsumura , Seiichiro Takahashi
- 申请人: Morio Nakatani , Kenji Nagatomi , Yoshiyuki Matsumura , Seiichiro Takahashi
- 申请人地址: JP Moriguchi-shi
- 专利权人: Sanyo Electric Co., Ltd.
- 当前专利权人: Sanyo Electric Co., Ltd.
- 当前专利权人地址: JP Moriguchi-shi
- 优先权: JP2007-036980 20070216
- 主分类号: G11B7/00
- IPC分类号: G11B7/00 ; G11B7/26
摘要:
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.
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