发明授权
- 专利标题: Optical disk with tracking guide of wind and unwind portions
- 专利标题(中): 具有跟踪引导风和展开部分的光盘
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申请号: US886299申请日: 1997-07-01
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公开(公告)号: US5991259A公开(公告)日: 1999-11-23
- 发明人: Junichiro Nakayama , Naoyasu Iketani , Michinobu Mieda , Yoshiteru Murakami , Akira Takahashi
- 申请人: Junichiro Nakayama , Naoyasu Iketani , Michinobu Mieda , Yoshiteru Murakami , Akira Takahashi
- 申请人地址: JPX Osaka
- 专利权人: Sharp Kabushiki Kaisha
- 当前专利权人: Sharp Kabushiki Kaisha
- 当前专利权人地址: JPX Osaka
- 优先权: JPX8-176199 19960705; JPX8-287740 19961030
- 主分类号: G11B7/24
- IPC分类号: G11B7/24 ; G11B7/00 ; G11B7/004 ; G11B7/007 ; G11B7/09 ; G11B7/26 ; G11B27/19 ; G11B27/30
摘要:
An optical disk substrate in which a winding groove, which is winding in accordance with address information, and a normal groove, which is not winding, are placed alternately in the radial direction as tracking guides used for tracking control. With respect to this optical disk substrate, a laser beam, which is used for forming patterns for the tracking guides, is applied while being switched alternately between the first mode that exerts oscillations in the disk radial direction in accordance with the address information and the second mode that does not exert oscillations. An optical disk has a construction in which at least a recording layer is formed on the optical disk substrate.