发明授权
US06122233A Optical disk having virtually constant width recording track and optical
disk apparatus
失效
具有实际上恒定宽度的记录轨道和光盘装置的光盘
- 专利标题: Optical disk having virtually constant width recording track and optical disk apparatus
- 专利标题(中): 具有实际上恒定宽度的记录轨道和光盘装置的光盘
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申请号: US15011申请日: 1998-01-28
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公开(公告)号: US06122233A公开(公告)日: 2000-09-19
- 发明人: Naoyasu Iketani , Go Mori , Michinobu Mieda , Yoshiteru Murakami , Junji Hirokane , Akira Takahashi
- 申请人: Naoyasu Iketani , Go Mori , Michinobu Mieda , Yoshiteru Murakami , Junji Hirokane , 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: JPX9-016101 19970130
- 主分类号: G11B7/24
- IPC分类号: G11B7/24 ; G11B7/00 ; G11B7/005 ; G11B7/007 ; G11B11/105 ; G11B7/09
摘要:
In an optical disk, grooves and lands serving as recording tracks are provided, the grooves are shaped so as to have virtually the same width, and in a first region, the two side walls of each groove wind in accordance with address information. The first region of the groove is formed with its leading portion located at the same angular position as the leading portion of at least one of the first regions of the adjacent grooves. Moreover, the winding portions corresponding to respective bits of the address information are formed in a manner so as to synchronize to the adjacent grooves. With this arrangement, it becomes possible to easily detect address information from the grooves and lands, and consequently to obtain an information reproducing signal with high quality.
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