发明授权
- 专利标题: Optical recording medium and tracking method therefor
- 专利标题(中): 光记录介质及其跟踪方法
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申请号: US501333申请日: 1990-03-22
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公开(公告)号: US5027337A公开(公告)日: 1991-06-25
- 发明人: Shunzo Takahashi , Shigeru Izawa , Hidefumi Suzuki , Takashi Hasemi
- 申请人: Shunzo Takahashi , Shigeru Izawa , Hidefumi Suzuki , Takashi Hasemi
- 申请人地址: JPX Tokyo
- 专利权人: CSK Corporation
- 当前专利权人: CSK Corporation
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX61-69876 19860328; JPX61-108154 19860512; JPX61-138730 19860613
- 主分类号: G11B7/0033
- IPC分类号: G11B7/0033 ; G11B7/013 ; G11B7/09
摘要:
An optical recording medium has a data storage section including data tracks and tracking lines formed in the data storage section for reading or writing data. The optical recording medium includes an elongated recording region defined between each two adjacent tracking lines, each of the data recording regions having at least one data track disposed offset from the center of the data recording region. The tracking method for the medium includes establishing a first optical detection region on the medium for detecting the tracking line position relative to the detection region and establishing a second optical detection region on the medium for reading or writing which is positioned in a fixed relationship to the first optical detection region. The first and second optical detection regions are positioned with respect to each other so that when the first optical detection region is tracking the tracking line, the second optical detection region is positioned for reading or writing along the data track at a position laterally offset from the center of the data recording region.