发明授权
US4959822A Record-carrier body provided with a relief structure of optically
detectable servo-track portions and sector addresses and apparatus for
forming said structure
失效
具有可光学检测的伺服磁道部分的浮雕结构和用于形成所述结构的扇区地址和装置的记录载体主体
- 专利标题： Record-carrier body provided with a relief structure of optically detectable servo-track portions and sector addresses and apparatus for forming said structure
- 专利标题（中）： 具有可光学检测的伺服磁道部分的浮雕结构和用于形成所述结构的扇区地址和装置的记录载体主体
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申请号： US410691申请日： 1989-09-21
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公开(公告)号： US4959822A公开(公告)日： 1990-09-25
- 发明人: Johannes H. T. Pasman , Nicolaas C. J. A. Van Hijningen
- 申请人： Johannes H. T. Pasman , Nicolaas C. J. A. Van Hijningen
- 申请人地址： NY New York
- 专利权人： U.S. Philips Corporation
- 当前专利权人： U.S. Philips Corporation
- 当前专利权人地址： NY New York
- 优先权： NLX8500153 19850122
- 主分类号： G11B7/00
- IPC分类号： G11B7/00 ; G11B7/0045 ; G11B7/007 ; G11B7/08 ; G11B7/09 ; G11B7/12 ; G11B7/24 ; G11B7/26 ; G11B23/00
摘要：
A record carrier body is disclosed which is, provided with sector addresses and servo-track portions. The maximum width of the servo-track portions is at least 60% of the track period, in a direction transverse to the track direction, and is at least of the order of twice the maximum width of the sector-address areas. This makes it possible to obtain an improved tracking signal in addition to a satisfactory address signal. An improved information signal can be obtained by recording the information in the lands between the servo tracks. An apparatus is disclosed for recording sector addresses and servo track portions on the record carrier body.
公开/授权文献
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