发明授权
US5063546A Optic disc with servo pattern and apparatus for accessing the optical
disc
失效
具有伺服图案的光盘和用于访问光盘的设备
- 专利标题： Optic disc with servo pattern and apparatus for accessing the optical disc
- 专利标题（中）： 具有伺服图案的光盘和用于访问光盘的设备
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申请号： US166671申请日： 1988-03-11
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公开(公告)号： US5063546A公开(公告)日： 1991-11-05
- 发明人: Osamu Ito , Masaharu Ogawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Teruo Furukawa , Yoshiki Nakajima
- 申请人： Osamu Ito , Masaharu Ogawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Teruo Furukawa , Yoshiki Nakajima
- 申请人地址： JPX Tokyo
- 专利权人： Mitsubishi Denki Kabushiki Kaisha
- 当前专利权人： Mitsubishi Denki Kabushiki Kaisha
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX62-59537 19870313; JPX62-138585 19870602; JPX62-149586 19870616
- 主分类号： G11B7/007
- IPC分类号： G11B7/007 ; G11B7/013 ; G11B7/085 ; G11B19/04 ; G11B19/20 ; G11B27/30
摘要：
An optical disc having a plurality of information tracks, each information track having a servo field including a pair of wobbled pits and the clock pit. The distance between one of the wobbled pits and the clock pit in each servo field is selected so that the optical disc includes at least three different types of servo field. These different types of servo field appear in a predetermined sequence for every one or more contiguous information tracks. A transducing apparatus for tranducing such an optical disc has a direction detecting circuit for detecting the moving velocity of a movable portion of an optical head, and a speed detecting circuit for detecting the relative velocity of the movable portion.
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