发明授权
- 专利标题: Optical recording disk, and recording/reading apparatus using same
- 专利标题(中): 光记录盘和使用其的记录/读取装置
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申请号: US118232申请日: 1993-09-09
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公开(公告)号: US5422874A公开(公告)日: 1995-06-06
- 发明人: Masahiro Birukawa , Norio Miyatake , Yuuichi Fukamachi , Yoshihiko Kudoh , Yasumori Hino
- 申请人: Masahiro Birukawa , Norio Miyatake , Yuuichi Fukamachi , Yoshihiko Kudoh , Yasumori Hino
- 申请人地址: JPX Osaka
- 专利权人: Matsushita Electric Industrial Co., Ltd.
- 当前专利权人: Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址: JPX Osaka
- 优先权: JPX4-241595 19920910
- 主分类号: G11B11/10
- IPC分类号: G11B11/10 ; G11B7/007 ; G11B7/24 ; G11B7/26 ; G11B11/105 ; G11B20/12 ; G11B27/19 ; G11B27/30
摘要:
The present invention relates to a magneto-optical recording medium, in which are provided at least a reading layer and a writing layer on a substrate. A track guide groove is formed in the medium so as to include in-groove portions and on-land portions. Pits are formed on a portion along the track longitudinally adjacent where an in-groove portion and where no guide groove exists. Pits are also formed in an on-land portion between the in-groove portions of the track guide groove. Only a portion where a temperature has been raised by optical beam irradiation is read, while a domain of a writing layer is copied on the writing layer, whereby a writing/reading operation can be effected with narrower track pitches.
公开/授权文献
- US4297760A Debris picker and bagger 公开/授权日:1981-11-03