发明授权
- 专利标题： Optical recording apparatus having improved erasing capability
- 专利标题（中）： 具有改善擦除能力的光记录装置
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申请号： US304908申请日： 1989-02-02
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公开(公告)号： US4953150A公开(公告)日： 1990-08-28
- 发明人: Hiraku Sonobe
- 申请人： Hiraku Sonobe
- 申请人地址： JPX Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX56-179423 19811109
- 主分类号： G11B7/0055
- IPC分类号： G11B7/0055 ; G11B11/10 ; G11B11/105 ; G11B19/02
摘要：
An optical recording apparatus is disclosed in which a recording medium is scanned by a beam of light to record information on the recording medium, to reproduce the recorded information and also to erase the recorded information. The beam spot formed on the recording medium for erasing has a larger spot width measured in the direction perpendicular to the scan direction than that of the beam spot for recording.
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