发明授权
- 专利标题: Optical recording apparatus with simultaneous erasing and recording
- 专利标题(中): 具有同时擦除和记录的光记录装置
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申请号: US425503申请日: 1989-10-20
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公开(公告)号: US4993011A公开(公告)日: 1991-02-12
- 发明人: Kenji Torazawa , Satoshi Sumi , Seiji Murata , Shigekazu Minechika
- 申请人: Kenji Torazawa , Satoshi Sumi , Seiji Murata , Shigekazu Minechika
- 申请人地址: JPX Moriguchi
- 专利权人: Sanyo Electric Co., Ltd.
- 当前专利权人: Sanyo Electric Co., Ltd.
- 当前专利权人地址: JPX Moriguchi
- 优先权: JPX61-62450 19860319; JPX61-62526 19860320
- 主分类号: G11B7/00
- IPC分类号: G11B7/00 ; G11B7/0045 ; G11B7/08 ; G11B7/09 ; G11B7/125 ; G11B7/13 ; G11B11/105
摘要:
An erasing beam B1 and a recording beam B2 emitted from a laser diode array 20 are focused on different tracks of a optical magnetic disk D, the erasing beam B1 being focused on a track located ahead of a track on which the recording beam B2 is focused. The reflected beams of the erasing beam B1 and the recording beam B2 are separated respectively into two polarized components by means of a polarized beam splitter 17 and the polarized components are received by photo sensor means 23 and 24. Based on outputs of the photo sensor means 23 and 24, an address signal, a focus error signal and a tracking error signal are obtained. At the time of reproduction, the laser diode array 20 emits a reproducing beam so that the photo sensor means provide a reproducing signal.
公开/授权文献
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