发明名称 |
Optical recording apparatus. |
摘要 |
<p>An erasing beam B1 and a recording beam B2 emitted from a laser diode array (20) are focused on different tracks of an 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 reproduced signal. </p> |
申请公布号 |
EP0238055(A2) |
申请公布日期 |
1987.09.23 |
申请号 |
EP19870103959 |
申请日期 |
1987.03.18 |
申请人 |
SANYO ELECTRIC CO., LTD. |
发明人 |
TORAZAWA, KENJI;SATOSHI, SUMI;MURATA, SEIJI;SHIGEKAZU, MINECHIKA |
分类号 |
G11B7/09;G11B7/00;G11B7/0045;G11B7/08;G11B7/125;G11B7/13;G11B11/105 |
主分类号 |
G11B7/09 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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