发明授权
US5253239A Control apparatus for tracking a light beam on a track of an optical
recording medium
失效
用于跟踪光记录介质的光道上的光束的控制装置
- 专利标题： Control apparatus for tracking a light beam on a track of an optical recording medium
- 专利标题（中）： 用于跟踪光记录介质的光道上的光束的控制装置
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申请号： US614496申请日： 1990-11-16
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公开(公告)号： US5253239A公开(公告)日： 1993-10-12
- 发明人: Yasuaki Edahiro , Katsuya Watanabe , Mitsuro Moriya
- 申请人： Yasuaki Edahiro , Katsuya Watanabe , Mitsuro Moriya
- 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： JPX1-305419 19891124; JPX2-101960 19900418
- 主分类号： G11B7/09
- IPC分类号： G11B7/09 ; G11B7/095
摘要：
A tracking control apparatus is disclosed, in which a light beam is focused on an optical recording medium to form a light spot thereon, and a tracking error signal corresponding to a maximum or minimum point of total reflected light from a portion of the optical recording medium, which is irradiated by the light spot, is detected and used as a desired value for tracking servo control, whereby accurate tracking servo control can be made without producing any offset even when the surface of the optical recording medium is inclined or the optical axis of the light reflected from the optical recording medium deviates from a proper direction.
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