发明授权
- 专利标题： Optical reading and writing device
- 专利标题（中）： 光学读写装置
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申请号： US200456申请日： 1994-02-23
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公开(公告)号： US5430699A公开(公告)日： 1995-07-04
- 发明人: Akira Matsubara , Takao Hayashi , Yutaka Murakami , Toru Nakamura , Hideki Aiko
- 申请人： Akira Matsubara , Takao Hayashi , Yutaka Murakami , Toru Nakamura , Hideki Aiko
- 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： JPX5-035106 19930224; JPX5-051925 19930312
- 主分类号： G11B7/095
- IPC分类号： G11B7/095 ; G11B7/00
摘要：
The relative tilt of an optical disk and a movable objective lens holder is measured as an output of a differential amplifier which subtracts an output of first photodetectors and which detect the reflected light from optical disk from an output of second photodetectors and which detect the reflected light from a reflector mounted on movable objective lens holder. The signal from differential amplifier is used to tilt movable objective lens holder so that the movable objective lens holder compensates the tilt of optical disk.
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