发明授权
- 专利标题： Pick-up device for use in an optical information recording system utilizing a diffraction grating with blaze characteristics
- 专利标题（中）： 拾取装置用于利用具有火焰特征的衍射光栅的光学信息记录系统
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申请号： US330429申请日： 1989-03-30
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公开(公告)号： US5050155A公开(公告)日： 1991-09-17
- 发明人: Yukio Kurata , Hideaki Sato , Yasuo Nakata , Nobuo Ogata
- 申请人： Yukio Kurata , Hideaki Sato , Yasuo Nakata , Nobuo Ogata
- 申请人地址： JPX Osaka
- 专利权人： Sharp Kabushiki Kaisha
- 当前专利权人： Sharp Kabushiki Kaisha
- 当前专利权人地址： JPX Osaka
- 优先权： JPX60-254483 19851111; JPX60-285960 19851228
- 主分类号： G11B7/12
- IPC分类号： G11B7/12 ; G11B7/135 ; G11B7/00
摘要：
A pick-up device which includes a light source and a condenser lens for effecting recording and reproduction of information by projecting a light beam as collected by the condenser lens onto a recording medium. A diffraction grating is provided between the light source and the condenser lens for dividing light returning from the recording medium by a diffraction grating so as to be directed to a photo-detector, to thereby obtain an optical detection signal.
公开/授权文献
- US4443673A Variable aspect arc chute 公开/授权日：1984-04-17
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