发明申请
- 专利标题： OPTICAL INFORMATION DEVICE, OPTICAL DISC DRIVING DEVICE, OPTICAL INFORMATION RECORDING DEVICE, OPTICAL INFORMATION REPRODUCING DEVICE, GAP CONTROL METHOD, AND OPTICAL PICKUP
- 专利标题（中）： 光学信息装置，光盘驱动装置，光信息记录装置，光信息再现装置，光栅控制方法和光拾取
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申请号： US14005376申请日： 2012-04-11
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公开(公告)号： US20140010058A1公开(公告)日： 2014-01-09
- 发明人: Keiichi Matsuzaki , Kousei Sano , Hidenori Wada , Tatsuya Takaoka
- 申请人： Keiichi Matsuzaki , Kousei Sano , Hidenori Wada , Tatsuya Takaoka
- 优先权： JP2011-089874 20110414
- 国际申请： PCT/JP2012/002501 WO 20120411
- 主分类号： G11B27/36
- IPC分类号： G11B27/36
摘要：
An optical information device is provided with a first scattering medium (9), a second scattering medium (10), a third scattering medium (11); a diffraction element (4) which generates a plurality of light beams; an objective lens (6) which guides, to the first scattering medium (9) and to the third scattering medium (11) out of the first scattering medium (9), the second scattering medium (10), and the third scattering medium (11), two light beams out of the plurality of the light beams; and an arithmetic circuit (17) which detects a gap interval between the first scattering medium (9) and the third scattering medium (11), and an information medium (12), based on a change in an amount of reflected light from the first scattering medium (9) and from the third scattering medium (11).
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