发明名称 |
Optical information reproducing method, optical head device, and optical information processor |
摘要 |
An optical information reproducing method of the present invention is used for an optical recording medium. The optical recording medium includes a recording layer containing information and a mask layer that is located close to the recording layer and includes a nonlinear optical material whose optical properties are changed in accordance with incident light intensity. The method includes irradiating the optical recording medium with convergent light that is polarized in a first direction and dividing reflected light from the optical recording medium into a first polarized component that is polarized in the first direction and a second polarized component that is polarized in a second direction perpendicular to the first direction. The second polarized component is used to detect a reproduction signal.
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申请公布号 |
US2005041558(A1) |
申请公布日期 |
2005.02.24 |
申请号 |
US20040498389 |
申请日期 |
2004.06.10 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD |
发明人 |
YAMAMOTO HIROAKI;SHIONO TERUHIRO |
分类号 |
G11B7/005;G11B7/135;G11B7/24;G11B7/257;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/005 |
代理机构 |
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地址 |
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