发明名称 |
OPTICAL PICKUP DEVICE, RECORDING AND REPRODUCING APPARATUS AND GAP DETECTION METHOD |
摘要 |
An optical pickup device and an optical recording and reproducing apparatus are suitable for use with a near-field optical recording and reproducing system. An optical pickup device comprises an objective lens composed of a solid immersion lens (SIL) the objective lens having a numerical aperture greater than 1, a beam splitter configured to reflect both of a p-polarized light component and an s-polarized light component of reflected lights from an optical recording medium when the optical pickup device irradiates the optical recording medium with a bundle of rays in a predetermined polarized state from a light source through the objective lens, a divider configured to divide incident light into a p-polarized light component and an s-polarized light component reflected by the beam splitter, and a photo-detector configured to separately detect the p-polarized light component and the s-polarized light component divided by the divider.
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申请公布号 |
US2007183298(A1) |
申请公布日期 |
2007.08.09 |
申请号 |
US20070736288 |
申请日期 |
2007.04.17 |
申请人 |
SONY CORPORATION |
发明人 |
SAITO KIMIHIRO;ISHIMOTO TSUTOMU |
分类号 |
G02B13/00;G11B7/00;G02B27/28;G11B7/09;G11B7/135 |
主分类号 |
G02B13/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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