发明名称 |
Optical pickup apparatus and signal recording and/or reproducing apparatus |
摘要 |
While supporting an optical disc having a recording density that is higher than conventional optical discs by shortening the wavelength of the emitted light and increasing the numerical aperture (NA) of an objective lens, a reduction in the size of an optical pickup apparatus relative to the size of a disc cartridge that houses the optical disc is achieved. The present invention includes a fixed optical system having a built-in light source, and a movable optical system having an objective lens. A parallel light beam that enters the movable optical system from the fixed optical system enters the movable optical system via a light path that is parallel to the direction in which the objective lens is movable and from the side on which a spindle motor is provided.
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申请公布号 |
US2004081062(A1) |
申请公布日期 |
2004.04.29 |
申请号 |
US20030610995 |
申请日期 |
2003.07.01 |
申请人 |
NETSU NAOHIRO;ANDO NOBUHIKO |
发明人 |
NETSU NAOHIRO;ANDO NOBUHIKO |
分类号 |
G11B7/135;G11B7/08;G11B7/085;G11B7/12;(IPC1-7):G11B7/135 |
主分类号 |
G11B7/135 |
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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