发明名称 |
Optical pickup and disk drive unit |
摘要 |
The present invention relates to an optical pickup and a disc drive for preventing aberrations of laser light due to variations in temperature and humidity to ensure satisfactory characteristics of the laser light. A compound lens (14) is disposed in the optical path of the laser light, which is emitted by a light-emitting device (11) to be incident on a beam splitter (15), and in the optical path of the laser light, which exits from the beam splitter to be incident on a photodetector (13). The compound lens includes a diffractive section (23) for diffracting the laser light and a lens section (24) having a predetermined function for the laser light. The compound lens is formed by integrating individual sections including the diffractive section and the lens section. The compound lens is provided with a passage hole (14c) that lets in the laser light emitted by the light-emitting device to be incident on the beam splitter.
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申请公布号 |
US2004095870(A1) |
申请公布日期 |
2004.05.20 |
申请号 |
US20030473722 |
申请日期 |
2003.10.01 |
申请人 |
KOBAYASHI TAKASHI;TANIGUCHI TADASHI |
发明人 |
KOBAYASHI TAKASHI;TANIGUCHI TADASHI |
分类号 |
G11B7/12;G11B7/135;(IPC1-7):G11B7/135 |
主分类号 |
G11B7/12 |
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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