发明申请
- 专利标题: OPTICAL PICKUP DEVICE AND OPTICAL PICKUP SUPPORTING DEVICE
- 专利标题(中): 光学拾取器件和光学拾取器支持器件
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申请号: US13501417申请日: 2011-06-14
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公开(公告)号: US20120201116A1公开(公告)日: 2012-08-09
- 发明人: Yasufumi Yamagishi
- 申请人: Yasufumi Yamagishi
- 优先权: US61/251656 20091014
- 国际申请: PCT/JP2011/064000 WO 20110614
- 主分类号: G11B7/1374
- IPC分类号: G11B7/1374
摘要:
In order to achieve further cost reduction while the package size of an optical pickup having two objective lenses and the restriction on the disposition of the two objective lenses are maintained, an optical system for laser light emitted from a red/infrared dual-wavelength laser diode is disposed such that a parallel plate beam splitter is disposed to be inclined with respect to the optical axis of focused light of the laser light reflected by an optical disk and the optical axis of the laser light between a rising mirror and the parallel plate beam splitter is inclined from the signal track direction of the optical disk. The laser light to which astigmatism is given by transmission through the parallel plate beam splitter is caused to be directly incident on a light detector without passing through an astigmatism adjustment optical element.
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