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1. 发明申请

US20090135705A1 OPTICAL PICKUP AND OPTICAL DISC DEVICE 失效
标题翻译：光学拾取和光盘设备
公开(公告)号：US20090135705A1
公开(公告)日：2009-05-28
申请号：US12245847
申请日：2008-10-06
申请人： Kazumasa KANEDA , Yoshito ASOMA , Kazuyuki TAKAHASHI
发明人： Kazumasa KANEDA , Yoshito ASOMA , Kazuyuki TAKAHASHI
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G11B7/1275 , G11B7/1374 , G11B7/13922 , G11B2007/0006
摘要： An optical pickup for performing recording and/or playback of information by selectively irradiating the corresponding wavelength optical beam to first through third optical discs having a protection layer with different thickness, includes emission units for emitting first-wavelength through third-wavelength optical beams corresponding to the respective optical discs respectively, a condensing optical device for condensing each wavelength optical beam on an optical disc signal recording face, a divergence angle transformation device, which can be moved in the optical axis direction, for transforming the divergence angle of each wavelength optical beam according to the moved position in the optical axis direction so as to obtain a predetermined divergence angle, and a detector having a common light receiving unit for receiving each wavelength optical beam separated by an optical path separating unit and returned, with the condensing optical device condensing each wavelength optical beam on the corresponding optical disc signal recording face appropriately.
摘要翻译：用于通过选择性地将相应的波长光束照射到具有不同厚度的保护层的第一至第三光盘来执行信息的记录和/或重放的光学拾取器包括用于通过与第一波长相对应的第三波长光束发射第一波长的发射单元相应的光盘，用于聚光光盘信号记录面上的每个波长光束的聚光光学装置，可沿光轴方向移动的发散角变换装置，用于变换每个波长光束的发散角根据光轴方向的移动位置以获得预定的发散角;以及检测器，其具有用于接收由光路分离单元分离的每个波长光束的共同的光接收单元，并且返回，聚光光学装置冷凝每个波长光学bea m对应的光盘信号记录面。

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