- 专利标题: Optical Pickup and Optical Disk Driving Apparatus Using the Same
- 专利标题(中): 光拾取和光盘驱动装置
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申请号: US12334616申请日: 2008-12-15
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公开(公告)号: US20090161525A1公开(公告)日: 2009-06-25
- 发明人: Fumio Isshiki , Koichi Hirose
- 申请人: Fumio Isshiki , Koichi Hirose
- 专利权人: Hitachi Media Electronics Co., Ltd
- 当前专利权人: Hitachi Media Electronics Co., Ltd
- 优先权: JP2007-329497 20071221
- 主分类号: G11B7/24
- IPC分类号: G11B7/24
摘要:
An operation mode is arranged to be switched between in recording/reproducing and in adjustment. A switching circuit with a hold circuit therefor is on a light receiving element including an optical pickup having a laser light source emitting a laser beam, an objective lens focusing the laser beam onto a recording layer of a disc, and a light receiving element receiving an optical signal modulated. The light receiving element is operable in an adjustment mode for selecting of the signal of an individual light-receiving surface and for outputting the same. The light receiving element is configured so that the address selection signal line in the adjustment mode may be used also as a sensitivity switching signal line. A compact and highly reliable optical pickup with less signal lines can be provided.