发明授权
- 专利标题: Optical disk apparatus
- 专利标题(中): 光盘装置
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申请号: US10430613申请日: 2003-05-05
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公开(公告)号: US07233564B2公开(公告)日: 2007-06-19
- 发明人: Kenji Shimozawa , Hiroshi Konuma , Hiroyuki Shindo , Masanori Tei , Takahiro Yamamoto
- 申请人: Kenji Shimozawa , Hiroshi Konuma , Hiroyuki Shindo , Masanori Tei , Takahiro Yamamoto
- 申请人地址: JP Musashino-shi
- 专利权人: TEAC Corpration
- 当前专利权人: TEAC Corpration
- 当前专利权人地址: JP Musashino-shi
- 代理机构: Christensen O'Connor Johnson Kindness PLLC
- 优先权: JP2002-132285 20020508; JP2002-138233 20020514
- 主分类号: G11B7/00
- IPC分类号: G11B7/00
摘要:
An optical disk apparatus which records/reproduces data on/from a plurality of types of optical disks. The optical disk apparatus has a plurality of laser diodes. Two laser light rays emanating from two laser diodes are coupled together by means of a coupling prism. The thus-coupled laser light is radiated onto an optical disk. A photodetector is disposed in close proximity to the coupling prism. The coupling prism guides, to the photodetector, a laser light component of at least one laser light ray of the two laser light to be coupled together, the component having not been radiated onto the optical disk on an optical path. Laser light which is not radiated onto the optical disk on the optical path includes diffracted light other than a main beam emanating from the laser diode or laser beam which has not been subjected to coupling at the coupling surface of the coupling prism. When laser light for a CD is caused to pass through the coupling surface and laser light for a DVD is reflected by the same, the CD laser light which is reflected from the coupling surface or the DVD laser light which passes through the coupling surface is guided to the photodetector. The power of a main beam of the laser light is controlled in accordance with the power of the laser light detected by the photodetector.
公开/授权文献
- US20030210632A1 Optical disk apparatus 公开/授权日:2003-11-13