发明申请
- 专利标题: Optical pickup device
- 专利标题(中): 光学拾取装置
-
申请号: US11709132申请日: 2007-02-22
-
公开(公告)号: US20070297031A1公开(公告)日: 2007-12-27
- 发明人: Masahiko Nishimoto , Naoki Nakanishi , Masayuki Ono , Yasuyuki Kochi
- 申请人: Masahiko Nishimoto , Naoki Nakanishi , Masayuki Ono , Yasuyuki Kochi
- 优先权: JP2006-172918 20060622
- 主分类号: G02B5/32
- IPC分类号: G02B5/32
摘要:
An optical pickup device includes a first semiconductor laser device, a second semiconductor laser device, a third semiconductor laser device, a first diffraction grating, a beam splitter, a quarter-wave plate, a collimator lens, a first polarization hologram device, a second polarization hologram device and a third polarization hologram device. The second semiconductor laser device and the third semiconductor laser device are provided in a light source/detection unit together with a second diffraction grating and photo-receiver groups, so as to make the optical pickup device compact.