发明申请
- 专利标题: OBJECTIVE LENS, OPTICAL PICK-UP DEVICE, AND OPTICAL DISK DEVICE
- 专利标题(中): 目标镜头,光学拾取器件和光盘设备
-
申请号: US11866837申请日: 2007-10-03
-
公开(公告)号: US20080031103A1公开(公告)日: 2008-02-07
- 发明人: Shogo HORINOUCHI , Takashi Haruguchi , Taiichi Mori , Hideki Yoshinaka , Nobuyuki Tokubuchi , Shin Ishibashi , Hitoshi Asahi
- 申请人: Shogo HORINOUCHI , Takashi Haruguchi , Taiichi Mori , Hideki Yoshinaka , Nobuyuki Tokubuchi , Shin Ishibashi , Hitoshi Asahi
- 申请人地址: JP Osaka
- 专利权人: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
- 当前专利权人: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
- 当前专利权人地址: JP Osaka
- 优先权: JP2003-192670 20030707; JP2003-312459 20030904; JP2003-331155 20030924; JP2003-408627 20031208; JP2003-414473 20031212
- 主分类号: G11B7/00
- IPC分类号: G11B7/00
摘要:
An optical pickup device includes light sources for respectively emitting a plurality of different wavelengths of light, a unit structured for causing at least a part of the light emitted from the light sources to pass a same optical path; and a focusing unit for focusing the light. The focusing unit includes at least first and second focusing parts, the first focusing part being to focus mainly a wavelength of light different from a wavelength of light to be mainly focused by the second focusing part. The optical pickup device and optical disk device are capable of realizing at least one of thickness reduction, size reduction and suppression against characteristic deterioration even where coping with various wavelengths of laser including a blue laser.
公开/授权文献
信息查询
IPC分类: