Invention Grant
- Patent Title: Objective lens, optical pick-up device, and optical disk device
- Patent Title (中): 物镜,光学拾取装置和光盘装置
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Application No.: US12860583Application Date: 2010-08-20
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Publication No.: US07920442B2Publication Date: 2011-04-05
- Inventor: Shogo Horinouchi , Takashi Haruguchi , Taiichi Mori , Hideki Yoshinaka , Nobuyuki Tokubuchi , Shin Ishibashi , Hitoshi Asahi
- Applicant: Shogo Horinouchi , Takashi Haruguchi , Taiichi Mori , Hideki Yoshinaka , Nobuyuki Tokubuchi , Shin Ishibashi , Hitoshi Asahi
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Dickinson Wright PLLC
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
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.
Public/Granted literature
- US20100315935A1 OBJECTIVE LENS, OPTICAL PICK-UP DEVICE, AND OPTICAL DISK DEVICE Public/Granted day:2010-12-16
Information query
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