Invention Grant
- Patent Title: Objective lens for optical pickup and optical pickup device
- Patent Title (中): 用于光学拾取和光学拾取装置的物镜
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Application No.: US13224016Application Date: 2011-09-01
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Publication No.: US08406108B2Publication Date: 2013-03-26
- Inventor: Yohei Nakagawa
- Applicant: Yohei Nakagawa
- Applicant Address: JP Moriguchi-shi, Osaka
- Assignee: Sanyo Electric Co., Ltd.
- Current Assignee: Sanyo Electric Co., Ltd.
- Current Assignee Address: JP Moriguchi-shi, Osaka
- Agency: Ditthavong Mori & Steiner, P.C.
- Priority: JP2010-196823 20100902
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
An objective lens for an optical pickup device is provided with a light-source-side lens surface by which laser light is converged, and a disc-side lens surface by which the laser light converged by the light-source-side lens surface is converged. The first lens surface and the second lens surface are configured to guide a part of a light collecting portion of the laser light reflected on the second lens surface to a position on an outside of the first lens surface.
Public/Granted literature
- US20120057447A1 OBJECTIVE LENS FOR OPTICAL PICKUP AND OPTICAL PICKUP DEVICE Public/Granted day:2012-03-08
Information query
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