Invention Grant
- Patent Title: Objective lens for optical pick-up
- Patent Title (中): 物镜用于光学拾取
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Application No.: US12103910Application Date: 2008-04-16
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Publication No.: US08089705B2Publication Date: 2012-01-03
- Inventor: Naoki Yamagata , Shuichi Takeuchi
- Applicant: Naoki Yamagata , Shuichi Takeuchi
- Applicant Address: JP Tokyo
- Assignee: Hoya Corporation
- Current Assignee: Hoya Corporation
- Current Assignee Address: JP Tokyo
- Agency: Greenblum & Bernstein P.L.C.
- Priority: JP2007-112814 20070423
- Main IPC: G02B13/18
- IPC: G02B13/18
Abstract:
There is provided an objective lens for an optical pick-up. The objective lens includes a first surface on a light source side, and a second surface on an optical disc side. The first surface has a convex shape. The objective lens is formed to be a single-element lens having a numerical aperture of 0.75 or more. In this configuration, the objective lens satisfies a condition: 0.95
Public/Granted literature
- US20080259775A1 OBJECTIVE LENS FOR OPTICAL PICK-UP Public/Granted day:2008-10-23
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