Invention Grant
- Patent Title: Optical pickup device
- Patent Title (中): 光学拾取装置
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Application No.: US12153503Application Date: 2008-05-20
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Publication No.: US07792004B2Publication Date: 2010-09-07
- Inventor: Mika Hamaoka , Tetsuya Shihara
- Applicant: Mika Hamaoka , Tetsuya Shihara
- Applicant Address: JP Osaka
- Assignee: Funai Electric Co., Ltd.
- Current Assignee: Funai Electric Co., Ltd.
- Current Assignee Address: JP Osaka
- Agency: Morgan Lewis & Bockius LLP
- Priority: JP2007-138638 20070525
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
An optical pickup device includes: a light source; an objective lens which condenses a light beam that is emitted from the light source on a recording layer of an optical recording medium; and a photo detector which receives reflected light that is reflected by the optical recording medium. Further on an optical path between the light source and the objective lens, a liquid lens which performs correction of spherical aberration by changing state of convergence or divergence of the input light beam and a liquid crystal element on which a plurality of phase shift regions are formed to adjust phase of the input light beam, and which performs correction of the spherical aberration by phase adjustment of the phase shift regions are arranged.
Public/Granted literature
- US20080291808A1 Optical pickup device Public/Granted day:2008-11-27
Information query
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