Invention Grant
- Patent Title: Optical pickup device
- Patent Title (中): 光学拾取装置
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Application No.: US12146883Application Date: 2008-06-26
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Publication No.: US07990831B2Publication Date: 2011-08-02
- Inventor: Daisuke Koreeda , Shuichi Takeuchi
- Applicant: Daisuke Koreeda , 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: JP2007-184859 20070713
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
An optical pickup device includes a first light source emitting first light with a first wavelength, a second light source emitting second light with a second wavelength, a third light source emitting third light with a third wavelength, an objective lens having a step structure, the objective lens being disposed to satisfy predetermined conditions, at least one first coupling lens making the first light and the second light incident onto the objective lens as converged light, a second coupling lens making the third light incident onto the objective lens as diverging light, and a liquid crystal aberration correcting element.
Public/Granted literature
- US20090016194A1 Optical Pickup Device Public/Granted day:2009-01-15
Information query
IPC分类: