Invention Grant
- Patent Title: Objective lens and optical information recording/reproducing apparatus
- Patent Title (中): 物镜和光信息记录/重放装置
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Application No.: US13250135Application Date: 2011-09-30
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Publication No.: US08456979B2Publication Date: 2013-06-04
- Inventor: Satoshi Inoue , Shuichi Takeuchi
- Applicant: Satoshi Inoue , 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: JP2008-295552 20081119; JP2008-295553 20081119
- Main IPC: G11B7/135
- IPC: G11B7/135
Abstract:
An optical information recording/reproducing apparatus for an optical disc using a light beam having a wavelength of λ including: an objective lens that converges the light beam onto a recording surface of the optical disc and satisfies a condition: 0.48
Public/Granted literature
- US20120020198A1 OBJECTIVE LENS AND OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS Public/Granted day:2012-01-26
Information query
IPC分类:
