Invention Grant
- Patent Title: Optical pickup lens
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Application No.: US13331084Application Date: 2011-12-20
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Publication No.: US08270282B2Publication Date: 2012-09-18
- Inventor: Mitsuru Ito
- Applicant: Mitsuru Ito
- Applicant Address: JP Ibaraki-Shi
- Assignee: Hitachi Maxell, Ltd.
- Current Assignee: Hitachi Maxell, Ltd.
- Current Assignee Address: JP Ibaraki-Shi
- Agency: Oliff & Berridge, PLC
- Priority: JP2006-303396 20061108
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
An optical pickup lens for focusing a light beam from a laser light source on an optical information recording medium is a single lens. The optical pickup lens has two surfaces, and a surface R2 opposite to a surface R1 closer to the laser light source has a continuous shape. When the surface R2 has radii h1, h2 and h3 (h1 Δsag1>Δsag2 and Δsag2
Public/Granted literature
- US20120087227A1 OPTICAL PICKUP LENS Public/Granted day:2012-04-12
Information query
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