Invention Grant
- Patent Title: Optical pickup lens
-
Application No.: US12662173Application Date: 2010-04-02
-
Publication No.: US07859978B2Publication Date: 2010-12-28
- Inventor: Mitsuru Ito
- Applicant: Mitsuru Ito
- Applicant Address: JP Osaka
- Assignee: Hitachi Maxell, Ltd.
- Current Assignee: Hitachi Maxell, Ltd.
- Current Assignee Address: JP Osaka
- 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
- US20100195220A1 Optical pickup lens Public/Granted day:2010-08-05
Information query
IPC分类: