Objective lens and optical pickup device

Details Objective lens and optical pickup device Objective lens and optical pickup device

2011-04-12

2011-04-12

Agustin, Peter Vincent (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

Reexamination Certificate

active

07924686

ABSTRACT:
An objective lens for converging light onto a recording surface of an optical information recording medium in order to perform at least one of recording, reproduction and deletion of information on the optical information recording medium. The objective lens is a bi-convex single lens having at least one aspheric surface, and satisfies the following conditions: 0.8<R1/r1<0.85 and 0.9<d/f<1.1. Here, a numerical aperture NA on the optical information recording medium side of the objective lens satisfies NA≧0.85. R1 is a paraxial curvature radius [mm] on a light source side of the objective lens, r1 is an effective radius [mm] on a light source side of the objective lens, d is a thickness [mm] on the optical axis of the objective lens, and f is a focal length [mm] of the objective lens.

REFERENCES:
patent: 5553052 (1996-09-01), Oono et al.
patent: 6529465 (2003-03-01), Kase et al.
patent: 7187641 (2007-03-01), Sakamoto
patent: 2004/0047049 (2004-03-01), Ota et al.
patent: 2004/0156304 (2004-08-01), Sakamoto
patent: 2003-091854 (2003-03-01), None
Co-pending U.S. Appl. No. 12/128,255 filed, May 28, 2008 (allowed claims provided).

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