Objective lens, optical head, and optical pickup apparatus

Details Objective lens, optical head, and optical pickup apparatus Objective lens, optical head, and optical pickup apparatus

2005-03-24

2010-02-02

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S044230, C359S644000

Reexamination Certificate

active

07656774

ABSTRACT:
An objective lens for at least one of recording and reproducing for an optical information recording medium includes in the order from a light source side: a first lens group having negative refracting power, which is in a meniscus shape having a concave surface facing the light source side; a second lens group having positive refracting power; and a third lens group having positive refracting power, which is in a meniscus shape having a concave surface facing an image side.

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