Condenser lens for an objective lens system

Details Condenser lens for an objective lens system Condenser lens for an objective lens system

2009-06-29

2011-12-13

Tran, Thang (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

08077585

ABSTRACT:
An objective lens system for an optical pickup apparatus, includes in order from an object side: a first lens group having negative paraxial power P1(mm−1); and a second lens group having positive paraxial power P2(mm−1) for converging a light flux emitted from the first lens group on an information recording surface of an optical information recording medium.

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