Objective lens with the diffractive surface for DVD/CD...

Details Objective lens with the diffractive surface for DVD/CD... Objective lens with the diffractive surface for DVD/CD...

2006-01-31

2006-01-31

Epps, Georgia (Department: 2873)

Optical: systems and elements

Lens

Including a nonspherical surface

C359S741000, C369S044230, C369S112070

Reexamination Certificate

active

06992838

ABSTRACT:
Disclosed is an objective lens for a DVD/CD compatible optical pickup, which improves optical efficiency while minimizing aberration occurring due to different disc thicknesses of different optical storage media. The objective lens has first and second aspherical lens surfaces.

REFERENCES:
patent: 09145995 (1997-06-01), None
patent: 2000081566 (2000-03-01), None
patent: 2001051192 (2001-02-01), None

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