Image-formation optical system, and imaging system...

Optical: systems and elements – Lens – Multiple component lenses

Reexamination Certificate

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Details

C359S784000

Reexamination Certificate

active

10728745

ABSTRACT:
The invention relates to an image-formation optical system that meets both demands for high performance and compactness, and an imaging system that incorporates the same. The imaging system is built up of an image-formation optical system comprises, in order from its object side, an aperture stop S, a first positive single lens L1wherein the absolute value of the axial radius curvature of its image side-surface is smaller than that of its object side-surface, a second negative single lens L2wherein the absolute value of the axial radius curvature of its image side-surface is smaller than that of its object side-surface and a third positive single lens L3, three single lenses in all, and an image pickup device located on the image plane I of the image-formation optical system.

REFERENCES:
patent: 6259508 (2001-07-01), Shigematsu
patent: 6441971 (2002-08-01), Ning
patent: 6466377 (2002-10-01), Saito et al.
patent: 2004/0223068 (2004-11-01), Kamo
patent: 01-144007 (1989-06-01), None
patent: 02-191907 (1990-07-01), None
patent: 04-153612 (1992-05-01), None
patent: 05-188284 (1993-07-01), None
patent: 09-288235 (1997-11-01), None
patent: 2001-075006 (2001-03-01), None

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