Image-formation optical system, and imaging system

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

2006-05-16

2006-05-16

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S784000, C359S716000

Reexamination Certificate

active

07046460

ABSTRACT:
The invention relates to an image-formation optical system that satisfies demands toward high performance and compactness at the same time, and an imaging system incorporating the same. The image-formation optical system comprises, in order from its object side, an aperture stop S, a first positive meniscus lens L1 convex on its object side, a second positive lens L2 having an aspheric surface and a third negative lens L3 having an aspheric surface, and satisfies the following condition.in-line-formulae description="In-line Formulae" end="lead"?0.95<Σd/f<1.25  (1)in-line-formulae description="In-line Formulae" end="tail"?Here Σd is the distance on an optical axis of the image-formation optical system from the object side-surface of the first positive meniscus lens to the image plane side-surface of the third negative lens, and f is the focal length of the image-formation optical system.

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