Imaging optical system and electronic apparatus using the same

Details Imaging optical system and electronic apparatus using the same Imaging optical system and electronic apparatus using the same

2006-03-07

2006-03-07

Spector, David N. (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S771000

Reexamination Certificate

active

07009784

ABSTRACT:
The image forming optical system of the present invention comprises, in order from an object side, a first lens which is meniscus lens having positive refracting power and a concave surface directed toward an object side, an aperture stop, a second lens having positive refracting power and a convex surface directed toward the object side, a third lens which is meniscus lens having negative refracting power and a convex surface directed toward an image side, and a fourth lens having positive refracting power.

REFERENCES:
patent: 5969883 (1999-10-01), Yamakawa et al.
patent: 2005/0013017 (2005-01-01), Amanai
patent: 2005/0057824 (2005-03-01), Amanai
patent: 11-084234 (1999-03-01), None
patent: 2000-171697 (2000-06-01), None

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