Zoom lens and electronic imaging apparatus having the same

Details Zoom lens and electronic imaging apparatus having the same Zoom lens and electronic imaging apparatus having the same

2006-02-07

2006-02-07

Epps, Georgia (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S690000, C359S676000

Reexamination Certificate

active

06995922

ABSTRACT:
An optical apparatus is provided with a zoom optical system. The zoom optical system includes a lens unit located at the most object-side position and a moving lens unit with positive refracting power, located on the image side of the lens unit. The lens unit includes a single positive lens and the moving lens unit is simply moved toward the object side when the magnification of the zoom lens is changed in the range from a wide-angle position to a telephoto position so as to satisfy the following condition:in-line-formulae description="In-line Formulae" end="lead"?0.8<y07/(fw·tan ω07w)<0.96in-line-formulae description="In-line Formulae" end="tail"?where fw is the focal length of the entire system of the zoom lens at the wide-angle position, y07is an image height expressed by 0.7×y10, where y10is a distance from the center to a point farthest therefrom on the effective imaging surface of an electronic image sensor, and ω07wis an angle made by a direction of an object point with an optical axis, where the object point corresponds to an image point that is at the point y07away from the center on the effective imaging surface of the electronic image sensor at the wide angle position.

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