Zoom lens device

Details Zoom lens device Zoom lens device

2005-08-16

2005-08-16

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S686000, C359S689000

Reexamination Certificate

active

06930839

ABSTRACT:
A zoom lens device has a zoom lens system having a plurality of lens units; and an image sensor converting an optical image formed by the zoom lens system, into electric image data. The zoom lens system has a first lens unit disposed on the most object side and consisting of a single negative lens element, a second lens unit having a positive optical power; and a diaphragm disposed on the object or the image side of the second lens unit, or in the second lens unit. Zooming is performed by varying the distances between the lens units. Focus adjustment by varying the object distance is performed by moving along the optical axis a positive lens unit or a single lens element disposed in a position on the image side of the diaphragm and not included in the most image side lens unit.

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