Zoom optical system and imaging apparatus using the same

Details Zoom optical system and imaging apparatus using the same Zoom optical system and imaging apparatus using the same

2005-06-14

2005-06-14

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S686000, C359S689000, C359S691000, C359S708000, C359S726000, C359S627000

Reexamination Certificate

active

06906867

ABSTRACT:
A zoom optical system includes at least two optical-element groups and a variable optical-property optical element. The two optical-element groups are movable in a magnification change and have a magnification varying function or a compensating function for compensating for a shift of an image surface caused by the magnification change. The optical element has a focusing function and is disposed on the image side of the optical-element groups. According to this configuration of the zoom optical system, it is possible to attain a zoom optical system and an imaging apparatus using the zoom optical system that have as small a number of movable lenses as possible, are very small in size, and work with an extremely low power consumption and low operation noise.

REFERENCES:
patent: 2003/0147146 (2003-08-01), Mikami
patent: 08-248318 (1996-09-01), None
patent: 11-220646 (1999-08-01), None

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