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

2005-02-22

2005-02-22

Spector, David N. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S726000, C359S846000

Reexamination Certificate

active

06859332

ABSTRACT:
A zoom optical system includes a deformable element having a focusing function and two lens groups movable in a magnification change and having a magnification varying function or a compensating function for compensating for a shift of an image surface. Alternatively, a zoom optical system includes, in order from the object side, a first group having a negative power and being fixed in a magnification change, a second group having a positive power and being movable in a magnification change, and a third group movable in a magnification change. The first group has a deformable element having a focusing function. An imaging apparatus is provided with either zoom optical system. Whereby, a high-performance zoom optical system with small fluctuation of aberrations in spite of use of a deformable element and a photographing apparatus using the same zoom optical system are provided.

REFERENCES:
patent: 6464363 (2002-10-01), Nishioka et al.
patent: 6618209 (2003-09-01), Nishioka et al.
patent: 20020136150 (2002-09-01), Mihara et al.
patent: 20030179464 (2003-09-01), Amanai
patent: 20040027684 (2004-02-01), Nishioka et al.
patent: 20040070843 (2004-04-01), Nishioka et al.

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