Zoom lens barrel with reversible telephoto lens movement

Details Zoom lens barrel with reversible telephoto lens movement Zoom lens barrel with reversible telephoto lens movement

1997-05-02

1998-09-08

Epps, Georgia Y.

Optical: systems and elements

Lens

With variable magnification

G02B 1514

Patent

active

058053549

ABSTRACT:
In order to improve zooming operability, there is disclosed a zoom lens barrel comprising a driving mechanism for driving an optical system in the direction of an optical axis while being moved in the direction of the optical axis during a zooming operation, wherein at least a part of the optical system is a U-turn optical system which changes its moving direction during the zooming operation. The zoom lens barrel includes another driving mechanism for driving the U-turn optical system, which is not moved in the direction of the optical axis and provided independently of the former driving mechanism.

REFERENCES:
patent: 4976523 (1990-12-01), Ishikawa
patent: 5016993 (1991-05-01), Akitake
patent: 5140468 (1992-08-01), Kayanuma
patent: 5144490 (1992-09-01), Yamanouchi
patent: 5159370 (1992-10-01), Takahashi
patent: 5204710 (1993-04-01), Tsukamoto et al.
patent: 5210644 (1993-05-01), Nomura
patent: 5282090 (1994-01-01), Suzuki et al.
patent: 5486888 (1996-01-01), Shiina et al.
patent: 5576894 (1996-11-01), Kuwana et al.

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