Zoom lens

Details Zoom lens Zoom lens

1997-01-22

2000-02-22

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

359685, 359693, 359695, 359698, 359684, 359700, G02B 1514, G02B 1522

Patent

active

060287144

ABSTRACT:
A zoom lens comprises a plurality of lens units movable along an optical axis for zooming and a lens unit movable along the optical axis for focusing, wherein the focusing lens unit moves integrally with one lens unit of the plurality of lens units in at least one zooming zone, and, in another zooming zone, moves while varying a separation thereof relative to the one lens unit.

REFERENCES:
patent: 3884555 (1975-05-01), Suwa et al.
patent: 4113355 (1978-09-01), Tsuji et al.
patent: 4178076 (1979-12-01), Tsuji et al.
patent: 4576444 (1986-03-01), Kawamura
patent: 4787719 (1988-11-01), Imai
patent: 4830477 (1989-05-01), Takashi et al.
patent: 5144492 (1992-09-01), Iijima et al.
patent: 5159494 (1992-10-01), Yamanashi
patent: 5467226 (1995-11-01), Watanabe
patent: 5568321 (1996-10-01), Ogawa et al.
patent: 5786941 (1998-07-01), Kuwana et al.

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