Zoom lens barrel

Details Zoom lens barrel Zoom lens barrel

1999-04-06

2000-04-11

Ben, Loha

Optical: systems and elements

Lens

With variable magnification

359699, 359826, 396 83, 396349, G02B 1514

Patent

active

060494328

ABSTRACT:
A zoom lens barrel includes at least two lens groups, a linear movement guide tube for guiding a linear movement of the lens groups along the optical axis and a cam tube for reciprocating the lens groups along the optical axis. The guide tube has a guiding portion formed on a film side end portion of the guide tube and extends in parallel with a film surface.

REFERENCES:
patent: 3715929 (1973-02-01), Konigslehne et al.
patent: 4114984 (1978-09-01), Muryoi
patent: 4779964 (1988-10-01), Ozawa et al.
patent: 5014077 (1991-05-01), Yomogizawa et al.
patent: 5243467 (1993-09-01), Tanaka
patent: 5313329 (1994-05-01), Ueda
patent: 5687029 (1997-11-01), Omi et al.
patent: 5701523 (1997-12-01), Omiya et al.

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