Lens barrel with a rotational motion transmitting portion

Details Lens barrel with a rotational motion transmitting portion Lens barrel with a rotational motion transmitting portion

1996-08-26

1997-12-02

Epps, Georgia Y.

Optical: systems and elements

Lens

With variable magnification

359699, G02B 1514

Patent

active

056942540

ABSTRACT:
A lens barrel including a lens holding cylinder holding a lens unit and rotatable about the optical axis of the lens barrel, and a holding cylinder rotating mechanism for rotatively moving the lens holding cylinder to thereby move the lens unit along the optical axis, the holding cylinder rotating mechanism having a rotatable portion disposed outside a fixed cylinder and effecting rotational motion, a rotational motion transmitting portion for transmitting only the rotational motion about the optical axis of the rotational motion of the rotatable portion to the inside of the fixed cylinder, and a holding cylinder rotating portion for transmitting the motion of the rotational motion transmitting portion along the direction of the optical axis and rotating the lens holding cylinder.

REFERENCES:
patent: 2873646 (1953-02-01), Angenieux
patent: 3765748 (1973-10-01), Mito
patent: 5218479 (1993-06-01), Chiou et al.
patent: 5285322 (1994-02-01), Horning et al.

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