Lens barrel

Details Lens barrel Lens barrel

1997-05-09

1999-11-30

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

359699, 359701, G02B 1514

Patent

active

059953020

ABSTRACT:
A lens barrel of the present invention includes a fixed frame, a plurality of lens groups disposed on the inner circumference of the fixed frame movably along an optical axis direction with respect to the fixed frame, at least three lens holding frames for holding at least one lens group of a plurality of the lens groups, a cam frame having bottomed cam grooves to be coupled with the inner circumference of the fixed frame through cams, bottomed cam grooves across each other to be coupled with the lens holding frames through cams and a bottomed cam groove which is discontinued on one end surface and continued from the other end surface.

REFERENCES:
patent: 4787720 (1988-11-01), Fukita et al.
patent: 4864348 (1989-09-01), Fujiwara
patent: 5043752 (1991-08-01), Kohmoto
patent: 5082360 (1992-01-01), Sato et al.
patent: 5218479 (1993-06-01), Chiou et al.
patent: 5488513 (1996-01-01), Tanaka

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