Collapsible lens barrel

Details Collapsible lens barrel Collapsible lens barrel

1997-11-17

1999-05-04

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

359704, 359705, 359823, 359826, G02B 1514, G02B 1522, G02B 702

Patent

active

059009926

ABSTRACT:
A lens barrel capable of shortening its full length includes a photo-taking optical system with a rear unit lens and a front unit lens, a rear unit lens holding cylinder holding the rear unit lens, a front unit lens holding cylinder holding the front unit lens and movable in the direction of an optical axis relative to the rear unit lens between a photographing position for making the photo-taking optical system capable of photographing with the rear unit lens and a full length shortening position for shortening the full length of the lens barrel in the direction of the optical axis and a fixing member for fixing the front unit lens holding cylinder in one of the aforementioned positions relative to the rear unit lens holding cylinder.

REFERENCES:
patent: 4557576 (1985-12-01), Drefchinski
patent: 5181144 (1993-01-01), Shirie et al.

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