Lens barrel and optical apparatus

Details Lens barrel and optical apparatus Lens barrel and optical apparatus

2006-10-24

2006-10-24

Perkey, W. B. (Department: 2851)

Photography

With exposure objective focusing means, focusing aid, or...

Mechanical mechanism for displacement of exposure objective

C359S823000

Reexamination Certificate

active

07127161

ABSTRACT:
A lens barrel is proposed, in which the optical adjustment of its lens system can be performed easily and at a reduced cost, and also an optical instrument having such a lens barrel is provided. A lens barrel is provided, which comprises: a lens frame for holding a lens; a holding frame for holding the lens frame; and an adjustment mechanism which, while allowing the lens frame to be pressed and fit into the holding frame thereof with a predetermined abutting force resulting from an elastic force, and while retaining its fit-in state, can adjust a position of the lens frame with regard to said holding frame in the directions of an optical axis via a plurality of stepwise stages by rotating said lens frame around its own axis of rotation.

REFERENCES:
patent: 3696725 (1972-10-01), Lange
patent: 4873542 (1989-10-01), Nakayama
patent: 5289320 (1994-02-01), Kobayashi

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