Lens barrel

Details Lens barrel Lens barrel

1996-11-26

1998-02-10

Nelms, David C.

Optical: systems and elements

Lens

With variable magnification

359703, 359704, G02B 1514

Patent

active

057175284

ABSTRACT:
A lens barrel includes a lens holding barrel holding a lens, a containing barrel containing the lens holding barrel therein, a plurality of inwardly directed projections provided on the inner peripheral surface of the containing barrel, and a plurality of groups of outwardly directed projections provided on the outer peripheral surface of the lens holding barrel, each of the plurality of groups of outwardly directed projections having the same number of outwardly directed projections as the number of the inwardly directed projections, the plurality of inwardly directed projections bearing against respective ones of the outwardly directed projections in one group at a time to position the optical axis to the lens, virtual circles circumscribed on the outwardly directed projections in the respective groups having the same size in a plane perpendicular to the optical axis, the centers of the virtual circles lying at different positions.

REFERENCES:
patent: 5249082 (1993-09-01), Newman
patent: 5424873 (1995-06-01), Uziie et al.

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