Lens barrel having a flare diaphragm mechanism

Details Lens barrel having a flare diaphragm mechanism Lens barrel having a flare diaphragm mechanism

1993-01-08

1995-02-21

Kwon, John T.

Optical: systems and elements

Lens

With variable magnification

359699, G02B 1302

Patent

active

053921607

ABSTRACT:
A lens barrel according to the present invention includes a first frame member which is moved in the direction of the optical axis with respect to a fixed member due to a predetermined operation; a second frame member which is moved in the direction of the optical axis with respect to the fixed member and the first frame member due to a predetermined operation; and a flare diaphragm engaging to the second frame member and interposed between the first frame member and the fixed member, wherein the flare diaphragm is engaged by one of the fixed member and the first frame member as a result of the movement of the second frame member in the direction of the optical axis due to the predetermined operation, so that the flare diaphragm is moved in the direction of the optical axis with respect to the second frame member.

REFERENCES:
patent: 4349265 (1982-09-01), Kobayashi et al.
patent: 4681406 (1987-08-01), Naito et al.
patent: 5037187 (1991-08-01), Oda et al.
patent: 5225939 (1993-07-01), Iizuka

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