Optical diaphragm apparatus

Details Optical diaphragm apparatus Optical diaphragm apparatus

2006-10-04

2009-12-22

Koval, Melissa J. (Department: 2862)

Photography

Camera detail

Diaphragm

C396S449000

Reexamination Certificate

active

07635229

ABSTRACT:
An ion conducting high-polymer member is formed by an ion containing polymer, and has a circular arc shape. An chord length of the ion conducting high-polymer member is changed. Due to the change in the chord length of the ion conducting high-polymer member, there is change in a relative position of a driving shaft which is coupled with the ion conducting high-polymer member, with respect to a rotating shaft. Due to the change in the relative position of the driving shaft, a circular ring shaped peripheral section is displaced, and due to a rotation of a diaphragm member around the rotating shaft as a center, a part of an aperture is shielded by the circular ring shaped peripheral section, and a diameter of the aperture is changed.

REFERENCES:
patent: 5150702 (1992-09-01), Miyanaga et al.
patent: 5490015 (1996-02-01), Umeyama et al.
patent: 3204793 (2001-06-01), None
patent: 2002330598 (2002-11-01), None

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