Iris diaphragm for high speed photographic printers

Details Iris diaphragm for high speed photographic printers Iris diaphragm for high speed photographic printers

1998-01-06

1999-11-30

Metjahic, Safet

Photography

Camera detail

Diaphragm

355 71, 310 74, G03B 902, G03B 2772, H02K 702

Patent

active

059930799

ABSTRACT:
An iris diaphragm for selectively varying a diameter of an aperture, the iris diaphragm comprises at least two movable blades which are adaptable for forming the aperture; and a plurality of ceramic motors respectively attached to each one of the blades for causing said blades to vary the aperture formed therefrom.

REFERENCES:
patent: 4381146 (1983-04-01), Yoshino et al.
patent: 4444489 (1984-04-01), Bartel et al.
patent: 4851870 (1989-07-01), Tanaka et al.
patent: 4862207 (1989-08-01), Asakura et al.
patent: 4926107 (1990-05-01), Pinson
patent: 5453653 (1995-09-01), Zumeris
patent: 5616980 (1997-04-01), Zumeris
patent: 5635999 (1997-06-01), O'Brien et al.
patent: 5767950 (1998-06-01), Hawver et al.

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