Magnetic actuator for adjusting an iris diaphragm in an...

Details Magnetic actuator for adjusting an iris diaphragm in an... Magnetic actuator for adjusting an iris diaphragm in an...

2005-08-02

2008-11-25

Barrera, Ramon M (Department: 2832)

Photography

Camera detail

Diaphragm

C396S463000, C335S222000, C335S229000

Reexamination Certificate

active

07455466

ABSTRACT:
A magnetic actuator. A yoke comprises a first opening and a second opening, a frame, and a path. A first magnet is disposed in the first opening in the vicinity of the frame. A second magnet is disposed in the second opening in the vicinity of the frame. A coil comprises a wire surrounding the path. A light shield is connected to an end of the coil. When current passes through the coil, the coil moves along the path by magnetic induction between the first magnet and the second magnet such that the iris diaphragm is adjustable by the light shield.

REFERENCES:
patent: 4758750 (1988-07-01), Itagaki et al.
patent: 4808955 (1989-02-01), Godkin et al.
patent: 4882508 (1989-11-01), Mawla
patent: 7161768 (2007-01-01), Oveyssi

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