Optical: systems and elements – Light control by opaque element or medium movable in or... – Electro-mechanical
Patent
1996-04-24
1998-01-06
Phan, James
Optical: systems and elements
Light control by opaque element or medium movable in or...
Electro-mechanical
359227, 396469, 396493, G02B 2602
Patent
active
057061203
ABSTRACT:
A device for controlling an amount of light allowed to reach a photosensitive surface includes a movable light regulating member, an electrically conductive coil mounted to move with the member, a first permanent magnet having a north pole located adjacent a first side of the coil, and a second permanent magnet having a south pole located adjacent the first side of the coil. The invention is characterized by third and fourth permanent magnets located adjacent a second side of the coil. A north pole of the third magnet is located opposite the south pole of the second magnet and a south pole of the fourth magnet is located opposite the north pole of the first magnet. When electrical current is passed through the coil in one direction, the member is moved in a first direction, and when electrical current is passed through the coil in another direction, the member is moved in a second direction.
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Bryant Robert Cooper
Colleluori Richard Alexander
O'Brien Michael Joseph
Eastman Kodak Company
Howley David A.
Phan James
Snee, III Charles E.
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