1994-02-14
1996-09-10
Gellner, Michael L.
G03B 908
Patent
active
055550592
ABSTRACT:
Disclosed is an electromagnetic lens shutter apparatus of simple construction which can be applied to a camera having an automatic exposure control function and an automatic focus control function. The electromagnetic lens shutter apparatus comprises a lens mount; at least two sheet-like lens shutter blades; an exposure adjustment ring; opening means for opening and closing the shutter blades; and a central processing unit to control the rotation of a linear pulse motor. The linear pulse motor includes a circular rotor mounted around the cylindrical portion and a plurality of stators placed around the rotor, each stator has two armatures mounted on an inner circumference thereof with a predetermined distance from the rotor. The rotor has a plurality of projections on the outer circumference thereof projected radially outwardly at regular intervals. A permanent magnet is provided between the stators.
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Choi Deog-ho
Lee Seon-Ho
Seo Jae-kyeong
Gellner Michael L.
Samsung Aerospace Industries Ltd.
Tuccillo Nicholas J.
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