Diaphragm driving mechanism

Details Diaphragm driving mechanism Diaphragm driving mechanism

1987-12-03

1988-10-18

Corbin, John K.

354230, 354274, G02B 2602, G02B 714

Patent

active

047782552

ABSTRACT:
A diaphragm driving mechanism which includes diaphragm blades, a diaphragm drive member for driving motion of the diaphragm blades, a support member for pivotally supporting the diaphragm blades, a magnet member fixedly secured to the diaphragm drive member or the support member and movable in a direction parallel with an optical axis, coils constituting an electromagnetic induction mechanism together with the magnet member, and a bias member imparting a force parallel to the optical axis to the magnetic member to cause the magnetic member to be displaced relative to the coils.

REFERENCES:
patent: 4284339 (1981-08-01), Borowski et al.
patent: 4327977 (1982-05-01), Sharp
patent: 4378146 (1983-03-01), Suzuki et al.

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