Automatic control device for controlling the iris diaphragm in a

Details Automatic control device for controlling the iris diaphragm in a Automatic control device for controlling the iris diaphragm in a

1981-02-26

1983-03-29

Corbin, John K.

354 44, G05D 2502

Patent

active

043781462

ABSTRACT:
An automatic control device for controlling the iris diaphragm in an optical system having lens groups therein, comprising an outer casing adapted to be detachably secured to the optical system surrounding the optical system and an iris diaphragm drive mechanism mounted in the outer casing. The iris drive mechanism includes a drive source in the form of an annular rotary electric motor provided by an annular rotor and an annular stator opposing the annular rotor, said rotor and stator being disposed in the optical axis of the optical system. The electric motor responses to a signal from photometer means of the optical system and rotates the rotor to thereby operate the iris diaphragm.

REFERENCES:
patent: 3654845 (1972-04-01), Fahlenberg et al.
patent: 3687042 (1972-08-01), Mizui et al.
patent: 4100558 (1978-07-01), Koike et al.
patent: 4113359 (1978-09-01), Koike et al.

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