Photoreceptor assembly for automatic focusing system

Details Photoreceptor assembly for automatic focusing system Photoreceptor assembly for automatic focusing system

1975-01-02

1976-10-05

Peters, Jr., Joseph F.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

33125A, 250204, 250215, 250234, 250578, 356 4, G03B 310, G01C 308

Patent

active

039848469

ABSTRACT:
A photographic apparatus having a lens movable along an axis for automatically focusing an object to be photographed is disclosed. The apparatus includes a rotatable sleeve controlled by electrical signals produced by photoreceptor means adapted to receive light emitted by the apparatus and reflected from the object. The sleeve effectuates the movement of the lens along an axis to bring the object into focus. The apparatus further includes assembly means, carrying the photoreceptor means, pivotably secured to the sleeve for adjusting the light received by the photoreceptor means by an amount corresponding to the rotation of the sleeve, thereby changing the electrical signals to maintain the object in focus.

REFERENCES:
patent: 3442193 (1969-05-01), Pagel
patent: 3736057 (1973-05-01), Harvey
patent: 3836919 (1974-09-01), Matsumoto et al.

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