Automatic focusing camera

Details Automatic focusing camera Automatic focusing camera

1989-11-30

1990-09-25

Hix, L. T.

G03B 1300

Patent

active

049596780

ABSTRACT:
An automatic focusing camera includes a shutter; a range finding circuit for measuring the distances to a plurality of objects and for providing time base electrical signals corresponding thereto, the circuit including n parallel luminous elements which transmit light to the objects; a range and element position data arithmetic circuit for producing range data to the objects and element position data of active ones of the n elements, in response to the time base electrical signals; an object speed arithmetic circuit for producing time base speed signals corresponding to the object speeds, in response to the range data and the element position data; a shutter control circuit for controlling operation of the shutter in accordance with the object speeds at such time; object speed processors for supplying output signals corresponding to optimum exposure times and stop values of respective objects in response to the time base speed signals and luminances of the objects; and object speed rank order decision circuit for comparing the output signals from the object speed processors and for determining the order of ranking of the object speeds relative to each other and an object speed data organizing circuit for controlling the shutter control circuit in response to the object speed rank order decision circuit so as to control the shutter control circuit means in accordance with the highest speed object.

REFERENCES:
patent: 4816856 (1989-03-01), Hamada et al.
patent: 4825239 (1989-04-01), Suda et al.
patent: 4827303 (1989-05-01), Tsuboi

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