Exposure value display system for a camera

Details Exposure value display system for a camera Exposure value display system for a camera

1974-09-30

1976-07-20

Peters, Jr., Joseph F.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356226, 356227, G01J 144, G03B 1720

Patent

active

039710483

ABSTRACT:
In a single lens reflex camera equipped with a shutter time preselection-automatic exposure range and a diaphragm aperture preselection-automatic exposure range, the drive circuits of a light-sensor and a digit readout assembly arranged in the view finder are controlled in time-spaced relation to each other by timing signals. These signals in turn are controlled by a train of clock pulses to alternately bring the sensor and the digit readout assembly into sequential operation. In this manner, the light value as sensed by the sensor is not affected by any part of the light from the energized digit readout assembly.

REFERENCES:
patent: 3812503 (1974-05-01), Engelsmann et al.
patent: 3818495 (1974-06-01), Sagara et al.

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