Auto-focus camera having rangefinder system

Details Auto-focus camera having rangefinder system Auto-focus camera having rangefinder system

1978-11-13

1980-07-15

Gellner, Michael L.

G03B 310

Patent

active

042125235

ABSTRACT:
An auto-focus camera including an automatic rangefinder device for generating a distance signal indicative of the distance between the camera and a target object to be photographed, a timer circuit for generating an output signal a predetermined time after a power switch is closed, to place a lens drive mechanism in an operative condition for repositioning an objective lens assembly of the camera in search of the true focus setting, and a lens arresting circuit including electromagnetic units. Either of the electromagnetic units is operable to arrest the objective lens assembly at a corresponding focal position when energized by the distance signal. The automatic rangefinder device can measure the distance from the camera to the target object independent of the release of the lens drive mechanism.

REFERENCES:
patent: 4065778 (1977-12-01), Harvey

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