Two zone infrared ranging system

Details Two zone infrared ranging system Two zone infrared ranging system

1983-01-31

1985-03-05

Adams, Russell E.

G03B 300

Patent

active

045027730

ABSTRACT:
An economical dual zone active rangefinding system for a photographic camera operates upon the principle of triangulation without lateral displacement of either the radiation source or detector to provide an output signal indicative of whether the subject in the scene to be photographed is located in a select distance range from the photographic camera.

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The British Journal of Photography, Nov. 2, 1979, "Canon AF 35M Towards Ultimate Automation", by L. A. Mannheim.

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