Range finder for still or moving picture cameras

Details Range finder for still or moving picture cameras Range finder for still or moving picture cameras

1979-11-29

1981-12-08

Buczinski, S. C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

354 25, G01C 300, G01C 500, G03B 708

Patent

active

043044875

ABSTRACT:
To measure the distance to a selected object, the range finder transmits infrared light in a beam having a straight limiting edge on one side. The object reflects light back from the illuminated region and a lens receives part of the light and creates an image of the illuminated region including the straight limiting edge on a plane inclined at an angle to the optical axis of the lens. A detector, including a photoelectric transducer part of which is masked by a mask having a straight edge, is moved along the plane until the edge of the mask and the edge of the image are aligned as closely as possible. The position of the detector when this alignment takes place is indicative of the distance of the object from the range finder.

REFERENCES:
patent: 3224319 (1965-12-01), Robert et al.
patent: 3442193 (1969-05-01), Pagel
patent: 3558894 (1971-01-01), Odone et al.
patent: 3936187 (1976-02-01), Momose

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