Distance measuring device

Details Distance measuring device Distance measuring device

1974-02-19

1976-02-03

Wilbur, Maynard R.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 4, 354 25, 250211K, G01C 300, G03B 708

Patent

active

039361870

ABSTRACT:
A distance measuring device comprising a flood-light projecting means having a flashing device adapted to direct a flashlight to an object to be photographed, a light receiving means incorporating a light slide rheostat disposed at a predetermined distance from said projecting means and a lens adapted to allow light rays reflected from said object to impinge, in the form of a beam, on the light receiving surface of said rheostat, a converting means for converting the variation of the resistance amount of said rheostat into the variation of voltage and an indicating means for indicating said voltage variation, particularly useful in photographic cameras. Also, an automatic focusing device having the same constructional features as the aforesaid distance measuring device, except that it has an objective lens adjusting means operated by said voltage variation instead of said indicating means.

REFERENCES:
patent: 3222531 (1965-12-01), Morrison
patent: 3443502 (1969-05-01), Harvey
patent: 3652160 (1972-03-01), Odone et al.
patent: 3723003 (1973-03-01), Vockenhuber et al.

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