Active electro-optical distance detection methods and devices

Details Active electro-optical distance detection methods and devices Active electro-optical distance detection methods and devices

1982-06-30

1985-04-16

Buczinski, S. C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 1, G01C 308, G01C 310

Patent

active

045112487

ABSTRACT:
Active distance detection is effected by (1) directing light through a lens to an object, from an emitter zone located at or proximate the lens focal plane, (2) sensing the amplitude of light reflected back through the lens from the object at two or more detection zones that are located respectively at different distances from the emitter zone and that are generally coplanar with the emitter zone in a plane substantially normal to the optical axis of the lens, and (3) comparing the amplitudes of object-reflected light at the detection zones in a manner determinative of the unique distance-from-emitter-zone versus reflected-light-amplitude curve of the object's distance.

REFERENCES:
patent: 3455243 (1969-07-01), Martin
patent: 3617128 (1971-11-01), Harvey
patent: 3679307 (1972-07-01), Zoot et al.
patent: 3792928 (1974-02-01), Poilleux

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