Method for optically measuring a distance

Details Method for optically measuring a distance Method for optically measuring a distance

1976-10-21

1978-07-25

Buczinski, S. C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

250560, 356 4, G01C 300, G01C 308

Patent

active

041025717

ABSTRACT:
A beam of light from a light source is reflected by a polyhedron mirror which is continuously rotating around its axis. The reflected beam sweeps on an object and passes a predetermined point of the object surface. A dispersed light from the point is formed into a beam through a set of slits and reaches into a light detector.
The polyhedron mirror has a plurality of mirror surfaces each of which is spaced at an independent distance from the rotary axis thereof.
The distance between the predetermined point of the object and the beam line from the light source is computed by using the distances of the mirror surfaces from the rotary axis of the polyhedron mirror and the inclination angles of the mirror surfaces from the beam line, at which angles the reflected beam hits the predetermined point.

REFERENCES:
patent: 3217592 (1965-11-01), Braun et al.
patent: 3554646 (1971-01-01), Carlson
patent: 3565531 (1971-02-01), Kane et al.
patent: 3671726 (1972-06-01), Kerr
patent: 3692414 (1972-09-01), Hosterman et al.
patent: 3802774 (1974-04-01), Eschler et al.
patent: 3856399 (1974-12-01), Hosoe et al.

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