Optical tracing system for measuring elevation of a reference bo

Details Optical tracing system for measuring elevation of a reference bo Optical tracing system for measuring elevation of a reference bo

1997-01-08

1999-01-26

Allen, Stephone

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

250202, 356376, G01B 1130

Patent

active

058641459

ABSTRACT:
The invention provides an optical tracing system for measuring elevation of a reference body above a reference surface, comprising a laser transmitter radiating a light beam in a downward direction; an optical unit for imaging the radiation reflected from said body and said surface on a detector; filtering means for separating light originating from said laser from background illumination, and signal processing means for identifying said reference body and for measuring the elevation thereof from said surface.

REFERENCES:
patent: 4796998 (1989-01-01), Soma et al.
patent: 4878754 (1989-11-01), Homma et al.
patent: 5275327 (1994-01-01), Watkins et al.
patent: 5486926 (1996-01-01), Hausler
patent: 5686994 (1997-11-01), Tokura

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