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25 July 1979 Computer-Controlled Laser Beams in Object Dimension Measurements
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Proceedings Volume 0164, 4th European Electro-Optics Conf; (1979)
Event: Fourth European Electro-Optics Conference, 1978, Utrecht, Netherlands
This paper describes some general features of a computer-controlled laser system for noncontact measurements of dimensions of objects. The laser beams are scanned over the object and a system of detectors mounted behind the object detects whether the beams are shadowed by the object or not. The detector signals are converted to digital values and transferred to a minicomputer, where they are processed. This may require special software to allow the dimensional data to be presented in real time. An experimental system with a HeNe laser and controlled by an HP 21MX minicomputer has been built and tested. At a rate of 100 measurements per second the systematic error is in the order of 1 mm for absolute measurements and 0.1 mm for relative measurements. The imprecision is about 0.1 mm for both cases.
© (1979) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. Johansson, C. O. Falt, and S. T. Eng "Computer-Controlled Laser Beams in Object Dimension Measurements", Proc. SPIE 0164, 4th European Electro-Optics Conf, (25 July 1979);


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