Computer-Controlled Laser Beams In Object Dimension Measurements

J. Johansson; C. O. Falt; S. T. Eng

doi:10.1117/12.965514

25 July 1979 Computer-Controlled Laser Beams in Object Dimension Measurements

J. Johansson, C. O. Falt, S. T. Eng

Proceedings Volume 0164, 4th European Electro-Optics Conf; (1979) https://doi.org/10.1117/12.965514
Event: Fourth European Electro-Optics Conference, 1978, Utrecht, Netherlands

Abstract

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.

Citation Download Citation

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); https://doi.org/10.1117/12.965514

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