There is increasing interest in non-contacting sensors to perform dynamic, in-process gauging to achieve closed-loop adaptive control of manufacturing processes. After a brief review of current instrumentation, a detailed description will be given of those engineering principles and design features which must be considered to achieve stable, reliable measurements with an optical sensor using a scanning laser beam. Several applications will also be discussed.
Carl A. Zanoni,
"Dimensional Gauging Using A Scanning Laser Beam", Proc. SPIE 0126, Clever Optics: Innovative Applications of Optics, (21 November 1977); doi: 10.1117/12.955896; https://doi.org/10.1117/12.955896