Optical fringes method to measure the keyhole geometry Available to Purchase

Measuring with improved accuracy laser and process parameters may lead to an effective adaptive control system. For example measuring and controlling the keyhole geometry can ensure uniformity and reproducibility of laser keyhole welding procedures. We discuss and present some experimental results using laser triangulation techniques to measure a simulated keyhole. We propose two solutions. One is an extension of Steen’s Acoustic Mirror beam Monitoring (AMBM) replacing the piezo transducer with an ESPI system. The second is an innovative optical fringes detection system. We suggest also combining and integrating the proposed methods in order to develop an adaptive control system for laser material processing.