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이준재(Joon Jae Lee),윤형조(Hyeongjo Yoon) 대한전자공학회 2018 대한전자공학회 학술대회 Vol.2018 No.6
In this paper, we propose a method to measure the thickness of the conformal coating sprayed on the PCB substrate in real time. The principle of measurement is to scan a linear laser beam and acquire each energy emitted from the surface of the substrate and the surface of coating with a camera. The thickness is then calculated by triangulation method. Therefore, the proposed system consists of a linear laser beam generating optical system, an image receiving optical system, and a signal processing system for processing the image signal to calculate the thickness.