An automatic through-hole inspection system by analyzing laser diffraction pattern

This paper describes a system for inspecting the inner surface of through-holes in a circuit board simultaneously and automatically. The system analyzes a diffraction pattern which appears in the shadow region around the through-holes by projecting a laser illumination on a circuit board. The diffra...

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Bibliographische Detailangaben

Hauptverfasser:	Yoshino, Kazuyoshi, Miwa, Motoatsu, Kanamaru, Akihiro, Kanai, Norikane
Format:	Tagungsbericht
Sprache:	eng
Schlagworte:	Diffraction Image processing Laser Laser beams Lasers Lighting Pixel Printed circuits Through-hole inspection X-ray diffraction
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