Title: Optimal illuminator design for automatic optical inspection systems

Authors: Shenglin Lu, Xianmin Zhang, Yongcong Kuang

Addresses: School of Mechanical Engineering, Dongguan University of Technology, Dongguan, Guangdong 523808, China. ' School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China. ' School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China

Abstract: This paper presents an illuminator for the Automatic Optical Inspection (AOI) system. First, the structure of the designed illuminator is introduced. The structure consists of three Light Emitting Diode (LED) arrays, which have different colour and radiation angles. Second, the radiance model of the illuminator and the irradiance model of the solder joint are developed. Third, the dimensions of the illuminator are optimised based on the irradiance model. Finally, the inspection method is implemented and tested, and experimental results verify the validity of the design.

Keywords: AOI; automatic optical inspection; illuminator design; inspection; solder joints; machine vision; LED arrays; light emitting diodes; illuminators; optimal design; modelling.

DOI: 10.1504/IJCAT.2010.032199

International Journal of Computer Applications in Technology, 2010 Vol.37 No.2, pp.101 - 108

Published online: 16 Mar 2010 *

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