Single image camera calibration in close range photogrammetry for solder joint analysis

Heinemann, David; Knabner, Steffen; Baumgarten, Daniel GND

Printed Circuit Boards (PCB) play an important role in the manufacturing of electronic devices. To ensure a correct function of the PCBs a certain amount of solder paste is needed during the placement of components. The aim of the current research is to develop an real-time, closed-loop solution for the analysis of the printing process where solder is printed onto PCBs. Close range photogrammetry allows for determination of the solder volume and a subsequent correction if necessary. Photogrammetry is an image based method for three dimensional reconstruction from two dimensional image data of an object. A precise camera calibration is indispensable for an accurate reconstruction. In our certain application it is not possible to use calibration methods with two dimensional calibration targets. Therefore a special calibration target was developed and manufactured, which allows for single image camera calibration.

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Heinemann, David / Knabner, Steffen / Baumgarten, Daniel: Single image camera calibration in close range photogrammetry for solder joint analysis. Ilmenau 2012. ilmedia.

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