Technical White Paper

Choosing the right illumination for the application is critical for acquiring the high quality images needed for calculating 3D data. We compare the imaging results of a directional coaxial brightfield illumination with a Corona tube light in terms of color image quality and height map for different samples. It could be shown that for material that exhibit considerable amounts of subsurface scattering, coaxial lighting geometry benefits the 3D measurement using 3DPIXA.

Inspecting wire bonding processes inline is currently one of the most challenging tasks in machine vision. Traditional inspection is performed on 2D images, color or grayscale, and consists for instance of wire tracing, Bent and broken wire detection, Wire solder spot / wedge analysis, Wire attendance check. 2D inspection is insufficient for some tasks and 3D information is required.

The procedure for measuring camera repeatability is described and illustrated by example of a 15µm 3DPIXA camera module. It is elaborated how to distinguish repeatability of the camera, and repeatability of the entire scanning system. Practical information is given regarding how to analyze scan data and how to account for measurement bias.

The light factor is often neglected when discussing high performance image processing systems. Every brilliant image requires two things: an excellent camera and excellent lighting. The following article offers good advice for the selection of an optimal lighting solution and important practical tips.