The combination of laser illumination and machine vision offers interesting possibilities for the automation of optical quality control. Machine Vision Lasers are used as structured lighting in many image processing systems. With this form of illumination, the spatial contours of both moving and stationary objects can be captured. The lasers are used to detect presence, defects, diameters, edges, gaps, and more, and to subsequently measure and align them. Depending on the type of objects to be inspected, line lasers, or various patterns (dot, grids, crosses, circles, etc.) and wavelengths (red, green, blue) can be used accordingly.