a method of inspecting a glazing for faults involves illuminating the glazing with light having a first wavelength to produce a bright - field image , and illuminating the glazing with light having a second wavelength to produce a dark - field image . the bright - field image and dark - field image are captured using a single image capture device . the bright - field and dark - field images may be focussed onto the image capture device by a common lens . in addition , a shadowgraph image may be recorded simultaneously . the inspection method provides an improved fault detection system for glazings , such as automotive glazings .