To detect defects on steel strips, good lighting contrast has always been essential. Until recently, mills have had to choose between Bright Field or Dark Field illumination. LED technology for stroboscopic inspection now allows inspectors to gain the same technological advantages that previously were only available using cameras. The ability to synchronise multiple lights has led to the development of algorithms that, when paired with stroboscopic inspection light positioning, provides optimum visual inspection at far less cost than camera-based systems. Cross light inspection affords metal producers better inspection capability. Operators have greater insight to the quality of the steel they are producing to increase yield and reduce customer rejections.
Read the white paper at https://unilux.com/cross-light-inspection-article