Datalogic PowerScan PD8590-DPM User Manual

Contents

3-8 POWERSCAN D8590 User’s ManualIllumination SystemDome IlluminationDome illumination provides diffused, uniform light. The large, solid angle of illuminationsupports imaging of shiny flat surfaces or curved surfaces. This zone is useful on specularand non-specular surfaces, ideal for de-emphasizing surface texture and elevation(curves). The dome provides the widest area of coverage at close working distances. It isimportant to note that for marks that are a large percentage of the diameter of a curvedsurface, closer distances will provide the best performance. In addition to illuminatingmarks on curved surfaces, dome illumination also provides diffuse, even bright field illumination,which will provide thorough coverage on a wide variety of direct part marks.Dome IlluminationBlue Dome vs. Red Dome IlluminationThe POWERSCAN D8590 features two colors of dome illumination to add another dimensionof decode optimization for direct part marks. Using the opposite light spectrum as a part’ssurface color will make the part feature appear darker. Using the same light spectrum willmake the part feature appear lighter. The example below shows a green part surface witha laser-etched Data Matrix.Blue Dome Illumination Red Dome Illumination