Choosing LED lighting and controllers for machine vision systems

摘要

Before specifying any illumination system, developers of machine vision systems must carefully consider their choice of which type of lighting must be used. If incorrectly chosen, the lighting source may result in captured images that lack contrast and cannot be processed easily by machine vision software. Because individual parts vary greatly in their spectral properties, features, and shape, it is critical to understand how the wavelength of radiation that is used to radiate the object will be reflected, transmitted and absorbed by the object being imaged. This will depend on the wavelength of light that is used to illuminate the object, the geometric distribution of the incident light source and thus the configuration of the light source.