Alcance
                            ISO 18251-1:2017 describes the main components, and their characteristics, constituting an infrared (IR) imaging system and related equipment used in non-destructive testing (NDT). It also aims to assist the user in the selection of an appropriate system for a particular measurement task.The following items are specified:-      objective lens;-      detector;-      image processor;-      display;-      thermal stimulation source;-      accessories.