| Systems are provided for contactless determining feature(s) of a layered coating. Such systems comprise determiner unit and measurement unit including coating scanner, vibration explorer and optical arrangement. Coating scanner includes ingress-protected transmitter to emit scanning radiation, and ingress-protected receiver to sense interaction radiation caused by interaction of scanning radiation with coating layer(s). Vibration explorer includes ingress-protected emitter to emit exploration radiation, and ingress-protected sensor to sense reflection radiation caused by reflection of exploration radiation on coating to detect a vibration of the coating depending on the reflection radiation. Optical arrangement guides scanning radiation and/or exploration radiation towards common radiation direction, and guides interaction radiation towards ingress-protected receiver and/or reflection radiation towards ingress-protected sensor. Determiner unit determines coating feature(s) depending on interaction radiation sensed by coating scanner and vibration detected by vibration explorer. Methods and computer programs performable in said systems are also provided. |
