Layer Thickness Measurement

For multi-layer coatings on metal and plastic or multi-layer components (such as hoses), precise adherence to individual layer thicknesses is an important quality parameter. With regard to resource conservation, this quality control should take place as early as possible in the process.

Various optical measurement techniques are available for this measurement task – depending on the specific requirements and always contactless and non-destructive:

• Interferometric sensors
• Chromatic sensors
• Optical coherence tomography (OCT)
• Terahertz TDS
• Terahertz FMCW

Due to the wide variety of sensors available, we select the sensor best suited to the respective application. Important aspects for sensor selection include layer thickness range, number of layers, color of the layers, material of the layers and the substrate.