Layer Thickness Measuring Instruments  Manufacturers, Traders, Suppliers

Safety glass, solar cells, flat screens and smartphone displays are made
up of several material layers. Measuring the exact thickness of
individual layers in production is a physically complex process –
a challenge for measurement technology. For quality inspection and
process control of manufactured transparent multi-layer materials,
Micro-Epsilon offers its confocal-chromatic displacement sensors with
multi-peak feature. The confocal-chromatic measuring principle allows
one-sided thickness measurement of these layers to micrometre
accuracies. The confocalDT series of sensors can measure up to 5 layers
by evaluating 6 measurement values on the boundary areas. To accurately
determine the thickness of each layer, the controller retrieves the
refractive index for each layer from the material database. Each
refractive index is corrected depending on the wavelength: three
refractive values are used for thickness calibration (beginning, end,
middle of the layer).