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  Coating & Layer Thickness Analysis with Step-Scan FT-IR PAS
 Coating & Layer Thickness Analysis with Step-Scan FT-IR PAS
 A simplified phase difference model for the thickness measurement of organic coatings and laminates using photoacoustic spectroscopy (PAS) is discussed within this PDF. Step-scan phase modulation FT-IR PAS spectroscopy is utilized, which is highly effective at measuring thicknesses of layers from tens of microns to tenths of a micron, even for optically challenging samples.

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