Microspectroscopy


Figure 10: Diagram of the combined O-PTIR plus Raman instrumental setup.


Figure 11: Optical image showing a defect on the surface of a recording head. Simultaneously collected O-PTIR and Raman spectra collected from the defect site were searched using KnowItAll against their commercial digital libraries. The best matches in each case (shown in red) were polyether materials.


34 www.microscopy-today.com • 2020 May


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