Fourier Transform Infrared Microscopy, also known as Infrared (IR) Microscopy and Micro-FTIR Spectroscopy. Basically, it is a powerful analytical tool which combines visual microscopy and FTIR, and it is primarily used in the identification and analysis of the smallest samples and surfaces, down to 5 µm in size.   It offers the advantage of optical microscopy for visualization and  localization of small samples (i.e. particles, fibers, contaminants, inclusions, surfaces) while providing reliable chemical/material identification