Infrared microscopes are specialized instruments that utilize infrared radiation to non-destructively detect and analyze foreign materials and impurities within materials. Used in quality control in manufacturing industries for detecting metal fragments in plastic products, foreign materials in rubber products, internal defects in electronic components, and impurity analysis in pharmaceuticals and chemical products. They identify internal structures and compositional differences invisible to visible light through infrared spectral analysis, with FT-IR (Fourier Transform Infrared Spectroscopy) equipped models being mainstream. Specialized in identifying organic foreign materials difficult to detect with optical microscopes or X-ray inspection equipment, enabling detailed component analysis without damaging the chemical properties of materials.