Optical characterization is a scientific approach employing the interaction of light with matter to determine the physical, chemical, and structural properties of materials and systems. This field encompasses diverse techniques analyzing phenomena such as absorption, emission, scattering, and reflection, or utilizing optical imaging. It investigates aspects ranging from elemental composition and molecular structure to crystal orientation and material morphology, often providing non-destructive insights. Its significance lies in enabling the identification, analysis, and understanding of materials across various scientific, engineering, and industrial applications.