Optical metrology is a branch of technology that utilizes light or other electromagnetic radiation to measure the physical characteristics of objects or phenomena. This area of research includes various techniques and methods for obtaining precise measurements in fields such as engineering, manufacturing, and science. Optical metrology can be used for tasks such as determining the dimensions of objects, analyzing surface quality, testing the properties of materials, and monitoring processes in real-time. This field is important for ensuring the accuracy and quality of products, as well as advancing scientific knowledge through precise measurement techniques.