Optical measurement instruments are a group of devices that utilize the properties of light to perform non-contact precision measurement of dimensions, shapes, surface conditions, and optical characteristics. This includes laser measuring devices, optical coordinate measuring machines, surface roughness meters, optical microscopes, interferometers, and spectrometers. In manufacturing environments, these instruments enable high-precision and rapid measurements for quality control, inspection processes, and research and development, allowing microscopic measurements while avoiding damage to objects through contact. They are widely utilized in manufacturing industries including electronics, precision machinery, optical components, and semiconductors.