Brief description：A white light interferometer is an optical instrument that uses the principle of interference to measure the difference in optical path and thereby determine related physical quantities. Any change in the optical path difference between two coherent beams can very sensitively cause the interference fringes to move, and the change in the optical path of one coherent beam is caused by changes in the geometric path it travels or the refractive index of the medium. So by observing the movement of the interference fringes, tiny changes in geometric length or refractive index can be measured, allowing other related physical quantities to be determined. The measurement accuracy depends on
Industry Applications：Characterization of material surface morphology and roughness measurement.
