For making precise measurements for beams of light of such factors as length, surface irregularities, and index of refraction.
Information derived from fringe measurements is used for precise
wavelength determinations, measurement of very small distances and
thicknesses, the study of spectrum lines, and determination of
refractive indices of transparent materials
Optical Interferometer Operation Manual, Lab Instructor Guide and Student Workbook. Optical Interferometer for Educational Vocational, Didactic Technical Training Equipment Labs.