QUASIHETERODYNE METHOD OF INTERFERENCE MEASUREMENTS
V. I. Guzhov, S. P. Il’yinykh, I. A. Sazhin, E. N. Denezhkin, E. S. Kabak, D. S. Khaidukov
Novosibirsk State Technical University, pr. Karla Marksa 20, Novosibirsk, 630073 Russia
Keywords: интерферометрия, пошаговый фазовый сдвиг, interferometry, phase-shifting interferometry
Abstract
A method for measuring a phase difference between two interfering wavefronts on the basis of analyzing the trajectories that are formed by the intensities of pairs of points in a series of interferograms with different phase shifts is proposed. This method does not require a priori knowledge of the actual values of phase shifts.
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