The spectrum of the intensity profile of multiple-beam Fizeau interferograms is presented. Knowledge of this spectrum provides valuable information about the characteristics of Fizeau interferograms, allowing one to calculate the phase error when the Fizeau profile is evaluated by means of two-beam phase-stepping algorithms, as is usual for low-reflectivity coefficients.
© 1996 Optical Society of America
B. V. Dorrío, J. Blanco-García, C. López, A. F. Doval, R. Soto, J. L. Fernández, and M. Pérez-Amor, "Phase error calculation in a Fizeau interferometer by Fourier expansion of the intensity profile," Appl. Opt. 35, 61-64 (1996)