The inverse Fourier transform and flip-flop thin-film synthesis methods are compared and contrasted. Modifications to the flip-flop method are described which make it useful even for the solution of problems that require a large overall film thickness. The two methods were applied to a number of difficult problems. They yielded solutions that were different but of equivalent performance.
J. A. Dobrowolski, "Comparison of the Fourier transform and flip-flop thin-film synthesis methods," Appl. Opt. 25, 1966-1972 (1986)