We employ the Fourier-transform graphic representation of a set of antisymmetrical and symmetrical sampling reference harmonics to obtain new symmetrical phase-shifting algorithms tailored to specific characteristics. As an example, a new detuning-insensitive seven-point algorithm, with a third signal harmonic insensitivity and which is detuning insensitive at this frequency, is derived.
© 2000 Optical Society of America
(050.5080) Diffraction and gratings : Phase shift
(070.2590) Fourier optics and signal processing : ABCD transforms
(070.6020) Fourier optics and signal processing : Continuous optical signal processing
Daniel Malacara-Doblado, Benito V. Dorrío, and Daniel Malacara-Hernández, "Graphic tool to produce tailored symmetrical phase-shifting algorithms," Opt. Lett. 25, 64-66 (2000)