RT Journal Article
T1 Design of phase-shifting algorithms by fine-tuning spectral shaping
A1 Quiroga Mellado, Juan Antonio
A1 Servín Guirado, Manuel
A1 Estrada, Julio César
A1 González, Christhian Adonai
AB To estimate the modulating wavefront of an interferogram in Phase Shifting Interferometry (PSI) one frequently uses a Phase Shifting Algorithm (PSA). All PSAs take as input N phase-shifted interferometric measures, and give an estimation of their modulating phase. The first and best known PSA designed explicitly to reduce a systematic error source (detuning) was the 5-steps, Schwider-Hariharan (SH-PSA) PSA. Since then, dozens of PSAs have been published, designed to reduce specific data error sources on the demodulated phase. In Electrical Engineering the Frequency Transfer Function (FTF) of their linear filters is their standard design tool. Recently the FTF is also being used to design PSAs. In this paper we propose a technique for designing PSAs by fine-tuning the few spectral zeroes of a PSA to approximate a template FTF spectrum. The PSA's spectral zeroes are moved (tuned) while gauging the plot changes on the resulting FTF's magnitude.
PB The Optical Society Of America
SN 1094-4087
YR 2011
FD 2011-05-23
LK https://hdl.handle.net/20.500.14352/43917
UL https://hdl.handle.net/20.500.14352/43917
LA spa
NO ©2011 The Optical Society of America
DS Docta Complutense
RD 9 abr 2025