62 citations · 317 across the 21 of their papers we have counts for
22 papers
Error-Free Demodulation of Pixelated Interferograms: Updated review and circumstantial evidence of plagiarism by 4D Technology Corporation
Manuel Servin
This paper examines the historical development that led to error-free phase demodulation of pixelated spatial-carrier interferograms between 2004 and 2010. It also evaluates eviden…
Wavelength-stepping algorithm for testing thickness, front and back surfaces of optical plates with high signal-to-noise ratio
Manuel Servin, Gonzalo Paez, Moises Padilla +1
We propose a least-squares phase-stepping algorithm (LS-PSA) consisting of only 14 steps for high-quality optical plate testing. Optical plate testing produces an infinite number o…
Wavefront reconstruction of discontinuous phase objects from optical deflectometry
Ricardo Legarda-Saenz, Jorge L. Flores, Manuel Servin +1
One of the challenges in phase measuring deflectometry is to retrieve the wavefront from objects that present discontinuities or non-differentiable gradient fields. Here, we propos…
High-precision temporal interferometry from nonlinearly-spaced phase-shifted interferograms through spatial-filtering
Manuel Servin, Moises Padilla, Guillermo Garnica +1
We present a high-precision temporal-spatial phase-demodulation algorithm for phase-shifting interferometry (PSI) affected by random/systematic phase-stepping errors. Laser interfe…
Fourier spectra for nonuniform phase-shifting algorithms based on principal component analysis
Manuel Servin, Moises Padilla, Guillermo Garnica +1
We develop an error-free, nonuniform phase-stepping algorithm (nPSA) based on principal component analysis (PCA). PCA-based algorithms typically give phase-demodulation errors when…
Design of non-uniformly spaced phase-stepped algorithms using their frequency transfer function
Manuel Servin, Moises Padilla, Guillermo Garnica +1
Here we show how to design phase-shifting algorithms (PSAs) for nonuniform phase-shifted fringe patterns using their frequency transfer function (FTF). Assuming that the nonuniform…