62 citations · 297 across the 13 of their papers we have counts for
14 papers
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…
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…
Profilometry with digital fringe-projection at the spatial and temporal Nyquist frequencies
Moises Padilla, Manuel Servin, Guillermo Garnica
A phase-demodulation method for digital fringe-projection profilometry using the spatial and temporal Nyquist frequencies is presented. It allows us to digitize tridimensional surf…
General theory for super-sensitive dual-wavelength phase metrology: error-free unwrapping and signal-to-noise ratio
Manuel Servin, Moises Padilla, Guillermo Garnica
From 1971 to 2012 dual-wavelength optical-metrology used only the demodulated low-sensitivity phase-difference of two close-sensitive fringes. Dual-wavelength phase-metrology that…
Super-resolution far-ultraviolet equivalent-wavelength interferometry combining the phase of several visible-wavelength interferograms
Manuel Servin, Moises Padilla, Guillermo Garnica
A far-ultraviolet (FUV) equivalent-wavelength super-resolution interferometric technique is proposed. This FUV equivalent-wavelength interferometric method combines four demodulate…
Extended depth-range profilometry using the phase-difference and phase-sum of two close-sensitivity projected fringes
Manuel Servin, Moises Padilla, Guillermo Garnica
We propose a high signal-to-noise extended depth-range three-dimensional (3D) profilometer projecting two linear-fringes with close phase-sensitivity. We use temporal phase-shiftin…
Temporal-multiplexing interferometry applied to co-phased profilometry
Manuel Servin, Moises Padilla, Guillermo Garnica
Fringe-projection profilometry with 1 camera and 1 fringe-projector is a well-known and widely used technique in optical metrology. Spatial-frequency multiplexing interferometry wi…
Fourier analysis of RGB fringe-projection profilometry and robust phase-demodulation methods against crosstalk distortion
Moises Padilla, Manuel Servin, Guillermo Garnica
In this paper we apply the frequency transfer function (FTF) formalism to analyze the red, green and blue (RGB) phase-shifting fringe-projection profilometry technique. The phase-s…
Synthesis of multi-wavelength temporal phase-shifting algorithms optimized for high signal-to-noise ratio and high detuning robustness using the frequency transfer function
Manuel Servin, Moises Padilla, Guillermo Garnica
Synthesis of single-wavelength temporal phase-shifting algorithms (PSA) for interferometry is well-known and firmly based on the frequency transfer function (FTF) paradigm. Here we…
Fourier phase-demodulation applied to strip-light 360-degrees profilometry of 3D solids; theoretical principles
Manuel Servin, Moises Padilla, Guillermo Garnica
360-degrees digitalization of three-dimensional (3D) solids using a projected light-strip is a well established technique. These profilometers project a light-strip over the solid…
360-degree fringe-projection profilometry of discontinuous solids with 2 co-phased projectors and 1-camera
Manuel Servin, Guillermo Garnica, J. M. Padilla
We describe a theoretical analysis and experimental set-up of a co-phased 360-degree fringe-projection profilometer. This 360-degree profilometer is built using 2-projections and 1…
Co-Phased 360-Degree Profilometry of Discontinuous Solids with 2-Projectors and 1-Camera
Manuel Servin, Guillermo Garnica, J. M. Padilla
Here we describe a co-phased 360-degree fringe-projection profilometer which uses 2-projectors and 1-camera and can digitize discontinuous solids with diffuse light surface. This i…