2026-06-27T22:46:16Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/439122023-08-25T14:57:50Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Quiroga Mellado, Juan Antonio
author
Vargas Balbuena, Javier
author
Sánchez Sorzano, Carlos Óscar
author
Estrada, Julio César
author
Carazo García, José María
2023-06-20T03:34:19Z
2023-06-20T03:34:19Z
2011-09-01
0146-9592
10.1364/OL.36.003485
https://hdl.handle.net/20.500.14352/43912
http://dx.doi.org/10.1364/OL.36.003485
http://www.opticsinfobase.org/
A two-step phase-shifting method, that can demodulate open-and closed-fringed patterns without local sign ambiguity is presented. The proposed method only requires a constant phase-shift between the two interferograms. This phase-shift does not need to be known and can take any value inside the range (0, 2 π), excluding the singular case where it corresponds to π. The proposed method is based on determining first the fringe direction map by a regularized optical flow algorithm. After that, we apply the spiral phase transform (SPT) to one of the fringe patterns and we determine its quadrature signal using the previously determined direction. The proposed technique has been applied to simulated and experimental interferograms obtaining satisfactory results. A complete MATLAB software package is provided in [http://goo.gl/Snnz7].
eng
Two-step interferometry by a regularized optical flow algorithm
journal article
URL
https://docta.ucm.es/bitstreams/d76d7bf5-6034-4a1e-a288-85d4b4741a46/download
File
MD5
3fb4eb3afa8f14984688578e32242d6a
555351
application/pdf
QuirogaJA07.pdf