title: Temporal phase-unwrapping of static surfaces with 2-sensitivity fringe-patterns.
abstract: Here we describe a 2-step temporal phase unwrapping formula that uses 2-sensitivity demodulated phases for measuring static surfaces. The first phase demodulation has at most 1-wavelength sensitivity and the second one is G-times (G>>1.0) more sensitive. Measuring static surfaces with 2-sensitivity fringe patterns is well known and recent published methods combine 2-sensitivities measurements mostly by triangulation. Two important applications for our 2-step unwrapping algorithm is profilometry and synthetic aperture radar (SAR) interferometry. In these two applications the object or surface being analyzed is static and highly discontinuous; so temporal unwrapping is the best strategy to follow. Phase-demodulation in profilometry and SAR interferometry is very similar because both share similar mathematical models.
authors.forename: Manuel
authors.initials: M
authors.lastname: Servin
authors.forename: J M
authors.initials: JM
authors.lastname: Padilla
authors.forename: Adonai
authors.initials: A
authors.lastname: Gonzalez
authors.forename: Guillermo
authors.initials: G
authors.lastname: Garnica