RT Journal Article
T1 Temporal evaluation of fringe patterns with spatial carrier with an improved asynchronous phase demodulation algorithm
A1 Quiroga Mellado, Juan Antonio
A1 Gómez Pedrero, José Antonio
A1 Servín Guirado, Manuel
AB A method for temporal evaluation of fringe patterns with a spatial carrier is presented. The proposed technique consists in the recording of the temporal irradiance fluctuations obtained when a linear variation of the set-up sensitivity is introduced. In this way, the use of a spatial carrier introduces a linear temporal carrier frequency. This allows the use of fast and low time consuming temporal asynchronous demodulation algorithms, similar to those employed in spatial phase shifting techniques. An existing five-step algorithm has been corrected for asynchronous demodulation. It is shown that it is possible to fix the sensitivity variation in such a way that the algorithm presents optimum behaviour against noise and nonlinearities presented by the temporal irradiance signal. Finally, the technique has been applied to measure the shape of an object, using a fringe projection set-up. ©2004 Taylor & Francis LTD.
PB Taylor and Francis Ltd.
SN 0950-0340
YR 2004
FD 2004-01-10
LK https://hdl.handle.net/20.500.14352/50818
UL https://hdl.handle.net/20.500.14352/50818
NO © 2004 Taylor & Francis LTD.
DS Docta Complutense
RD 11 abr 2025