Articles

New modified phase locked loop method for fringe pattern demodulation

[+] Author Affiliations
Janusz Kozlowski, Giovanni Serra

Associazione Istituzione Libera Universita` Nuorese, Dip. Tecnologie Ottiche, Viale della Resistenza, 39, 08100 Nuoro, Italy

Opt. Eng. 36(7), 2025-2030 (Jul 01, 1997). doi:10.1117/1.601382
History: Received Oct. 3, 1996; Revised Feb. 14, 1997; Accepted Feb. 15, 1997
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Abstract

The modified phase locked loop (PLL) technique applied to the analysis of 2-D carrier-frequency fringe patterns is presented. It uses two images with a projected grating shifted in phase by half of its period. The proposed technique was tested for the mannequin shape determination with good results obtained with two iterations only. Due to the properties of the PLL technique there is no problem with phase unwrapping and very short calculation time is needed. © 1997 Society of Photo-Optical Instrumentation Engineers.

© 1997 Society of Photo-Optical Instrumentation Engineers

Citation

Janusz Kozlowski and Giovanni Serra
"New modified phase locked loop method for fringe pattern demodulation", Opt. Eng. 36(7), 2025-2030 (Jul 01, 1997). ; http://dx.doi.org/10.1117/1.601382


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