Real-time fringe pattern demodulation with a second-order digital phase-locked loop

被引：0

作者：

Gdeisat, Munther A. ^{[1
]}

Burton, David R. ^{[1
]}

Lalor, Michael J. ^{[1
]}

机构：

[1] Coherent/Electro Opt. Research Group, School of Engineering, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, United Kingdom

来源：

Applied Optics | 2000年 / 39卷 / 29期

关键词：

Computer systems - Demodulation - Fourier transforms - Image processing;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The use of a second-order digital phase-locked loop (DPLL) to demodulate fringe patterns is presented. The second-order DPLL has better tracking ability and more noise immunity than the first-order loop. Consequently, the second-order DPLL is capable of demodulating a wider range of fringe patterns than the first-order DPLL. A basic analysis of the first- and the second-order loops is given, and a performance comparison between the first- and the second-order DPLL's in analyzing fringe patterns is presented. The implementation of the second-order loop in real time on a commercial parallel image processing system is described. Fringe patterns are grabbed and processed, and the resultant phase maps are displayed concurrently. © 2000 Optical Society of America.

引用

页码：5326 / 5336