Open AccessPractical phase unwrapping of interferometric fringes based on unscented Kalman filter technique
Author(s) -
Zhiyun Cheng,
Dong Liu,
Yongying Yang,
Taotao Ling,
Xiaoyu Chen,
Lei Zhang,
Jian Bai,
Yibing Shen,
Miao Liu,
Wei Huang
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.032337
Subject(s) - interferometry , kalman filter , computer science , distortion (music) , phase unwrapping , phase (matter) , wavefront , algorithm , noise (video) , optics , filter (signal processing) , phase noise , computer vision , artificial intelligence , image (mathematics) , physics , telecommunications , amplifier , bandwidth (computing) , quantum mechanics
A phase unwrapping algorithm for interferometric fringes based on the unscented Kalman filter (UKF) technique is proposed. The algorithm can bring about accurate phase unwrapping and good noise suppression simultaneously by incorporating the true phase and its derivative in the state vector estimation through the UKF process. Simulations indicate that the proposed algorithm has better accuracy than some widely employed phase unwrapping approaches in the same noise condition. Also, the time consumption of the algorithm is reasonably acceptable. Applications of the algorithm in our different optical interferometer systems are provided to demonstrate its practicability with good performance. We hope this algorithm can be a practical approach that can help to reduce the systematic errors significantly induced by phase unwrapping process for interferometric measurements such as wavefront distortion testing, surface figure testing of optics, etc.