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Fast temporal phase unwrapping method for the fringe reflection technique based on the orthogonal grid fringes
BO LI1,2; SUODONG MA3,4; YANG ZHAI1,2
2015-07
Source PublicationApplied Optics
Volume54Issue:20Pages:6282-6290
Abstract
In traditional temporal phase unwrapping (TPU) algorithms, wrapped phases with different spatial frequencies are obtained from several groups of phase shift fringes to calculate the unwrapped phase. Therefore, the necessary quantity of captured fringes is very large, especially for the fringe reflection technique (FRT), since a pair of phases should be unwrapped to get the slopes of two perpendicular directions. In this paper, we propose a fast TPU algorithm based on the orthogonal grid fringes by which only one image is needed to extract the two integer phases for each frequency instead of two groups of phase shift fringes, and then they can be added into the wrapped phases separately to complete the unwrapping. There are ridge errors in the direct unwrapped phases, but they are significantly suppressed by our pseudo-phase-shift strategy without any extra captured fringes. The proposed method is robust and effective where the fringe amount used for unwrapping is only 1/4 of the previous
similar algorithm and 1/6–1/8 of the traditional TPU methods.

The detailed comparison of measurement time is also given, which demonstrate that the FRT measurement can be accelerated in most cases by our method. The algorithm is validated by the experiments, which still works well for the severely defocusing fringes or complex specimen.
KeywordFringe Analysis Surface Measurements Figure
Subject Area天文技术与方法
Language英语
Document Type期刊论文
Identifierhttp://ir.niaot.ac.cn/handle/114a32/1181
Collection中国科学院南京天文光学技术研究所_期刊论文
中科院天文光学技术重点实验室_期刊论文
大口径光学技术研究室_期刊论文
Affiliation1.Nanjing Institute of Astronomical Optics & Technology
2.Key Laboratory of Astronomical Optics & Technology,Chinese Academy of Sciences
3.College of Physics, Optoelectronics and Energy, Soochow University, Suzhou
4.Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou
Recommended Citation
GB/T 7714
BO LI,SUODONG MA,YANG ZHAI. Fast temporal phase unwrapping method for the fringe reflection technique based on the orthogonal grid fringes[J]. Applied Optics,2015,54(20):6282-6290.
APA BO LI,SUODONG MA,&YANG ZHAI.(2015).Fast temporal phase unwrapping method for the fringe reflection technique based on the orthogonal grid fringes.Applied Optics,54(20),6282-6290.
MLA BO LI,et al."Fast temporal phase unwrapping method for the fringe reflection technique based on the orthogonal grid fringes".Applied Optics 54.20(2015):6282-6290.
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