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Two-step phase demodulation algorithm based on quadratic phase parameter estimation using state space analysis

delete2018-11-01
delete17
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R
Rishikesh Kulkarni *
P
Pramod K. Rastogi
DOI:10.1016/j.optlaseng.2018.05.012delete
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摘要

摘要

En 中文
We propose a noise robust two-step phase shifting algorithm for the evaluation of random and unknown phase step. In this algorithm, the phase within a small size two-dimensional window around a user selected pixel in an interferogram is approximated as a quadratic surface. The problem of quadratic phase fitting parameter estimation is formulated as a state space analysis performed using the extended Kalman filter. The phase step is evaluated from the estimated parameters and subsequently the interferogram phase distribution is obtained. Simulation and experimental results are demonstrated.
Keyword:
Phase estimation
Two-step phase shifting interferometry
Quadratic phase
State space analysis
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期刊

Optics and Lasers in Engineering 封面图
Optics and Lasers in Engineering
IF:
3.7
论文数:
7.2K
被引数:
1.7W

机构

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indian institute of technology (iit) - guwahati
学者数:
3.3K
论文数: 3.2K
被引数: 2
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indian institute of technology system (iit system)
学者数:
9.5W
论文数: 9.9W
被引数: 93
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