Parallel phase shifting radial shear interferometry with complex fringes and unknown phase shift

2020 ◽  
Vol 59 (7) ◽  
pp. 2128
Author(s):  
Luis García-Lechuga ◽  
Patricia Pérez-Luna ◽  
Victor H. Flores ◽  
Areli Montes-Pérez ◽  
Adolfo Quiroz-Rodríguez ◽  
...  
Keyword(s):  
Phase Shift ◽  
Phase Shifting ◽  
Unknown Phase

Two-shot common-path phase-shifting interferometer with a four-step algorithm and an unknown phase shift

2014 ◽  
Vol 53 (10) ◽  
pp. 2067 ◽  
Author(s):  
Zhi Zhong ◽  
Bengong Hao ◽  
Mingguang Shan ◽  
Ying Wang ◽  
Ming Diao ◽  
...  
Keyword(s):  
Phase Shift ◽  
Phase Shifting ◽  
Common Path ◽  
Unknown Phase ◽  
Step Algorithm

Blind phase shift extraction and wavefront retrieval by two-frame phase-shifting interferometry with an unknown phase shift

2007 ◽  
Vol 273 (1) ◽  
pp. 54-59 ◽  
Author(s):  
X.F. Xu ◽  
L.Z. Cai ◽  
Y.R. Wang ◽  
X.F. Meng ◽  
H. Zhang ◽  
...  
Keyword(s):  
Phase Shift ◽  
Phase Shifting ◽  
Phase Shifting Interferometry ◽  
Unknown Phase

scholarly journals Measurement of step surface contour based on variable sampling phase shift interference phase extraction algorithm based on selective sampling

2020 ◽  
Author(s):  
Songsong Zhang ◽  
Haisong Huang ◽  
Qiaoqiao Xiong
Keyword(s):  
Phase Shift ◽  
Iterative Algorithm ◽  
Phase Shifting ◽  
Variable Frequency ◽  
Phase Extraction ◽  
Selective Sampling ◽  
Unknown Phase ◽  
Extraction Algorithm ◽  
Interference Phase ◽  
Frequency Phase

Abstract Variable frequency phase shift interferometry is widely applied in optical precision measurement, with the accuracy of phase extraction’s direct impact on that of phase shift interferometry. In the variable-frequency phase-shift interferometry, the commonly used phase-shifting devices are prone to phase shift errors, because the ordinary equal-step phase extraction algorithm, which can be merely used to measure simple and smooth surface, influences the accuracy of phase extraction resulting in measuring error, and causes inefficiency led by the long time the iterative process lasts for when applied in complex stepped surfaces measurement. As a sort of step-by-step phase-shifting phase extraction algorithm based on selective sampling is used to measure the step surface contour, the interference image is firstly sampled at equal intervals to reduce the iterative calculation, and in view of the fact that the phase calibration of the test system is not required in this algorithm, the measured phase is given by using the alternating iterative method despite the unknown phase and unknown phase shift amount. The phase extraction accuracy and iteration time among traditional iterative algorithm, four-step phase shift algorithm and the variable phase shift phase interpolation algorithm based on selective sampling are compared in the simulation and experiment. It is shown that the variable frequency phase shifting interference phase extraction algorithm based on selective sampling has shorter operation time, less error and higher accuracy than traditional iterative algorithm in measuring complex step surface.

Phase retrieval with a three-frame phase-shifting algorithm with an unknown phase shift

2005 ◽  
Vol 44 (8) ◽  
pp. 1401 ◽  
Author(s):  
Cho Jui Tay ◽  
Chenggen Quan ◽  
Lujie Chen
Keyword(s):  
Phase Shift ◽  
Phase Retrieval ◽  
Phase Shifting ◽  
Unknown Phase

Phase Shift Extraction Algorithm by Special Points in Two-Step Generalized Phase-Shifting Interferometry

2016 ◽  
Vol 43 (5) ◽  
pp. 0508004
Author(s):  
周志盛 Zhou Zhisheng ◽  
董玉明 Dong Yuming ◽  
章逸舟 Zhang Yizhou ◽  
焦国华 Jiao Guohua ◽  
鲁远甫 Lu Yuanfu ◽  
...  
Keyword(s):  
Phase Shift ◽  
Phase Shifting ◽  
Phase Shifting Interferometry ◽  
Extraction Algorithm ◽  
Special Points
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