Phase-shifting algorithm via wavelength tuning based on temporal Fourier transform

2003 ◽  
Author(s):  
Yingjie Yu ◽  
Benhao Zhang ◽  
Yunfang Jiao
Keyword(s):  
Fourier Transform ◽  
Phase Shifting ◽  
Wavelength Tuning

Multi-STFT for adaptive SCPS phase determination

2009 ◽  
Vol 17 (4) ◽  
Author(s):  
R. Sitnik
Keyword(s):  
Fourier Transform ◽  
Carrier Phase ◽  
Fringe Pattern ◽  
Phase Shifting ◽  
Shape Measurement ◽  
Step Method ◽  
Phase Determination ◽  
3D Shape Measurement ◽  
Phase Calculation ◽  
Carrier Phase Shifting

AbstractThis paper presents a fast and reliable approach for phase modulo 2π-calculation from a single fringe pattern. It calculates correct phase values even for very complex and variable shape gradients based on a locally variable fringe period determined for the entire image. In the paper, a new two-step method for wrapped phase calculation is proposed. It is performed through the use of a method based on a multiple local fast Fourier transform for estimation of a local fringes period map and a 5-point spatial carrier phase shifting (SCPS) formula for phase modulo 2π-calculation. The described approach is verified by a correct demodulation of a real fringe pattern taken by a 3D-shape measurement system.

Principal and Error Analysis on Measurement of Multiple-Surface Interference with Wavelength-Tuning Phase-Shifting

2013 ◽  
Vol 40 (10) ◽  
pp. 1008007 ◽  
Author(s):  
刘勇 Liu Yong ◽  
刘旭 Liu Xu ◽  
任寰 Ren Huan ◽  
姜宏振 Jiang Hongzhen ◽  
杨一 Yang Yi ◽  
...  
Keyword(s):  
Error Analysis ◽  
Phase Shifting ◽  
Wavelength Tuning

Generalized Phase-Shifting Phase Retrieval Approach Based on Time-Domain Fourier Transform

2015 ◽  
Vol 42 (9) ◽  
pp. 0908004
Author(s):  
张望平 Zhang Wangping ◽  
吕晓旭 Lü Xiaoxu ◽  
刘胜德 Liu Shengde ◽  
赵晖 Zhao Hui ◽  
钟丽云 Zhong Liyun
Keyword(s):  
Fourier Transform ◽  
Time Domain ◽  
Phase Retrieval ◽  
Phase Shifting
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