Simultaneous digital correction of amplitude and phase errors of retrieved wave-front in phase-shifting interferometry with arbitrary phase shift errors

2004 ◽  
Vol 233 (1-3) ◽  
pp. 21-26 ◽  
Author(s):  
L.Z Cai ◽  
Q Liu ◽  
X.L Yang
Keyword(s):  
Phase Shift ◽  
Wave Front ◽  
Phase Shifting ◽  
Digital Correction ◽  
Phase Shifting Interferometry ◽  
Phase Errors ◽  
Arbitrary Phase ◽  
Arbitrary Phase Shift ◽  
Amplitude And Phase Errors

scholarly journals New Phase Shifting Algorithms Insensitive to Linear Phase Shift Errors

10.14311/376 ◽  
2002 ◽  
Vol 42 (4) ◽  
Author(s):  
J. Novák
Keyword(s):  
Phase Shift ◽  
Evaluation Process ◽  
Phase Shifting ◽  
Linear Phase ◽  
Phase Errors ◽  
Arbitrary Phase ◽  
Phase Calculation ◽  
Calculation Algorithms ◽  
Phase Evaluation ◽  
New Phase

This article describes and analyses multistep algorithms for evaluating of the wave field phase in interferometric measurements using the phase shifting technique. New phase shifting algorithms are proposed, with a constant but arbitrary phase shift between captured frames of the intensity of the interference field. The phase evaluation process then does not depend on linear phase shift errors. A big advantage of the described algorithms is their ability to determine the phase shift value at every point of the detector plane. A detailed analysis of these algorithms with respect to main factors that affect interferometric measurements is then carried out. The dependency of these algorithms on phase shift values is also studied several phase calculation algorithms are proposed. These are compared with respect to the resulting phase errors.

Demodulating the Phase of Phase-Shifting Shadow Moiré Using Arbitrary Phase Shift

2012 ◽  
Vol 32 (9) ◽  
pp. 0912003
Author(s):  
杜虎兵 Du Hubing ◽  
赵宏 Zhao Hong ◽  
李兵 Li Bing ◽  
赵金磊 Zhao Jinlei ◽  
曹士旭 Cao Shixu
Keyword(s):  
Phase Shift ◽  
Phase Shifting ◽  
Shadow Moire ◽  
Shadow Moiré ◽  
Arbitrary Phase ◽  
Arbitrary Phase Shift
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