Journal ArticleDOI
Dynamic Mach-Zehnder interferometer based on the lateral displacement of a point source array.
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TLDR
The experimental results show the feasibility and high precision of this dynamic Mach-Zehnder interferometer, and the phase distribution can be retrieved exactly, thereby realizing dynamic measurement.Abstract:
A dynamic Mach-Zehnder interferometer based on lateral displacement of a point source array is proposed. The point source array is generated by a point source and a phase grating, where four point sources are of identical intensity. The lateral displacement of each point source can be adjusted to introduce π/2 phase steps in the interferograms. With a specially designed lens array in the spatial split imaging system, four separated and clear imaging interferograms can be captured in a single shot. Using a four-bucket algorithm, the phase distribution can be retrieved exactly, thereby realizing dynamic measurement. The experimental results show the feasibility and high precision of this dynamic Mach-Zehnder interferometer.read more
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Interferogram Analysis: Digital Fringe Pattern Measurement Techniques
TL;DR: Introductory digital image processing optical techniques intensity based analysis methods temporal phase measurement methods spatial phase measurements methods phase unwrapping methods analysis methods in speckle photography and PIV applications.
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Pixelated mask spatial carrier phase shifting interferometry algorithms and associated errors.
TL;DR: A formula for the phase calculation error in spatial carrier phase shifting interferometry is derived and the error associated with the use of linear N-point averaging algorithms is presented and compared with those of the pixelated spatial carrier technique.
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Real-time polarization phase shifting technique for dynamic deformation measurement
TL;DR: By using a special Ronchi phase grating and polarization phase shifting method, four phase shifted patterns can be captured simultaneously, and then the dynamic deformation can be measured as discussed by the authors, and the analysis and experiments are given.
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A novel instrument for transient photoelasticity
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