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Universal phase reconstruction approach of self-calibrating phase-shifting interferometry
Optics Letters
|August 2, 2019
Summary
This study introduces a universal phase reconstruction method for self-calibrating phase-shifting interferometry (PSI). It accurately reconstructs phase maps from interferograms without needing precise phase step knowledge, overcoming limitations of existing techniques.
Area of Science:
- Optical metrology
- Interferometry
- Phase measurement
Background:
- Self-calibrating phase-shifting interferometry (PSI) reconstructs phase maps without prior knowledge of phase steps.
- Existing methods for self-calibrating PSI have limitations regarding the number of interferograms and usage preconditions.
Purpose of the Study:
- To propose a universal, accurate, and efficient phase reconstruction method for self-calibrating PSI.
- To overcome the constraints of current phase reconstruction techniques in PSI.
Main Methods:
- Searching the solution space of phase shifts to find modulation amplitude with minimum coefficient of variation (CV).
- Reconstructing the phase map using the identified optimal phase shifts.
Main Results:
- The proposed method achieves highly accurate phase reconstruction.
- Demonstrated consistency in performance compared to existing popular methods within their applicable ranges.
- Validated through both numerical simulations and experimental studies.
Conclusions:
- The developed method offers a universal and powerful solution for phase reconstruction in self-calibrating PSI.
- This approach enhances the reliability and applicability of PSI techniques.
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