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One-shot phase-shifting interferometry: five, seven, and nine interferograms.

Gustavo Rodriguez-Zurita1, Noel-Ivan Toto-Arellano, Cruz Meneses-Fabian

  • 1Facultad de Ciencias Físico-Matemáticas, Benemérita Universidad Autónoma de Puebla, Apartado Postal 1152, Puebla PUE 72000, México. gzurita@fcfm.buap.mx

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Summary
This summary is machine-generated.

This study introduces an advanced phase-shifting interferometry technique to capture more than four interferograms simultaneously. This method enables more accurate extraction of evolving phase distributions over time.

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Area of Science:

  • Optical Physics
  • Metrology

Background:

  • Phase-shifting interferometry is crucial for analyzing dynamic phase distributions.
  • Existing systems are limited to capturing only four interferograms, restricting temporal resolution.

Purpose of the Study:

  • To develop an interferometric system capable of capturing more than four interferograms simultaneously.
  • To improve the extraction accuracy of time-evolving phase distributions.

Main Methods:

  • Utilizing an interferometer with a two-window object plane and a phase grid pupil.
  • Employing polarization modulation for diffraction orders in the image plane.
  • Simultaneously capturing multiple interferograms with prescribed phase shifts.

Main Results:

  • Successfully obtained five, seven, and nine interferograms.
  • Demonstrated the feasibility of capturing more than four interferograms.

Conclusions:

  • The developed interferometer effectively captures multiple phase-shifted interferograms.
  • This advancement enhances the capability of phase-shifting interferometry for dynamic measurements.