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Synchronous Phase-Shifting Interference for High Precision Phase Imaging of Objects Using Common Optics.

Jiaxi Zhao1, Lin Liu1, Tianhe Wang1

  • 1School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China.

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|May 13, 2023
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Summary
This summary is machine-generated.

This study introduces a new Mach-Zehnder interferometer method for precise quantitative phase imaging of static and dynamic objects. The technique enables high-resolution surface topography and fluid dynamics measurements, especially for moving targets.

Keywords:
Mach–Zehnder interferometerdigital holographyquantitative phase imagingsynchronous phase-shifting

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Area of Science:

  • Optical Physics
  • Metrology
  • Imaging Science

Background:

  • Quantitative phase imaging is crucial for analyzing surface topography and fluid dynamics, particularly for dynamic objects.
  • Existing synchronous phase-shifting methods often suffer from optical path differences or require specialized optics, limiting their application.
  • There is a need for robust and accessible methods for high-precision phase measurement in diverse scientific and industrial fields.

Purpose of the Study:

  • To propose and validate a novel synchronous phase-shifting method for quantitative phase imaging using a Mach-Zehnder interferometer.
  • To overcome the limitations of existing methods by employing common optics and ensuring equal optical paths.
  • To enable high-resolution, high-precision phase reconstruction for both static and dynamic objects.

Main Methods:

  • Development of a synchronous phase-shifting technique based on a Mach-Zehnder interferometer.
  • Simultaneous acquisition of four phase-shifted digital holograms using common optical components.
  • Reconstruction of phase distribution by analyzing the acquired holograms.

Main Results:

  • The proposed system achieved a theoretical resolution of 1.064 µm and an actual resolution of 1.381 µm, confirmed with a phase-only resolution chart.
  • Successful dynamic phase imaging of a moving standard object demonstrated the system's effectiveness for real-time measurements.
  • The method effectively reconstructs phase distributions for both static and dynamic objects with high precision and resolution.

Conclusions:

  • The proposed Mach-Zehnder interferometer-based synchronous phase-shifting method offers a promising solution for quantitative phase imaging.
  • The technique is suitable for precise measurement of surface topography and fluid dynamics, especially for moving objects.
  • This advancement in phase-shifting digital holography opens new avenues for applications requiring high-resolution dynamic measurements.