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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.
Sensors (Basel, Switzerland)
|May 13, 2023
Summary
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.
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.
