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Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

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Calculation method for a quadrature phase-shifting interferometer and its applications.

Suezou Nakadate¹, Shinya Sawada, Tomohiro Kiire

¹Department of Media Engineering, Faculty of Engineering, Tokyo Polytechnic University, 1583 Iiyama, Atsugi, Kanagawa 243-0297, Japan. nakadate@mega.t‐kougei.ac.jp

|January 8, 2013

Summary

A new calculation method for quadrature phase-shifting interferometry accurately determines phase distribution. This technique is validated for specular, speckle interferometers, and digital holography applications.

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Area of Science:

Optics and Photonics
Interferometry
Digital Imaging

Background:

Phase-shifting interferometry is crucial for precise optical measurements.
Existing methods may face limitations in accuracy or applicability.
Digital holography and speckle interferometry require robust phase retrieval.

Purpose of the Study:

To present a novel calculation method for quadrature phase-shifting interferometry.
To demonstrate its application in specular and speckle interferometers.
To validate its utility in digital holography.

Main Methods:

Acquisition of two sets of quadrature phase-shifted interferograms.
Application of a proposed calculation algorithm for phase distribution retrieval.
Error analysis and experimental validation.

Main Results:

The proposed method successfully calculates phase distribution from interferograms.
Experimental results confirm accuracy for specular interferometers.
Effective application demonstrated for speckle interferometers and digital holography.

Conclusions:

The presented calculation method offers a reliable approach for phase retrieval in various interferometric techniques.
It enhances the capabilities of specular and speckle interferometers.
It provides a valuable tool for digital holography applications.