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Updated: Jun 22, 2026
10:39
Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
Published on: October 11, 2016
3-D coherence holography using a modified Sagnac radial shearing interferometer with geometric phase shift.
Dinesh N Naik1, Takahiro Ezawa, Yoko Miyamoto
1Department of Information and Communication Engineering, The University of Electro-Communications, Tokyo, Japan. naik@ice.uec.ac.jp
Optics Express
|June 25, 2009
Summary
A novel coherence holography technique uses a modified interferometer to reconstruct 3D objects. This advance enables controllable magnification for coherence imaging microscopy.
Area of Science:
- Optics and Photonics
- Holography
- Interferometry
Background:
- Coherence holography enables 3D reconstruction of objects.
- Existing methods face limitations in resolution and flexibility.
- Radial shearing interferometers offer unique phase-shifting capabilities.
Purpose of the Study:
- To propose and experimentally demonstrate a new image reconstruction scheme for coherence holography.
- To achieve off-axis 3D object reconstruction with depth information.
- To explore the potential for coherence imaging microscopy.
Main Methods:
- Utilized a modified Sagnac-type radial shearing interferometer.
- Incorporated a geometric phase shift for enhanced reconstruction.
- Employed Leith-type coherence holography principles.
Main Results:
- Successfully reconstructed off-axis 3D objects with depth information.
- The reconstructed image is represented by a coherence function.
- Demonstrated controllable magnification of the reconstructed image.
Conclusions:
- The proposed scheme offers a viable method for coherence holography.
- Controllable magnification opens new avenues for coherence imaging microscopy.
- This work advances the field of holographic 3D imaging.
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