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Updated: Jul 10, 2026
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Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
Published on: October 11, 2016
Properties of coherence-gated wavefront sensing.
Markus Rueckel1, Winfried Denk
1Department of Biomedical Optics, Max-Planck Institute for Medical Research, Jahnstrasse 29, 69120 Heidelberg, Germany. markus.rueckel@mpimf-heidelberg.mpg.de
Summary
Coherence-gated wavefront sensing can correct aberrations in scattering tissue for improved microscopy. Using circularly polarized light ensures accurate aberration sensing for adaptive optics, restoring diffraction-limited imaging.
Area of Science:
- Biomedical Optics
- Adaptive Optics
- Light Microscopy
Background:
- Coherence-gated wavefront sensing (CGWS) enables aberration correction in scattering media.
- Adaptive optics (AO) are crucial for restoring diffraction-limited imaging in microscopy.
Purpose of the Study:
- To develop a model for characterizing CGWS performance.
- To investigate the impact of coherence length, scatterer density, gate position, and polarization on CGWS.
Main Methods:
- Ray tracing model of ballistic light scattering from discrete scatterers.
- Monte Carlo simulations for model evaluation.
- Experimental verification of model predictions.
Main Results:
- CGWS performance is dependent on coherence length, scatterer density, and gate position.
- Circularly polarized light ensures accurate sensing of all necessary aberrations.
- The model accurately predicts CGWS behavior.
Conclusions:
- A validated model for CGWS performance in scattering tissue is presented.
- Circular polarization is essential for complete wavefront aberration sensing in CGWS.
- This work facilitates improved imaging through scattering media using AO.
