12 May 2016 Absorption-phase duality in structured illumination transport of intensity (TIE) phase imaging
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Abstract
Robust phase retrieval is obtained by using structured illumination with the Transport of Intensity Equation (SI-TIE). By imposing a proportional relationship between the attenuation coefficient and the refractive index (known as the phase-absorption duality), we are allowed to reformulate the SI-TIE propagation equation to probably address both the transmission and diffraction signals using only a single shot of intensity measurement. The correlation between the phase and attenuation fixes the low frequency instability, resulting in robust phase imaging with enhanced sensitivity.
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Yunhui Zhu, "Absorption-phase duality in structured illumination transport of intensity (TIE) phase imaging", Proc. SPIE 9847, Anomaly Detection and Imaging with X-Rays (ADIX), 984709 (12 May 2016); doi: 10.1117/12.2229094; https://doi.org/10.1117/12.2229094
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