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About

3D optical information group focuses on acquiring the ultramost possible information from light-matter interaction. 

By exploring novel optical system design and incorporate with advanced data processing techniques, we aim at realizing better contrast, increased sensitivity, enhanced robustness against noise, and more efficient information extraction. Thrusting areas including

Quantitative X-ray phase CT

 

Phase imaging is known to provide contrast enhancement to soft materials compared to conventional absorption-based X-ray imaging techniques. We explore propagation-based 3D phase tomography techniques using grid structured illumination for better sensitivity, sharper resolution, and robustness enhancement against noise. 

OE 22.15 (2014): 18020-18026.

Non-desctructive 3D characterization

 

Many applications including 3D printing request for in-situ monitoring of the 3D macro- and micro- structure evolution. We explore non-destructive x-ray 3D characterization techniques that integrate multi-dimentional signals with compressive sensing algorithms for a 3D reconstruction with minimum exposure. 

Meso-structure characterization based on X-ray dark field imaging  

Dark field imaging collects signals that derives from the main path. In the X-ray domain,

the dark field signal is introduced by small-angle scattering, which highlight the texture structure of the objects. We obtain dark field imaging by register the changes of contrast of the structured illumination. 

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