Quantitative phase imaging and holography allow highly sensitive detection of phase changes, for example of surface non-uniformities or refractive index structures in the volume of a sample. For many applications, wide field-of-view (FoV) and high phase sensitivity are required. In this work, we propose and demonstrate a novel implementation of lens-free phase imaging with phase-shifting interferometry and multi-angle illumination that enhances axial resolution and image quality, enabling ultra-high phase sensitivity with optical path difference background root-mean-square noise of 0.2 nm, while operating over a wide FoV.
Month: February 2023
PoliFAB annual user meeting 2023
On February 10th, the PoliFAB annual meeting has taken place. As tradition, the users have presented the activities carried out in the cleanroom. Recent experiments and technological advancements demonstrated through our programmable femtosecond laser written circuits have been presented with an oral talk and a poster.