Simultanous two-wavelength phase unwrapping using external module for multiplexing off-axis holography
Abstract
We present a dual-wavelength external holographic microscopy module for quantitative phase imaging of 3D structures with extended thickness range. This is done by simultaneous acquisition of two off-axis interferograms, each of which at a different wavelength, and generation of a synthetic wavelength, which is larger than the sample optical thickness, allowing two-wavelength unwrapping. The simultaneous acquisition is carried out by using optical multiplexing of the two interferograms onto the camera, where each of them has orthogonal off-axis interference fringe direction in relation to the other one. We used the system to quantitatively image a 7.96 um step target and 30.5 um circular copper pillars.
Cite
@article{arxiv.1904.01445,
title = {Simultanous two-wavelength phase unwrapping using external module for multiplexing off-axis holography},
author = {Nir A. Turko and Natan T. Shaked},
journal= {arXiv preprint arXiv:1904.01445},
year = {2019}
}
Comments
https://www.osapublishing.org/ol/abstract.cfm?uri=ol-42-1-73