Simultaneous three-wavelength unwrapping using external digital holographic multiplexing module

Nir A. Turko, Pinkie Jacob Eravuchira, Itay Barnea, Natan T. Shaked*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We present an external interferometric setup that is able to simultaneously acquire three wavelengths of the same sample instance without scanning or multiple exposures. This setup projects onto the monochrome digital camera three off-axis holograms with rotated fringe orientations, each from a different wavelength channel, without overlap in the spatial-frequency domain, and thus allows the full reconstruction of the three complex wavefronts from the three wavelength channels. We use this new setup for three-wavelength phase unwrapping, allowing phase imaging of thicker objects than possible with a single wavelength, but without the increased level of noise. We demonstrate the proposed technique for micro-channel profiling and label-free cell imaging.

Original languageEnglish
Pages (from-to)1943-1946
Number of pages4
JournalOptics Letters
Volume43
Issue number9
DOIs
StatePublished - 1 May 2018

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