Real-time dual-wavelength digital holographic microscopy with a single hologram acquisition

Jonas Kuhn*, Tristan Colomb, Frédéric Montfort, Florian Charrière, Yves Emery, Etienne Cuche, Pierre Marquet, Christian Depeursinge

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

408 Scopus citations


A technique to perform two-wavelengths digital holographic microscopy (DHM) measurements with a single hologram acquisition is presented. The vertical measurement range without phase ambiguity is extended to the micron-range, thanks to the resulting synthetic wavelength defined by the beating of two wavelengths with a separation of about 80nm. Real-time dual-wavelength imaging is made possible by using two reference waves having different wavelengths and propagation directions for the hologram recording. The principle of the method is exposed and experimental results concerning a 1.2μm m high test sample as well as a moving micro-mirror are presented. To the extent of our knowledge, this is the first time that real-time synthetic beat-wavelength digital holography measurements are reported.

Original languageEnglish (US)
Pages (from-to)7231-7242
Number of pages12
JournalOptics Express
Issue number12
StatePublished - Jun 11 2007
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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