Quantitative phase noise in a two-color low coherence Digital Holographic Microscope

Zahra Monemhaghdoust, Frédéric Montfort, Yves Emery, Christian Depeursinge, Christophe Moser

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

In digital holographic microscopy (DHM), the long coherence length of laser light causes parasitic interferences due to multiple reflections in and by optical components in the optical path of the microscope and thus degrades the image quality. The parasitic effects are greatly reduced by using a short coherence length light. The main drawback of using a short coherence light source in an off-axis digital holographic microscope, is the reduction of the interference fringe contrast occurring in the field of view. Previously, we introduced a volume diffractive optical element (VDOE) placed in the reference arm of a DHM to correct the coherence plane tilt so as to obtain a high interference contrast throughout the field of view . Here, we experimentally quantify the spatial and temporal phase noise in the extracted phase image caused by non-homogeneities and scattering of the VDOE element itself. The results over five VDOEs show that the temporal phase noise is unchanged and a slight increase (up to 20%) is observed in the spatial phase noise. These results show that even with a low coherence source, a full field of view can be obtained with an off-axis DHM thanks to the VDOE without introducing significant additional phase noise.

Original languageEnglish (US)
Title of host publicationPractical Holography XXVII
Subtitle of host publicationMaterials and Applications
Volume8644
DOIs
StatePublished - 2013
Externally publishedYes
EventSPIE Practical Holography XXVII: Materials and Applications - San Francisco, CA, United States
Duration: Feb 3 2013Feb 4 2013

Other

OtherSPIE Practical Holography XXVII: Materials and Applications
CountryUnited States
CitySan Francisco, CA
Period02/3/1302/4/13

Keywords

  • Diffraction gratings
  • Digital holographic microscopy
  • Phase noise

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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