Open AccessDual wavelength full field imaging in low coherence digital holographic microscopy
Author(s) -
Zahra Monemhaghdoust,
Frédéric Montfort,
Yves Emery,
Christian Depeursinge,
Christophe Moser
Publication year - 2011
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.024005
Subject(s) - optics , holography , coherence (philosophical gambling strategy) , wavelength , microscope , physics , digital holographic microscopy , tilt (camera) , microscopy , detector , optical coherence tomography , stray light , beam (structure) , mechanical engineering , quantum mechanics , engineering
A diffractive optical element (DOE) is presented to simultaneously manipulate the coherence plane tilt of a beam containing a plurality of discrete wavelengths. The DOE is inserted into the reference arm of an off-axis dual wavelength low coherence digital holographic microscope (DHM) to provide a coherence plane tilt so that interference with the object beam generates fringes over the full detector area. The DOE maintains the propagation direction of the reference beam and thus it can be inserted in-line in existing DHM set-ups. We demonstrate full field imaging in a reflection commercial DHM with two wavelengths, 685 nm and 794 nm, resulting in an unambiguous range of 2.494 micrometers.