Optical coherence tomography (OCT) is a technique of choice for micrometer-scale resolution imaging of biological
specimens [1,2]. Full-field optical coherence tomography (FF-OCT) was introduced a few years ago as an alternative
method to conventional OCT. FF-OCT is based on an interference microscope with a camera as an array detector
combined with a low coherence illumination source for parallel acquisition of en-face oriented tomographic images [3-
5]. FF-OCT is a technique of choice for noninvasive three-dimensional imaging of ex vivo biological tissues with
ultrahigh spatial resolution (~ 1 μm) [6,7]. FF-OCT is based on phase-shifting interferometry: several interferometric
images are acquired with an image sensor, a phase-shift being introduced between each of these frames by using, for
example, the displacement of the reference mirror. The amplitude of the interference signal, i.e. the fringe envelope, is
calculated by combination of these frames [8-11].
Recent developments in OCT technology have been carried out in order to exploit the spectroscopic response of the
imaged sample. This technique, referred to as spectroscopic OCT, detects and processes the interferometric signal to
provide spatially-resolved spectroscopic information. It can be used to enhance image contrast, permitting better
differentiation of tissues through their spectroscopic properties and providing additional information on the sample
composition [12-14]. An alternative method to take advantage of the spectroscopic response of the sample is to image at
several distinct wavelengths. This can be achieved by using several detectors [15,16] or several illumination sources.
Spectroscopic imaging with FF-OCT, using several detectors, is demonstrated in this paper.
Significant motion artifacts limit performance of conventional
full-field optical coherence tomography
for in vivo imaging. A theoretical and experimental study of those limitations is presented and a new
FF-OCT system suppressing most of artifacts due to sample motions is demonstrated using
instantaneous phase-shifting with non-polarizing optics and pulsed illumination.
Multi-band ultrahigh-resolution full-field optical coherence tomography, achieving a detection
sensitivity of 90 dB and a micrometer-scale resolution in the three directions, is demonstrated using
several detectors or a spectrally adjustable illumination source.