1. Institut d'Optique

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    1. Mentioned In 19 Articles

    2. A compact high‐speed full‐field optical coherence microscope for high‐resolution in vivo skin imaging

      A compact high‐speed full‐field optical coherence microscope for high‐resolution in vivo skin imaging
      A compact high‐speed full‐field optical coherence microscope has been developed for high‐resolution in vivo imaging of biological tissues. The interferometer, in the Linnik configuration, has a size of 11115 cm 3 and a weight of 210 g. Full‐field illumination with low‐coherence light is achieved with a high‐brightness broadband light‐emitting diode. High‐speed full‐field detection is achieved by using part of the image ...
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    3. Focus defect and dispersion mismatch in full-field optical coherence microscopy

      Focus defect and dispersion mismatch in full-field optical coherence microscopy
      Full-field optical coherence microscopy (FFOCM) is an optical technique, based on low-coherence interference microscopy, for tomographic imaging of semi-transparent samples with micrometer-scale spatial resolution. The differences in refractive index between the sample and the immersion medium of the microscope objectives may degrade the FFOCM image quality because of focus defect and optical dispersion mismatch. These phenomena and their consequences are discussed in this theoretical paper. Experimental methods that have been ...
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    4. A simplified algorithm for digital fringe analysis in two-wave interferometry with sinusoidal phase modulation

      A simplified algorithm for digital fringe analysis in two-wave interferometry with sinusoidal phase modulation
      A compact simplified algorithm for digital detection of the amplitude and phase of the interferometric signal delivered by a two-wave interferometer with sinusoidal phase modulation is presented. The algorithm consists of simple mathematical combinations of four frames obtained by integration by a camera of the time-varying intensity in an interference pattern during the four successive quarters of the modulation period. The algorithm is invariant by circular permutation of the four ...
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    5. Wide-field, full-field optical coherence microscopy for high-axial-resolution phase and amplitude imaging

      Wide-field, full-field optical coherence microscopy for high-axial-resolution phase and amplitude imaging
      An original single-objective, full-field optical coherence microscopy system is reported that is capable of imaging both the phase and the amplitude of semi-transparent samples over a field of view of 17.5 mm 17.5 mm with an axial sectioning resolution of 1.5 m. A special stack acquisition arrangement ensures optimal reachable imaging depth. Several phase-shifting interferometry algorithms for phase measurement with broadband light are compared theoretically and experimentally ...
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    6. Supercontinuum sources in optical coherence tomography: A state of the art and the application to scan-free time domain correlation techniques and depth dependant dispersion compensation

      Supercontinuum sources in optical coherence tomography: A state of the art and the application to scan-free time domain correlation techniques and depth dependant dispersion compensation
      Supercontinuum generation and the development of light sources based on these effects are discussed. We especially emphasize on the use of such sources for optical coherence tomography imaging after a brief overview of OCT systems. Finally we demonstrate the use of a commercial supercontinuum in the frame of scan-free time domain correlation and optically processed depth dependant dispersion Compensation.
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    7. Extended full-field optical coherence microscopy

      Extended full-field optical coherence microscopy
      Full-field optical coherence microscopy (FF-OCM) is a recent optical technology based on low-coherence interference microscopy for semi-transparent sample imaging with ~ 1 m spatial resolution. FF-OCM has been successfully applied to three-dimensional imaging of various biological tissues at cellular-level resolution. The contrast of FF-OCM images results from the intensity of light backscattered by the sample microstructures. This contrast mechanism, based on refractive index changes, provides information on the internal architectural morphology ...
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    8. Spectroscopic polarization-sensitive full-field optical coherence tomography

      Spectroscopic polarization-sensitive full-field optical coherence tomography
      Full-field optical coherence tomography (FF-OCT) is a recent optical imaging technology based on low-coherence interference microscopy for imaging of semi-transparent samples with ~1 µm spatial resolution. FF-OCT produces en-face tomographic images obtained by arithmetic combination of interferometric images acquired by an array camera. In this paper, we demonstrate a unique multimodal FF-OCT system, capable of measuring simultaneously the intensity, the power spectrum and the phase-retardation of light backscattered by the ...
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    9. Feature Of The Week 3/20/11: Micro-Spectrometry with Full-Field Optical Coherence Tomography

      Feature Of The Week 3/20/11: Micro-Spectrometry with Full-Field Optical Coherence Tomography
      Feature Of The Week 3/20/11: Optical Coherence Tomography (OCT) is today a well-known technique for three-dimensional imaging with high resolution. Full-field OCT is based on the principle of en-face imaging that can achieve micrometer resolution. Nevertheless, based on the spatial variation of the refractive index, OCT imaging can be advantageously coupled to spectral information to provide complementary information.An original full-field OCT has been developed at the Institut ...
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    10. Full-field optical coherence tomography at 800 nm and 1300 nm simultaneously

      Full-field optical coherence tomography at 800 nm and 1300 nm simultaneously
      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 ...
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    11. Study and suppression of motion artifacts in full-field optical coherence tomography

      Study and suppression of motion artifacts in full-field optical coherence tomography
      Delphine Sacchet, Julien Moreau, Patrick Georges et al. 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 instant ... [Proc. SPIE 7715, 77150A (2010)] published Fri May 14, 2010.
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    12. Motion artifact suppression in full-field optical coherence tomography

      Motion artifact suppression in full-field optical coherence tomography
      Significant motion artifacts limit the performance of conventional full-field optical coherence tomography (FF-OCT) for in-vivo imaging. We present a theoretical and experimental study of those limitations. A new FF-OCT system suppressing most of artifacts due to sample motions is demonstrated using instantaneous phase shifting with nonpolarizing optics and pulsed illumination. The experimental setup is based on a Linnik-type interferometer illuminated by the superluminescence emission from a Ti:Al2O3 waveguide crystal ...
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    13. Acousto-optical coherence tomography using random phase jumps on ultrasound and light

      Acousto-optical coherence tomography using random phase jumps on ultrasound and light
      Imaging objects embedded within highly scattering media by coupling light and ultrasounds (US) is a challenging approach. In deed, US enable direct access to the spatial localization, though resolution can be poor along their axis (cm). Up to now, several configurations have been studied, giving a millimetric axial resolution by applying to the US a microsecond pulse regime, as is the case with conventional echography. We introduce a new approach ...
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    14. Simultaneous dual-band ultra-high resolution full-field optical coherence tomography

      Simultaneous dual-band ultra-high resolution full-field optical coherence tomography
      Ultrahigh-resolution full-field optical coherence tomography (FF-OCT) is demonstrated in the 800 nm and 1200 nm wavelength regions simultaneously using a Silicon-based (Si) CCD camera and an Indium Gallium Arsenide (InGaAs) camera as area detectors and a halogen lamp as illumination source. The ... [Opt. Express 16, 19434-19446 (2008)]
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  2. About Institut d'Optique

    Institut d'Optique

    Institut d'Optique Graduate School can be considered as the first leading institution devoted to Optical Science and Engineering throughout the Western World by the number of Master's degrees awarded every year. Education is provided by Faculty members from Laboratoire Charles Fabry (LCFIO). International leader in numerous aspects of Research in Optics and Photonics, LCFIO is a joint Research unit of Institut d’Optique, CNRS and Université Paris Sud 11.