https://biocil.github.io/tr/author/christian-depeursinge/Recent content in Christian Depeursinge on Phi-XHugotr-TRSun, 21 Apr 2013 00:00:00 +0000https://biocil.github.io/tr/publication/2013_dh_depeursinge/Sun, 01 Jan 2017 00:00:00 +0000https://biocil.github.io/tr/publication/2013_dh_depeursinge/Digital Holographic Microscopy (DHM) yields reconstructed complex wavefields. It allows synthesizing the aperture of a virtual microscope up to 2π, offering super-resolution phase images. Live images of micro-organisms and neurons with resolution less than 100 nm are presented.https://biocil.github.io/tr/publication/2013_nphoton_cotte/Sun, 01 Jan 2017 00:00:00 +0000https://biocil.github.io/tr/publication/2013_nphoton_cotte/We introduce a microscopic method that determines quantitative optical properties beyond the optical diffraction limit and allows direct imaging of unstained living biological specimens.https://biocil.github.io/tr/publication/2012_ol_toy/Sun, 01 Jan 2017 00:00:00 +0000https://biocil.github.io/tr/publication/2012_ol_toy/In this Letter we propose a fast off-axis hologram autofocusing (AF) approach that is based on the redundant data elimination by the critical resampling of the contained complex field.https://biocil.github.io/tr/publication/2012_fom_depeursinge/Sun, 01 Jan 2017 00:00:00 +0000https://biocil.github.io/tr/publication/2012_fom_depeursinge/As an illustration of the resolution improvement achieved with the synthetized aperture approach, Fig. 1 shows the resolution improvement obtained on a phase image. In summary, synthetizing the spatial frequencies spectrum in the reciprocal space leads to resolution improvement.https://biocil.github.io/tr/publication/2012_3dmultidim_toy/Sun, 01 Jan 2017 00:00:00 +0000https://biocil.github.io/tr/publication/2012_3dmultidim_toy/Experiments on live myoblast cells are carried out on two different platforms; random positioning machine (RPM), a ground base microgravity simulation platform, and parabolic flight campaign (PFC), a fixed wing plane flight providing short durations of alternating gravity conditions. Results show clear perinuclear phase increase. During seconds scale microgravity exposure, measurable scale morphological modifications are observed with the accumulated effect of repetitive exposures and short breaks.https://biocil.github.io/tr/publication/2012_bopex_toy/Sun, 01 Jan 2017 00:00:00 +0000https://biocil.github.io/tr/publication/2012_bopex_toy/We describe an optimized digital holographic microscopy system (DHM) suitable for high-resolution visualization of living cells under conditions of altered macroscopic mechanical forces such as those that arise from changes in gravitational force.https://biocil.github.io/tr/publication/2011_fio_cotte/Sun, 01 Jan 2017 00:00:00 +0000https://biocil.github.io/tr/publication/2011_fio_cotte/We present a new technique for coherent imaging based on digital holographic microscopy. For high-resolution tomography, the diffraction effect of the microscope objective is corrected by the system’s complex point spread function.https://biocil.github.io/tr/publication/2011_jbo_cotte/Sun, 01 Jan 2017 00:00:00 +0000https://biocil.github.io/tr/publication/2011_jbo_cotte/With different illumination phases, enhanced bandpass information content is demonstrated, and its spatial resolution is theoretically shown to be potentially signal-to-noise ratio limited.https://biocil.github.io/tr/publication/2011_bopex_cotte/Sun, 01 Jan 2017 00:00:00 +0000https://biocil.github.io/tr/publication/2011_bopex_cotte/We present a novel technique for three-dimensional (3D) image processing of complex fields.https://biocil.github.io/tr/publication/2011_fom_cotte/Sun, 01 Jan 2017 00:00:00 +0000https://biocil.github.io/tr/publication/2011_fom_cotte/We propose a method to improve the spatial resolution of such coherent microscopy systems by filtering of the coherent transfer function (CTF). The 3D complex deconvolution is presented and potential applications shown.https://biocil.github.io/tr/publication/2010_opex_cotte/Sun, 01 Jan 2017 00:00:00 +0000https://biocil.github.io/tr/publication/2010_opex_cotte/We demonstrate that complex deconvolution does not require any additional optics in the DHM setup while extending the limit of resolution with coherent illumination by a factor of at least 1.64.https://biocil.github.io/tr/publication/2010_ol_cotte/Sun, 01 Jan 2017 00:00:00 +0000https://biocil.github.io/tr/publication/2010_ol_cotte/The limit of resolution with coherent illumination is extended by a factor of 1.64x.https://biocil.github.io/tr/publication/2010_dh_toy/Sun, 01 Jan 2017 00:00:00 +0000https://biocil.github.io/tr/publication/2010_dh_toy/A microscope operating in Digital Holographic Microscopy (DHM) and classical widefield epi-fluorescence microscopy in a time sequential manner is developed to study morphological alterations of mouse myoblast cells under simulated microgravity in real time.https://biocil.github.io/tr/publication/2010_fom_cotte/Sun, 01 Jan 2017 00:00:00 +0000https://biocil.github.io/tr/publication/2010_fom_cotte/A coherent sub-wavelength resolution in a high-NA diffraction-limited optical system is demonstrated using a transmission DHM setup. By adapting inverse deconvolution post processing to coherent illumination conditions, a complex deconvolution procedure is derived.https://biocil.github.io/tr/publication/2010_jbo_pache/Sun, 01 Jan 2017 00:00:00 +0000https://biocil.github.io/tr/publication/2010_jbo_pache/The DHM analysis reveals cytoskeletal alterations similar to those previously reported with conventional methods, and in agreement with conventional brightfield fluorescence microscopy a posteriori investigation.https://biocil.github.io/tr/publication/2010_3dmultidim_toy/Sun, 01 Jan 2017 00:00:00 +0000https://biocil.github.io/tr/publication/2010_3dmultidim_toy/A dual mode microscope is developed to study morphological evolution of mouse myoblast cells under simulated microgravity in real time.