Etienne Cuche

TL;DR: A new application of digital holography for phase-contrast imaging and optical metrology and an application to surface profilometry shows excellent agreement with contact-stylus probe measurements.

TL;DR: Off-axis holograms recorded with a magnified image of microscopic objects are numerically reconstructed in amplitude and phase by calculation of scalar diffraction in the Fresnel approximation to show that the transverse resolution is equal to the diffraction limit of the imaging system.

TL;DR: A digital holographic microscope, in a transmission mode, especially dedicated to the quantitative visualization of phase objects such as living cells, is developed, based on an original numerical algorithm presented in detail elsewhere.

TL;DR: Off-axis holograms recorded with a CCD camera are numerically reconstructed with a calculation of scalar diffraction in the Fresnel approximation and the zero order of diffraction and the twin image are digitally eliminated by means of filtering their associated spatial frequencies in the computed Fourier transform of the hologram.

TL;DR: A digital holographic microscope adapted to the quantitative study of cellular dynamics, in a transmission mode, and allows to determine independently the thickness and the integral refractive index of cells.