title: Simultaneous amplitude-contrast and quantitative phase-contrast microscopy by numerical reconstruction of Fresnel off-axis holograms.
abstract: We present a digital method for holographic microscopy involving a CCD camera as a recording device. 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. For phase-contrast imaging the reconstruction method involves the computation of a digital replica of the reference wave. A digital method for the correction of the phase aberrations is presented. We present a detailed description of the reconstruction procedure and show that the transverse resolution is equal to the diffraction limit of the imaging system.
authors.affiliation: Institute of Applied Optics, Swiss Federal Institute of Technology, CH-1015 Lausanne, Switzerland. etienne.cuche@epfl.ch
authors.forename: E
authors.initials: E
authors.lastname: Cuche
authors.forename: P
authors.initials: P
authors.lastname: Marquet
authors.forename: C
authors.initials: C
authors.lastname: Depeursinge