Journal ArticleDOI
Compensation of the inherent wave front curvature in digital holographic coherent microscopy for quantitative phase-contrast imaging
Pietro Ferraro,Sergio De Nicola,Andrea Finizio,Giuseppe Coppola,Simonetta Grilli,Carlo Magro,Giovanni Pierattini +6 more
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TLDR
An approach is proposed for removing the wavefront curvature introduced by the microscope imaging objective in digital holography, which otherwise hinders the phase contrast imaging at reconstruction planes and it is shown that a correction effect can be obtained at all reconstruction planes.Abstract:
An approach is proposed for removing the wave front curvature introduced by the microscope imaging objective in digital holography, which otherwise hinders the phase contrast imaging at reconstruction planes. The unwanted curvature is compensated by evaluating a correcting wave front at the hologram plane with no need for knowledge of the optical parameters, focal length of the imaging lens, or distances in the setup. Most importantly it is shown that a correction effect can be obtained at all reconstruction planes. Three different methods have been applied to evaluate the correction wave front and the methods are discussed in detail. The proposed approach is demonstrated by applying digital holography as a method of coherent microscopy for imaging amplitude and phase contrast of microstructures.read more
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Book ChapterDOI
Digital holographic microscopy working with a partially spatial coherent source
Frank Dubois,Catherine Yourassowsky,Natacha Callens,Christophe Minetti,Patrick Queeckers,Thomas Podgorski,Anne-Nicole Brandenburger +6 more
TL;DR: In this paper, the authors investigated the use of partially spatial coherent illuminations for digital holographic microscopes (DHMs) working in transmission, where the sources are made from a spatially filtered LED or from decorrelated laser beam.
Journal ArticleDOI
Calibration-free quantitative phase imaging using data-driven aberration modeling
TL;DR: This work exploits deep learning techniques to model the physics of aberration in an imaging system by using a U-net-based deep neural network that learns a translation between an optical field with aberrations and an aberration-corrected field.
Journal ArticleDOI
Robust phase aberration compensation in digital holographic microscopy by self-extension of holograms
TL;DR: In this paper, a numerical robust phase aberration compensation method based on self-extension of holograms is proposed for digital holographic microscopy, which removes the fringes of the sample area in the hologram, then expands the fringe to fill the removed area of hologram by selfextension.
Journal ArticleDOI
Two-step phase shifting differential-recording digital holographic microscopy
TL;DR: Two-step phase-shifting differential-recording digital holographic microscopy (TPD-DH in microscopy) for phase imaging of microscopic transparent elements and a novel algorithm is proposed to reconstruct both amplitude and phase distributions of the object wave from the recorded interferograms.
Journal ArticleDOI
Thermo-mechanical characterization of surface-micromachined microheaters using in-line digital holography
TL;DR: In this paper, the application of lensless in-line digital holographic microscopy (DHM) to carry out thermo-mechanical characterization of microheaters fabricated through PolyMUMPs three-layer polysilicon surface micromachining process and subjected to a high thermal load is analyzed.
References
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Journal ArticleDOI
Phase-shifting digital holography
Ichirou Yamaguchi,Tong Zhang +1 more
TL;DR: A new method is proposed in which the distribution of complex amplitude at a plane is measured by phase-shifting interferometry and then Fresnel transformed by a digital computer, which can reconstruct an arbitrary cross section of a three-dimensional object with higher image quality and a wider viewing angle than from conventional digital holography using an off-axis configuration.
Journal ArticleDOI
Direct recording of holograms by a CCD target and numerical reconstruction.
Ulf Schnars,W. Jüptner +1 more
TL;DR: The principle of recording holograms directly on a CCD target is described and a real image of the object is reconstructed from the digitally sampled hologram by means of numerical methods.
Journal ArticleDOI
Digital holography for quantitative phase-contrast imaging.
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.
Journal ArticleDOI
Simultaneous amplitude-contrast and quantitative phase-contrast microscopy by numerical reconstruction of Fresnel off-axis holograms
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.
Journal ArticleDOI
Digital recording and numerical reconstruction of holograms
Ulf Schnars,Werner Jüptner +1 more
TL;DR: The principles and major applications of digital recording and numerical reconstruction of holograms (digital holography) are described, which are applied to measure shape and surface deformation of opaque bodies and refractive index fields within transparent media.
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Simultaneous amplitude-contrast and quantitative phase-contrast microscopy by numerical reconstruction of Fresnel off-axis holograms
Digital holography for quantitative phase-contrast imaging.
Direct recording of holograms by a CCD target and numerical reconstruction.
Ulf Schnars,W. Jüptner +1 more