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
Citations
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Journal ArticleDOI
Digital holographic microscopy with sequential off-axis illumination directions based on spatial light modulator
TL;DR: In this paper, a spatial light modulator (SLM) was used to generate time-sequential off-axis illumination directions in a digital holographic microscopy (DHM) system.
Proceedings ArticleDOI
Small reconstruction distance in convolution formalism
TL;DR: In this article, a simplified convolution formalism that is equivalent to the angular spectrum is proposed for digital holography, which is shown to be more efficient for small reconstruction distances.
Proceedings ArticleDOI
Technology for inspecting the end face of fiber connector based on digital micro-holography
TL;DR: In this paper, a new detection system based on holographic microscopy is designed and the method to reconstruct three-dimensional image of the end face is proposed, which can inspect the concentricity of fiber connector end face, the ellipticity of fiber core and the cladding and other parameters.
Book ChapterDOI
Module: Digital Holography
TL;DR: This article introduces the basics of digital holography including the process of storage and reconstruction, several application examples are mentioned and limitations due to discretization are discussed.
Patent
Microscope, method and computer program for obtaining quantitative phase images by means of digital holographic microscopy
Emilio Sánchez Ortiga,Manuel Martínez Corral,Ana Doblas Expósito,Genaro Saavedra Tortosa,Garcia Sucerquia Jorge Iván +4 more
TL;DR: In this article, a method and computer program for obtaining quantitative phase images by digital holographic microscopy is presented, which includes recording a hologram in the image plane of an optical telecentric afocal system.
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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