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
Analysis of potential distortions corresponding to the hologram printed by a holographic wave-front printer
TL;DR: A diffracted wavefield reconstructed from a quantitatively distorted hologram is theoretically analyzed and contributed to generate the distorted reconstruction plane, such as a focal cloud plane and a convergence plane, depending on the types of distortion.
Proceedings ArticleDOI
Micro-structure imaging and measurement based on digital holographic system
TL;DR: A method to eliminate the linear term of the sheared phase map is proposed and the computer simulations, which are based on the lensless Fourier transform holographic system, demonstrate the validity of the proposed method.
Book ChapterDOI
Combining Digital Holographic Microscopy with Microfluidics: A New Tool in Biotechnology
Lisa Miccio,Pasquale Memmolo,Francesco Merola,Melania Paturzo,Roberto Puglisi,Donatella Balduzzi,Andrea Galli,Pietro Ferraro +7 more
TL;DR: In this paper, digital holography (DH) microscopy is used for specimen analysis in the framework of non-invasive microscopy applied to microfluidics, which can be useful tools in case of in vitro cells or microparticles flowing in a channel or standing in a chamber.
Proceedings ArticleDOI
Combining lateral shear interferometry with digital holography for quantitative phase microscopy
Pietro Ferraro,Domenico Alfieri,S. De Nicola,L. De Petrocellis,Andrea Finizio,Giovanni Pierattini +5 more
TL;DR: In this article, the concept of Lateral Shear Interferometry (LSI) with Digital Holography (DHI) is combined with quantitative phase microscopy (QPM) for investigation in different field of applications.
Book ChapterDOI
Characterization of Micro-lenslet Array Using Digital Holographic Interferometric Microscope
Varun Kumar,Chandra Shakher +1 more
TL;DR: In this paper, a digital holographic interferometric microscope (DHIM) with Fresnel reconstruction method is demonstrated for the characterization of micro-lenslet array, which is used to measure diameter, sag height, radius of curvature (ROC), focal length, and shape of microlenses.
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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