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
Spatial multiplexing and autofocus in holographic contouring for inspection of micro-parts.
TL;DR: The method is used to reconstruct the 3D geometrical shape of a cold drawing micro cup using single-shot two-wavelength contouring digital holographic microscopy and an object side telecentric microscope objective is used for overcoming the image scaling distortions caused by a conventional microscope objective.
Journal ArticleDOI
Low-pass filtering compensation in common-path digital holographic microscopy
Jie Dong,Ali K. Yetisen,Xingchen Dong,Franziska Pöller,Martin Jakobi,Zhanwei Liu,Félix Salazar Bloise,Alexander W. Koch +7 more
TL;DR: Low-pass filtering compensation (LPFC) operates without the need for fitting procedures, iterative steps, or prior knowledge of the optical parameters, which substantially simplifies the process of phase compensation in quantitative phase imaging.
Journal ArticleDOI
Sampling moiré method: a tool for sensing quadratic phase distortion and its correction for accurate quantitative phase microscopy
TL;DR: The proposed scheme is successfully demonstrated to remove the quadratic phase aberration caused due to wavefront mismatch from an USAF resolution target and the biological tissue samples.
Proceedings ArticleDOI
Probing orientation and rotation of red blood cells in optical tweezers by digital holographic microscopy
TL;DR: In this paper, the authors used digital holographic microscopy (DHM) to confirm the orientation of trapped red blood cells (RBCs) under hypertonic conditions.
Journal ArticleDOI
High numerical aperture holographic microscopy reconstruction with extended z range
TL;DR: In this paper, a phase mask that transforms the optical elements of the holographic setup into an afocal device is applied in the camera plane, and the reconstruction is then made by the angular spectrum method.
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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