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
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
Phase Retrieval for Digital Holographic Microscopy With Defocused Holograms
TL;DR: In this article, a new phase retrieval technique in digital holographic microscopy (DHM) with three defocused holograms is proposed, given the defocusing distance, the phase distributions of tested specimen can be reconstructed with a simple algebraic equation.
Book ChapterDOI
Digital Holographic Microscopy
Tristan Colomb,Jonas Kühn +1 more
TL;DR: Digital holographic microscopy (DHM) is an interferometric technique that measures 3D topography from a single image, acquired in a few microseconds as discussed by the authors, and is ideal in certification metrology and for fast topographic imaging in many applications, for example quality control of surface texture and height and displacement of MEMS and MOEMS.
Journal ArticleDOI
Phase curvature compensation in digital holographic microscopy based on phase gradient fitting and optimization
TL;DR: A numerical method is proposed, in which the phase curvature is compensated for by subtracting a numerical phase mask from the distorted phase by fitting the phase gradient and then determining the mask parameters using a spectrum energy search.
Journal ArticleDOI
Study on Quantitative Phase Imaging by Dual-Wavelength Digital Holography Microscopy
TL;DR: In this article, a dual-wavelength digital holographic microscopy with premagnification is proposed to obtain the object surface measurements over the large gradient, and the quantitative phase images of specimens are captured in high precision by the processing of filtering and phase compensation.
Journal ArticleDOI
Unwrapping free Hilbert transform-based phase retrieval method in quantitative interferometric microscopy
TL;DR: Considering its fast speed and high accuracy in phase retrieval, it is believed that the unwrapping free HT-based phase retrieval method can be potentially applied in high throughput cellular observations and measurements.
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.
Related Papers (5)
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