Journal ArticleDOI
Studies of digital microscopic holography with applications to microstructure testing
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TLDR
The system is capable of imaging test microstructures with high resolution at sufficient working distances to permit good illumination of samples and achieves high imaging capacity and exhibits properties that are favorable for micromeasurement.Abstract:
We propose an in-line digital microscopic holography system for testing of microstructures. With the incorporation of a long-distance microscope with digital holography, the system is capable of imaging test microstructures with high resolution at sufficient working distances to permit good illumination of samples. The system, which was developed in an in-line configuration, achieves high imaging capacity and exhibits properties that are favorable for micromeasurement. We demonstrate the performance of the system with experiments to determine the displacement of a silicon microcantilever and with investigations of the microscopic resolution capability.read more
Citations
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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.
Journal ArticleDOI
Principles and techniques of digital holographic microscopy
TL;DR: Digital holography is an emerging field of new paradigm in general imaging applications as discussed by the authors, and a review of a subset of the research and development activities in digital holographic microscopy techniques and applications is presented.
Journal ArticleDOI
High-resolution quantitative phase-contrast microscopy by digital holography
TL;DR: Techniques of digital holography are improved in order to obtain high-resolution, high-fidelity images of quantitative phase-contrast microscopy, and the angular spectrum method of calculating holographic optical field is seen to have significant advantages including tight control of spurious noise components.
Journal ArticleDOI
Digital holographic microscope for measuring three-dimensional particle distributions and motions
TL;DR: It is demonstrated that digital holographic microscopy can resolve the locations of several thousand particles and can measure their motions and trajectories using cinematographic holography, and a sample trajectory and detailed morphological information of a free-swimming copepod nauplius are presented.
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
TL;DR: 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.
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 phase determination in hologram interferometry with use of digitally recorded holograms
TL;DR: In this paper, the phase determination in hologram interferometry is performed using a CCD target and phase estimation from the digitally sampled holograms, which are then used to calculate the phase of the interference phase.
Journal ArticleDOI
Digital recording and numerical reconstruction of lensless Fourier holograms in optical metrology
TL;DR: Advantages of the lensless Fourier holography setup for the reconstruction of digitally recorded holograms in holographic interferometry are presented and this very simple setup helps to achieve a maximum lateral resolution of the object under investigation.
Journal ArticleDOI
Suppression of the dc term in digital holography
TL;DR: In this article, the authors discuss the suppression of the dc term in digital holography and propose a solution to this problem, which they call suppression of dc-term in holographic data.
Proceedings ArticleDOI
Measuring shape and deformation of small objects using digital holography
TL;DR: In this article, a CCD matrix is used for deformation and shape analysis of microbeams with lateral extensions from 0.1 m to 0.001 m to examine their shape and their full three dimensional deformation under a given mechanical load.
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