Results 241 to 250 of about 190,665 (333)
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Application of holographic interferometry in the analysis of stress states in a crack root area.
Applied Optics, 2020This paper deals with the visualization and analysis of interaction of a cutting wedge disintegrator with plastic at low loads. For exploratory research, a contactless optical holographic interferometry method was used, allowing a comprehensive picture ...
P. Frankovský +6 more
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Infrared holographic interferometry
Applied Optics, 1986Infrared (10.6-μm) dynamic holograms are obtained on a recording medium consisting of a thin oil film on a glass substrate. Reconstruction with visible light (0.63 μm) permits copying the initial hologram on a photographic plate. Any subsequent displacement of the object modifies the corresponding reconstructed wave at the recording medium, thereby ...
Jean Lapierre +3 more
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Journal of The Optical Society of America A-optics Image Science and Vision, 2019
This paper presents a comparative study of multi-look approaches for de-noising phase maps from digital holographic interferometry. A database of 160 simulated phase fringe patterns with eight different phase fringe patterns with fringe diversity was ...
S. Montrésor +4 more
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This paper presents a comparative study of multi-look approaches for de-noising phase maps from digital holographic interferometry. A database of 160 simulated phase fringe patterns with eight different phase fringe patterns with fringe diversity was ...
S. Montrésor +4 more
semanticscholar +1 more source
Applied Optics, 2019
High-speed measurement of temporally varying displacement derivatives of a deformed object is an important and challenging problem in precision metrology.
Ankur Vishnoi, G. Rajshekhar
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High-speed measurement of temporally varying displacement derivatives of a deformed object is an important and challenging problem in precision metrology.
Ankur Vishnoi, G. Rajshekhar
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Applied Optics, 2019
This paper proposes a method for reliable estimation of phase in digital holographic interferometry. The method is based on analyzing the interference field signal locally using a high-resolution signal subspace technique.
Ankur Vishnoi, J. Ramaiah, G. Rajshekhar
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This paper proposes a method for reliable estimation of phase in digital holographic interferometry. The method is based on analyzing the interference field signal locally using a high-resolution signal subspace technique.
Ankur Vishnoi, J. Ramaiah, G. Rajshekhar
semanticscholar +1 more source
Applied Optics, 2019
In digital holographic and speckle interferometry devoted to solid object displacement measurement, the reflecting properties of the object under study are of importance in designing the observation and laser illumination systems. In practical cases, the
M. Georges +4 more
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In digital holographic and speckle interferometry devoted to solid object displacement measurement, the reflecting properties of the object under study are of importance in designing the observation and laser illumination systems. In practical cases, the
M. Georges +4 more
semanticscholar +1 more source
Heterodyne Holographic Interferometry
SPIE Proceedings, 1986A write/readout system is described for double pulsed holograms. The write subsystem utilizes rapidly addressable, angularly resolved reference beams. The readout subsystem is based on heterodyne interferometry. Several readout configurations are discussed, each with advantages for various holograms.
D. M. Swain, R. J. Tansey
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In-line digital holographic interferometry
Applied Optics, 1998An optical system based on in-line digital holography for the evaluation of deformations is described. In-line holograms are recorded on a CCD chip. The problem of overlapping twin images typical for the in-line arrangement is solved by digital reconstruction and filtering of the unwanted wave fronts. Two separate interferograms of an object under test
Giancarlo Pedrini +3 more
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Applied Optics, 2016
In this paper, an application of digital holography for the measurement of surface deformations and the strain field to understand the shrinkage behavior of wood during convective drying is presented.
Manoj Kumar, C. Shakher
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In this paper, an application of digital holography for the measurement of surface deformations and the strain field to understand the shrinkage behavior of wood during convective drying is presented.
Manoj Kumar, C. Shakher
semanticscholar +1 more source