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Deformation measurement by digital holographic interferometry
SPIE Proceedings, 2003Deformation measurement of a cantilever based on digital holographic interferometry is presented. The digital holograms of the cantilever before and after deformation are obtained by use of phase-shifting technique. By using the phase-shifting digital holography, the object wave information without zeroth order diffraction wave can be extracted.
Takanori Nomura +4 more
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High speed digital holographic interferometry
SPIE Proceedings, 2006A system based on digital holographic interferometry for the measurement of vibrations is presented. A high power continuous laser (10 W) and a high speed CCD camera (1 kHz) are used. Hundreds of holograms of an object that has been subjected to dynamic deformation are recorded.
Wolfgang Osten +2 more
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Digital holographic interferometry for the nanodisplacement measurement
2017 Progress In Electromagnetics Research Symposium - Spring (PIERS), 2017The sensitivity of digital holographic interferometry methods for a surface nanodisplacement measurement is represented. The effect of hardware digitalization parameters on the sensitivity of digital holographic measurements is considered. The investigation of surface-acoustic waves was carried out by digital holographic interferometry technique in ...
Andrey Y. Zyubin +4 more
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Displacement Determination by Digital Holographic Interferometry
AIP Conference Proceedings, 2010Digital Holographic Interferometry is a useful technique for measuring the deformation or displacement of the surface of an object by recording at least two speckle patterns, one before and one after the object is deformed. Holographic interferometry utilizes interference between the speckled image of an object illuminated by a laser and a reference ...
Lotfi Abdelhakim +3 more
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Holographic interferometry and digital fringe processing
Journal of Physics D: Applied Physics, 1987Outlines the holographic interferometry techniques used to visualise turbulent forced convective heat transfer from a heated plate located in a wind tunnel. The automatic processing of the fringe fields produced by such methods is then discussed with regard to showing how quantitative data can be obtained quickly and efficiently from them.
J C Hunter, M. W. Collins
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Digital Holographic Interferometry (DHI)
2014As we saw in Chap. 2, a conventional holographic interferogram recorded on photographic film is generated by superposition of two waves, which are scattered from an object in two different states of loading or excitation.
Ulf Schnars +3 more
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Digital Holographic Interferometry of Translucent Objects
Biomedical Optics and 3-D Imaging, 2010We use a variation of digital holographic interferometry, viz., an inverse reconstruction method, to determine the 3-D shape and deformation of translucent objects such as water droplets.
N. Kukhtarev +3 more
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Compressive sensing for digital holographic interferometry
SPIE Proceedings, 2014Compressive sensing (CS) is one of the latest signal processing techniques, which facilitates to reconstruct a complete signal from a small number of randomly chosen signal samples. It has been shown that CS can be applied successfully in digital holography.
B. Deepan, C. J. Tay, C. Quan
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Tomographic high-speed digital holographic interferometry [PDF]
Measurement Science and Technology, 1995 A dual-reference beam, plane-wave illumination, holographic interferometry set-up has been developed which can operate in a rapid double-pulse mode and which provides multiple simultaneous views of a compressible flow field. It is intended for the quantitative study of the instantaneous density distribution in a 3D (turbulent) flow field, as well as ...
B Timmerman, D W Watt
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Digital Holographic Interferometry and Speckle Correlation
AIP Conference Proceedings, 2010Relations and combinations between holographic interferometry and speckle correlation in contouring by phase‐shifting digital holography are discussed. Three‐dimensional distributions of correlations of the complex amplitudes and intensities before and after the laser wavelength shift are calculated in numerical simulations where a rough surface is ...
Ichirou Yamaguchi +2 more
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