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Digital holographic interferometry for investigations in biomechanics
SPIE Proceedings, 2005In the first part of our paper, a method based on digital holographic interferometry and its application to measurements of the elastic properties of the bone is presented. Samples of bone were loaded and deformed and a large number of interferograms (digital holograms) were recorded over a short period of time.
Hans J. Tiziani +4 more
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Digital-holographic interferometry with an image-intensifier system
Applied Optics, 2002A method for recording digital holograms on an image intensifier coupled with a CCD sensor is presented. The advantage of the image intensifier is that it can be gated (electronic shutter action produced by controlling of the image intensifier's photocathode voltage). This allows us to record holograms with a short exposure time.
Igor Alexeenko +2 more
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Speckle- and Digital Holographic Interferometry (A Comparison)
1996There exists many types of optical systems which allow deformation and shape measurements which are based on interferometry. Different names are used: holographic interferometry, digital holographic interferometry, direct holography, speckle correlation interferometry, electronic speckle interferometry (ESPI), TV-holography, shearing interferometry ...
H. J. Tiziani, G. Pedrini, Yunlu Zou
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Measurements of the tympanic membrane with digital holographic interferometry
SPIE Proceedings, 2011In this paper a digital holographic interferometry (DHI) system with three object-illumination beams is used for the first time to detect and measure micrometer deformations on the surface of a tympanic membrane. Using this optical setup allows all three object displacement components x, y, and z, to be independently calculated.
F. Mendoza Santoyo +2 more
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Digital holographic interferometry in flow research
Optics Communications, 1990Abstract A plane-wave holographic interferometric set-up for the quantitative determination of the density distribution existing in the flow field around arbitrarily shaped objects using digital image-processing is presented. By utilizing two reference/reconstruction beams, generated by a slightly misaligned Twyman-Green (T-G) interferometer in the ...
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Noncontacting Measurement of Distortion by Digital Holographic Interferometry
Materialwissenschaft und Werkstofftechnik, 2006Digital holographic interferometry is a coherent-optical method for noncontacting measurement of full field deformations in the micrometer-range. While deformations in the range of the wavelength of the used laser-light are determined by comparison of the phases of the wave fields reconstructed from the recorded holograms, for larger deformations the ...
Jan P. Müller +3 more
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Digital holographic interferometry as a tool to obtain shapes
SPIE Proceedings, 2015This work describes a new method to obtain shapes on surfaces based on digital holographic interferometry (DHI). Research has been reported with different methods, such as fringe projection. DHI, being a full-field technique, decreases the number of images to capture and the processing time, besides having a high resolution.
Ubaldo Uribe López +2 more
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High-speed digital holographic interferometry for vibration measurement
Applied Optics, 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 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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Stroboscopic holographic interferometry: Application of digital techniques
Optics Communications, 1986Stroboscopic holographic interferometry is a very powerful tool for study of vibrating objects. It is shown how its capabilities can be extended by applying digital techniques to make real-time measurements of the optical path differences at a uniformly spaced array of points covering the interference pattern.
P. Hariharan, Bob F. Oreb
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Research of dental implants by digital holographic interferometry
2019 International Conference on Information and Telecommunication Technologies and Radio Electronics (UkrMiCo), 2019The method of measuring axial deformations of dental implants with the use of digital holographic interferometry is developed. The optical scheme of registration of digital holograms of diffuse objects is developed and optimized. Created special software for recording, processing and reproduction of digital holographic interferograms. Special equipment
Adriana Barylyak +5 more
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