Results 251 to 260 of about 190,665 (333)
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Color holographic interferometry
Proceedings of SPIE, 1995Holographic interferometry is a well established technique for accurate measurements of mechanical displacements. In cases where no prior information is available on the lcoations of zero displacement, there has not been a method which allows one to determine the location of the zeroth order interferometric fringe.
Hans I. Bjelkhagen +2 more
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Multiwavelength rainbow holographic interferometry
Applied Optics, 1979Although the two-step rainbow holographic process of Benton [S. A. Benton, J. Opt. Soc. Am. 50, (1969)] offers a significant improvement in holographic displays, its scientific applications are somewhat limited. It is primarily due to the awkardness of the two-step process. We have demonstrated [H. and F. T. S. Yu, Opt. Lett.
Anthony M. Tai +2 more
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Holographic interferometry of cerebral pulsations
Surgical Neurology, 2005Holographic interferometry is a noninvasive method used to analyze the mechanical displacement affecting an object undergoing deformation. This technique has been primarily applied to inanimate entities owing to the difficulty in producing stress forces in living subjects.
Timothy E. Schmidt +3 more
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Holographic polarization interferometry [PDF]
Pure and Applied Optics: Journal of the European Optical Society Part A, 1996 A new approach based on the combination of the advantages of holographic interferometry with those of polarization measurements is developed. This approach gives the possibility to apply the polarization method to the investigation of objects which fully depolarize the illuminating light wave.
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Acoustical Holographic Interferometry
Japanese Journal of Applied Physics, 1975Experiments on acoustical holographic interferometry were performed by scanned acoustical holography with 3 MHz sound waves. Interferometric imaging of tilted objects was performed and clear fringes corresponding to the height difference in the objects were observed in double-exposure interferometry and in two-hologram interferometry.
Katsumichi Suzuki +1 more
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Optics Letters, 2017
This Letter presents an alternative approach for image refocusing in digital Fresnel holography. In the literature, a large majority of reported focus detection criteria is based on amplitude contrast or phase contrast.
P. Picart +3 more
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This Letter presents an alternative approach for image refocusing in digital Fresnel holography. In the literature, a large majority of reported focus detection criteria is based on amplitude contrast or phase contrast.
P. Picart +3 more
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Video Holographic Interferometry
SPIE Proceedings, 1987A description is given of the history and principal developers of the technique of T.V. Holographic Interferometry. The principles of the method are next outlined and recent work involving the use of pulsed holographic lasers combined with a C.O.D. video holographic interferometer is described as applied to the study of automobile disk brakes rotor ...
W. F. Fagan, R. W.T. Preater
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Particle-filter-based phase estimation in digital holographic interferometry.
Journal of The Optical Society of America A-optics Image Science and Vision, 2016In this paper, we propose a particle-filter-based technique for the analysis of a reconstructed interference field. The particle filter and its variants are well proven as tracking filters in non-Gaussian and nonlinear situations. We propose to apply the
Rahul G. Waghmare +4 more
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Analog Holography, Holographic Interferometry, and Phase-Shifting Holographic Interferometry
2015Because the objective of holography is to perform phase retrieval from a recorded hologram, this chapter discusses how this can be achieved using analog holographic techniques. Conventional analog holography entails physical re-illumination of the hologram of the object with a reading beam and finding the 3D real or virtual image.
Rola Aylo +2 more
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