Results 301 to 310 of about 27,513 (349)
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Applied Optics, 1996
Binary holograms have become more interesting since spatial light modulators, capable of binary phase modulation, were developed. The primary restriction of these dynamic elements when used with the Fourier transform is the symmetry of the hologram reconstruction.
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Binary holograms have become more interesting since spatial light modulators, capable of binary phase modulation, were developed. The primary restriction of these dynamic elements when used with the Fourier transform is the symmetry of the hologram reconstruction.
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Interferometry in Volume Holograms
Applied Optics, 1972An experimental demonstration is presented of interference fringes between two wavefronts recorded in a volume hologram by the double exposure technique and reconstructed by white light.
RIGHINI GC, RUSSO V, SOTTINI S
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Disk hologram made from a computer-generated hologram
Applied Optics, 2009We have been investigating disk holograms made from a computer-generated hologram (CGH). Since a general flat format hologram has a limited viewable area, we usually cannot see the other side of the reconstructed object. Therefore, we propose a computer-generated cylindrical hologram (CGCH) to obtain a hologram with a 360 deg viewable area.
Takeshi, Yamaguchi +2 more
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Digital recording and reconstruction of holograms in hologram interferometry and shearography
Applied Optics, 1994The fundamentals of digital recording and mathematical reconstruction of Fresnel holograms are described. The object is recorded in two different states, and the holograms are stored electronically with a charge-coupled-device detector. In the process of reconstruction the digitally sampled holograms are applied to the different coherent optical ...
U, Schnars, W P, Jüptner
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Is the Fastest MRI a Hologram?
Journal of Neuroimaging, 2014ABSTRACTReal‐time MR imaging might exert a profound influence on neuroscience in the future by enabling the direct visualization of neuronal interactions. At this time, however, all practical embodiments of MRI require at least some degree of gradient encoding, and this in turn sets a lower limit of about 100 ms for volume acquisition.
Michael, Hutchinson, Ulrich, Raff
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Requirements for hologram construction
Proceedings of the April 26-28, 1966, Spring joint computer conference on XX - AFIPS '66 (Spring), 1966Holography has in the last two years undergone a tremendous resurgence. The laser has contributed immeasurably to this, through the remarkable coherence of its light, which permits previously performed experiments to be carried out with relative ease, and in addition allows the performance of experiments which were hitherto hardly conceivable.
Emmett N. Leith, A. Kozma, J. Upatnieks
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Applied Optics, 1985
A cylindrical rainbow hologram is studied with a view to widening the horizontal viewing zone by using some unique mirror elements. The experimental result is compared with the calculation in reference to image blur and visual field restriction, both of which are caused by the fact that the rainbow hologram takes the shape of a cylinder. As a result, a
R, Sato, K, Murata
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A cylindrical rainbow hologram is studied with a view to widening the horizontal viewing zone by using some unique mirror elements. The experimental result is compared with the calculation in reference to image blur and visual field restriction, both of which are caused by the fact that the rainbow hologram takes the shape of a cylinder. As a result, a
R, Sato, K, Murata
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Proceedings of the 11th international conference on Intelligent user interfaces, 2006
There is a growing need for creating life-like virtual human simulations that can conduct a natural spoken dialog with a human student on a predefined subject. We present an overview of a spoken-dialog system that supports a person interacting with a full-size hologram-like virtual human character in an exhibition kiosk settings.
Anton Leuski +5 more
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There is a growing need for creating life-like virtual human simulations that can conduct a natural spoken dialog with a human student on a predefined subject. We present an overview of a spoken-dialog system that supports a person interacting with a full-size hologram-like virtual human character in an exhibition kiosk settings.
Anton Leuski +5 more
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Fresnel-Transform Representation of Holograms and Hologram Classification*
Journal of the Optical Society of America, 1966The transmittance of a hologram is described in terms of Fresnel transformation. This description facilitates the establishment of requirements for the hologram-recording material and it leads naturally to a classification of holograms made from plane transmitting objects illuminated by a point source.
John T. Winthrop, C. R. Worthington
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Acoustic Metagrating Holograms
Advanced MaterialsAbstractMetasurface holograms represent a common category of metasurface devices that utilize in‐plane phase gradients to shape wavefronts, forming holographic images through the application of the generalized Snell's law (GSL). While conventional metasurfaces focus solely on phase gradients, metagratings, which incorporate higher‐order wave ...
Hong‐Yu Zou +9 more
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