Results 281 to 290 of about 50,688 (337)
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Applied Optics, 1995
The Jones matrix is obtained for a film with a photoinduced anisotopy. The anisotropy of the film is considered to be caused by photoinduced anisotropic grains. On the basis of the Jones matrix we study Weigert's hologram of linearly polarized plane waves.
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The Jones matrix is obtained for a film with a photoinduced anisotopy. The anisotropy of the film is considered to be caused by photoinduced anisotropic grains. On the basis of the Jones matrix we study Weigert's hologram of linearly polarized plane waves.
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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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Error diffusion method with optimized weighting coefficients for binary hologram generation.
Applied Optics, 2019The error diffusion method can effectively reduce quality degradation by propagating thresholding errors to neighboring pixels in the conversion of a gray-scale hologram to a binary hologram.
Gao Yang +4 more
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Multiwavelength Multiplexing Hologram Designed Using Impedance Metasurfaces
IEEE Transactions on Antennas and Propagation, 2018We propose a method to generate microwave holograms using impedance metasurfaces for multiple simultaneous wavelengths. For recent impedance hologram designs in the microwave band, radiation from leaky waves can be controlled in the far field by creating
Yunbo Li +3 more
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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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Color digital hologram compression based on matching pursuit.
Applied Optics, 2018With the recent widespread interest for head-mounted displays applied to virtual or augmented reality, holography has been considered as an appealing technique for a revolutionary and natural 3D visualization system. However, due to the tremendous amount
Anas El Rhammad +4 more
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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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