Results 231 to 240 of about 12,991 (264)

Computer generated correlation holograms

2004 23rd IEEE Convention of Electrical and Electronics Engineers in Israel, 2004
A new method of synthesizing computer generated holograms has been developed and experimentally tested. The method has been implemented by an iterative optimization algorithm on a joint transform correlator. The proposed hologram is a combination of two separated sub-holograms, and its reconstructed image is obtained as a result of a spatial ...
D. Abookasis, J. Rosen
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Computer-Generated Cylindrical Hologram

Adaptive Optics: Analysis and Methods/Computational Optical Sensing and Imaging/Information Photonics/Signal Recovery and Synthesis Topical Meetings on CD-ROM, 2007
It is difficult to make a computer-generated cylindrical hologram due to the needs of high resolution output and huge computation. We propose a new approach to calculate the cylindrical hologram of the 3D object.
Takeshi Yamaguchi, Tomohiko Fujii, Hiroshi Yoshikawa   +2 more
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Computer generated cylindrical hologram

SPIE Proceedings, 2005
In this paper, we propose the new fast calculation method of computer generated cylindrical hologram and report experimental results of three-dimensional image reconstruction. Conventionally, it takes a huge amout of time to compute cylindrical hologram data, because it is based on a point-light object method.
Yuji Sakamoto, Masaaki Tobise
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Multichannel computer generated holograms

2000 Digest of the LEOS Summer Topical Meetings. Electronic-Enhanced Optics. Optical Sensing in Semiconductor Manufacturing. Electro-Optics in Space. Broadband Optical Networks (Cat. No.00TH8497), 2002
Detour phase computer generated holograms still remain under research due to their interesting characteristics. Many researchers have proposed several multiplexing methods, using detour holograms, where they have been able to perform an image reconstruction in various diffraction orders.
M.A. Araiza-Esquivel, S. Guel-Sandoval
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Computer-generated Binary Holograms

IBM Journal of Research and Development, 1969
Holograms synthesized by computer are used for constructing optical wavefronts from numerically specified objects. Elimination of the need for a physical object has made new applications possible, for example, three-dimensional computer output displays, synthetic prototypes for interferometric testing, and filters for various optical data processing ...
B. R. Brown, A. W. Lohmann
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Computer-generated image hologram

Chinese Optics Letters, 2011
We investigate the computer-generated hologram with full parallax and which can be reconstructed with white light. The object of the hologram is processed from three-dimensional computer graphics polygon data and has shaded surface for hidden surface removal. The optically reconstructed image from the printed hologram is evaluated.
Takeshi Yamaguchi Takeshi Yamaguchi, Hiroshi Yoshikawa Hiroshi Yoshikawa   +1 more
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Computer-generated microwave holograms

American Journal of Physics, 1980
Using the phasor method of superposition of waves, the intensity pattern from a system of microwave sources is calculated point by point on a plane corresponding to a film emulsion. The pattern is printed and directly converted to a hologram for 3-cm microwaves.
Charles W. Leming, Orestes Patterson Hastings   +1 more
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Double-multiplexed computer-generated holograms

OSA Annual Meeting, 1993
The most important element in an optical data processor is the complex spatial filter. Lohmann and Paris1 invented the detour phase method for binary encoding of a complex filter function. The reconstructed object is obtained along the first diffraction order.
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Stereoscopic Computer-Generated Hologram

Digital Holography and Three-Dimensional Imaging, 2016
Stereoscopic computer-generated hologram (SCGH) is able to provide accurate depth cues for three-dimensional display. We proposed to use look-up table instead of directly point-by-point computation to reduce the computation time of SCGH. The problem of artifacts arose in using lookup table is also discussed.
Chen-Yu Yu, Sung-Lin Lu, Jung-Ping Liu
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Computer-Generated Disk Hologram

Biomedical Optics, 2008
It is difficult to realize a computer-generated disk hologram due to the needs of high resolution output and huge computation. We have achieved to make the computer-generated disk hologram by using the fringe printer.
Takeshi Yamaguchi, Tomohiko Fujii, Hiroshi Yoshikawa   +2 more
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