Results 221 to 230 of about 12,678 (263)

Computer-generated rainbow holograms

Applied Optics, 1984
A technique is described for synthetic generation of rainbow holograms. Minimization of the space–bandwidth product is discussed considering the reconstruction geometry. It is shown how the flexibility of computer-generated holography can be used to make compromises and solve particular problems peculiar to display applications. Artificially introduced
D, Leseberg, O, Bryngdahl
openaire   +2 more sources

Computer-generated double-phase holograms

Applied Optics, 1978
A method of computer generating binary holograms based on the decomposition of a complex value into two phase quantities is described. Each Fourier transform cell is divided into subcells, and phase quantities are encoded by the detour phase technique. Noise due to the displacement of the subcells and the phase coding is discussed.
C K, Hsueh, A A, Sawchuk
openaire   +2 more sources

Polarization-selective computer-generated holograms

Optics Letters, 1993
We demonstrate polarization-selective computer-generated holograms with independent phase profiles for the two orthogonal linear polarizations. The holograms are made of two surface-relief-etched birefringent substrates joined face to face. We describe their design and fabrication and present experimental results for dual binaryphase computer-generated
J E, Ford   +3 more
openaire   +2 more sources

Binary computer-generated holograms

Applied Optics, 1979
Binary computer-generated holograms are similar to interferograms with fringe patterns hardclipped by a photographic process. Therefore the fringe locations in the binary hologram can be determined by solving a grating equation. However, there are two difficulties in using this approach to make binary Fourier transform holograms.
openaire   +2 more sources

Disk hologram made from a computer-generated hologram

Applied Optics, 2009
We 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
openaire   +2 more sources

Computer Generated Rainbow Hologram

Optical Review, 1999
The rainbow hologram is very practical to display 3-D images because it can be reconstructed with white light. We propose a simplified model to calculate the computer generated rainbow hologram quickly. In the proposed method, we can simply generate the final hologram from intermediate data, whose total number of samples can be less than one tenth of ...
Hiroshi Yoshikawa, Hiroyuki Taniguchi
openaire   +1 more source

New computer-generated hologram

SPIE Proceedings, 1997
A method for calculating in real time, the transmission function of a computer generated hologram (CGH) for beam shaping, is described. This method is based on the well known phase contrast method (PCM) in which phase distributions of an object are transformed to intensity distributions.
Yoel S. Arieli   +2 more
openaire   +1 more source

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
openaire   +1 more source

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