Results 221 to 230 of about 3,939 (278)

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.
Wai-Hon Lee
exaly   +3 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.
A A Sawchuk
exaly   +3 more sources

Rotational control of computer generated holograms

open access: yesOptics Letters, 2017
We develop a basis for three-dimensional rotation of arbitrary light fields created by computer generated holograms. By adding an extra phase function into the kinoform, any light field or holographic image can be tilted in the focal plane with minimized distortion.
Preece, Daryl   +1 more
openaire   +5 more sources

Computer Generated Holograms for Optical Neural Networks

open access: yesApplied Intelligence, 2001
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Khosrow Kaikhah, F. Loochan
openaire   +3 more sources

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

Adaptive Computation of Computer-Generated Holograms

Advances in Imaging, 2008
Regular Effective Hologram Regions (EHRs) for object subspaces are pre-calculated. Object points are categorized online and the corresponding EHRs are used for hologram computation. The use of EHRs increases computational speed and benefits reconstruction quality.
Shuhong Xu   +4 more
openaire   +1 more source

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 holograms for geometric transformations

Applied Optics, 1984
Theory and experiments in the area of computer-generated holograms for geometric transformations are presented. Geometric transform holograms are divided into two categories: (1) those which have a continuous fringe structure, and (2) those which consist of a set of discrete subholograms.
J, Cederquist, A M, Tai
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

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