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1. CA2662994 - METHOD AND DEVICE FOR ENCODING COMPUTER-GENERATED HOLOGRAMS IN PIXELATED LIGHT MODULATORS

Amt
Kanada
Aktenzeichen/Anmeldenummer 2662994
Anmeldedatum 27.08.2007
Veröffentlichungsnummer 2662994
Veröffentlichungsdatum 13.03.2008
Veröffentlichungsart A1
IPC
G03H 1/08
GSektion G Physik
03Fotografie; Kinematografie; vergleichbare Techniken unter Verwendung von nicht optischen Wellen; Elektrografie; Holografie
HHolografische Verfahren oder Vorrichtungen
1Holografische Verfahren oder Vorrichtungen, die sichtbares Licht, infrarote oder ultraviolette Wellen zur Erzeugung von Hologrammen oder von Bildern aus den Hologrammen verwenden; besondere Einzelheiten dazu
04Verfahren oder Vorrichtungen zur Herstellung von Hologrammen
08Synthetische Herstellung von Hologrammen
G03H 1/22
GSektion G Physik
03Fotografie; Kinematografie; vergleichbare Techniken unter Verwendung von nicht optischen Wellen; Elektrografie; Holografie
HHolografische Verfahren oder Vorrichtungen
1Holografische Verfahren oder Vorrichtungen, die sichtbares Licht, infrarote oder ultraviolette Wellen zur Erzeugung von Hologrammen oder von Bildern aus den Hologrammen verwenden; besondere Einzelheiten dazu
22Verfahren oder Vorrichtungen zur Gewinnung eines optischen Bildes aus Hologrammen
CPC
G03H 1/02
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
HHOLOGRAPHIC PROCESSES OR APPARATUS
1Holographic processes or apparatus using light, infra-red or ultra-violet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
02Details ; of features involved during the holographic process; Replication of holograms without interference recording
G03H 1/0808
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
HHOLOGRAPHIC PROCESSES OR APPARATUS
1Holographic processes or apparatus using light, infra-red or ultra-violet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
04Processes or apparatus for producing holograms
08Synthesising holograms, ; i.e. holograms synthesized from objects or objects from holograms
0808Methods of numerical synthesis, e.g. coherent ray tracing [CRT], diffraction specific
G03H 1/2294
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
HHOLOGRAPHIC PROCESSES OR APPARATUS
1Holographic processes or apparatus using light, infra-red or ultra-violet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
22Processes or apparatus for obtaining an optical image from holograms
2294Addressing the hologram to an active spatial light modulator
G03H 2001/0224
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
HHOLOGRAPHIC PROCESSES OR APPARATUS
1Holographic processes or apparatus using light, infra-red or ultra-violet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
02Details ; of features involved during the holographic process; Replication of holograms without interference recording
0208Individual components other than the hologram
0224Active addressable light modulator, i.e. Spatial Light Modulator [SLM]
G03H 2210/441
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
HHOLOGRAPHIC PROCESSES OR APPARATUS
2210Object characteristics
40Synthetic representation, i.e. digital or optical object decomposition
44Digital representation
441Numerical processing applied to the object data other than numerical propagation
G03H 2210/454
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
HHOLOGRAPHIC PROCESSES OR APPARATUS
2210Object characteristics
40Synthetic representation, i.e. digital or optical object decomposition
45Representation of the decomposed object
454into planes
Anmelder SEEREAL TECHNOLOGIES S.A.
Erfinder LEISTER, NORBERT
Prioritätsdaten 102006042467 09.09.2006 DE
Titel
(EN) METHOD AND DEVICE FOR ENCODING COMPUTER-GENERATED HOLOGRAMS IN PIXELATED LIGHT MODULATORS
(FR) PROCEDE ET DISPOSITIF DE CODAGE D'HOLOGRAMMES GENERES PAR ORDINATEUR EN MODULATEURS DE LUMIERE A PIXELS
Zusammenfassung
(EN) The object is to largely eliminate the errors which arise in the reconstruction of a hologram, calculated point by point, as a result of the encoding of said hologram into pixels of finite extent. The invention achieves the object by means of a method in which the common wavefront calculated from the object sectional planes (6, 7, 8) is multiplied by the inverse transform of the pixel shape and pixel transparency in the viewer's window (11) before the wavefront modified by the multiplication is transformed to the hologram plane (14) and encoded as an amplitude and/or phase distribution of the hologram in the pixels of the light modulator (9, 91). This method is implemented in a corresponding apparatus which contains an additional memory unit for providing a Fourier transform or its inverse Fourier transform and also a multiplication unit.