Abstract:
A method of enlarging an observation window from which a Computer Generated Hologram (CGH) may be viewed, including producing a CGH, and shifting a location of an exit pupil of an optical system producing the CGH. A method of increasing a viewing angle from which a Computer Generated Hologram (CGH) may be seen, including producing a plurality of instances of a CGH, projecting each one of the instances in a different direction so that a first exit pupil of a first instance is close to a second exit pupil of a second instance. An optical system including a plurality of exit pupils associated with a plurality of optical components, further including a light deflector for jittering a location of a first exit pupil so as to increase an overlap of the first exit pupil with a second exit pupil. Related apparatus and methods are also described.
Abstract:
The present invention relates to a system and method for high quality speckle-free phase-only computer-generated holographic image projection. The present invention more particularly relates to a holographic image display system comprising a spatial light modulator to phase modulate light from at least one light source configured to illuminate said spatial light modulator and to provide a phase hologram and projection optics to project said phase modulated light to generate an image formed by said displayed hologram onto an image plane.
Abstract:
Die vorliegende Erfindung betrifft eine Vorrichtung und ein Verfahren zur Berechnung und Kodierung von Hologrammdaten einer dreidimensionalen Szene in einen räumlichen Lichtmodulator (SLM) zur Darstellung von dreidimensionalen Szenen mit einem holographischen Display. Insbesondere betrifft die Erfindung auch eine Vorrichtung und ein Verfahren zur optimierten Berechnung von 2D-Subhologrammen (2D-SH) für Objektpunkte einer dreidimensionalen Szene und eine Pipeline zur Echtzeit-Berechnung von Hologrammen. Aufgabe der Erfindung ist es, die Berechnungszeit eines Hologramms zur Darstellung einer dreidimensionalen Szene zu verkürzen und/oder der Berechnungsaufwand eines solchen Hologramms gegenüber den aus dem Stand der Technik bekannten Verfahren zu reduzieren. Dies wird erreicht durch eine Vorrichtung und ein Verfahren, in dem ein 2D-Subhologramm (2D-SH) eines Objektpunktes, das Bildelemente (BE) des räumlichen Lichtmodulators (SLM) aufweist, ein halbes 1D-Subhologramm (1D-SH) enthält, wobei der Radius jedes Bildelements (BE) bestimmt ist und jedes Bildelement (BE) des 2D-Subhologramms (2D-SH) mindestens einem Bildelement (BE) des halben 1D-Subhologramms (1D-SH) mit gleichem oder ähnlichen Radius durch eine elektronische Schaltung fest zugeordnet ist, durch ein Verfahren zur Kodierung eines Hologramms, sowie durch eine Pipeline auf Basis von FPGA und/oder ASIC.
Abstract:
An optical data-storage system comprises a laser, an imaging optic, and associated computer logic. The laser is configured to emit a pulsed wavefront having uniform phase and polarization. The imaging optic is configured to modulate the phase and polarization of different portions of the wavefront by different amounts, and to diffract light from the different portions to a substrate with writeable optical properties. The logic is configured to receive data and to control modulation of the phase and polarization such that the light diffracted from the imaging optic writes the data to the substrate.
Abstract:
Die vorliegende Anmeldung betrifft ein computergeneriertes Hologramm für eine Oberfläche mit einer Unebenheit, durch welches beim Auslesen eine Rekonstruktion aus in einem Punktraster mit einem Rasterabstand angeordneten Lichtpunkten erzeugbar ist. Die der Anmeldung zugrunde liegende Erfindung ist dadurch gekennzeichnet, dass benachbarte Lichtpunkte einen Abstand voneinander haben, der mindestens zweimal so groß wie der Rasterabstand ist.
Abstract:
A method of enlarging an observation window (330) from which the reconstruction (35,305) from a Computer Generated Hologram (CGH) may be viewed, including reproducing a CGH, and shifting a location of an exit pupil or observation window (330a, 330b) of an optical system reproducing the CGH (10,15,20,25). A method of increasing a viewing angle from which the reconstruction (35,305,705) from a Computer Generated Hologram (CGH) may be seen, including producing a plurality of instances (714,715,716) of a CGH, projecting each one of the instances in a different direction so that a first exit pupil of a first instance is close to a second exit pupil of a second instance. An optical system including a plurality of exit pupils associated with a plurality of optical components, further including a light deflector for jittering a location of a first exit pupil so as to increase an overlap of the first exit pupil with a second exit pupil. Related apparatus and methods are also described.
Abstract:
A method for despeckling the image reproduced by a Computer Generated Hologram (CGH) including reproducing a CGH, and jittering a location of an exit pupil (33,250) of an optical system through which the CGH is imaged, relative to an observer's input pupil (31,255), so as to shift at least some speckles (32,260) out of the exit pupil. A method for despeckling a Computer Generated Holographic movie including computing a first modulation for a first holographic image in a holographic movie, and computing a second modulation for a second holographic image using an initial phase distribution used for calculating the first holographic image as an initial phase distribution used for calculating the second modulation. Related apparatus and methods are also described.
Abstract:
A method for despeckling a Computer Generated Hologram (CGH) including producing a CGH, and jittering a location of an exit pupil of an optical system through which the CGH is imaged, relative to an observer's input pupil, so as to shift at least some speckles out of the exit pupil. A method for despeckling a Computer Generated Holographic movie including computing a first modulation of a first holographic image in a holographic movie, and computing a second modulation of a second holographic image using an initial phase distribution used for calculating the first holographic image as an initial phase distribution used for calculating the second modulation. Related apparatus and methods are also described.