Thomson Licensing

Headplay (barbados), Inc.

Gabor Szarvas

Szabolcs Kautny

Krisztian Banko

Laszlo Domjan

Zoltan Karpati

Szabolcs Mike

Pal Koppa

Zokan Karpati

Svenja-Marei Kalisch

Erdei Gabor

An apparatus and a method for reading from and/or writing to holographic storage media using a coaxial arrangement of an object beam and one or more reference beams or a coaxial arrangement of a reconstructed object beam and one or more reference beams is proposed. A focus of the one or more reference beams within a holographic storage medium is shifted along the optical axis relative to a focus of the object beam or the reconstructed object beam.

Holographic storage system with improved beam overlap

The present invention relates to a lens system for an apparatus for reading from and/or writing to holographic storage media, and more specifically to a lens system optimized for an apparatus with a coaxial common aperture arrangement of an object beam and a reference beam. According to the invention, the lens system, which Fourier transforms an object beam and focuses a reference beam into a hologram layer of a holographic storage medium, and which focuses a servo beam onto a servo area of the hologram layer, includes a moving part acting on the object beam, the reference beam and the servo beam, and a fixed part acting only on the servo beam.

Lens system for common aperture holographic storage system

An apparatus for reading from and/or writing to transmission type holographic storage media is proposed, and more specifically a coaxial type apparatus for reading from and/or writing to transmission type holographic storage media with two or more reference beams, which has an improved Signal to Noise Ratio. The apparatus has a coaxial arrangement of two or more reference beams and an object beam or a reconstructed object beam. The reference beams are arranged on a circle around the object beam or the reconstructed object beam in a Fourier plane of the apparatus behind the holographic storage medium. A mirror is located in or close to this Fourier plane, which is designed such that it reflects the object beam or the reconstructed object beam without reflecting the reference beams.

Holographic storage system with reduced noise

An apparatus for reading from or writing to holographic storage media, and more specifically a common aperture type apparatus for reading from or writing to holographic storage media with multiple reference beams having a reduced noise. In a common aperture type apparatus for reading from or writing to a holographic storage medium using shift-multiplexing, with a coaxial arrangement of two or more reference beams and an object beam or a reconstructed object beam, the reference beams being arranged around the object beam or the reconstructed object beam in a storage layer of the holographic storage medium. Each of the reference beams is located essentially halfway between two adjacent central peaks of shift-multiplexed holograms.

Common aperture holographic storage system with reduced noise

The present invention relates to a coaxial type apparatus for reading from and/or writing to holographic storage media with multiple reference beams. The invention further relates to a beam generator and a filter for use in such an apparatus. According to the invention, in an apparatus for reading from and/or writing to a holographic storage medium, with a coaxial arrangement of three or more focused reference beams and an object beam or a reconstructed object beam, the foci of the focused reference beams are arranged on a circle around the object beam in a Fourier plane of the apparatus. A beam generator generates the three or more reference beams from an incoming reference beam. A filter low-pass filters the object beam and rotates the polarization of the three or more reference beams.

Holographic storage system with multiple reference beams

The present invention relates to a holographic storage system, and more specifically to a holographic storage system using a phase spatial light modulator. According to the invention a holographic storage system with a phase SLM for imprinting a 2-dimensional phase data pattern onto an object beam includes a common path interferometer for converting the phase data pattern of the object beam into an intensity data pattern.

Holographic storage system based on common path interferometry

The present invention relates to an apparatus for reading from and/or writing to holographic storage media, and more specifically to an apparatus for reading from and/or writing to holographic storage media having an apodization filter. According to the invention, an apparatus for reading from and/or writing to a holographic storage medium, with a collinear split aperture arrangement of a reference beam and an object beam or a reconstructed object beam, includes an apodization filter for the reference beam.

Holographic storage system with apodization filter

A head mounted display is disclosed that utilizes a single video display screen to transport images to both eyes. Multiple reflections are created by illuminating the display screen form a plurality of directions, or by illuminating the display screen with light beams of differing polarizations. The reflections of the display screen are focused in order to reduce the splitting volume and then redirected by a plurality of reflective surfaces located near the focal point of the display images. Different images may be sent to each eye of a user by interlacing multiple data streams for the display and linking each data stream with a specific illumination direction, or specific polarization.

Multiple imaging arrangements for head mounted displays

The invention describes a collinear optical head for a reflection-type holographic recording medium, which is capable of obtaining an increased capacity. The optical head presented here allows for high capacity by combining holographic multiplexing methods, based on a shift and/or phase-coded reference beam, and/or scanned reference beam and/or angle and/or confocal addressing techniques. The parallel reading method and the format of the holographic recording medium ensure high-speed data transfer. Combined multiplexing is implemented in the system by means of a confocal optical arrangement that reduces crosstalk between adjacent holograms by filtering out object beams unintentionally reconstructed from non-addressed holograms.

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Budapest, Hungary

Gabor Szarvas