Abstract:
A matrix of displays to display binary information and modulate an object beam (125) into sub-object beams with the binary information. A matrix of microlenses (202) focuses the sub-object beams (203) onto a recording plate (205). The sub-object beams intersect a reference beam (120) to create holograms on a matrix of points of the recording plate (205).
Abstract:
This invention aims to reduce and preferably to cancel the carrier collection limit effect in order to considerably encrease the conversion efficiency. This improvement is achieved by a suitable modification of the amorphized layer thickness or even by discontinuities separating amorphizing beams or amorphized nanopellets.
Abstract:
A first holographic data storage device has a first set of holograms stored thereon. A second holographic data storage device has a second set of holograms stored thereon. An opaque layer is disposed between and attached to one side of the first and the second holographic data storage devices. In the case of double reflective diffractive recording, the opaque layer is not necessary.
Abstract:
A master memory device that stores a plurality of pages of information. An unexposed memory device (190) is adjacent to the master memory device (180). The unexposed memory device and the master memory device are separated by a gap. An aperture unit (130) is disposed in the gap. The aperture has a plurality of aperture openings. Each opening corresponds, in size, to an individual page constitutes of a column with specific multiplexing angles of memory in the master memory device. The aperture unit is located across a face of the master memory device such that the openings correspond to selected ones of the pages of information. A light source (120) generates a beam that transfers memory data from the master memory device to the unexposed memory device.
Abstract:
A petabyte diffractive storage system stores information on a diffractive storage tape. A light component generates a large reference beam to cover the plurality of points of the diffractive storage tape so as to simultaneously interfere with the plurality of object beams creating a plurality of packets of information at the plurality of points. Also disclosed is a terabyte diffractive storage that system reads information from a diffractice storage disk having a plurality of tracks. A plurality of micro-mirrors directs the read beam to one of said plurality of tracks.
Abstract:
La partie sensible (2) du capteur de chocs (1) comprend un support déformable (4), appliqué sur la structure à surveiller et recevant les chocs directement ou par l'intermédiaire d'une couche tampon. Ce support présente un réseau de perforations traversantes, dans lesquelles une fibre optique (S) est enfilée successivement à la façon d'un tissage, créant ainsi des courbures, réparties sur sa longueur et séparées par des zones neutres (8). La partie fonctionnelle (3) du capteur comprend une source lumineuse reliée à l'extrémité d'entrée (10) de la fibre optique, un détecteur de mesure placé à son extrémité de sortie (12) et un ensemble de traitement des signaux (13) permettant de détecter un choc et de mesurer son intensité, mais également de déterminer l'amplitude de la déformation engendrée par le choc. Cette invention intéresse les fabricants de capteurs et de supports soLa partie sensible (2) du capteur de chocs (1) comprend un support déformable (4), appliqué sur la structure à surveiller et recevant les chocs directement ou par l'intermédiaire d'une couche tampon. Ce support présente un réseau de perforations traversantes, dans lesquelles une fibre optique (6) est enfilée successivement à la façon d'un tissage, créant ainsi des courbures, réparties sur sa longueur et séparées par des zones neutres (8). La partie fonctionnelle (3) du capteur comprend une source lumineuse reliée à l'extrémité d'entrée (10) de la fibre optique, un détecteur de mesure placé à son extrémité de sortie (12) et un ensemble de traitement des signaux (13) permettant de détecter un choc et de mesurer son intensité, mais également de déterminer l'amplitude de la déformation engendrée par le choc.
Abstract:
The invention relates to an optical sensor (1) which can be used to detect, unambiguously and with high resolution, the absolute angular position over a full revolution, the number of revolutions performed and the direction of rotation of the rotating object independently of the speed of rotation. The inventive sensor comprises: a polarised light source (2) which illuminates a polariser (3) that rotates proportionally to the rotation of the object to be analysed, a detector (19) which captures the intensity of the beam passing through the polariser, and a signal analyser assembly (20). The invention also comprises a means for resolving indeterminacies (23) by generating a second measurement signal that is phase shifted in relation to the first signal, whereby said second phase-shifted signal can coexist with the first signal or replace same periodically. The invention is of interest to manufacturers and users of angular position sensors.
Abstract:
The present invention comprises an apparatus and method for recording information on a multi-layer diffractive optics memory to extend storage capacity. A composite mirror device comprises a plurality of sets of mirror elements. Each one of the mirror elements of the sets is configured to direct a reference beam to a point of the multi-layer memory at one of a plurality of angles. A plurality of planes is associated with the plurality of sets. There is one plane per set, each plane being defined for each of the sets of mirror elements so that the paths formed from the mirror elements of the set to the point lie in the plane. Each of the planes is separated from its neighbor by an angle selected to avoid crosstalk.
Abstract:
A parallel recording of diffractive storage system is provided. The recorded information is cellular for its designation. A laser beam is data modulated through a single reference beam and a plurality of object beams positioned at different angles. These object beams intersect the reference beam within a recording medium to form a plurality of data loaded pattern simultaneously.
Abstract:
A photonics data storage system according to the present invention is described comprising a storage material, a data recording/storage apparatus for recording information in this storage material, and an addressing/data reading apparatus for reading the recorded information from this storage material. The photonics data storage system encodes data in the storage medium by an interferometric recording process. The storage medium is composed of a polypeptide material. The polypeptide material comprises a solution of chromium-doped collagen, in which solution α and β chains are predominantly present in proportions such that an α/β ratio is greater than 1.