Patent application number | Description | Published |
20090021815 | Method and apparatus for phase-encoded homogenized fourier transform holographic data storage and recovery - An apparatus for writing and reading holograms, comprising a spatial light modulator (SLM) operable in phase mode, having a plurality of pixels for generating an object beam that overlaps with a reference beam; a holographic recording medium (HRM) in the path of the object beam; and a first lens element disposed in the path of the object beam between the SLM and the HRM; wherein the HRM is disposed at or near the Fourier transform plane of the first lens element. | 01-22-2009 |
20090042105 | Sensitizer dyes for photoacid generating systems - Photosensitizing dyes are often used in conjunction with a photoacid generator in holographic recording media. Conventional photosensitizing dyes typically are limited by having an appreciable absorption of light when used in a sufficient concentration, such that the intensity of light decreases significantly with penetration into a recording medium. The present invention discloses a number of new 5-alkynyl substituted napthacene photosensitizing dyes that have low extinction coefficients coupled with good sensitizing properties, such that the problems associated with the photosensitizing dyes absorbing light are significantly reduced. | 02-12-2009 |
20090046337 | Method of recording and reading angle-multiplexed holograms that compensates for media shrinkage - A method of recording a plurality of holographic images in a holographic media, comprising recording a sequence of multiplexed holograms in a selected storage location in the holographic recording media, each hologram having a respective interbeam angle. The interbeam angle increases for each subsequently recorded hologram to compensate for a variable shrinkage of the holographic media during recording. The multiplexed holograms recorded at the selected storage location are partially or fully overlapped. During reading the recorded holograms, a reference beam is directed at a selected storage location in the holographic recording media at a sequence of incidence angles, each incidence angle being adjusted by a respective adjustment angle. The adjustment angles can be substantially equal. | 02-19-2009 |
20090147653 | Holographic content search engine for rapid information retrieval - An apparatus for information retrieval comprising a first holographic drive, configured to content-search holographic recording media (HRM), and to generate an address, and at least one data storage system, configured to receive the address generated by the first holographic drive and operable to retrieve information from said data storage system corresponding to the address received from said first holographic drive. | 06-11-2009 |
20090168129 | Replication of data to holographic medium using holographic master media - An apparatus for replicating holographically recorded data, comprising a holographic master media having holographically recorded data thereon; a holographic copy media; a light source for generating a master reference beam and a copy reference beam, coherent with the first object beam, the first master reference beam incident on the holographic master media, the holographic master media diffracting the master reference beam to provide a first object beam; the copy reference beam incident on the holographic copy media; and a first optical relay system, disposed between the holographic master media and the holographic copy media, for relaying the first object beam from the holographic master media to the holographic copy media, the holographic copy media recording an interference pattern between the first object beam and the copy reference beam, thereby replicating at least a portion of holographically recorded data. | 07-02-2009 |
20090201779 | Novel reading inhibit agents - Disclosed is an optical disk, card or media which comprises: a) a plurality of data structures that are readable by the interrogating beam of light; and b) a composition on or in the optical disk, card or media disposed so that when the optical disk, card or media is used in the optical read-out system, the interrogating beam of light passes through the composition before or after contacting some or all of the data structures. The composition comprises a polymeric matrix with an organometallic complex dissolved therein or with metal, transition metal, metal oxide or transition metal oxide nanoparticles uniformly dispersed therein. The composition is substantially transparent to the interrogating beam and/or is substantially colorless. Alternatively, the composition comprises a solid polymeric matrix with an olefinic compound dissolved or uniformly dispersed therein wherein double bond in the olefinic compound undergoes oxidative cleavage promoted by a transition metal catalyst and a thiophenol or a catalytic amount of a thiyl radical and wherein the composition is substantially transparent to the interrogating beam and/or is substantially colorless. | 08-13-2009 |
20090202919 | Apparatus and methods for threshold control of photopolymerization for holographic data storage using at least two wavelengths - A polymerizable media, including holographic recording media, and methods of use of the same. The media comprises at least one monomer or oligomer which undergoes polymerization to form a polymer; a compound, which absorbs actinic radiation of a first wavelength and forms a sensitizer which absorbs actinic radiation of a second wavelength; and an initiator, which, in combination with the sensitizer, initiates polymerization of the at least one monomer or oligomer when said sensitizer is exposed to actinic radiation of the second wavelength. | 08-13-2009 |
20090325079 | Data storage medium comprising colloidal metal and preparation process thereof - Disclosed is a photopolymerizable holographic recording medium for data storage that comprises colloidal metal, and which exhibits a threshold for a second stage polymerization which is substantially insensitive to the light used for both forming holograms and interrogating the medium during servo and/or read events. Also disclosed is a method of preparing said photopolymerizable holographic recording medium. Also disclosed is a method for preparing a colloidal without additives in a viscous medium. | 12-31-2009 |
20100014138 | High Areal Density Holographic Data Storage System - An apparatus for recording or reading high areal density holographically stored information with high signal-to-noise ratio. The apparatus comprises a holographic imaging system for recording or reconstructing a holographic image, having a first numerical aperture and a first focal length and an additional optical system for filtering the signal beam, having a second numerical aperture and a second focal length, wherein the numerical aperture of the additional optical system is less than the numerical aperture of the holographic imaging system and/or the focal length of the additional optical system is greater than the optical length of the holographic imaging system. | 01-21-2010 |
20100039684 | SENSITIZER DYES FOR PHOTOACID GENERATING SYSTEMS USING SHORT VISIBLE WAVELENGTHS - Photosensitizing dyes are often used in conjunction with a photoacid generator in photopolymerizable materials and in holographic recording media. Typical dyes for these materials are used in the region of the visible spectrum for wavelengths greater than about 450 run. The present invention discloses a number of new 1,4-alkynyl substituted napthalene photosensitizing dyes that have suitably low extinction coefficients coupled with good sensitizing properties for use in such materials at wavelengths in the visible spectrum region of about 400 nm. | 02-18-2010 |
20100097675 | METHOD AND APPARATUS FOR PHASE-ENCODED HOMOGENIZED FOURIER TRANSFORM HOLOGRAPHIC DATA STORAGE AND RECOVERY - An apparatus for writing and reading holograms, comprising a spatial light modulator (SLM) operable in phase mode, having a plurality of pixels for generating an object beam that overlaps with a reference beam; a holographic recording medium (HRM) in the path of the object beam; and a first lens element disposed in the path of the object beam between the SLM and the HRM; wherein the HRM is disposed at or near the Fourier transform plane of the first lens element. | 04-22-2010 |
20100280260 | Holographic storage medium comprising polyfunctional epoxy monomers capable of undergoing cationic polymerization - Disclosed is a holographic recording medium. The novel holographic recording mediums disclosed herein comprises: a) at least one polyfunctional epoxide monomer or oligomer which undergoes acid initiated cationic polymerization. Each epoxide in the monomer or oligomer is linked by group comprising a siloxane to a silicon atom and each monomer or oligomer has an epoxy equivalent weight of greater than about 300 grams/mole epoxide; b) a binder which is capable of supporting cationic polymerization; c) an acid generator capable of producing an acid upon exposure to actinic radiation; and optionally d) a sensitizer. | 11-04-2010 |
20120273522 | DISPENSING SYSTEM AND SECURITY DEVICE FOR USE IN CONJUNCTION THEREWITH - A product dispensing system includes a partially-open container for retaining a supply of the product, a mechanism for dispensing a quantity of the product from the container, and a remotely-activated security device for selectively restricting the dispensing of product from the container. In one embodiment, the security device is in the form of a spherical enclosure that is mounted over the inlet port for a draw tube of the dispensing mechanism. In use, the security device includes an activation mixture, such as an expandable adhesive, that transitions the security device between a first state and a second state in response to an application of certain non-mechanical stimuli, such electromagnetic energy of a particular profile, the security device restricting the passage of the product through the draw tube when disposed in the first state and permitting the passage of the product through the draw tube when disposed in the second state. | 11-01-2012 |
20140230897 | SOLAR CONCENTRATION SYSTEM USING VOLUME HOLOGRAMS - An electromagnetic wave concentrating system, comprising a photovoltaic material and at least one holographic concentrator. The holographic concentrator includes at least two stacked holographic optical elements (HOE). Each HOE is configured to diffract incident light into a diffracted beams having different ranges of wavelengths. The diffracted beams generated by each HOE are directed at the photovoltaic material. | 08-21-2014 |