Patent application number | Description | Published |
20080247011 | DATA STORAGE METHOD AND DEVICE - A method for storing data including: providing a first substrate having a plurality of micro-holograms therein, the micro-holograms being indicative of the data; providing a second hologram-supporting substrate; illuminating the plurality of micro-holograms in the first substrate through the second substrate, thereby producing a holographic pattern in the second substrate indicative of reflections of the plurality of micro-holograms in the first substrate; providing a third hologram-supporting substrate; and, illuminating the holographic pattern in the second substrate through the third substrate, thereby substantially replicating the plurality of micro-holograms in the first substrate in the third substrate. | 10-09-2008 |
20090219606 | DEVICE AND METHOD - An article includes an optical device. The optical device includes a first prism and a second prism. The first prism includes an optically active material that responds to an external stimulus that affects a refractive index of at least a portion of the first prism. A method for making a method of use of the article is also provided. | 09-03-2009 |
20090219611 | DEVICE AND METHOD - An article includes an optical device. The optical device includes a first lens and a second lens. The first lens includes an optically active material that responds to an external stimulus that affects a refractive index of at least a portion of the first lens. A method for making a method of use of the article is also provided. | 09-03-2009 |
20090325078 | HOLOGRAPHIC RECORDING MEDIUM - A holographic recording medium including an optically transparent substrate is provided. The optically transparent substrate includes an optically transparent plastic material and a photochemically active dye. The optically transparent substrate has an absorbance of greater than 1 at a wavelength that is in a range of from about 300 nanometers to about 1000 nanometers. The holograms recorded in the optically transparent substrate are capable of having diffraction efficiencies of greater than about 20 percent. The holographic recording medium may include a photo-product. A method of making the holographic recording medium, an optical writing and reading method, a method for using a holographic recording article, and a method of manufacturing the holographic recording medium are provided. | 12-31-2009 |
20100149934 | METHOD FOR FORMATTING AND READING DATA DISKS - The present techniques present methods and systems for increasing a data reading rate on optical data disks using a single reading head. The methods take advantage of the difference between a mean focal distance (MFD), or minimum spacing that the detector can distinguish between bits, and the minimum separation of bits in a single track to increase the reading speed. As the bits may be more closely spaced across adjacent tracks or layers, these techniques may be used to increase the reading speed of the disk. Specifically, the data symbols that make up a single bit-stream may be stored in a pattern horizontally across adjacent tracks, or vertically across adjacent layers. Accordingly, the focal point of the detector is scanned across the disk in the same pattern to read the individual data symbols. | 06-17-2010 |
20100157772 | DATA STORAGE DEVICES AND METHODS - A data storage device comprises a substrate having oppositely disposed surfaces and a plurality of volumes arranged along tracks between the surfaces; a plurality of micro-holograms each contained in a corresponding one of the volumes; and, at least one groove in at least one of the surfaces and being operative to diffract light through the at least one surface and into the volumes; wherein, the presence or absence of a micro-hologram in a stacked layer in each of the volumes is indicative of a corresponding portion of data stored. | 06-24-2010 |
20100157773 | DATA STORAGE DEVICES AND METHODS - A data storage device including: a plastic substrate having a plurality of volumes arranged in tracks along a plurality of vertically stacked, laterally extending layers therein; and, a plurality of micro-holograms each contained in a corresponding one of the volumes; herein, the presence or absence of a micro-hologram in each of the volumes is indicative of a corresponding portion of data stored. | 06-24-2010 |
20100157774 | DATA STORAGE SYSTEMS AND METHODS - A system for use with a data storage media having at least one groove proximate a surface thereof and a plurality of volumes therein, including: objective lensing; a first tracking error detector optically coupled to the objective lensing and being responsive to reflections from the at least one groove; a first actuator coupled and responsive to the first tracking error detector; a second tracking error detector optically coupled to the objective lensing and responsive to reflections from micro-holograms contained in at least some of the volumes; and, a second actuator coupled and responsive to the second tracking error detector; wherein the first and second actuators cooperate to selectively position the objective lensing to focus a light beam into a target one of the volumes. | 06-24-2010 |
20100157775 | DATA STORAGE DEVICES AND METHODS - A data storage device including: a plastic substrate having a plurality of data volumes arranged along tracks in a plurality of stacked layers; a plurality of micro-holograms each contained in a corresponding one of the data volumes; a plurality of complementary volumes, each corresponding to and being substantially aligned with one of the data volumes; a plurality of micro-holograms each contained in a corresponding one of the complementary volumes; wherein, the presence or absence of a micro-hologram in each of the data volumes is indicative of a corresponding portion of data stored; and, the ones of the complementary volumes corresponding to the ones of the data volumes containing a micro-hologram do not contain a micro-hologram; and the ones of the complementary volumes corresponding to the ones of the data volumes not containing a micro-hologram contain a micro-hologram. | 06-24-2010 |
20100157776 | VERTICALLY TRACKED DATA STORAGE DEVICE AND METHOD - A data storage device including: a plastic substrate having a plurality of volumes arranged along a plurality of depth-extending, concentrically stacked tracks; and, a plurality of micro-holograms each contained in a corresponding one of the tracks; wherein, the presence or absence of a micro-hologram in each of said volumes is indicative of a corresponding portion of data stored. | 06-24-2010 |
20100165816 | SYSTEM AND METHOD FOR TRACKING IN SINGLE-BIT HOLOGRAPHIC DATA STORAGE - A system and method for controlling tracking in a holographic data storage system, including: impinging a beam on a holographic data disc, wherein the beam is reflected from a micro-hologram disposed within the holographic data disc; detecting the reflected beam from the holographic data disc by a multi-element detector; and analyzing a pattern detected by multi-element detector to generate a tracking error signal. | 07-01-2010 |
20100165817 | DISC STRUCTURE FOR BIT-WISE HOLOGRAPHIC STORAGE - An optical disc for micro-holographic data storage, including: optically-enabled material configured to store holographic data; guide grooves; a first coating disposed on the guide grooves and configured to reflect a tracking beam and to transmit a read or record beam; and a second coating disposed to cover the guide grooves and disposed on the first coating. | 07-01-2010 |
20100165818 | SYSTEM AND METHOD FOR DUAL-BEAM RECORDING AND READOUT OF MULTILAYERED OPTICAL DATA STORAGE MEDIA - A system and method of operating a dual-beam detection system of a holographic data storage disc, including: impinging a data beam on a data layer of the holographic data storage disc; impinging a tracking beam on a tracking element of the holographic data storage disc; detecting a reflection of the tracking beam from the tracking element; and coordinating position of the data beam relative to the tracking beam. | 07-01-2010 |
20100165819 | MASTERING AND REPLICATION OF MICRO-HOLOGRAPHIC DATA STORAGE MEDIA - A system and method for replicating optical data storage discs (e.g., holographic data storage discs) having multiple layers of data. Master discs providing for respective single layers of data are utilized, and each respective single layer of data from the master discs are replicate onto the optical data storage disc. | 07-01-2010 |
20100246354 | SYSTEM AND METHOD FOR READING MICRO-HOLOGRAMS WITH REDUCED ERROR RATES - The present techniques provide methods and systems reading a data bit of interest on an optical data disc with a reduced error rate. The data bit estimation may be improved by reducing deterministic noise resulting from an optical reader system and/or the optical data disc. The reader may adjust the position of a detector to detect light scattered from the disc based on parameters of known noise sources. In one embodiment, the detector may be moved vertically in relation to the data bit of interest on the optical disc. In another embodiment, more than one detector may be used to detect light scattered from a data bit of interest. In embodiments, the positioning of the detector(s) may be based on system or disc parameters, and the detected scatterings may provide a data reading, improved for an optical return from a present micro-hologram. | 09-30-2010 |
20100302927 | OPTICAL DATA STORAGE MEDIUM AND METHODS FOR USING THE SAME - There are provided an optical data storage medium and methods of optical data storage using the same. The optical data storage medium comprises a non-linear sensitizer capable of absorbing actinic radiation to cause upper triplet energy transfer to a reactant that undergoes a photochemical change upon triplet excitation. | 12-02-2010 |
20100328741 | HOLOGRAPHIC DEVICE - A device comprising an authentication hologram recorded within a defined volume of a holographic recording medium, wherein the authentication hologram is configured to convey authentication information; wherein the authentication hologram comprises a plurality of related volumetric holograms recorded within the defined volume; and wherein the holographic recording medium comprises an optically transparent plastic material and a photochemically active dye. In one embodiment, all the holograms are identical. In one embodiment, the holograms are different. | 12-30-2010 |
20120033289 | ARTICLE USING AN OPTICAL DEVICE - An article includes an optical device. The optical device includes a first prism, a second prism, and a light source. The first prism includes an optically active material that affects a refractive index of at least a portion of the first prism via a photochemical change induced by exposure to different wavelengths of light from the light source. | 02-09-2012 |