Patent application number | Description | Published |
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 |
20100149958 | METHOD AND SYSTEM FOR MODULATION CODING AND SYNCHRONIZATION - The present techniques provide systems and methods for modulation coding of data on optical disks, such as holographic data disks, and techniques for reading that data back from the disks. The techniques involve parsing a bit stream into a sequence of individual bit-patterns, and then using the individual bit patterns to select a symbol, or matrix, from a lookup table of previously selected matrices. The symbols are selected according to predetermined criteria that may help make the disk more resistant to interferences and errors, such as surface scratches, and the like. For example, criteria that may be used to select the symbols are the number of reflective and non-reflective regions within each matrix, and the number of sequential reflective regions, among others. The symbols may be written to the disk in a two-dimensional fashion, e.g., across adjacent tracks, or in a three-dimensional fashion, e.g., across adjacent data layers. | 06-17-2010 |
20100157757 | SYSTEM AND METHOD FOR STORAGE OF DATA IN CIRCULAR DATA TRACKS ON OPTICAL DISCS - The present techniques provide methods and systems for reading and processing a data signal read from an optical data disc. In embodiments, an optical reader system may read data bits from a data ring in the disc. The data rings may be concentric, and a beginning of a sequence of data on the data ring may be in substantially the same position as an ending of the sequence. The reader may identify a data ring and begin the read process on the targeted data ring, and may end the read process when the reader reaches the starting point. The data sequence read from the data ring may be decoded to form a bit stream, which may be provided to various output devices. A circular trellis formed from the bit stream may enable the reading of a targeted data sequence without additional tail bits to improve data transmission efficiency. | 06-24-2010 |
20100157771 | METHOD AND SYSTEM FOR BIT PREDICTION USING A MULTI-PIXEL DETECTOR - The present techniques provide methods and systems for more reliable reading of optical data disks. In embodiments, a multi-pixel detector that is segmented into multiple areas, or detector segments, may be used to detect a pattern in the light reflected from an optical data disk. The pattern may include light scattered from a single bit that may be under a center detector, as well as light scattered from proximate bits. The detector system may then combine the quantized values from each of the detector segments mathematically to determine the presence or absence of a bit or bits of data. The mathematical combination may also use data that is known about the status of adjacent data bits (such as previously read bits, or bit patterns which are allowed or not allowed by specific data encoding schemes) to improve the accuracy of the bit prediction. | 06-24-2010 |
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 |
20100162280 | CASCADED CONTROL OF A PICK-UP HEAD FOR MULTI-LAYER OPTICAL DATA STORAGE - A system and method of controlling position of a pick-up head of an optical drive, including manipulating the position of the pick-up head as a primary variable in a cascade control scheme, and manipulating current flowing through the pick-up head as a secondary variable in the cascade control scheme. | 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 |
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 |
20110051586 | OPTICAL DATA STORAGE MEDIA AND METHODS FOR USING THE SAME - There are provided optical data storage media and methods of optical data storage using the same. The optical data storage media comprises a non-linear sensitizer capable of absorbing actinic radiation to cause upper triplet energy transfer to a reactant that undergoes change upon triplet excitation. The refractive index change (Δn) of the medium is at least about 0.005, or even at least about 0.05. | 03-03-2011 |
20110053054 | COMPOSITIONS, OPTICAL DATA STORAGE MEDIA AND METHODS FOR USING THE OPTICAL DATA STORAGE MEDIA - There are provided compositions, optical data storage media and methods of using the optical data storage. The compositions comprise a non-linear sensitizer comprising one or more platinum ethynyl complexes capable of absorbing actinic radiation to cause upper triplet energy transfer to a reactant that undergoes a photochemical change upon triplet excitation. | 03-03-2011 |
20110053055 | COMPOSITIONS, OPTICAL DATA STORAGE MEDIA AND METHODS FOR USING THE OPTICAL DATA STORAGE MEDIA - There are provided compositions, optical data storage media and methods of using the optical data storage media. The compositions comprise a non-linear sensitizer comprising one or more subphthalocyanine reverse saturable absorbers capable of absorbing actinic radiation to cause upper triplet energy transfer to a reactant that undergoes a photochemical change upon triplet excitation. | 03-03-2011 |
20110080823 | DISC STRUCTURE FOR BIT-WISE HOLOGRAPHIC STORAGE - An optical article is provided. The optical article includes a first layer. The first layer includes an active holographic layer configured to store holographic data. The first layer has a first surface and a second surface. A second layer includes a low birefringence material. The second layer also has a first surface and a second surface. Guide grooves are present in any one of the first layer or the second layer. In certain embodiments, the article may further include a reflective layer, an anti-reflective layer, a barrier layer, and a combination thereof. | 04-07-2011 |
20110081602 | OPTICAL DATA STORAGE MEDIA AND METHODS FOR USING THE SAME - An optical data storage medium is provided. The optical data storage medium includes a polymer matrix; a reactant capable of undergoing a change upon triplet excitation, thereby causing a refractive index change; and a non-linear sensitizer capable of absorbing actinic radiation to cause upper triplet energy transfer to said reactant. The refractive index change capacity of the medium is at least about 0.1. The reactant comprises polyvinyl chlorocinnamate, polyvinyl methoxycinnamate, or a combination thereof. | 04-07-2011 |
20110242958 | SYSTEM AND METHOD FOR TRANSFER OF DATA STORED IN HOLOGRAPHIC STORAGE MEDIUM - A system for processing information is provided. The system includes multiple micro-holograms contained in multiple volumes arranged along multiple tracks in one or more storage mediums. Each of the micro-hologram includes a data. The system also includes one or more pick-up head devices with optical lenses for directing laser beams on the multiple tracks. Further, the system includes a subsystem for arranging the one or more pick-up head devices for recording and retrieving of the data from the one or more storage mediums. | 10-06-2011 |
20110261667 | SYSTEM AND METHOD FOR PROTECTING PIRACY IN OPTICAL STORAGE - A method for encoding in a holographic disk storage medium is provided. The method includes recording multiple micro-holograms such that the micro-holograms are aligned across a respective plurality of tracks and across a respective plurality of layers at a pre-determined location of an original holographic disk. The method also includes detecting a characteristic waveform signal of a reflected beam from the original holographic disk. The method further includes detecting a second waveform signal from a second holographic disk. The method also includes comparing the second waveform signal with the characteristic waveform signal. The method further includes determining authenticity of the second holographic disk based upon comparison. | 10-27-2011 |
20110273973 | SYSTEM AND METHOD FOR IMPROVED DATA STORAGE - A method for storing data on a storage medium is provided. The method includes receiving a modulated bitstream, wherein the modulated bitstream comprises a plurality of bits comprising a bitstate of 1 and 0. The method also includes secondary modulating each of the pluality of bits comprising the bitstate of 1 to output a plurality of secondary modulated bits. The method further includes forming a plurality of marks in the storage medium, the marks indicative of each of the plurality of secondary modulated bits and the plurality of bits comprising the bitstate of 0 in the modulated bitstream. | 11-10-2011 |
20120092979 | METHOD OF PARALLEL BIT-WISE HOLOGRAPHIC DATA STORAGE USING A PARALLEL LIGHT SOURCE - The present techniques provide techniques for outputting counter-propagating parallel light waves to pre-record a holographic data disk. The parallel light waves are transmitted through a holographic system via a fiber optic bundle including a plurality of polarization-maintaining (PM) optical fibers. Each of the PM optical fibers in the fiber optic bundle may have one or more of a different wavelength, a different coherence length, and a different polarization orientation to reduce crosstalk in the disk. Furthermore, the fiber optic bundle array is rotated to produce interference spots indicative of micro-holograms according to the data track pitch of the holographic disk over which the fiber optic bundle is outputting the light waves. | 04-19-2012 |
20120092980 | REPLICATION AND FORMATTING METHOD AND SYSTEM FOR BIT-WISE HOLOGRAPHIC STORAGE - The present techniques provide methods and systems for recording micro-holograms on a holographic disk using a plurality of counter-propagating light beams in parallel. The parallel counter-propagating light beams overlap to form interference patterns on a data layer and over multiple data tracks in the holographic disk. Rotating the disk enables the parallel recording of micro-holograms over multiple data tracks, thus reducing recording time. Further, the illumination pattern may include illuminated spots and non-illuminated regions, such that each illumination spot may cover a relatively small fraction of the data layer plane, possibly controlling the depth spread of the recorded micro-hologram. In some embodiments, data in the parallel signal beams may be retrieved from a master holographic disk or may be modulated into the parallel signal beams. | 04-19-2012 |
20120127843 | SERVOING SYSTEM FOR MASTER WITH PARALLEL TRACKS IN A HOLOGRAPHIC REPLICATION SYSTEM - Techniques are provided for controlling the reading of optical data from a master disk in a holographic replication system. Imperfections in the master disk or movement of the disk during a recording process may cause source beams to deviate from target data tracks. In some embodiments, a detector system is used to determine the focus and alignment of the source beams on the master disk, as well as the tilt and rotation of the disk with respect to the holographic replication system. The detector system may detect deviations in the intensity distribution of the reflections of the source beams and generate an error signal corresponding to focusing, tracking, tilt, and/or rotational errors. Servo-mechanical devices may actuate optical components to compensate for such errors. | 05-24-2012 |
20120163145 | OPTICAL DATA STORAGE MEDIA - Optical data storage media for bit-wise recording of a microhologram using an incident radiation at a wavelength of about 405 nm are provided. The optical storage medium includes (a) a non-photopolymer polymer matrix; (b) a non-linear sensitizer comprising a phenylethynyl platinum complex, wherein the non-linear sensitizer is capable of triplet-triplet energy transfer from an upper triplet state (T | 06-28-2012 |
20120170432 | READ POWER CONTROL - Techniques are provided for controlling the reading of micro-holograms from a holographic disk based on a target data layer to be read in the disk. Reading a target data layer which is relatively deeper in the disk (e.g., farther from an optical head emitting a reading beam) may involve using a higher power reading beam to compensate for power attenuation of the returned reading beam. For example, a power adjustment module may be used to dynamically adjust a reading laser emitting the reading beam, based on the dynamically changing target data layer. By compensating for power attenuation in deeper target data layers, the variance of power in the returned reading beams may be decreased, possibly improving the bit error rate in micro-hologram reading techniques. | 07-05-2012 |
20120170437 | NON-BINARY HOLOGRAMS FOR INCREASED CAPACITY - Techniques are provided for increasing storage capacity in a holographic storage system. While typical holographic storage systems involve binary storage for each data position in a holographic disk, present techniques involve storing data such that more than two data levels may be recorded in each data position. In some embodiments, a recording beam directed to the disk may be adjusted to different power levels depending on the data level to be recorded. Furthermore, the recording time at a data position may be adjusted to increase the energy directed to the data position by increasing the amount of time the recording beam is impinged on the data position. Embodiments are suitable for different types of holographic storage, including dye-based medium. | 07-05-2012 |
20120170438 | SERVO STRUCTURE IN SINGLE-BIT HOLOGRAPHIC VOLUME RECORDING AND READOUT - Methods and systems are provided for recording micro-holograms in a holographic disk. Disk tilting or disk imperfections may cause counter-propagating recording and reference beams to deviate from the target data position in the disk. In some embodiments, a tracking beam is directed to a tracking position in the disk, and deviation of the tracking beam from the tracking position may indicate tracking and/or focusing errors of the recording and/or reference beams. A detector may generate an error signal in response to such errors. A first servo-mechanical system may actuate a first optical head (e.g., transmitting the reference and tracking beams) to compensate for such errors, and a second servo-mechanical system may actuate a second optical head (e.g., transmitting the recording beam) to follow the actuation of the first servo system, such that an interference of the reference beam and the recording beam may be maintained in the target data position. | 07-05-2012 |
20120250120 | MULTI-WAVELENGTH- HOLOGRAPHIC SYSTEMS AND METHODS - A holographic system for recording and reading information is provided. The system includes at least one laser for providing a laser beam. The system also includes a subsystem configured for multi-wavelength operation of said holographic system and recording micro-holograms at different wavelengths in substantially non-overlapping volumes of a holographic medium. | 10-04-2012 |
20120253147 | CALIBRATION METHOD AND ARRANGEMENT AND SENSOR FOR NON-INVASIVELY MEASURING BLOOD CHARACTERISTICS OF A SUBJECT - A calibration method for an apparatus for non-invasively monitoring blood characteristics of a subject is disclosed. The apparatus is provided with a computational model representing a relationship between in-vivo measurement signals obtained from the subject and the blood characteristics. The providing includes employing at least one tissue property variable in the computational model, in which the at least one tissue property variable is indicative of absorption and scattering characteristics of the subject's tissue. An arrangement for determining blood characteristics of a subject and a sensor for the arrangement are also disclosed. | 10-04-2012 |
20120328973 | METHOD OF RECORDING DATA IN AN OPTICAL DATA STORAGE MEDIUM AND AN OPTICAL DATA STORAGE MEDIUM - In accordance with one aspect of the present invention, a method for recording holographic data in an optical data storage medium is provided. The method includes (i) providing an optical data storage medium including: (a) a thermoplastic polymer matrix, (b) a latent acid generator, (c) a non-linear sensitizer, and (d) a reactant including a latent chromophore. The method further includes (ii) irradiating a volume element of the optical data storage medium with an interference pattern, said interference pattern including an incident radiation having a wavelength and an intensity sufficient to cause upper triplet energy transfer from the non-linear sensitizer to the latent acid generator, thereby generating an acid, wherein the latent acid generator is substantially non-responsive to said incident radiation. The method furthermore includes (iii) reacting at least one protected chromophore with the acid generated to form at least one chromophore, thereby causing a refractive index change within the volume element; and (iv) producing within the irradiated volume element refractive index variations corresponding to the interference pattern, thereby producing an optically readable datum. An optical data storage medium is also provided. | 12-27-2012 |
20140036328 | STACKED FILM THRESHOLD COMPONENT, DEVICE, AND METHOD OF MANUFACTURE - A component includes a micro-hologram layer, where the micro-hologram layer includes layers inert to light interleaved with layers of functional film. The functional film layers are made of a material that undergoes a change in its refractive index when illuminated by a light beam, yet undergoes no change in its refractive index when illuminated by a different light beam. The components may further include interleaved spacer films with multiple micro-hologram layers and other elements (e.g., servo layer, coatings, and the like) so as to comprise a data storage device. Methods of manufacturing the component and device are also disclosed. | 02-06-2014 |
20140139841 | FIBER OPTIC SENSING APPARATUS INCLUDING FIBER GRATINGS AND METHOD FOR SENSING PARAMETERS INVOLVING DIFFERENT PARAMETER MODALITIES - Optical-based apparatus and method for sensing parameters in connection with an asset, such as a pipeline, are provided. At least two sites in an optical fiber may include a respective fiber grating arranged to have a respective optical response in a wavelength spectrum having a distinguishing feature indicative of a value of a respective local parameter at a respective grating site. The two fiber gratings may be further arranged to form, in combination with a respective portion of the optical fiber which extends between the two sites, respective optical backscatter portions that when combined with one another are effective to sense an optical change in the fiber portion between the sites indicative of a value of a distributed parameter. This is a parameter modality different from a parameter modality of the respective local parameters at the respective grating sites. | 05-22-2014 |