56results about "Recording/reproducing/erasing using optical interference patterns" patented technology

A sensor and method for page-based optical data storage. The sensor includes a partially-reflective mirror, a reflective mirror disposed substantially collinear with and spaced apart from the partially-reflective mirror, and an active layer disposed substantially collinear with and between the partially-reflective mirror and the reflective mirror. The partially-reflective mirror has a first and second side and transmits a portion of light incident on the first side. The reflective mirror reflects light incident on the reflective mirror toward the partially-reflective mirror. The active layer absorbs at least a portion of the light oscillating at the resonant frequency.

To improve the production efficiency of a hologram by easily filling a refractive index matching liquid.SOLUTION: In the method for manufacturing the hologram, a superposing member 3 is arranged on one side of a material 1 to be treated having an unexposed photosensitive layer 11 with a gap S, refractive index matching liquid is filled in the gap S between the material 1 to be treated and the superposing member 3, and coherent light is irradiated on the photosensitive layer 11 after filling the refractive index matching liquid to record an interference fringe on the photosensitive layer 11.SELECTED DRAWING: Figure 3

A method for storing data in a holographic medium is provided. The method comprises recording a plurality of holograms in one or more at least partially overlapping regions in a holographic medium. The data is stored in a combination of the plurality of holograms. A system for implementing the method is also provided.

An image reproduction device 6 reproduces an image including N different parameters of a wavelength range or the like, and comprises: a multiplexed hologram acquisition unit 61 for acquiring N to 2N multiplexed holograms obtained by multiplex-recording interference patterns for each parameter; a parameter selection unit 63 for selecting the parameters one by one; a hologram generation unit 64 for generating a calculation hologram including two light waves having the selected parameters from the multiplexed holograms; and a light wave restoration unit 65 for restoring one of the two light waves from the calculation hologram.

The present invention relates to a holographic recording medium, a method for producing the same, and an optical element including the same. The holographic recording medium has a specific element composition ratio, and thus has excellent optical recording properties, excellent durability against heat and moisture, suitable adhesive strength to a transparent adhesive, and high transparency.

The disclosure relates to a benzopyrylium dye of the formula (I),in which R200, R201, R202, R203, R204, R205, R206, R207 and R208 independently of one another are each hydrogen, C1 to C16 alkyl, C4 to C7 cycloalkyl, C7 to C16 aralkyl, C6 to C10 (het)aryl, hydroxyl, C1 to C6 alkoxy, or dialkylamino, the dialkylamino being selected from the group consisting of diethylamino, dimethylamino, diisopropylamino, a six-membered saturated ring attached via the N of the amino group, which may additionally contain an N or O and may be substituted by nonionic arbitrary radicals, or a combination of at least two thereof, and / or R200 with R201 or R201 with R202 or R202 with R203 and / or R205 with R206 and / or R206 with R207 each independently of one another form a —CH═CH—CH═CH— bridge, and A is a —CH2— or a —CH2—CH2— bridge, where the anion Ann− has a molecular weight of ≥200 g / mol and does not contain a halogen atom.

A holographic storage optical system, relating to the field of holographic storage optics, includes: a first metasurface provided in an optical path of a S-polarized writing light beam, configured to split the writing light beam into a first polarized light and a second polarized light exhibiting an off-axis focusing characteristic; a second metasurface provided in the optical path of the second polarized light, configured to reflect the second polarized light into parallel light; a mask with a target image provided in the optical path of the parallel light; a third metasurface provided in the optical path of the second polarized light and configured to focus the parallel light after it passes through the mask; and a photosensitive material provided at an intersection of the first polarized light and the focused polarized light. The present application simplifies the construction of the holographic storage optical system.

The invention relates to the technical field of information storage, in particular to a dynamic adjustable holographic optical storage medium and a preparation method thereof.The dynamic adjustable holographic optical storage medium comprises an outer ring and a storage medium body, an inner ring is arranged on the inner side of the outer ring, a water storage shell is arranged on the inner side of the inner ring, the top of the water storage shell is not closed, and a containing shell is arranged on the inner side of the water storage shell; the storage medium body is arranged in the placement shell; the fixing mechanism is located at the top of the placing shell, and the fixing mechanism is used for fixing the position of the storage medium body and preventing the storage medium body from shaking in the using process; through mutual cooperation of a water storage shell, a placement shell, a rubber connecting ring, a rubber corrugated pipe, a water passing opening and the like, when the case is vibrated, vibration can be filtered through cooling liquid between the water storage shell and the placement shell, and if the vibration is strong, the cooling liquid shakes the rubber corrugated pipe to do up-down reciprocating motion, so that the vibration is reduced; and a vibration buffering effect is achieved.

To provide a holographic data storage system and a method of exposing an area to a pattern over a sufficient sustaining duration (depending on an output of a beam).SOLUTION: In a method of performing a write operation in a holographic data storage system, a scheduler schedules at least one write operation across several discontinuous write intervals, and, in each of the discontinuous write intervals, a plurality of discontinuous write intervals, in which a region of a holographic recording medium is exposed to an interference pattern resulting from interference between a reference beam and an input beam carrying a set of data has a total duration sufficiently long to cause a sustained state change in the exposed region, thereby the set of data can be recovered from the region by the end of the last write interval of the plurality of discontinuous write intervals.SELECTED DRAWING: Figure 8A

The invention discloses a storage and calculation integrated photon calculation system and method based on a phase change metasurface and holographic light field modulation, and aims to solve the problems that storage and calculation are separated, the dynamic modulation speed is low and the precision is limited in an existing photon calculation framework. The invention provides a hybrid computing architecture which takes a blue-ray disc or a phase change storage wafer as a high-density holographic weight storage medium and is combined with a high-speed spatial light modulator and a photoelectric nonlinear activation circuit. Through an area array parallel reading mechanism, a large-scale weight matrix is read at one time by using beam-expanded coherent light, light velocity matrix multiplication is completed, and interlayer fast switching of the deep neural network is realized in combination with a streaming rotation or light beam scanning technology. According to the invention, the non-volatility and multistage refractive index characteristics of the phase change material are utilized to realize high-density on-chip storage and zero-power-consumption lossless reading of large model weight, and the problems of a video memory wall and an energy consumption wall in large model reasoning are effectively solved.

The invention provides fluorine-containing polymer hollow nanoparticles, a photopolymer type holographic recording medium and application of the photopolymer type holographic recording medium, polystyrene nanospheres are swelled by a solution containing a fluorine-containing monomer, a fluorine-containing cross-linking agent and a photoinitiator, and then polymerization reaction is performed to obtain a core-shell nanoparticle emulsion; tetrahydrofuran is added into the core-shell nanoparticle emulsion, the polystyrene nanosphere template in the core-shell nanoparticle emulsion is completely dissolved and extracted out, the fluorine-containing polymer hollow nanoparticles are obtained, the photopolymer type holographic recording medium containing the fluorine-containing polymer hollow nanoparticles enables the sensitivity of a holographic grating to be larger than 100 cm / mJ, and the photopolymer type holographic recording medium can be applied to the holographic grating. The diffraction efficiency of the recording grating is greater than 95%, the refractive index modulation degree is greater than 0.2, the haze is lower than 1%, and the recording grating has excellent shear strength and tensile strength.

The invention relates to a torquer in a holographic storage system and a focusing suspension wire of the torquer, and the focusing suspension wire comprises a first line segment, a first bending part, a second line segment, a second bending part and a third line segment which are sequentially arranged. The first bending part comprises a first bending line segment, a second bending line segment and a third bending line segment. The second bending part comprises a fourth bending line segment, a fifth bending line segment and a sixth bending line segment; the included angle between the first bending line segment and the second line segment, the included angle between the first bending line segment and the second bending line segment, the included angle between the second bending line segment and the third bending line segment, the included angle between the third bending line segment and the first line segment, the included angle between the fourth bending line segment and the second line segment, and the included angle between the fourth bending line segment and the fifth bending line segment; the included angle between the fifth bending line segment and the sixth bending line segment and the included angle between the sixth bending line segment and the third line segment are both larger than 90 degrees. The rigidity of the second line segment in the tracking direction can be effectively improved, and the function of synchronous movement of the objective lens and the reflector in the tracking direction is achieved.

A method of performing a write operation in a holographic data storage system is provided. A scheduler schedules at least one write operation across multiple non-contiguous write intervals, the write operation pertaining to data to be stored in a region of a holographic recording medium. The scheduler uses an energy estimation function, for estimating an amount of energy required to complete the at least one write operation, to perform said scheduling. In each of the non-contiguous write intervals, the region of the holographic recording medium is exposed to an interference pattern caused by interference between a reference beam and an input beam carrying the data. The multiple non-contiguous write intervals have a total aggregate duration of sufficient length to cause a persistent state change in the exposed region, such that the data is recoverable from that region within a final write interval of the multiple non-contiguous write intervals.

To provide an optical data transfer system.SOLUTION: In a holographic storage system incorporating multi-waveguide networks, an input waveguide network includes a first input light pipe 203 to which a plurality of second input light pipes 204A, 204B are coupled. An input beam 104 from an emitter system 504 is coupled into the first input waveguide 203 through an in-coupling region thereof, and can be guided from there into the second input waveguide 204A or 204B. A reference waveguide network includes a first reference waveguide 205 to which a plurality of second reference waveguides 206A, 206B are coupled. A reference beam 106, 116 from the emitter system 504 is similarly coupled into the first reference waveguide 205, and can be guided into the second reference waveguide 206A or 206B. An output waveguide network includes a first output waveguide 207 to which a plurality of second output waveguides 208A, 208B are coupled.SELECTED DRAWING: Figure 5

In an optical data transmission system, a beam modulator is configured to embed a data set into an input optical beam. A multimode optical waveguide network has an in-coupling region for receiving the input optical beam. The multimode optical waveguide network is configured to direct the input optical beam to an out-coupling region of the multimode optical waveguide network. A spatially coherent detector is configured to measure a phase and an amplitude of an output optical field at a plurality of locations. The output optical field is at least partially defined by the input optical beam and thus exhibits distortion effects caused by the propagation of the optical beam through the multimode waveguide network. Signal processing is applied to the output of the spatially coherent detector to compensate for the distortion effects, thereby recovering the data set embedded in the input optical beam from the output of the spatially coherent detector.

Disclosed herein are a High-Bandwidth Memory (HBM)-based holography processing apparatus and method. The HBM-based holography processing apparatus includes a holography row processing unit configured to receive image data and output row data of complex numbers obtained by performing a Fast Fourier Transform (FFT) on the image data, a HBM configured to store the output row data as data for each color and for each depth, and a holography column processing unit configured to read the stored row data using a column address and perform FFT processing on the read row data.

Provided is a composition suitable for forming a cured film having high solvent resistance and a high refractive index. The composition comprises a polymerizable compound (A) and a polymerizable compound (B), wherein the content of the polymerizable compound (B) with respect to 100 parts by mass of the polymerizable compound (A) is 0.0001 parts by mass to 10 parts by mass. The polymerizable compound (A) has a structure represented by formula (1) and has a refractive index of 1.60 or more. The polymerizable compound (B) is represented by formula (2). (In formula (1), R1 is a hydrogen atom or a methyl group. L1 is a (n1+1)-valent linking group. n1 is 1 or 2. In formula (2), R2 is a hydrogen atom or a methyl group. L2 is a (n2+1)-valent linking group. n2 is 1 or 2.)

The present application relates to the technical field of holographic storage material, in particular to a new type of holographic storage material and a preparation method thereof.The raw materials of the material include PETA, MMA, PQ and AIBN.The material is modified by introducing dendritic molecular material PETA, and after modification, the modified material not only has the air bubble-free characteristic compared with the traditional PQ / PMMA material, but also has improved photosensitive sensitivity of the material system, can significantly shorten the response time of the material, and the introduction of PETA can improve the grating diffraction efficiency uniformity and holographic performance of the material system.

Holographic storage hardware enabled locking includes directing a first reference beam associated with a first process at a storage location in a holographic data storage medium, and detecting, with a detector while the first reference beam is directed at the storage location, whether a second reference beam associated with a second process is also directed at the storage location. Based on the detecting, a signal is generated indicating whether the storage location is locked.

Holographic storage hardware enabled locking includes directing a first reference beam associated with a first process at a storage location in a holographic data storage medium, and detecting, with a detector while the first reference beam is directed at the storage location, whether a second reference beam associated with a second process is also directed at the storage location. Based on the detecting, a signal is generated indicating whether the storage location is locked.

The present invention relates to a photopolymer composition comprising a) a matrix polymer, b) a write monomer, c) at least one photoinitiator system, d) optionally at least one non-photopolymerizable component, and e) optionally catalysts, radical stabilizers, solvents, additives and other auxiliary and / or additional materials, wherein the at least one photoinitiator system c) consists of at least one colorant and at least one coinitiator, at least one of the colorants having a structure according to Formula (I). [Formula 1] TIFF2025507602000048.tif40150

A holographic data storage medium shaped as tape is provided. The holographic data storage medium has a thickness of 60μm or less. A holographic tape cartridge for use with a holographic data storage system is also provided. A system for receiving a holographic tape cartridge comprising a holographic data storage medium is also provided. A holographic tape library is also provided.

The present invention relates to a holographic recording medium, a method for producing the same, and an optical element including the same. The holographic recording medium has a specific element composition ratio, and thus has excellent optical recording properties, excellent durability against heat and moisture, suitable adhesive strength to a transparent adhesive, and high transparency.

The present invention relates to a method for generating a volume reflection hologram using a substrate induced reconstruction beam and / or a substrate induced diffraction beam in a single beam setup, comprising the steps of: (i) providing at least one laser beam source (100) generating a recording beam (101, 102) having a first wave vector (201, 302b, 307); and (ii) providing a holographic recording medium (107, 200) on a transparent substrate (106), the substrate (106) being connected to the at least one laser beam source (102b, 307). (iii) providing a reflector arrangement (103, 103') arranged on the second flat surface of the substrate (106), wherein the recording beams (101, 102) irradiate the holographic recording medium (107), and the recording beams (101, 102) reflect the holographic recording medium (107) and the substrate (106). The reflected beam (104) passes through the plate (106) and is reflected by the reflector arrangement (103, 103') towards the holographic recording medium (107) and the substrate (106) as a reflected beam (104) having a second wave vector (202, 303b, 306), the reflected beam (104) generating an interference pattern with the recording beam in the holographic recording medium (107), the interference pattern having the form of a grating (110, 203) having a grating vector (305), the grating vector (305) being proportional to the wave vector of the reflected beam (104). the grating vector (305) is also identical to the difference vector of the wave vector (303a) of the diffracted beam and the wave vector (302a) of the reconstruction beam, a first plane in which the recording beam and the reflected beam extend is different from a second plane in which the reconstruction beam and the diffracted beam extend, and the grating vector (305) of the grating (110, 203) is parallel to a 30 intersection line of the first and second planes. The invention further relates to an apparatus for generating a volume reflection hologram using a substrate-induced reconstruction beam and / or a substrate-induced diffraction beam in a single beam setup.

The present invention provides a composition for a holographic recording medium, the composition being capable of suppressing generation of a colored body or a light-emitting body that is derived from an oxime ester photopolymerization initiator and effectively suppressing undesirable phenomena such as loss of light and color change of a display image without greatly lowering hologram characteristics. Disclosed is a composition for a holographic recording medium, which contains the following components (a) to (f).　Component (a): an isocyanate compound which does not contain an aromatic ring or a methacrylate group; Component (b): a polycaprolactone polyol; Component (c): an acrylate monomer; Component (d): an oxime ester photopolymerization initiator; Component (e): a compound which has a nitroxyl radical group and an isocyanate-reactive functional group; Component (f): a compound which has an isocyanate group and a methacrylate group, or a compound which has an isocyanate-reactive functional group and a methacrylate group

The present invention facilitates the filling of a refractive-index alignment liquid and improves the production efficiency of a hologram. Provided is a method for manufacturing a hologram that includes: a step of disposing, with a gap S therebetween, an overlap member 3 above one surface of a processing material 1 having an unexposed photosensitive layer 11; a step of filling the gap S between the processing material 1 and the overlap member 3 with a refractive-index alignment liquid; and a step of, after filling with the refractive-index alignment liquid, recording interference fringe on the photosensitive layer 11 by projecting coherent light onto the photosensitive layer 11. Supply holes 5 that communicate with the gap S are formed in the overlap member 3. The refractive-index alignment liquid is filled from the supply holes 5 into the gap S.

In an optical data transmission system, a beam modulator is configured to embed a data set into an input beam. The multimode optical waveguide network has an in-coupling region for receiving an input beam. The multimode optical waveguide network is configured to direct an input beam to an out-coupling region of the multimode optical waveguide network. The spatial coherence detector is configured to measure the phase and amplitude of the output light field at a plurality of positions. The output light field is at least partially defined by the input light beam, thus exhibiting a distortion effect caused by the light beam passing through the multimode waveguide network. Signal processing is applied to the output of the spatial coherence detector to compensate for distortion effects to restore the data set embedded in the input beam from the output of the spatial coherence detector.

The holographic volume grating in the waveguide cell can be recorded using many different methods and systems in accordance with various embodiments of the invention.SOLUTION: One embodiment includes a holographic recording system including at least one laser source configured to emit recording beams, and a movable platform configured to move between a first position and a second position, wherein when the movable platform is in the first position, the at least one laser source is configured to emit a first set of one or more recording beams toward a first set of one or more stations; When the moveable platform is in the second position, the at least one laser source is configured to emit a second set of one or more recording beams toward a second set of one or more stations.SELECTED DRAWING: Figure 11B

The utility model relates to a torquer in a coaxial holographic storage system and an electromagnetic structure thereof, the electromagnetic structure comprises a metal frame and a focusing coil, the thickness of the focusing coil is less than 2mm, and the height of the focusing coil is less than 8mm; the height of the tracking coil is less than 3mm, the width of an inner ring is less than 3mm, and the length of the inner ring is less than 8mm; the two permanent magnets are respectively arranged between the tracking coil and the focusing coil at the two ends of the metal frame; and the number of the yokes is two, and the yokes are inverted U-shaped, are respectively arranged at the two ends of the metal frame, and are respectively buckled on the focusing coil, the permanent magnet and the tracking coil at the two ends of the metal frame. It is ensured that a space magnetic field formed by the tracking coil, the focusing coil and the permanent magnet in the two yokes under interaction can generate electromagnetic force with enough strength, and meanwhile the problem that the servo tracking speed of the torquer is reduced due to the fact that the focusing coil and the tracking coil are too large is solved.