159 results about "Holographic recording" patented technology

The invention discloses a photopolymer type holographic recording medium and a preparation method and application thereof.The photopolymer type holographic recording medium comprises a writing monomer, film-forming resin, a photosensitive initiation combination agent and a catalyst, the writing monomer comprises nanoparticles and a polymerizable monomer, and the film-forming resin is prepared from the nanoparticles and the polymerizable monomer; the refractive index of the polymerizable monomer is smaller than that of the nanoparticles, and the difference between the refractive index of the nanoparticles and the refractive index of the polymerizable monomer is larger than 0.5. The film-forming resin includes a polyol compound and an isocyanate-based compound. The catalyst is used for catalyzing a polyol compound and an isocyanate compound to react to form a film. The photosensitive initiation combination agent is used for sensing light and inducing polymerization of the polymerizable monomer. According to the photopolymer type holographic recording medium disclosed by the invention, after exposure, the polymerizable monomers located in the bright area and the nanoparticles extruded to the dark area have relatively large refractive index difference, so that the refractive index modulation degree of the recording grating can be improved; the film-forming resin provides effective support for the nanoparticles, and the nanoparticles are not agglomerated.

The invention discloses a preparation method of a polymer dispersed liquid crystal holographic grating with s polarization high diffraction characteristics, and belongs to the technical field of holographic optics. Raw materials comprise 60-90% of a thiol-ene monomer, 10-40% of liquid crystals, a photoinitiator accounting for 1.25% of the mass of the monomer, and a coinitiator accounting for 1.56% of the mass of the monomer. Light with the wavelength of 532 nm and the light intensity of 5-30 mW / cm < 2 > is used for carrying out double-interference photoetching to generate photochemical reaction so as to generate the polymer grating film, and the light is s polarized light. Under the optimal recording condition, delta n under s polarization can reach 1.93 * 10, and delta n under p polarization can reach 1.21 * 10. In combination with morphology analysis, it is found that refractive index modulation strongly depends on the proportion of a liquid crystal-rich phase to a polymer-rich phase in the grating. It is proved that the size of liquid crystal microdroplets formed by holographic recording is larger due to low recording intensity, and therefore the threshold driving voltage of the HPDLC grating is reduced.

The invention provides an acrylate monomer with a high refractive index and a preparation method and application thereof, the acrylate monomer has a structure as shown in a formula G1, G2 or G3, the refractive index of the acrylate monomer is 1.75 or above, so that a holographic recording medium has higher sensitivity and higher diffraction efficiency, and the holographic recording medium can be applied to the field of holographic recording. The holographic recording medium is used for a holographic grating, so that the holographic grating has high diffraction efficiency and high refractive index modulation degree.

Holographic volume gratings in waveguide cells can be recorded using many different methods and systems in accordance with various embodiments of the invention. 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 and when the movable 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.

The invention discloses a photopolymer type holographic recording medium and a substrate processing method, and the method comprises the steps: providing a substrate which comprises a glass substrate or a resin substrate; providing a mixed solution of the photopolymer type holographic recording medium; performing hydroxylation treatment on the surface of the substrate to generate hydroxyl groups on the surface of the substrate; uniformly distributing the mixed solution of the photopolymer type holographic recording medium on the surface of a substrate, and baking, so that the compound with a plurality of isocyanate reactive functional groups and the polyisocyanate group compound in the photopolymer type holographic recording medium react to generate film-forming resin; the hydroxyl group on the surface of the substrate participates in the reaction, and the film-forming resin is connected to the substrate in a covalent bond manner. In this way, the adhesion between the photopolymer layer and the substrate can be improved without increasing the complexity of subsequent process operations.

The invention discloses a rapid quantitative differential interference microscopy system and method based on holographic recording. The system comprises a partially coherent illumination module, and a microscope objective, a tube lens, a transmission grating, a first linear polarizer, a first thin lens, a half-wave plate, a shading plate, a phase-type spatial light modulator, a second thin lens, a second linear polarizer and an image acquisition module which are sequentially arranged along the optical axis direction of the partially coherent illumination module. According to the invention, the phase-type spatial light modulator is utilized to realize shearing offset in any direction and at any degree, so that the device is suitable for different types of application occasions; the system realizes holographic recording of differential interference by utilizing grating carrier frequency, realizes quantitative differential interference detection on a to-be-detected sample only by utilizing two acquired images, has very high time resolution, spatial resolution and imaging precision, and has a wide application prospect in biological imaging and industrial detection.

The invention discloses a thiophene monomer, a holographic recording medium, a preparation method and a related device, the structural general formula of the thiophene monomer is shown in the specification, the refractive index of the monomer is larger than 1.8 and smaller than 1.9, the diffraction efficiency can be remarkably improved, the thiophene monomer is applied to preparation of a photopolymer type holographic recording medium, and the photopolymer type holographic recording medium with the sensitivity larger than 100 cm / mJ can be obtained. According to the holographic recording medium, the diffraction efficiency of the recording grating is larger than 95%, the refractive index modulation degree is larger than 0.1, and the shrinkage rate is lower than 1%, and further, the holographic recording medium can be used for preparing a volume holographic grating, a holographic optical element and an optical device.

The invention discloses a (methyl) acrylate monomer, a holographic recording medium, a preparation method and a related device.The structural formula of the (methyl) acrylate monomer is as shown in G1-G19. The preparation method is easy to operate and high in synthesis yield, and further, the holographic recording medium can be applied to holographic recording. According to the photopolymer holographic recording medium, the (methyl) acrylate monomer with the structure is introduced into the photopolymer holographic recording medium, so that the holographic recording medium with high sensitivity, high diffraction efficiency and no yellowing is obtained, and the invention further provides a preparation method of the holographic recording medium. The invention also provides a volume holographic grating, a holographic optical element and an optical device comprising the holographic recording medium.

The invention discloses a thianthrene monomer, a holographic recording medium, a preparation method and a related device, the structural formula of the thianthrene monomer is shown as G1-G6, the refractive index of the thianthrene monomer is larger than 1.7 and smaller than 1.8, the diffraction efficiency can be remarkably improved, and further, the holographic recording medium can be applied to holographic recording. The thianthrene monomer with the structure is introduced into the photopolymer type holographic recording medium, so that the holographic recording medium with high sensitivity, high diffraction efficiency and high refractive index is obtained, and the invention further provides a preparation method of the holographic recording medium. The invention also provides a volume holographic grating, a holographic optical element and an optical device comprising the holographic recording medium.

The invention discloses a (methyl) acrylate monomer, a holographic recording medium, a preparation method and a related device.The structural formula of the (methyl) acrylate monomer is as shown in G1-G5. The preparation method is easy to operate and high in synthesis yield, and further, the holographic recording medium can be applied to holographic recording. The (methyl) acrylate monomer with the structure is introduced into the photopolymer type holographic recording medium, reverse migration of a short polymer chain can be effectively inhibited, and therefore the holographic recording medium with high sensitivity and high diffraction efficiency is obtained, and the invention further provides a preparation method of the holographic recording medium. The invention also provides a volume holographic grating, a holographic optical element and an optical device comprising the holographic recording medium.

The invention discloses a dendritic (methyl) acrylate monomer, a holographic recording medium, a preparation method and a related device. Wherein the structural formula of the dendritic (methyl) acrylate monomer is shown as G1-G12, the preparation method of the dendritic (methyl) acrylate monomer is simple and easy to operate, and further, the dendritic (methyl) acrylate monomer with the structure is introduced into the photopolymer type holographic recording medium, so that the photopolymer type holographic recording medium is prepared. The invention further provides a preparation method of the holographic recording medium, a volume holographic grating containing the holographic recording medium, a holographic optical element containing the holographic recording medium and an optical device containing the holographic recording medium.

The invention provides a polymerizable monomer with the refractive index larger than 1.7 and a preparation method and application thereof.The polymerizable monomer has the structure shown in the formula G1 or G2 or G3 or G4 or G5 or G6, the refractive index of the polymerizable monomer is 1.7 or above, and therefore a holographic recording medium has various excellent characteristics such as high sensitivity, high diffraction efficiency and high refractive index modulation degree; the holographic recording medium is used for a holographic grating, so that the holographic grating has high diffraction efficiency and high refractive index modulation degree.

The invention discloses a 4, 4 '-bis (omega-alkenyl thioether) diphenyl sulfide monomer and a preparation method, the structural general formula of the 4, 4'-bis (omega-alkenyl thioether) diphenyl sulfide monomer is shown in the specification, n represents the number of methylene and is a positive integer, n = 1-10, the refractive index of a polymer obtained after the monomer and 4 '4-dimercapto diphenyl sulfide are polymerized is larger than 1.65 and smaller than 1.8, diffraction efficiency is remarkably improved, the preparation method is easy to operate, and the preparation method is suitable for industrial production. The invention further provides a photopolymer type holographic recording medium containing the monomer and a preparation method of the photopolymer type holographic recording medium, the sensitivity of the holographic recording medium is larger than 100 cm / mJ, the diffraction efficiency of a recording grating is larger than 95%, the refractive index modulation degree is larger than 0.1, the shrinkage rate is lower than 1%, and the preparation method is simple, controllable and suitable for industrial production. The invention also provides a volume holographic grating containing the holographic recording medium, a holographic optical element and an optical device.

The invention relates to a composition for a holographic recording medium and the holographic recording medium. The composition for the holographic recording medium comprises the following components: a substrate film-forming substance, an active monomer, a photoinitiator and the like. Wherein a substrate film-forming substance mainly adopts a mechanical support as an active monomer to construct a free shuttling spatial network structure, and needs certain rigidity and heat-resistant stability, and tests show that the rigidity and heat-resistant stability of the material can be obviously improved by introducing unsaturated ring structures such as a benzene ring, a naphthalene ring and a do-not ring into the structure; therefore, a powerful spatial network structure is provided for free shuttling of the active monomers, and the display effect of the holographic recording medium is guaranteed.

The invention discloses a dithiocarbamate monomer, a holographic recording medium, a preparation method and a related device, the structural general formula of the monomer is as shown in G1 and G2, R1 represents any one of hydrogen, halogen and C1-C4 alkyl, R3 represents any one of hydrogen, halogen and C1-C4 alkyl, A1 represents C1-C4 alkyl, A2 represents hydrogen or methyl, n is a positive integer, and n = 1-10. The dithiocarbamate monomer provided by the invention has high refractive index, and the holographic recording medium with high sensitivity, high diffraction efficiency and high refractive index modulation degree can be obtained by applying the dithiocarbamate monomer to preparation of the photopolymer holographic recording medium; holographic recording media can be used to prepare volume holographic gratings, holographic optical elements, and optical devices.

The invention relates to the technical field of holographic materials, and provides a holographic recording medium and a preparation method thereof, a grating, an optical waveguide and equipment, the holographic recording medium comprises a polymerizable monomer and a nanoparticle, the refractive index of the nanoparticle is lower than that of the polymerizable monomer, and the refractive index of the nanoparticle is lower than that of the polymerizable monomer under exposure. The polymerizable monomer in the coherent dark area is migrated to the coherent bright area to participate in the polymerization reaction, and meanwhile, the nanoparticles in the coherent bright area are migrated to the coherent dark area. According to the embodiment of the invention, the refractive index difference between the coherent bright region and the coherent dark region is increased, so that the grating can obtain higher diffraction efficiency.

The invention discloses a multi-focal near-to-eye display holographic optical element and a preparation method and device thereof. The element adopts a composite structure of a substrate, a multi-focal correction layer and a holographic recording layer, a holographic grating accurately matched with each optical partition of the correction layer is formed in the recording layer through a partition exposure technology, and multi-depth virtual image display and user refraction correction functions can be realized at the same time. The preparation device comprises a coherent light source, a beam splitter, a diffusion plate, a focal plane displacement system, a mask component and a master controller, and partition exposure is realized through cooperative control. The problem that traditional near-to-eye display cannot meet multi-focus display and refraction correction at the same time is solved, a user can clearly perceive fused multi-depth virtual information and a real environment without additionally wearing glasses, the visual comfort and experience are remarkably improved, and the method is suitable for AR / VR and other head-mounted display devices.

To provide a photosensitive composition capable of further improving diffraction characteristics.The present technology provides a photosensitive composition including: at least a compound represented by the following general formula (1); a binder resin; and a photoinitiator.In the general formula (1), X1 represents an oxygen atom, a nitrogen atom, a phosphorus atom, a caron atom, or a silicon atom.Y1 and Y2 each represent a benzene ring or a naphthalene ring, and both Y1 and Y2 do not represent benzene rings.R1 to R3 each represent a hydrogen or a substituent group represented by *—Z1(R4)d (* represents a bonding site).Z1 represents a single bond, a saturated hydrocarbon group having a valence of 2 or higher, or an unsaturated hydrocarbon group having a valence of 2 or higher, and the saturated hydrocarbon group or the unsaturated hydrocarbon group may have an ether bond and / or a thioether bond.R4 represents a hydrogen or a polymerizable substituent group.

The invention relates to an optical monomer and a preparation method and application thereof, the structural general formula of the optical monomer is shown as G1, G2, G3, G4, G5, G6, G7 and G8, R1 is selected from one of the formulas, and R2 is hydrogen or methyl; n is a positive integer selected from 1-10. The optical monomer provided by the invention contains a plurality of aromatic rings with high molar refractive index and low molar volume, and also contains sulfur atoms with relatively high molar refractive index, so that the whole molecule of the whole monomer is extremely high in refractive index; the polymer also has a phenyl dithiocarbamate structure, and has good compatibility with film-forming resin with carbamate when being used for a photopolymer holographic recording medium. The monomer structure provided by the invention has a plurality of branched chains, the overall molecular weight is small, and the molecules are not easy to agglomerate.

Holographic volume gratings in waveguide cells can be recorded using many different methods and systems in accordance with various embodiments of the invention. 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 and when the movable 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.

The invention discloses a photopolymer type holographic recording medium and a preparation method and application thereof, the photopolymer type holographic recording medium comprises a writing monomer, and the writing monomer comprises epoxy resin and a polymerizable monomer, the polymerizable monomer is selected from an alkenyl naphthalene compound, an alkenyl anthracene compound, an alkenyl benzene compound, an acrylic acid compound, a methacrylic acid compound, an acrylate compound, a methacrylate compound, N-vinyl pyrrole, N-vinyl carbazole, N-vinyl imidazole, N-vinyl indole and N-vinyl pyrrolidone; the carbazole is at least one of trans-N-3-alkyne butenyl carbazole. According to the epoxy resin disclosed by the invention, the volume shrinkage of the polymerizable monomer after polymerization can be effectively reduced, the cationic polymerization of the epoxy resin can be accelerated while the polymerizable monomer forms free radical polymerization, and the photopolymer type holographic recording medium disclosed by the invention is high in light sensitivity, stable in holographic performance and high in volume holographic grating diffraction efficiency.

The invention discloses an optical monomer, a holographic recording medium, a preparation method and a related device, the structural general formula of the optical monomer is as shown in G1-G6, the monomer is high in refractive index, the preparation method is simple, and further, the optical monomer with the structure is introduced into the photopolymer type holographic recording medium, so that the photopolymer type holographic recording medium is prepared. The invention further provides a preparation method of the holographic recording medium, a volume holographic grating containing the holographic recording medium, a holographic optical element containing the holographic recording medium and an optical device containing the holographic recording medium.

The invention discloses a near-infrared photosensitive initiation system, a photopolymer type holographic recording medium, a holographic optical element and display equipment, and the photopolymer type holographic recording medium comprises film-forming resin, a writing monomer, the near-infrared photosensitive initiation system, a chain transfer agent, a catalyst and an additive, the film-forming resin comprises a compound with a plurality of isocyanate reactive functional groups and a polyisocyanate group compound, and the near-infrared light-sensitive initiation system comprises a near-infrared light-sensitive dye and a co-initiator. In this way, monomer polymerization can be efficiently initiated, the material cost is low, and the holographic recording performance of the photopolymer is effectively improved.

The invention discloses an unsaturated phenyl ether monomer, a holographic recording medium, a preparation method and a related device, the structural general formula of the monomer is as shown in G1 and G2, R1 represents any one of R2, A1 and A2 independently represent any one of hydrogen and phenyl, A3 represents hydrogen or methyl, A4 represents C1-C4 alkyl or phenyl, n is a positive integer and n = 1-5. The unsaturated phenyl ether monomer provided by the invention has high refractive index and is in a liquid state, and the holographic recording medium with high sensitivity, high diffraction efficiency and high refractive index modulation degree can be obtained by applying the unsaturated phenyl ether monomer to preparation of the photopolymer type holographic recording medium.

The invention discloses a silicate ceramic material with multicolor reversible photochromic performance as well as a preparation method and application thereof, a photochromic material is BaMgSiO4: xTM, TM is a transition metal element doped in a matrix material and is one or more of Co, Cr, Fe, Ni and Cu; x is the doping molar weight of TM, and 0 < = x < = 0.1. The photochromic material disclosed by the invention has the advantages of high color changing efficiency, multiple color changing effects, lasting color changing effect and good fatigue resistance, and is low in preparation raw material cost, low in equipment requirement, simple and feasible in preparation process and good in repeatability, and the obtained product is high in stability and good in application prospect. The material can be widely applied to the fields of optical information storage, optical regulation and control, optical devices, inductors, anti-counterfeiting, self-developing holographic recording photographing, decoration, radiation meters, protective packaging materials and the like.

A compound represented by the following formula (1): [In the formula, A represents a polymerizable group. n represents an integer of 1 to 3. L represents an optionally branched (n+1)-valent linking group. Z represents an oxygen atom, or a nitrogen atom optionally having a substituent. m represents an integer of 0 or 1. X represents a single bond, an oxygen atom, a sulfur atom, a carbon atom optionally having a substituent, or a nitrogen atom optionally having a substituent. p represents an integer of 0 to 2. When p is 2, the two Xs may be the same or different. Y1 and Y2 are each independently a benzene ring, a naphthalene ring, or a phenanthrene ring. When Y1 or Y2 is a benzene ring, a or b corresponding to Y1 or Y2 is an integer of 0 to 4. When Y1 or Y2 is a naphthalene ring, a or b corresponding to Y1 or Y2 is an integer of 0 to 6. When Y1 or Y2 is a phenanthrene ring, a or b corresponding to Y1 or Y2 is an integer from 0 to 8. R1 and R2 each independently represent an aromatic ring group optionally having a substituent. When a and b are 2 or more, a plurality of R1S and R2s may be the same or different from each other. In the formula, Y1 and Y2 are not both benzene rings and a and b are not both 0.]

An apparatus for manufacturing a radial or azimuthal polarization conversion component includes a reflector having a truncated cone shape. The reflector has a top portion, a bottom portion, and a circumferential portion connected between the top portion and the bottom portion. When a light beam is incident vertically from above, a part of the light beam vertically passes through the top portion to the bottom portion, a part of the light beam enters the circumferential portion at an incident angle and forms a reflected light beam to enter the bottom portion at an incident angle, the reflected light enters the holographic recording material at a refraction angle to generate an exposure range.

A holographic recording medium composition comprising components (a) to (d) below, wherein an amount of allophanate bond units contained in the component (a) relative to a total weight of the components (a) and (b) is 6.5 × 10-4 mol / g or more: component (a): an isocyanate group-containing compound; component (b): an isocyanate-reactive functional group-containing compound; component (c): a polymerizable monomer; and component (d): a photopolymerization initiator.

The invention relates to a method (1000) for manufacturing a hologram security element (2000) comprising the steps: Capturing (1010) image information; Calculating (1020) a phase image that corresponds to the image information in the far field; Folding (1030) the phase image with the imaging function of at least one optical element to assign the far field image information to a different display position; Arranging a holographic recording material in front of a reflective spatial phase modulator such that one side of the holographic recording material faces the spatial phase modulator, Exposure of the recording material with coherent light (52) from the side facing away from the spatial phase modulator, such that the coherent light incident on the side facing away from the spatial phase modulator interferes in the holographic recording material with the phase-modulated light reflected from the reflecting spatial phase modulator in order to store a hologram in the recording material (1100).

The present invention relates to a hologram recording medium and an optical element comprising the same. The hologram recording medium not only has excellent optical recording properties but also can exhibit transparent optical properties and excellent reliability even in high temperature and high humidity environments.