65 results about "Holographic recording" patented technology

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 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 (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 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 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.

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 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 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 invention discloses a photopolymer material, application thereof and a volume holographic grating, and relates to the technical field of polymer photosensitive materials. The photopolymer material comprises the following raw materials: a binder, an active monomer, a photoinitiator, a photosensitizer, a hydrogen donor and a sensitizer, the molar ratio of the active monomer to the photoinitiator is (8-12): 1; the molar ratio of the photosensitizer to the photoinitiator is 1: (15-25); the active monomer comprises a high-refractive-index monomer with the refractive index of 1.55-1.72 and a low-refractive-index monomer with the refractive index of 1.44-1.50, and the molar ratio of the high-refractive-index monomer to the low-refractive-index monomer is (0.7-1.3): 1. The photopolymer material meeting holographic recording can be prepared, and the prepared material is good in heat resistance, rapid in film forming, short in oxygen isolation exposure response time (as long as several seconds), high in refractive index modulation degree, high in sensitivity, high in diffraction efficiency, good in mechanical property and high in transmittance and can be prepared in a large area.

A holographic recording medium. By means of introducing sulfur atoms and aromatic ring groups having high molar refractivity, the structure of an active monomer is modified such that the refractive index of the active monomer is raised to increase the overall refractive index difference, thereby preparing a high-performance volume holographic grating.

Concealed Individualized Hologram Security Element and Method and Device for Verification The invention relates to a method (1000) for producing 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, exposing the recording material with coherent light (52) from the side facing away from the spatial phase modulator, so that the coherent light incident on the holographic recording material from the side facing away from the spatial phase modulator interferes with the phase-modulated light reflected from the reflective spatial phase modulator in order to store a hologram in the recording material (1100). The invention further relates to a manufacturing device, a verification method and a verification device.

Provided is a compound which is useful as an optical material or an optical component, exhibits a high refractive index and high transparency, is easily polymerizable, exhibits chemical stability and high solubility in a variety of solvents, and exhibits storage stability as a solution. The compound is represented by formula (1). In the formula, n denotes an integer between 1 and 3. L denotes an optionally branched linking group having a valency of (n+1). Y1 and Y2 each independently denote an aromatic group having a total of 7-20 carbon atoms, nitrogen atoms, oxygen atoms and sulfur atoms. Ar1 and Ar2 each independently denote an optionally substituted aromatic hydrocarbon group. A ring structure may not be formed by Ar1 and T1 nor by Ar2 and Y2. p and q each independently denote an integer between 0 and 5. However, p and q may not both be 0. R1 denotes a hydrogen atom or a methyl group.

A method and a device for reproducing a spherical hologram are provided. According to an embodiment of the present invention, the device for reproducing a hologram comprises: a holographic recording medium in which holographic content is recorded in a holographic medium coated on the surface of a spherical frame; and a light source for irradiating the holographic recording medium with reference light to reproduce the holographic content recorded in the holographic recording medium. Accordingly, by manufacturing and reproducing a spherical holographic recording medium viewable from all directions, rather than a conventional frame-type holographic recording medium in a flat rectangular frame shape viewable from almost only one direction, it is possible to maximize the realism of a hologram and expect quality improvement in various application services for exhibition, UI, industry, etc.

This invention belongs to the field of projection display technology, specifically disclosing a holographic optical element, including a substrate and a holographic recording layer disposed on the substrate. The holographic recording layer is made of holographic optical material, and a polarization hologram is recorded within the holographic optical material. This invention provides a holographic optical element primarily used in polarization recovery systems in fields such as laser display, optical projection, and polarized illumination. It is used to convert S-light in partially polarized light output from a laser into P-light, achieving polarization unification, thereby improving light energy utilization and solving the problems of large size, complex fabrication, and high cost of existing polarization recovery schemes.

The invention discloses a multifunctional multi-object dual-channel image differential multiplexing method and device, and relates to the technical field of optical information processing and holographic imaging. The method is characterized by comprising the following steps: modulating laser output by a monochromatic light source through a structured light generation device to generate N structured light fields with different complex amplitude distributions; taking the N structured light fields with different complex amplitude distributions as reconstruction light, and enabling the reconstruction light to enter a hologram carrying M pieces of object frequency spectrum information for modulation to obtain an emergent light field; the hologram loaded with the M object frequency spectrum information is pre-produced and generated in a holographic recording or computer-generated hologram mode; fourier transform is carried out on the emergent light field, and M * N spatial differential images of the M objects are obtained. The invention provides a novel and convenient-to-implement Fourier transform holographic method for spatial large-scale parallel differential operation, the multiplexing scale is greatly improved, and the flexibility and operability of spatial differential multiplexing are remarkably improved.

The application belongs to the technical field of information security, and relates to a VPX-based security monitoring method and device, electronic equipment and a storage medium, the method comprising: collecting multi-source heterogeneous sensor data, and preprocessing the multi-source heterogeneous sensor data to obtain system health data; establishing a trusted chain with a TCM trusted cryptographic module as a trust root to obtain a trusted measurement result; performing multi-level decision and real-time fault disposal through a hierarchical decision model according to the system health data and the trusted measurement result; constructing an independent management channel physically or logically isolated from business data; holographically recording and tracing the system running state; and predicting the remaining life and failure probability of components through a machine learning model based on historical operation data and the current state of the system, and triggering preventive maintenance or dynamic reconstruction. The application has high reliability, strong real-time performance, security and trustworthiness, holographic traceability, intelligent prediction and flexible adaptation.

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.

This application belongs to the field of functional materials, and more specifically, relates to a holographic polymer-dispersed nanoparticle material and its applications. The holographic polymer-dispersed nanoparticle material provided in this application, through the design of the photoinitiator structure and its compounding with holographic recording monomers and nanoparticles, can improve the photosensitivity of the holographic polymer-dispersed nanoparticle material, while effectively increasing the processing efficiency and rapidly preparing the holographic polymer-dispersed nanoparticle material. This application enables the preparation of holographic polymer-dispersed nanoparticle materials with short holographic coherence exposure times (e.g., 0.01~5 s) and low holographic coherence exposure doses (e.g., 0.1~10 mJ / cm²). 2 Under the conditions of [condition], holographic polymer-dispersed nanoparticle materials with a photosensitivity greater than or equal to 100 cm / mJ were prepared, which are suitable for high-end anti-counterfeiting, information storage, virtual reality, augmented reality and other fields.

The invention relates to the technical field of optical encryption, and discloses a holographic encryption and decryption system based on a neuromorphic optical reserve pools, which comprises a holographic recording subsystem, a neuromorphic optical encryption subsystem and a machine learning decryption subsystem, and is characterized in that the holographic recording subsystem is used for generating an original hologram of a three-dimensional object to be encrypted; the method comprises the following steps: acquiring an original hologram, converting the original hologram into a time sequence holographic signal, inputting the time sequence holographic signal into a neuromorphic optical encryption subsystem, completing nonlinear dynamic encryption of the time sequence holographic signal, generating a ciphertext hologram, inputting the ciphertext hologram into a machine learning decryption subsystem, and recovering a decryption hologram from the ciphertext hologram. The invention further discloses a holographic encryption method based on the neuromorphic optical reserve pool.

The invention discloses a red-sensitive holographic photopolymer based on an acrylate-acetate copolymerization system and a preparation method of the red-sensitive holographic photopolymer. According to the method, the influence of exposure and post-processing parameters on the holographic recording performance of the red-sensitive photopolymer is systematically studied, the diffraction efficiency of the red-sensitive photopolymer is more than 95%, the refractive index modulation (RIM) reaches 0.03, the sensitivity (S) is 4.87 * 1cm / mJ, the spatial frequency (SF) reaches 4757 lp / mm, and the performance of the red-sensitive photopolymer is superior to that of the existing red-sensitive photopolymer; a one-step single-beam exposure method and a two-step double-beam exposure method are respectively adopted to prepare the reflective Denisyuk hologram, and the light intensity ratio of parameters is researched to obtain the high-quality hologram, so that the application potential in the fields of anti-counterfeiting, holographic three-dimensional imaging, AR display and the like is shown. According to the invention, high performance of the red-sensitive holographic photopolymer is realized, and a high-quality material and technical support are provided for related holographic application.

The application discloses a holographic recording medium and preparation and application thereof, and the holographic recording medium is characterized by comprising a high-glass-transition-temperature and high-refractive-index base, a low-refractive-index monomer and a photoinitiating system, and adding plasticizers and leveling agents according to needs; the glass transition temperature of the base is above 100 DEG C. Under the irradiation of coherent laser, the holographic recording medium has a coherent bright area, the photoinitiating system rapidly generates active centers, the low-refractive-index monomer is attacked by the active centers to initiate polymerization, the monomer in the coherent bright area is consumed, the monomer between the coherent bright area and a coherent dark area generates a concentration difference, the monomer is driven to diffuse from the coherent dark area to the coherent bright area and participate in the polymerization reaction of the coherent bright area, the plasticizers and the base move to the coherent dark area due to the increase of potential energy of the coherent bright area, and finally, the refractive index variation of the low-refractive-index coherent bright area and the high-refractive-index coherent dark area is formed, thereby generating a periodic refractive index difference.

The application provides a kind of photoinitiator, holographic polymer dispersed liquid crystal material and its preparation method and application, the above-mentioned photoinitiator is a single-component photoinitiator, which is excited after absorbing photon and homolysis generates carbon radical with initiation polymerization activity;Compared with the holographic polymer dispersed liquid crystal material of the existing multi-component photoinitiating system, the chemical reaction in the molecule of the photoinitiator in the application cannot be disturbed by additive, which is cracked after being excited, effectively improves the generation efficiency of free radical, and can realize the holographic recording process faster, greatly improves the photosensitive sensitivity of holographic polymer material, effectively simplifies the formula of holographic polymer dispersed liquid crystal material, further reduces the production cost of holographic polymer dispersed liquid crystal material.

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 application relates to the technical field of blue-sensitive photopolymer photosensitive materials, in particular to a blue-sensitive photopolymer film and a preparation method and application thereof. The blue-sensitive photopolymer film comprises the following preparation raw materials in parts by mass: 40-45 parts of writing monomers, 20-25 parts of polyester polyols, 14-16 parts of aliphatic isocyanate, 1-2 parts of blue light photosensitizer, 2-4 parts of photoinitiator, 5-10 parts of crosslinking agent, 5-10 parts of anti-oxidation inhibitor, 0.4-0.6 parts of catalyst, 0.5-0.6 parts of defoaming agent and 5-9 parts of solvent. The blue-sensitive photopolymer film has the characteristics of good moisture-proof effect, long storage time, high diffraction efficiency, high refractive index modulation, high sensitivity and low exposure energy, and is an ideal holographic recording material.

A photopolymer composition for hologram formation, comprising: a polymer matrix comprising a siloxane-based polymer and a (meth)acrylate polymer containing one or more reactive functional groups in the side chains, a holographic recording method, and an optical element are provided.

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 invention relates to a hologram recording medium, a method for manufacturing the same, and an optical element including the same. By controlling the elemental ratio of fluorine on the surface of the photopolymer layer within a specific range, the hologram recording medium can have excellent optical recording characteristics and low haze, and can provide an optical element with excellent visibility.

The invention provides an alkenyl monomer and a preparation method and application thereof, the alkenyl monomer has a structure as shown in a structural general formula G1, the alkenyl monomer is a liquid monomer with a high refractive index, so that a holographic recording medium has high sensitivity, and a recording grating has excellent properties such as high diffraction efficiency, low shrinkage, high refractive index modulation degree and the like.