16 results about "Holographic recording" patented technology

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 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.

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 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.

Disclosed herein is methods and apparatus for recording a holographic waveguide utilizing an inverted holographic master technique. In some embodiments, an apparatus for recording a holographic waveguide is provided. The apparatus may include a source of light configured to provide a recording beam; a master substrate with a non-grating modulated surface and a grating modulated surface, wherein the grating modulated surface is opposite to the non-grating modulated surface and is configured to diffract the recording beam; a bottom substrate with opposing light transmitting surfaces coated with anti-reflection coatings overlaying the grating modulated surface of the substrate and separated from the master substrate by a gap; and an exposure cell containing holographic recording material directly facing the non-grating modulated surface of the master substrate. Advantageously, the inverted holographic master technique mitigates the effects of unwanted reflected exposure light.

The present application discloses a photopolymer-based holographic recording medium, a volume holographic grating and a preparation method therefor, and a holographic device. The photopolymer-based holographic recording medium at least comprises a compound having a plurality of isocyanate reactive functional groups and a polyisocyanate-based compound, wherein the number of the isocyanate reactive functional groups is different from the number of isocyanate groups. The volume holographic grating prepared in the present application has a relatively high refractive index modulation for red, green and blue light.

The present disclosure relates to a photopolymer film comprising a substrate film and a recording layer, and having a maximum reduction rate of a predetermined band area in a graph derived from the results of photothermal infrared (PTIR) spectroscopic analysis in a thickness direction from one surface of the recording layer, a composition for forming such photopolymer film, a holographic recording medium and an optical element comprising the same.

The present invention relates to a holographic recording medium and an optical element including the same. The holographic recording medium not only has excellent optical recording characteristics, but also exhibits transparent optical characteristics and excellent reliability even in high temperature and high humidity environments.

Methods and systems for forming holographic gratings are described herein. The methods and systems may decrease the amount of haze produced during exposure of a holographic recording medium. In some embodiments, the methods and systems include a holographic recording medium; a master hologram containing a grating; and a light source and moveable deflector configured to diffract light through the master hologram into the holographic medium to form a holographic interference pattern. The moveable deflector is configured to move in a direction parallel to the extending direction of the grating. Advantageously, moving the light in this direction allows the holographic interference pattern to remain stationary while there is a spatio-temporal displacement and cancellation of unwanted intensity nonuniformities.

The present invention relates to a method for manufacturing a lens element intended to be worn in front of a wearer's eyes, the method comprising: - obtaining a lens element comprising a holographic recording medium disposed on a first surface of the lens element, wherein the holographic recording medium is configured to convert an interference pattern into a holographic optical element; - obtaining wearer prescription data at least related to the wearer's prescription; - manufacturing a second surface of the lens element based on the wearer prescription data; and - recording a holographic optical element within the holographic recording medium to provide an additional optical magnification of a signal opposite to the prescribed optical magnification to slow down the progression of abnormal refraction of the eye.

The application discloses a red light photosensitive initiation system, a photopolymer type holographic recording medium, a holographic optical element and a display device. The photopolymer type holographic recording medium comprises a film-forming resin, a writing monomer, a red light photosensitive initiation system, a chain transfer agent, a catalyst and an additive. The film-forming resin comprises a compound with multiple isocyanate reactive functional groups and a polyisocyanate-based compound. The red light photosensitive initiation system comprises a red light photosensitive dye and a co-initiator. In this way, the monomer can be efficiently initiated to polymerize, the dye can be quickly photobleached under irradiation of a corresponding wavelength, the material cost is low, and the holographic recording performance of the photopolymer is effectively improved.

The application relates to a method and device for generating an optical element of a circular polarization detector and the optical element, and the method comprises the following steps: adjusting reference light into first circular polarization light, adjusting signal light into first polarization state light, and constructing a first exposure polarization holographic interference field; generating a first intensity signal pattern in a polarization holographic recording sheet through the first exposure polarization holographic interference field; adjusting the reference light into second circular polarization light, adjusting the signal light into second polarization state light, and constructing a second exposure polarization holographic interference field; generating a second intensity signal pattern in the polarization holographic recording sheet through the second exposure interference field, generating a polarization multiplexing interference field at a preset position of the polarization holographic recording sheet, and preparing a holographic element. The optical element required by the circular polarization detector is prepared within several seconds, the polarization holographic recording sheet can adopt common holographic materials with polarization sensitivity, and the manufacturing cost is greatly reduced.

The application discloses a single-component photoinitiator, belongs to the technical field of functional materials, and can produce initiating free radicals to initiate polymerization of a holographic recording monomer after being excited. The application also discloses a holographic photopolymer material prepared by using the single-component photoinitiator, a preparation method and application thereof. The single-component photoinitiator can be used to quickly prepare the holographic photopolymer material, so as to solve the problems of a too complex photoinitiation system, low reaction efficiency and low preparation efficiency of the holographic photopolymer material in the prior art. The prepared holographic photopolymer material has a photosensitive sensitivity of greater than 100 cm / mJ. The holographic photopolymer material can be applied to high-end anti-counterfeiting, information storage, virtual reality, augmented reality and other fields.

Disclosed in the present application are a near-infrared photoinitiating system, a photopolymer-type holographic recording medium, a holographic optical element and a display device. The near-infrared photoinitiating system comprises a near-infrared photosensitive 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 a photopolymer is effectively improved.

Disclosed in the present application are a red-light photoinitiating system, a photopolymer-type holographic recording medium, a holographic optical element and a display device. The red-light photoinitiating system comprises a red-light photosensitive dye and a co-initiator. By means of the red-light photoinitiating system, monomer polymerization can be efficiently initiated, and the dye can be quickly photobleached under irradiation at a corresponding wavelength. Furthermore, the material cost is low, and the holographic recording performance of a photopolymer is effectively improved.

A composition for a holographic recording medium and a holographic recording medium. The composition for a holographic recording medium contains the following components: a base film-forming substance, an active monomer, a photoinitiator, etc. The base film-forming substance mainly serves as a mechanical support to construct a spatial network structure for the free shuttling of an active monomer, and is required to have certain rigidity and thermal stability. Tests verify that the introduction of unsaturated cyclic structures, such as a benzene ring, a naphthalene ring or a fluorene ring, into the structure can significantly enhance the rigidity and thermal stability of the material, thereby providing a robust spatial network structure for the free shuttling of the active monomer, and ensuring the display effect as a holographic recording medium.