83 results about "Refractive index matching" patented technology

The application discloses a wide-angle optical antireflection method based on equivalent gradient refractive index matching and phase angle restriction, and the method can solve the problem that some medium materials corresponding to the refractive index do not exist, so as to meet the needs of subsequent gradient refractive index matching, by selecting two medium materials with different refractive indexes and respectively controlling the thickness of the medium layers, and converting the medium layers into equivalent medium layers with different equivalent refractive indexes and equivalent thicknesses according to a transmission matrix. In addition, the change of the propagation phase is restricted by limiting the propagation angle of the incident light in the medium layer, so as to realize the insensitivity of the propagation phase to the angle change, meet the needs of wide-angle transmission enhancement, and determine the medium material corresponding to the refractive index according to the range of the propagation angle restriction. According to the above method, the medium material capable of realizing the wide-angle optical antireflection can be quickly selected, and the time cost required for selecting the medium material is greatly shortened.

The invention relates to a method for rapidly transparentizing biological tissues, which comprises the following steps: carrying out degreasing treatment on a fixed biological tissue sample by using a degreasing solution which is an aqueous solution containing tetrahydrofuran and tetrahydroxypropyl ethylenediamine (EDTP); the degreased biological tissue sample is subjected to refractive index matching with a refractive index matching solution, transparency treatment is completed, and the refractive index matching solution is an aqueous solution containing urea, iohexol and EDTA. According to the method for transparentizing the biological tissue, visceral organs can be transparentized quickly, tissue shrinkage is not caused, and the tissue form is reserved. In addition, the method for transparentizing the biological tissue according to the invention has the advantages of fluorescence protection, morphology retention and high biological safety.

The invention relates to a high-gloss polycarbonate fiber-added composite material and a preparation method thereof. The material comprises the following components in parts by weight: 100 parts of polycarbonate resin, 15-35 parts of PMMA coated modified glass fiber and 1.5-3 parts of a refractive index matching agent, wherein the refractive index difference delta n between a coating layer and a matrix is less than or equal to 0.02. Glass fibers are subjected to surface treatment by adopting a melting mechanical coating method, molding is performed through a double-screw extruder side feeding process, the screw shear strength is in gradient change in the axial direction, and the shear rate ratio of a strong shear area to a low shear area is larger than or equal to 4: 1. The technical problems that glass fiber reinforced polycarbonate is low in surface glossiness and serious in floating fiber are solved, the 60-degree-angle glossiness of a product is larger than or equal to 92 GU, the tensile strength is larger than or equal to 110 MPa, and the surface floating fiber rate is lower than 2%. The preparation method is environment-friendly, free of solvent discharge, stable and reliable in process and suitable for high-end application fields such as consumer electronics shells.

The application relates to a high-definition flexible optical film and a preparation method thereof. PET master batches, PEN master batches, flexible polyester elastomers and a nano composite dispersion liquid are subjected to melt extrusion, asynchronous bidirectional stretching, in-situ heat relaxation and cooling and winding to obtain the optical film, wherein the nano composite dispersion liquid comprises mCNC, SEBS, SA-BaSO4 and ethylene glycol. The application effectively reduces light scattering and greatly improves high-definition optical performance by using refractive index matched modified nano barium sulfate and highly dispersed modified nano cellulose crystals; the modified nano cellulose crystals improve the high compatibility and thermal stability of the PET base material, so that the PET base material can effectively transfer and disperse stress; SEBS and the composite flexible polyester elastomer synergistically toughen, internal stress is released and a flexible microstructure is constructed by combining the asynchronous stretching and heat relaxation process, so that the film is endowed with super-flexibility; the components have good compatibility, the film size is stable, and there is no rainbow stripe.

The application discloses an optical fiber device, a preparation method of the optical fiber device and a coupling device, and belongs to the technical field of micro-nano photonics. The application sequentially arranges a mode field expansion area and a phase modulation area at an exit end of an optical fiber, uses the mode field expansion area to expand a beam mode field diameter, uses a substrate film matched with the mode field expansion area in refractive index and a micro-nano unit with high refractive index to form the phase modulation area, realizes a target phase distribution based on geometric sizes and / or a rotation angle of the micro-nano unit, and then performs phase modulation and wavefront shaping on the expanded beam, so as to output a target light field such as a focused beam, a collimated beam, a Bessel beam or a Bessel beam array. The optical fiber device can realize high coupling efficiency, high alignment tolerance and multi-functional wavefront regulation at the exit end of the optical fiber, can solve the mode field mismatch problem in optical fiber-chip coupling, can reduce system complexity and realize multi-functional integration.

The application discloses a laser protection plate and a preparation method thereof. The provided laser protection plate comprises a reflection layer, a scattering layer, an absorption layer, a heat dissipation layer and a substrate layer which are sequentially stacked; wherein the reflection layer comprises a distributed Bragg reflection film formed by alternately depositing a high refractive index material and a low refractive index material; the material of the scattering layer comprises a first substrate and stearic acid-coated first scattering agents and stearic acid-coated second scattering agents dispersed in the first substrate; the material of the absorption layer comprises a second substrate and polyvinylpyrrolidone-modified composite nano-absorbing agents dispersed in the second substrate; the material of the heat dissipation layer comprises a third substrate and a heat dissipation agent modified by a dispersing agent dispersed in the third substrate; and the side surface of the substrate layer is provided with a microchannel structure. The laser protection plate provided by the application has a gradually changed refractive index matching between layers, and the interface reflection loss is reduced.

The invention discloses a method for regulating and controlling the high refractive index of photosensitive resin, which comprises the following steps: adding a refractive index regulator into a photosensitive resin system at 10-25 DEG C, and carrying out ultrasonic treatment to obtain a photosensitive resin composition; the refractive index regulator is alkyl orthosilicate and / or tetraalkyl titanate; curing the photosensitive resin composition through ultraviolet irradiation, and adjusting curing parameters to calibrate the refractive index of the photosensitive resin composition. According to the photosensitive resin composition and the method for regulating and controlling the high refractive index of the photosensitive resin, provided by the invention, the raw material components are simple, the preparation is convenient and fast, the regulation and control of the high refractive index of 2.0 or above can be realized through the regulation and control effect of the refractive index regulator, and the refractive index matching requirements of different optical scenes are met.

An imaging system for a portable electronic device includes a variable aperture between a lens group and an image sensor. The variable aperture is defined by an electrochromic stack that defines a switching region and a central non-switching region. The non-switching region can be etched through the same material or set of materials defining the switching region and is backfilled with a dielectric transparent material having an index of refraction substantially equal to an average index of refraction of the layer(s) of the switching region of the electrochromic stack. This construction substantially reduces visible light absorption of the variable aperture.

This application discloses a laser hidden dicing method and a wafer. The laser hidden dicing method includes: bonding individual crystal pillars to be processed in an array to a first surface of a transparent substrate using a refractive index matching adhesive; flipping the transparent substrate with the bonded crystal pillars so that a second surface of the transparent substrate faces upwards, using the second surface as a reference plane for laser incidence; the second surface being the surface opposite to the first surface; controlling a laser beam corresponding to each crystal pillar to be incident from the reference plane, sequentially passing through the transparent substrate and the refractive index matching adhesive, and focusing on the interior of the corresponding crystal pillar for laser modification; wherein, the refractive index matching adhesive is also used to reduce the refractive index difference at the crystal pillar bonding interface. Through the above method, the laser hidden dicing method provided by this application can perform parallel and efficient processing of polycrystalline pillar samples with highly inconsistent results, reduces the requirements for the surface roughness of each crystal pillar, saves pre-processing time for the crystal pillars, and greatly improves processing efficiency and quality.

The present application belongs to the technical field of intelligent coating, and relates to a composite coating material with fluorescent self-indication function for micro stress detection and a preparation method and application thereof. The present application realizes high sensitivity detection of micro cracks by adding fluorescently labeled microcapsules capable of breaking at the crack and releasing fluorescent dyes at the fixed point, and effectively avoids the adverse effects of microcapsule introduction on the transparency and flexibility of the coating through refractive index matching, particle size optimization and film thickness design, thereby being suitable for early warning of corrosion risk of various substrates, providing sufficient window period for equipment maintenance and coating repair, and significantly improving the safety and reliability of the protective coating.

The invention relates to the technical field of photovoltaics, in particular to an all-black back contact battery and a preparation method and application thereof. The all-black back contact battery sequentially comprises a black frame, a black back plate, a back contact battery piece layer, a black passivation anti-reflection layer, a black packaging adhesive film layer, an anti-reflection coating and a transparent cover plate which are arranged in a stacked mode from bottom to top. Wherein the black passivation anti-reflection layer sequentially comprises an Al2O3 layer, a SiNx layer and a black nano-composite layer from bottom to top, and the Al2O3 layer, the SiNx layer and the black nano-composite layer are arranged in a stacked mode. And a texture structure is arranged on the surface of one side, far away from the antireflection coating, of the transparent cover plate. According to the all-black back contact power supply, through full-link refractive index matching and micro-nano structure design, ultra-uniform all-black appearance, extremely low light reflection, long-time weather resistance stability and personalized appearance adaptation are synchronously realized, high-efficiency power generation and high reliability are not affected, and high-end BIPV scene requirements are comprehensively met.

An integrated electro-optical non-reciprocal mode converter based on birefringent crystal refractive index matching comprises a chip, the upper layer of the chip is an electro-optical material film with birefringent characteristics, a mode converter is prepared on the electro-optical material film, and the mode converter is a two-port device; the first port is used for receiving an input optical signal of a mode 1 and allowing the optical signal to enter the mode converter; and the second port is used for outputting the converted optical signal in the mode 2. The refractive index difference of a birefringent material to a transverse electric mode (TE) and a transverse magnetic mode (TM) is utilized to realize the pre-coarse matching of the refractive indexes of TE and TM modes, and then the fine matching of the refractive indexes and wave vectors is realized in combination with electro-optical modulation, so that the integrated electro-optical mode converter insensitive to the process is realized. The device is simple in structure and has a wide application prospect.

This utility model relates to a wavelength division multiplexing (WDM) optical device, comprising: a substrate having opposing first and second grooves; a plurality of filters disposed within the first groove; a transparent filling medium filling the first groove, enclosing the filters, wherein the refractive index of the transparent filling medium matches that of the filters; and a plurality of lenses located at the bottom of the second groove, wherein the positions of the plurality of lenses correspond one-to-one with the positions of the plurality of filters. In this WDM optical device, the transparent filling medium enclosing the filters and matching the refractive index of the transparent filling medium to the filters, using a transparent filling medium with a refractive index matching that of the filters as the environmental medium, can avoid optical path misalignment, eliminate the need for additional structural adjustments to the filter positions, and simplify the structure of the WDM optical device.

The application provides a stress measuring device for glass and an optical element, wherein: a light emitting unit is used for emitting laser light; the optical element comprises a first surface and a second surface, a laser light emitting direction of the light emitting unit is towards the first surface, the second surface is in contact with the glass to be measured, a collecting unit is used for collecting scattered light and processing the scattered light into a data signal; a processing unit is used for determining a stress distribution in the glass to be measured according to the data signal; wherein a plurality of support pieces and a gasket are arranged on the second surface, and the plurality of support pieces are arranged around the gasket. Thus, a matching refractive index liquid can be arranged between the prism and the glass to be measured, a small amount of the refractive index liquid is used to complete the measurement, the refractive index deviation between the laser passing through three media is reduced, the light loss caused by the interface is reduced, and the relative sliding of the glass to be measured caused by the refractive index matching liquid during the measurement is avoided, thereby solving the problem of inaccurate measurement.

The invention discloses a tensile induced dual-mode response optical elastomer and a preparation method and application thereof, and belongs to the technical field of optical anti-counterfeiting materials. The invention designs and prepares an optical elastomer compounded by CaF2: Ce < 3 + >, Tb < 3 + > hollow nanospheres and polydimethylsiloxane. Based on interface refractive index matching regulation and control of CaF2: Ce < 3 + >, Tb < 3 + > hollow nanospheres and a PDMS matrix, the optical elastomer shows synchronous transparency and photoluminescence intensity response performance in a mechanical deformation process. Through systematic experimental analysis, an optical signal regulation and control mechanism induced by mechanical deformation is clarified, and the regulation and control rule of structural parameters of the CaF2: Ce < 3 + >, Tb < 3 + > hollow nanospheres on optical signals is disclosed. Finally, by designing an optical anti-counterfeiting model, the application potential of the optical anti-counterfeiting model in the anti-counterfeiting field is proved.

This invention relates to a system and method for measuring the internal flow field of film cooling holes in aero-engine blades based on refractive index matching. The system includes a main flow section, a transparent material body below the main flow section, and film cooling holes embedded within the transparent material body. Cooling fluid flows through the film cooling holes. A laser is positioned above the main flow section, and a high-speed camera is positioned outside the transparent material body. The irradiation range of the laser and the imaging range of the high-speed camera both cover the internal channel region of the film cooling holes. The measurement method includes: introducing the main flow medium into the main flow section, introducing the cooling fluid into the film cooling holes, irradiating the flow field region inside the film cooling holes with a laser beam, and continuously acquiring images of the flow field region using the high-speed camera. Compared with existing technologies, this invention overcomes the optical limitations of traditional methods in measuring complex channels and near-wall regions, significantly improving the visualization and measurement level of the flow structure inside film cooling holes.

The invention discloses an enhanced TFT alkali-free glass substrate and a preparation process thereof, and belongs to the technical field of glass. According to the invention, by optimizing the components of the glass matrix and the concentration gradient regulation strategy of the nanowires, the refractive index matching of the Ni-TiSMA nanowires and the glass matrix is realized, and the visible light transmittance of the substrate is kept to be 91% or above, so that the problems of light scattering and transmittance reduction caused by refractive index difference in the prior art are solved, and both the mechanical strength and the thermal stability are improved. Specifically, by accurately controlling the distribution gradient and surface modification of the nanowires in the glass substrate and the synergistic effect of the nanowires and the glass substrate, the applicability of the glass substrate in the high-end display field is improved, the strict requirements of a large-size, high-resolution and light and thin display technology for the performance of the substrate are met, and by means of an innovative preparation process, the glass substrate can be manufactured into a large-size, high-resolution and light-thin glass substrate. Precise control over gradient distribution of the nanowires is achieved, and a feasible scheme is provided for large-scale production of high-performance TFT alkali-free glass substrates.

This invention discloses a high-filling, high-transmittance plant fiber composite material and its preparation method, belonging to the technical field of plant fiber composite materials. The preparation method first involves treating the plant fibers with chemical reagents to remove lignin and bleach them; then pressing the treated fibers into fiberboards using a paper pattern forming machine; next, immersing the fiberboards in an alkaline solution for swelling and washing until neutral; then subjecting the swollen fiberboards to interface modification with a coupling agent; finally, introducing a transparent resin with a matching refractive index into the modified fiberboards through vacuum impregnation, followed by curing to form a high-filling, high-transmittance plant fiber composite material. This method achieves high filling of transparent resin and possesses numerous advantages such as being green, simple to prepare, low-cost, high-transmittance, and low-haze.

The invention discloses a colored fiber blended yarn and a preparation process thereof, and relates to the technical field of textile yarns, the colored fiber blended yarn is composed of a first colored fiber and a second colored fiber which are mutually twisted and cohered, the first colored fiber is a cellulosic fiber, and the second colored fiber is a polyester fiber; a layer of antistatic hyperchromic film formed by in-situ thermal crosslinking is attached to the fiber surface and the fiber gaps of the blended yarn, and the antistatic hyperchromic film is prepared by demulsifying and crosslinking amphiphilic hyperbranched polysiloxane nano-emulsion under the heat setting condition. By constructing an anchoring network with both chemical bonding and physical entanglement, the washing fastness and anti-pilling capacity of the yarn are improved, meanwhile, by means of refractive index matching and a conductive structure, the color and luster of the yarn are improved, the frost white phenomenon is eliminated, the long-acting anti-static performance is achieved, and the physical performance and appearance are improved.

An eye protector includes a lens configured to protect the wearer from projectiles, and an optically clear stack attached to the lens. The stack can have one or more removable layers. The eye protector also includes an optically clear dry mount adhesive layer attaching the stack to the lens. The dry mount adhesive may be self-wetting to attach the stack to the lens so that air between the stack and the lens can be removed after the stack is attached and / or adhered to the lens, for example, by applying pressure across the surface of the stack. The refractive indices of the lens, the dry mount adhesive, and each removable layer are matched to within about 0.2.

The application discloses a micro structure for improving light efficiency and stability of a Micro LED matrix headlamp and a preparation method thereof. The micro structure comprises an N-side ITO current expansion layer of a Micro LED chip unit, a conical hole structure arranged in a periodic misplacement manner is arranged in the N-side ITO current expansion layer, the etching depth is 50% of the total thickness of the ITO layer, and a continuous ITO conductive layer is reserved at the bottom; the surface of the ITO layer is entirely covered with a SiO2 passivation buffer layer; a three-dimensional current expansion network is formed through the misplacement hole structure, the current distribution is optimized, the total reflection is reduced by breaking the smooth interface, the step refractive index matching is realized in combination with the SiO2 layer, the light extraction efficiency is greatly improved, the surface roughness and the surface area are improved through the hole structure, the adhesion of the fluorescent powder is enhanced, the passivation protection is realized through the SiO2 layer, and the stability and the service life of the device in a vehicle-mounted wide-temperature vibration environment are significantly improved.

The invention provides a nanostructure layer, a color filter structure including the same and a manufacturing method thereof. The nanostructure layer includes a nanolight pillar structure and a first optical structure disposed on the nanolight pillar structure. The nano light pillar structure comprises a nano light pillar and a communication cavity surrounding the nano light pillar, and the first optical structure comprises a first refractive index matching layer.

The invention relates to the technical field of semiconductors, and discloses an infrared image enhancement method and system.The method comprises the steps that a layer of refractive index matching medium is temporarily applied to the surface of an observation area of a covering layer of a sample to be detected, and a refractive index matching medium layer is formed; the sample to be tested at least comprises a semiconductor substrate and a covering layer covering the semiconductor substrate; when the infrared light source irradiates the refractive index matching medium, the infrared imaging objective lens is optically matched with the refractive index matching medium layer to form a variable light path; and performing image acquisition on the observation area by using the infrared camera through the variable light path to obtain a detection image of the to-be-detected sample. Through refractive index matching, Fresnel reflection loss of a covering layer and an air interface and scattering caused by surface roughness are greatly reduced, incident light can enter and leave a sample more efficiently, negative effects of the covering layer are overcome, and infrared imaging definition is improved.

The application provides a composite flame retardant, a preparation method and application thereof, and ultraviolet light curing paint, and relates to the technical field of flame retardants.The composite flame retardant provided by the application has a structure of "core-silica outer core layer-shell", wherein the first organic silane coupling agent in the core is grafted and bonded with zinc borate and aluminum hypophosphite, so that the two are uniformly dispersed;the refractive index of the silica outer core layer is between the core and the resin, thereby playing the role of a transition layer of refractive index matching, reducing light scattering at the interface, and improving transparency;the second organic silane coupling agent can form a covalent bond with the silica outer core layer, and the carbon-carbon double bond thereof can participate in the copolymerization reaction of the resin;there is no clear physical boundary between the composite flame retardant and the resin, light scattering caused by the discontinuity of the refractive index and the interface defects is reduced, and the optical transparency and the flame retardant efficiency of the coating layer formed by using the composite flame retardant provided by the application as the flame retardant of the ultraviolet light curing paint are excellent.

Embossing resins, methods of manufacturing such resins, and electrokinetic display system, which includes display cells containing such resins. The resins include a fluoropolymer in weight percentage 5%-60%, a difunctional diluent in weight percentage 0-30%, a monofunctional diluent in weight percentage 0-40%, a urethane diacrylate or functionalized nanoscale material, e.g., a functionalized urethane material, in weight percentage 5-50%, a photoinitiator in weight percentage 0.5-5%, and a surfactant in weight percentage less than 0.5%. The difunctional diluent may be Hexanediol Diacrylate, and the monofunctional diluent may be a monofunctional hydrocarbon. The resins are made by identifying a target index of refraction for a cured state thereof, and combining together, by weight percentage, the constituent components to produce the liquid state version of the embossing resin having a desired composite index of refraction.

This invention relates to the field of optical materials technology, providing an optical matching adhesive, a grating device, and a preparation method. By mass, it comprises the following components: 1-5 parts of UV initiator, 1-5 parts of thermosetting initiator, 15-30 parts of a first monomer, 25-35 parts of a second monomer, 25-40 parts of a third monomer, 1-3 parts of a coupling agent, 5-8 parts of a tackifier, and 1-2 parts of a leveling agent. The first monomer is a monofunctional acrylate monomer, the second monomer is a difunctional acrylate monomer, and the third monomer is a polyfunctional acrylate monomer. Advantages: Through the synergistic effect of material compatibility design, optical refractive index matching, rapid curing kinetics control, and interfacial chemical bonding, an optical matching adhesive layer is formed in the non-grating region. This layer is optically equivalent to glass, compatible and immiscible with H-PDLC materials, cures faster than the diffusion rate of H-PDLC materials, and exhibits reliable adhesion.

The invention discloses a thermochromic coating film and a preparation method thereof, and relates to the related field of composite films. The medium matching layer and the protection layer are arranged on the two sides of the VO2-based thermochromic layer respectively, collaborative optimization of the thermochromic performance, the optical interference effect and the environmental stability is achieved, the medium matching layer can accurately regulate and control film system refractive index matching and reflection interference, and the high-chromatic-aberration reversible color development effect is achieved; after the VO2-based color-changing layer is doped and modified, the phase-change temperature can be reduced to 35-45 DEG C, so that the application range in a room-temperature environment is effectively expanded; the introduction of the protective layer significantly improves the wear resistance and oxidation resistance of the film layer, so that the film layer still maintains stable cycle performance in high-temperature, high-humidity and other environments.

Provided herein is a method for preparing a castable flow cell body (120) of a flow cell unit (100), for imaging by light microscopy a sample under flow comprising at least one multicellular construct suspended in a sample carrier liquid, the method comprising: - adding a casting substance in a pourable state to a moulding cavity (222) of a mould assembly (200) configured for moulding the castable flow cell body (120) and a flow cell channel (140) in the castable flow cell body (120); - allowing or inducing the casting substance to reach a set state; and - releasing the castable flow cell body (120) so formed from the moulding cavity (222); wherein the castable flow cell body (120) in the set state has a refractive index matching a refractive index of the sample carrier liquid.

The application relates to an AR-HUD adaptive AZO / graphene composite gradient target material and a preparation method thereof. The composite gradient target material is a three-layer composite structure, and from a bottom layer to a top layer, the three-layer composite structure is sequentially an AZO matrix layer, a graphene doped layer and a nano-silver reinforced layer, and a resistivity gradient is formed along the thickness direction of the target material. The graphene doped layer effectively improves the conductive stability of the target material and a plated film layer, the nano-silver reinforced layer optimizes the infrared blocking performance and the refractive index matching degree, and the problems of existing target material projection ghosting and glare are solved.