746 results about "High index" patented technology

The invention discloses a high-refractive-index nano-composite optical adhesive and a preparation method thereof, and belongs to the technical field of optical transparent adhesives. The optical adhesive is prepared by taking a polyurethane acrylate oligomer with a specific structure as matrix resin, introducing surface-modified barium titanate and zirconium oxide core-shell nanoparticles as a functional filler, and matching with an active diluent, a photoinitiator and a silane coupling agent in a specific proportion. Through the design of the core-shell structure, the core problems that the high-refractive-index nanoparticles are easy to agglomerate in an organic resin matrix, the dispersion stability is poor and the bonding force with a matrix interface is weak are effectively solved. The prepared optical adhesive has a refractive index of more than 1.65, a light transmittance of more than 99% and a haze of less than 0.3% after being cured, has excellent bonding strength, weather resistance and long-term use stability, and is especially suitable for precise lamination of high-end display devices (such as OLEDs (Organic Light Emitting Diodes) and micro-lens arrays).

The invention relates to an optical monomer and a preparation method and application thereof, the structural general formula of the optical monomer is as follows: R1, R2 and R3 are respectively selected from one of hydrogen and C1-C4 alkyl, A1 is selected from one of hydrogen and C1-C4 alkyl, and A2 is C1-C4 alkyl; r4 is selected from one of H, phenyl and C1-C4 alkyl, and A2 is C1-C4 alkyl; and R5 is hydrogen or methyl. The optical monomer provided by the invention contains a (methyl) acrylate group, and has the properties of high refractive index and low volume shrinkage; and a plurality of aromatic rings with high molar refractive index and low molar volume are contained, so that the whole molecule of the whole monomer is extremely high in refractive index. 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 relates to the field of optical display and material engineering, in particular to a silica gel integrated optical film with a 3D light splitting function and a manufacturing method of the silica gel integrated optical film. A silica gel integrated optical film with a 3D light splitting function comprises a transparent optical base material and a microstructure layer, and the microstructure layer is combined on the surface of the transparent optical base material in an integrated forming mode. And the microstructure layer is an anhydrous silica gel-resin composite material obtained by combining organic silica gel with low refractive index and resin with high refractive index through an anhydrous chemical reaction system. The optical film obtained in the invention has excellent interface bonding stability and long-term reliability, the overall thickness of the optical film is small, the optical loss is reduced, the light transmittance is higher, and the overall transmittance can reach 93% or above. And the manufacturing process integration degree and the mold repeated utilization rate are high, the industrial batch production requirement can be met, and the excellent industrial application prospect is achieved.

The invention belongs to the technical field of visible light detection, and aims to realize accurate detection of multicolor visible light and monolithic integration of a multi-wavelength receiver. The invention provides a fully-integrated multicolor visible light detector based on a sub-wavelength polycrystalline silicon grating, which comprises three detectors capable of selectively detecting blue, green and red signals respectively. The principle is as follows: a one-dimensional sub-wavelength polycrystalline silicon grating in the multicolor detector is embedded in an upper SiO2 layer and a lower shallow trench isolation region to form a dielectric waveguide structure of which the middle is a high-refractive-index medium and the periphery is a low-refractive-index oxide layer. The period and the grating width of the sub-wavelength grating are changed, so that the incident polarized light and the sub-wavelength periodic structure are strongly coupled to cause a guided-mode resonance effect, and the sub-wavelength grating can be applied to a transmission optical filter. The size and the cost of the multicolor visible light communication system can be effectively reduced, and the data transmission rate of the system is greatly improved.

The invention relates to a film system structure for partitioned film coating. The film system structure comprises a glass substrate, a first film stack and a second film stack, the first film stack is formed by alternately depositing a medium-refractive-index material and a low-refractive-index material in a vacuum chamber, the film system design structure of the first film stack is SUBM + L +... + M + LAir, SUB represents a substrate, M represents a medium-refractive-index material film layer, L represents a low-refractive-index material film layer, and Air represents air; the second film stack is a film stack formed by alternately depositing a high-refractive-index material and a low-refractive-index material in the vacuum chamber, the film system design structure of the second film stack is SUB first film stack + H + L... + H + LAir, SUB represents a substrate, H represents a high-refractive-index material film layer, L represents a low-refractive-index material film layer, and Air represents air. Compared with the prior art, the method has the advantages of reducing the manufacturing cost, improving the boundary definition and the like.

Systems and methods are provided for waveguides structures with meta-optical structures for routing light between layers. An example method for manufacturing a waveguide structure with meta-optical structures for routing light may include fabricating a plurality of waveguide layers and adding one or more points of redirection where redirection of a light beam may occur. The points of redirection may be added by generating divots and adding meta-optical structures. The points of redirection may be interconnected via a high index optical material to efficiently route light between different waveguide layers and components. The points of redirection may also be configured to split or combine different polarizations of the light beam.

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 provides an organic electroluminescent material and an organic electroluminescent device, and belongs to the field of organic electroluminescent materials, and the organic electroluminescent material has a structure as shown in a formula I. The organic electroluminescent material has low refractive index, and can be used as a luminescent auxiliary material and applied to a thicker layer in a double-layer luminescent auxiliary material, so that the organic electroluminescent material can be used as a light-emitting auxiliary material. The light emitted from the device passes through the low-refractive-index film layer of the formula I, the organic electroluminescent device prepared by matching the low-refractive-index film layer with the high-refractive-index light-emitting auxiliary material can play a better light gathering role, the light with the specific wavelength in the light emitted from the device is emitted out, the emission spectrum can be narrowed, the light-emitting intensity of the light with the specific wavelength is enhanced, and the light-emitting efficiency of the organic electroluminescent device is improved. The light loss is reduced, the luminous efficiency of the device is improved, and meanwhile, the lower driving voltage and the longer service life of the device are ensured.

To provide a display device that can reduce the decrease in contrast. [Solution] A display device comprising a first substrate and a second substrate facing each other, and a liquid crystal layer provided between the first substrate and the second substrate, wherein the first substrate has a first light-transmitting layer having adjacent first convex lens portion and second convex lens portion, a second light-transmitting layer provided on the opposite side of the first light-transmitting layer from the liquid crystal layer, having a first concave lens portion overlapping with the first convex lens portion and a second concave lens portion overlapping with the second convex lens portion in a plan view, and a high refractive index layer provided between the first light-transmitting layer and the second light-transmitting layer, wherein the thickness of the high refractive index layer in the direction normal to the first substrate is smaller than the thickness of the first convex lens portion and the thickness of the second convex lens portion.

The invention belongs to the technical field of optical thin film design and preparation, and particularly relates to a preparation method of a multilayer composite antireflection film on the surface of an optical lens. The preparation method comprises the step of sequentially performing atomic layer deposition on the surface of the optical lens to form the transition layer, the high-refractive-index layer, the low-refractive-index layer, the high-refractive-index layer and the packaging layer. According to the atomic layer deposition method, uniform coating can be achieved on the surfaces of aspherical lenses with different curvature radiuses, and five layers of oxide films are deposited through alternating pulse in an ALD pulse sequence with the structure of'substrate layer-transition layer-high refractive index layer-low refractive index layer-high refractive index layer-packaging layer '. And an excellent antireflection effect in a visible light wavelength range is realized. The atomic layer deposition is carried out at low temperature (25-150 DEG C), so that the atomic layer deposition can be directly coated on the high-molecular polymer lens, and the deformation of the base material due to high temperature is avoided; the method is especially suitable for different application scenes such as consumer electronics, personal protection and medical assistance.

The invention relates to the technical field of optoelectronic devices, and discloses a monolithic integrated full Stokes polarization detector and a preparation method thereof. The full Stokes polarization detector comprises a plurality of PIN photodiodes, a transparent conductive layer formed on the PIN photodiodes, a titanium oxide metasurface structure formed on the transparent conductive layer, a top electrode formed on the transparent conductive layer and a bottom electrode formed at the bottom of the PIN photodiodes. The titanium oxide metasurface structure comprises six metasurface pixels, and the six metasurface pixels are in one-to-one correspondence with the PIN photodiodes. According to the invention, the characteristic of high refractive index of titanium oxide from visible light to near-infrared band is utilized, and six titanium oxide metasurface units are designed and are integrated with the silicon-based PIN photodiode monolithic, so that full Stokes parameter detection of incident light in any polarization state is realized.

To deposit nanolaminates on a substrate, the substrate is mounted in a vacuum recipient on a substrate support in a peripheral region of a holder. The recipient comprises a sputter station with a sputtering target and a plasma treatment station with a plasma source, wherein the sputtering target and the plasma source are directed to different sections of the holder. A sputtering gas is introduced into the recipient, a reactive gas is introduced into the sputter station and the plasma treatment station, a magnetron discharge is ignited in the sputter station, and a plasma is ignited in the plasma treatment station. By rotation of the holder, the substrate is successively exposed to the magnetron discharge to deposit a well layer of high refractive index material having a layer thickness between 0.1 nm and 6 nm and to the plasma to produce a layer of low refractive index material.

An optical device includes a membrane. The membrane includes a plurality of apertures extending at least partially through a thickness of the membrane. The membrane is configured to structure incoming light having a wavelength to produce modified light. The wavelength of the incoming light is in a range of a wavelength of X-ray light to a wavelength of ultraviolet light. The membrane can be configured to transmit the modified light through the membrane. The membrane can be configured to reflect modified light away from the membrane. An index of refraction within a first aperture of the plurality of apertures is greater than an index of refraction of the membrane.

The invention discloses a high-refractive-index photo-thermal dual-curing optical adhesive and a preparation method thereof, and belongs to the technical field of high polymer materials, and the preparation method comprises the following steps: S1, preparation of high-refractive-index resin: placing biphenyl-4, 4 '-dithiol in a nitrogen atmosphere reaction kettle, adding a free radical thermal initiator, heating to 180-200 DEG C, reacting for 1-2 hours, and cooling to room temperature to obtain the high-refractive-index resin; dropwise adding alkenyl resin under the protection of nitrogen, stirring, reacting for 1-2 hours after dropwise adding, and cooling to room temperature to obtain high-refractive-index resin; s2, preparation of the optical adhesive: mixing the alicyclic epoxy resin, the high-refractive-index resin, the toughened resin, the liquid epoxy resin, the cationic photoinitiator and the cationic thermal initiator, and uniformly stirring in a dark place to obtain the adhesive. The problems that a traditional optical adhesive is poor in optical performance stability and unbalanced in mechanical and optical performance are solved. The application potential of preparing the high-performance optical adhesive is realized.

The utility model discloses a reflecting mirror applied to high-power laser, which comprises a base material structure layer, a reflecting dielectric film structure layer is arranged on the reflecting surface of the base material structure layer in a film coating mode, and the reflecting dielectric film structure layer is composed of 46 layers of high-refractive-index film structures and 46 layers of low-refractive-index film structures which are alternately overlapped from inside to outside. The reflector applied to the high-power laser can obtain high reflectivity in the application scene of the high-power laser under the working wave band of 915 + / -10nm, 976 + / -10nm or 1064 + / -10nm. Meanwhile, the dielectric film of the reflector is extremely low in laser absorptivity, and energy loss can be effectively reduced.

The invention relates to the technical field of holographic gratings, in particular to a holographic grating with a high refractive index modulation degree and a preparation method thereof, and the preparation method comprises the steps: coating a grating substrate with a precursor material to form a coating, and preparing a holographic dry plate with a holographic material layer; performing interference exposure on the holographic plate to obtain a semi-finished grating; bleaching the semi-finished product grating, and soaking the semi-finished product grating in an extraction liquid to obtain a grating precursor with a groove; and filling the groove with a fluorine-containing polymer dopant to obtain the holographic grating. The part, corresponding to the exposure bright area, of the grating precursor with the grooves is a polymer with a high refractive index, the inert body in the exposure dark area is removed, air is left, the grooves are formed in the surface of the grating, the appearance of the grooves fluctuates, the grooves are filled with low-refractive-index substances, and finally the high-refractive-index substances in the bright area are formed. The dark area is of a grating structure made of a low-refractive-index material; by adopting a two-step processing method, the holographic grating without light leakage in the reverse direction can be manufactured.

The invention discloses a surface plasmon resonance (SPR) hydrogen sensor based on an Ag / PDMS / Pt-WO3 multilayer structure. The SPR hydrogen sensor is characterized by comprising a halogen lamp light source, two sections of multimode optical fibers, a spectrometer and an SPR hydrogen sensing head, wherein the SPR hydrogen sensing head is composed of a different-core structure formed by multimode-single-mode-multimode optical fibers, a silver film, PDMS (polydimethylsiloxane) and Pt-WO3 (platinum-tungsten trioxide). The SPR hydrogen sensor based on the Ag / PDMS / Pt-WO3 multi-layer structure, which is simple to prepare, high in sensitivity and capable of being repeatedly used for a long time, is provided aiming at the defects that an existing optical fiber SPR hydrogen sensor is low in sensitivity and complex in device manufacturing, and PdH is changed from an alpha phase to a beta phase when Pd is used as a hydrogen sensitive material, so that the use of the device is influenced, and the like. When the hydrogen concentration is increased, the Pt-WO3 reacts with the hydrogen to generate heat, so that the refractive index of the PDMS film is changed, the SPR resonance spectrum is moved, and the hydrogen concentration is obtained by observing the offset of the PDMS film. The high refractive index sensitivity of SPR is brought into full play by utilizing the high refractive index change of PDMS, so that high-precision detection of hydrogen leakage is realized.

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 an all-silicon-based medium optical thin film and an all-fiber laser, and relates to the technical field of optical thin films, the number of layers of the optical thin film is 15, and the structure of the optical thin film is ML (HL) 6M; h represents high-refractive-index material silicon hydride or amorphous silicon, L represents low-refractive-index material silicon oxide, M represents high-refractive-index material silicon nitride, (HL) 6 is a 12-layer reflecting film stack, and ML and M respectively form anti-damage film stacks on two sides. On the premise that the thickness is reduced and the anti-laser-damage effect is improved, effective adaptation of a middle-infrared band pumping source is achieved, and the problems that an existing optical thin film is large in thickness, poor in anti-laser-damage effect and incapable of effectively adapting to the middle-infrared band pumping source are solved; and secondly, electric field distribution can be optimized, so that the optical thin film has more excellent spectral performance. And thirdly, the laser can be directly deposited on the optical fiber end face to serve as an endoscope, and the technical problem that an existing optical fiber laser is complex in structure is solved.

An optical filter including at least one of a high refractive index material and a low refractive index material; wherein the optical filter exhibits a reduced angle shift in at least one of a visible, near infrared, and an extreme ultraviolet wavelength is disclosed. A method of depositing a film is also disclosed.

This application relates to apparatus and methods for roll forming of high-refractive-index glass sheets. The method of forming a glass sheet includes: (a) forming a glass ribbon from molten glass using a pair of forming rollers; (b) reducing the horizontal temperature variation of the glass ribbon over 80% of its entire width before cooling to the glass transition temperature to 10°C or less; (c) controlling the cooling rate of the glass ribbon as it moves longitudinally downward in the solidification zone such that the glass ribbon has a first average cooling rate before cooling to the glass transition temperature and a second average cooling rate after cooling to the glass transition temperature, the first average cooling rate being less than the second average cooling rate; and (d) separating the glass sheet from the glass ribbon.

This micro-LED module comprises: a unit substrate; a plurality of micro-LED chips mounted on the upper surface of the unit substrate; a protection film for covering the upper surface of the unit substrate and the plurality of micro-LED chips; a black film provided on the upper surface of the protection film; and an optical material provided on the upper surface of the black film, wherein the micro-LED module, having a transparent polymer material, includes the optical material including the transparent polymer material on the upper surface of the black film, and the polymer material has a high refractive index or at least a predetermined thickness, and thus a bright line can be improved even if a gap is formed at boundaries between a plurality of micro LED modules.

The present application provides an optical glass, which contains, in terms of mole percentage, SiO2: 25-40%; B2O3: 1-8%; La2O3: 1-8%; BaO: 1-6%; CaO: 5-25%; Nb2O5: 5-15%; TiO2: 8-20%; Li2O: 1.5-15%. By containing appropriate amounts of SiO2 and alkali metal oxides and other components, the optical glass has excellent anti-crystallization performance; by containing high refractive index components such as Nb2O5 and TiO2, the optical glass has a relatively high refractive index; by reasonable component design, the glass has a relatively low relative partial dispersion.

Provided is a curable composition capable of forming a cured film having a high refractive index and good heat resistance. The present invention provides a curable composition containing titanium oxide particles and a polymerizable compound. The polymerizable compound is a compound having one or two ethylenically unsaturated bonds. The polymerizable compound has a molecular weight or a weight-average molecular weight of 3000 or less. The total content of the titanium oxide particles and the polymerizable compound is 85 mass% or more based on the total solid content of the curable composition.

To provide a pressure-sensitive adhesive composition capable of forming a pressure-sensitive adhesive sheet having a high refractive index and capable of forming a pressure-sensitive adhesive sheet more suitable for use in an image display device usable under various environments.SOLUTION: The provided pressure-sensitive adhesive composition contains at least one selected from the group consisting of a monomer component M and a polymer thereof, wherein the monomer component M contains a monomer a containing an aromatic ring and not containing a nitrogen atom, a monomer b containing a ring structure containing a nitrogen atom, and a monomer c containing a hydroxyl group. The sum of the content of the monomer (a) and the content of the monomer (b) in the monomer component M is ≥ 50 wt.%. The monomer component M contains the monomer b in an amount of 0.1 to 8 wt%.SELECTED DRAWING: Figure 1

The utility model discloses a composite multimode waveguide structure, which belongs to the technical field of optoelectronic devices and comprises a plasmon unit made of a metal material or a material with a negative real part dielectric function. The plasmon unit is structurally characterized by comprising nanoparticles, nanowires, nanopore arrays or gradient structures; the dielectric waveguide is made of a semiconductor material with a high refractive index, and the dielectric waveguide is designed to be one of a strip-shaped waveguide, a ridge-shaped waveguide or a slit waveguide; and the substrate layer is located below the plasmon unit and the dielectric waveguide and comprises at least one low-refractive-index supporting layer, and the material system of the low-refractive-index supporting layer is one of an oxide material, a nitride material, a fluoride material or a composite substrate structure. According to the scheme, the contradiction of a plasma device and silicon photonics among mode degree of freedom, loss and process compatibility is solved.

The purpose of the present invention is to provide: a polycarbonate resin that has a high refractive index, low birefringence, and a glass transition temperature that is suited to use in an optical lens; and an optical member that includes the polycarbonate resin.　This thermoplastic resin includes repeating units represented by formula (1), formula (2), and formula (3), the repeating units represented by formula (1) being 70.0–98.0 mass% of all the repeating units, and the repeating units represented by formula (3) being 0.1–3.0 mass% of all the repeating units. (In formula (1), R1–R4 each independently represent a hydrogen atom, a halogen atom, a C1–20 substituent that may include an aromatic group, or a C2–20 substituent that includes a heterocycle, and m1 and m2 each independently represent 0 or 1.) (In formula (2), n1 and n2 each independently represent 0 or 1.) (In formula (3), X represents a C4–14 alkylene group.)

The invention provides a shading film, an optical element and electronic equipment. The shading film is used for being arranged on the surface of a transparent substrate and comprises a matching layer and a light absorption layer, the matching layer and the light absorption layer are arranged in a stacked mode, the matching layer is used for being connected with the transparent substrate, the refractive index Nm of the matching layer is larger than the refractive index Na of the light absorption layer, the value range of the refractive index Nm of the matching layer is 0.85 Ns-1. 03Ns, and Ns is the refractive index of the transparent substrate. The light-vibrating film can be used for the surface of high-refractive-index glass, the reflectivity of a light-shading film is reduced, and the problems of stray light and ghosting are reduced.

A thermoplastic resin comprises a structural unit derived from a compound represented by a general formula (A), and further comprises a structural unit derived from a compound represented by a general formula (B) and / or (C), and the thermoplastic resin has the advantages of high refractive index, low water absorption, hydrolysis resistance, low temperature impact resistance and the like.

The present invention relates to an optical lens comprising a substrate and a multi-layer antireflection coating provided on at least one of the main surfaces of the substrate and comprising a stack of at least one layer having a high refractive index and at least one layer having a low refractive index, a spectral reflectance curve of the multi-layer antireflection coating for an angle of incidence in the range of 0 DEG to 15 DEG has a reflection peak centered on a wavelength in the range of 435-450 nm and having a maximum reflectance of less than or equal to 30% and a full width at half maximum of less than or equal to 90 nm, and a local reflectance minimum in the range of 380-420 nm of less than or equal to 2% and a multi-layer antireflection coating for the at least one major surface, the multi-layer antireflection coating providing the at least one major surface with: for an angle of incidence in the range of 0 to 15 degrees, the present invention relates to a light-emitting device comprising a light-emitting element, a light-emitting element, an average light reflection factor Rv of 380 nm to 780 nm of less than or equal to 2.5%, an average blue light reflection factor RmB1 of greater than or equal to 15% in the wavelength range of 420 nm to 450 nm of greater than or equal to 15%, an average blue light reflection factor RmB3 of greater than or equal to 15% in the wavelength range of 440 nm to 460 nm of greater than or equal to 15%, and a ratio RmB1 / RmB3 of less than or equal to 1.