23results about How to "Good refractive index" patented technology

The invention relates to the technical field of optical glass manufacturing, in particular to high-refractive-index glass as well as a preparation method and application thereof. The transition metal is less than 4 ppm by mass, and the transition metal comprises one or more of Fe, Cr, Ni, Cu, Mn, Co and V; the oxide is prepared from the following components in mole percent based on the oxide: 17 mol% to 49 mol% of Bi2O3, 2.7 mol% to 15.7 mol% of Nb2O5, 8.5 mol% to 39 mol% of TeO2, 2 mol% to 19.5 mol% of P2O5, 11.3 mol% to 41 mol% of B2O3, 0 mol% to 1 mol% of TiO2, 0 mol% to 1 mol% of Ta2O5, 0 mol% to 1 mol% of WO3 and 0.5 mol% to 16.5 mol% of ZnO, and Bi2O3 / (TeO2 + TiO2 + WO3 + Nb2O5 + Bi2O3) * 100 is more than or equal to 30 and less than or equal to 75. Tests show that when the thickness of the glass is 10 mm, the refractive index of the glass is 2.09-2.35, and the transmittance of the glass with the wavelength lambda 70 smaller than 450 nm is 82.4%-96.8%. The problems that in the prior art, high-refractive-index glass is low in refractive index and light transmittance and low in performance and cost ratio, and the increasingly-developed visual experience and development requirements of head-mounted displays cannot be met are solved.

The invention discloses a high-mechanical-property orthokeratology lens material copolymer and a preparation method thereof, and relates to the technical field of high polymer materials. The used raw materials comprise a fluorosilicone material, a hydrophilic monomer, an initiator and a cross-linking agent; the method comprises the following steps: mixing a monomer and an initiator according to a preset ratio, degassing, and carrying out two-stage heating polymerization reaction in a mold. After the polymerization reaction is finished, the copolymer in the mold is taken out, and the required orthokeratology lens material copolymer with the high mechanical property can be obtained through cleaning and drying treatment. The process is simple in reaction step and short in reaction time, the reaction rate can be controlled, and the production cost of the orthokeratology lens is reduced. The copolymer has high oxygen permeability and excellent optical performance, and meanwhile, compared with common like products, the copolymer shows good mechanical performance. The composition is especially suitable for preparing myopia lenses, orthokeratology lenses (OK lenses) or rigid breathable contact lenses (RGP lenses), can provide excellent visual effects and wearing comfort, and reduces irritation to eyes.

The present application provides a compound used as a coating agent for providing a particle having excellent dispersibility and refractive index, a particle having a surface coated with the compound, a production method thereof, and a dispersion composition containing the particle. The compound according to the present application has a structure represented by Formula (1). In the formula, R 1 represents an organic group having 1 to 30 carbon atoms, R 2 represents OR 3 or a group represented by Formula (2), R 3 represents an organic group having 1 to 30 carbon atoms, n1 and n2 represent an integer of 0 or more, n1 + 2 x n2 represents a valence number determined by the kind of L, L represents aluminum, gallium, yttrium, titanium, zirconium, hafnium, bismuth, tin, vanadium, or tantalum, * represents a bonding site, and R 4 and R 5 represent an organic group having 1 to 30 carbon atoms which can have an oxygen atom. The particle according to the present application has a structure represented by Formula (1) on the surface.

The invention provides a triarylamine derivative and an organic electroluminescent device thereof, and particularly relates to the technical field of organic electroluminescence. The triarylamine derivative provided by the invention has proper HOMO energy level and good hole mobility, is applied to an organic electroluminescent device as a hole transport layer material, has high energy level matching degree with an adjacent functional layer, effectively reduces the energy barrier needing to be overcome in the hole transport process, is beneficial to hole injection and transport, and improves the hole transport efficiency. According to the present invention, the organic light-emitting material has characteristics of high refractive index, high glass-transition temperature, good film-forming property and high thermal stability, such that the light-emitting efficiency of the device is substantially improved, and the service life is substantially prolonged when the organic light-emitting material is adopted as the covering layer material, such that the organic light-emitting material has characteristics of good refractive index, high glass-transition temperature, good film-forming property and high thermal stability.

A kind of coating method based on waveband adaptive wide spectrum film layer thickness monitoring, to improve the coating quality and efficiency of optical thin film, by layer by layer design optical thin film structure, and using film system design software to calculate transmittance spectrum, to evaluate the influence of thickness change on optical performance;In the coating process, waveband adaptive monitoring technology is used, according to the characteristics of each layer of film and the performance of coating machine, to adaptively select high sensitivity monitoring wavelength, to realize accurate monitoring of film layer thickness in wide spectral range.The present application calculates the influence of current film thickness deviation on current film transmittance for layer by layer design of optical thin film, obtains the sensitivity of transmittance spectrum to film thickness deviation layer by layer, sets the sensitivity threshold, selects high sensitivity wavelength as monitoring wavelength, to improve the signal-to-noise ratio of suppression monitoring, to improve the deposition accuracy of film layer thickness.

The invention provides a triarylamine derivative and an organic electroluminescent device thereof, and particularly relates to the technical field of organic electroluminescence. The triarylamine derivative provided by the invention has proper HOMO energy level, good hole mobility and relatively strong electron donating ability, is beneficial to hole injection and transmission, increase of carrier transmission balance and improvement of effective compounding of excitons in a luminescent layer, and meanwhile, the triarylamine derivative also has good refractive index and high glass transition temperature, and can be used for preparing a light-emitting device. The organic electroluminescent material has the advantages of good film-forming property and excellent light extraction efficiency, reduces the accumulation of Joule heat in the device, is applied to the organic electroluminescent device as a hole transport layer material or a covering layer material, obviously improves the luminous efficiency of the device, and prolongs the service life of the device. The triarylamine derivative and the organic electroluminescent device thereof have good application effect and industrialization prospect.

The invention relates to a modified polyurethane optical material and a preparation method thereof, and the optical material is prepared by polymerizing the following components: 25-40 parts by weight of an isocyanate compound; 15 to 30 parts by weight of a multi-mercapto thiol compound; 10 to 20 parts by weight of a cyclic sulfide monomer; 5-10 parts by weight of an acrylate monomer; 0.1 to 0.5 part by weight of a catalyst; the multi-sulfydryl thiol compound is a trisulfydryl thiol compound with a structure as shown in a formula (a). The hybrid modified polyurethane material is prepared by carrying out multi-component cross-linking curing polymerization on a multi-mercapto thiol compound, isocyanate, cyclic sulfide and acrylate. The material has the advantage of high impact resistance while maintaining the high refractive index optical performance of 1.64, is suitable for manufacturing optical components with high refractive index requirements, such as prisms, lenses, lenses and the like, and provides a wider material selection range for the application of high-end optical components. # imgabs0 #

The present invention addresses the problem of providing: an ink for forming a coating film for an optical member, said ink being capable of forming a coating film for an optical member, said coating film having excellent light-blocking properties, inner surface reflection suppression properties, refractive index, and film quality; and an application thereof. Provided are: an ink for forming a coating film for an optical member, which contains a binder and a volatile component, at least one of a black pigment, a colored pigment and a colorless pigment, and which, when used as a coating film for an optical member, does not contain an organic solvent; the average refractive index (n) of the coating film for optical members in the wavelength range of 400-700 nm is 1.70 or more, the average extinction coefficient (k) of the coating film for optical members in the wavelength range of 400-700 nm is 0.10-0.15, and the ratio of the total of the black pigment, the colored pigment, and the colorless pigment to the total volume of the coating film for optical members is 10-40 vol%.

The invention discloses optical glass, a prefabricated member thereof, an optical element and an optical instrument, and relates to the technical field of optical glass. The optical glass comprises the following components in percentage by weight: 5-25% of SiO2 and B2O3; 45 to 70 percent of La2O3, Y2O3 and Gd2O3; zrO2: 2%-15%; 1 to 15% of Nb2O5; 5%-20% of TiO2; 0 to 5 percent of Ta2O5; 0 to 10% of RO; 0 to 8% of Rn2O; 0 to 5 percent of WO3; znO: 0 to 10%; 0 to 8 percent of Al2O3; 0 to 10 percent of Yb2O3; 0 to 5 percent of GeO2; 0-2% of a clarifying agent; wherein the ratio of the Nb2O5 to the Y2O3 is 0.1 to 2.0; rO is one or more of MgO, CaO, SrO and BaO; the Rn2O is one or more of Li2O, Na2O and K2O; and the clarifying agent is one or more of Sb2O3, SnO, SnO2 and CeO2. The optical glass provided by the invention has higher Young modulus and hardness while having expected refractive index and Abbe number.

The present invention provides a holographic polymer dispersed liquid crystal material, a volume holographic optical waveguide device and a preparation method thereof. By adjusting the composition ratio of the holographic polymer dispersed liquid crystal material and the process parameters in the preparation process of the holographic optical waveguide device, a holographic optical waveguide device with high diffraction efficiency and low haze is prepared. Specifically, three types of monomers with different functionalities are introduced into the holographic polymer dispersed liquid crystal material: the first monomer is selected from lauric acid acrylate, cyclotrimethylolpropane formal acrylate, and methacrylate oxetane ester; the second monomer is selected from polypropylene glycol (700) diacrylate, dioxane diol diacrylate, and polyethylene glycol (600) diacrylate; the third monomer is selected from ethoxylated trimethylolpropane triacrylate, ethoxylated pentaerythritol tetraacrylate, and dipentaerythritol hexaacrylate; so that the prepared volume holographic optical waveguide device has better comprehensive performance.

The invention discloses a monomeric compound, a polymer and an optical lens, and relates to the technical field of optical materials, the structural formula of the monomeric compound is as shown in formula (I), in the formula, A is hydrogen or methyl; r1 comprises at least one of hydrogen, fluorine, chlorine, bromine, iodine, a cyano group, a nitro group, a phenyl group, a C1-C6 alkyl group, a C1-C6 alkoxy group, a C1-C6 alkyl substituted phenyl group and a C1-C6 alkoxy substituted phenyl group; n = 1, 2, 3, 4 or 5; b comprises a C1-C6 alkyl group, a C1-C6 alkoxy group or does not exist; d comprises a conjugated cyclic group or a substituted conjugated cyclic group. The novel monomeric compound provided by the invention can be used for preparing a polymer with high refractive index, and the polymer has good light transmission and mechanical properties at the same time.

The invention provides a carbazole compound and an organic electroluminescent device thereof, and particularly relates to the technical field of organic photoelectric materials. The compound provided by the invention has good thermal stability and refractive index, can reduce the loss of light reflected by a nearby electrode during luminescence when being used as a covering layer material, and effectively improves the stability of a film layer, thereby improving the luminous efficiency of a device and prolonging the service life of the device. The preparation method of the compound is simple, raw materials are easy to obtain, and the compound can be widely applied to the fields of organic thin film transistors, panel display and the like and has good application effects and industrialization prospects.

The invention provides a triarylamine derivative and an organic electroluminescent device thereof, and particularly relates to the technical field of organic electroluminescence. The triarylamine derivative provided by the invention has proper HOMO energy level, good hole mobility, relatively strong electron donating ability, high glass transition temperature, good film-forming property and excellent light extraction efficiency, and can be used as a hole transport layer or a covering layer material to be applied to an organic electroluminescent device, so that hole injection and transmission can be improved, and the light extraction efficiency is improved. The composite probability of excitons in the light-emitting layer is increased, the coupling efficiency of light in the device is improved, generation of Joule heat is reduced, and therefore the light-emitting efficiency of the device is greatly improved, and the service life of the device is greatly prolonged. The triarylamine derivative and the organic electroluminescent device thereof have good application effect and industrialization prospect.

The present application provides a compound for a cover layer represented by the following Chemical Formula 1 and an organic light emitting element comprising the same: <Chemical Formula 1>

The present invention relates to a compound for a covering layer and an organic light-emitting device comprising the same. The compound for a covering layer in one embodiment of the present invention is suitable for an organic light-emitting device and can improve the external luminous efficiency, color coordinates and life of the organic light-emitting device.

The invention provides a heterocyclic compound and an organic electroluminescent device thereof, and particularly relates to the technical field of organic photoelectric materials. When the compound is used as a light-emitting layer main body material in the organic light-emitting device, the mobility of electrons and holes can be improved, the recombination efficiency of the electrons and the holes can be improved, and meanwhile, the energy loss can be limited, so that the photoelectric property of the organic light-emitting device is improved. The compound provided by the invention has good thermal stability and refractive index when being used as a covering layer material, can reduce the loss of light reflected by a nearby electrode during luminescence, effectively improves the stability of a film layer, and improves the performance of a device. The preparation method of the compound is simple, raw materials are easy to obtain, and the compound can be widely applied to the fields of organic thin film transistors, panel display and the like and has good application effects and industrialization prospects.

The invention discloses a reflective wavelength conversion device and a preparation method thereof.The reflective wavelength conversion device comprises a fluorescent layer and a heat conduction reflecting layer arranged below the fluorescent layer, the fluorescent layer is obtained by sintering fluorescent powder, glass powder and scattering particles, the fluorescent layer comprises n fluorescent powder layers, the first fluorescent powder layer is close to the heat-conducting reflecting layer, the outermost layer far away from the heat-conducting reflecting layer is the nth fluorescent powder layer, n is larger than or equal to 2 and smaller than or equal to 5, the content of fluorescent powder in the first fluorescent powder layer to the nth fluorescent powder layer increases layer by layer, and the content of scattering particles decreases layer by layer. The heat conduction reflection layer comprises a porous aluminum oxide layer, an aluminum oxide-aluminum nitride transition layer and an aluminum nitride layer which are sequentially stacked, and the porous aluminum oxide layer is arranged close to the fluorescent layer. The wavelength conversion device is high in wavelength conversion efficiency, high in limit blue light resistant power, good in heat dissipation effect and good in reliability.

The invention discloses a high-performance water-based fluorocarbon coating and a preparation method thereof. According to the baking varnish, the modified fluorocarbon resin, the methylated melamine formaldehyde resin and the blocked isocyanate are subjected to cross-linking curing, and the adhesion promoter and other auxiliaries are added, so that the high-performance water-based fluorocarbon coating with excellent adhesion, high weather resistance, high hardness, wear resistance, boiling water boiling resistance and stain resistance is obtained. The invention further provides a preparation method of the high-performance water-based fluorocarbon coating.

The invention relates to the technical field of solar cells, in particular to a silicon heterojunction cell composite gradient passivation film and a preparation method thereof.The preparation method comprises the following steps that when an intrinsic amorphous silicon layer is prepared, only silane is introduced, then hydrogen is introduced while the flow of the silane is kept unchanged, and the intrinsic amorphous silicon layer is prepared by taking 2-4 seconds as one stage; the hydrogen / silane gas volume ratio in each stage is 1.25-2 times of the hydrogen / silane gas volume ratio in the previous stage, and the total time of introducing the hydrogen to prepare the intrinsic amorphous silicon layer is 60-120 seconds. Due to the introduction of the composite film layer with the hydrogen / silane ratio continuously changed, parameters such as the overall band gap, the refractive index and the extinction coefficient of the passive film layer are obviously improved, and more photons can reach PN junctions. The photoelectric conversion efficiency of the cell is obviously improved, and the stability is obviously improved.

The present invention relates to the field of satellite timing technology, and discloses a signal path positioning method of a Beidou timing chip under adaptive conditions, including: performing regional segmentation on an aerial area, generating a boundary curve of the regional boundary of the segmented area; constructing a virtual satellite position of a Beidou satellite, transmitting a Beidou timing signal from the Beidou satellite to a Beidou timing chip to generate a virtual transmission line of the Beidou timing signal, identifying the intersection coordinates between the virtual transmission line and the boundary curve, and calculating the virtual incident angle of the virtual transmission line on the intersection coordinates; calculating the regional refractive index of the aerial area, constructing a virtual signal path of the Beidou timing signal between the Beidou satellite and the Beidou timing chip, constructing a virtual position relationship between the virtual satellite position and the virtual chip position of the Beidou timing chip; analyzing the real satellite position of the Beidou satellite, and analyzing the adaptive chip position of the Beidou timing chip. The present invention can locate the signal path of satellite transmission when the satellite position and the ground terminal position are unknown.

The present invention provides a compound for a covering layer represented by the following chemical formula 1 and an organic light-emitting element including the compound for a covering layer.

The invention belongs to the technical field of organic synthesis and high polymer materials, and particularly relates to a dicarboxylic anhydride photosensitive monomer as well as a preparation method and application thereof. The structural formula of the dicarboxylic anhydride photosensitive monomer is shown as a formula I: # imgabs0 #, n is an integer ranging from 1 to 5, and R1 and R2 are respectively and independently selected from hydrogen, fluorine, nitryl, monofluoromethyl, difluoromethyl, trifluoromethyl or trifluoromethoxy. According to the invention, the variety of binary anhydride is expanded, the polyimide polymer can be obtained through polymerization, and the light transmittance, the refractive index, the haze, the impedance performance and other functions of the polyimide polymer are improved; the obtained polyimide polymer shows excellent performances in the aspects of light transmittance, refractive index, haze, impedance and the like, and can improve the photoelectric conversion efficiency and reduce the transmission loss.

The invention provides an arylamine compound and an organic electroluminescent device thereof, and particularly relates to the technical field of organic photoelectric materials. The compound provided by the invention has good thermal stability, has good refractive index when being used as a covering layer material, and can significantly improve the light extraction efficiency of a device, improve the luminous efficiency of the device and prolong the service life of the device. The preparation method of the compound is simple, raw materials are easy to obtain, and the compound can be widely applied to the fields of organic thin film transistors, panel display and the like and has good application effects and industrialization prospects.