257results about How to "Good refractive index" patented technology

A solid state lamp includes a mounting area adapted to contain a light emitting diode (LED) chip and a suspension media which physically isolates the diode from the mounting area. The suspension media, while substantially optically transparent, includes suspended phosphor particles for down conversion and scattering of LED emissions. Additionally, the suspension media includes thermal conductivity additives to improve device thermal conductivity in higher power operations.

The present invention provides a transparent inorganic oxide dispersion which makes it possible to improve the refractive index and mechanical characteristics and to maintain transparency by modifying the surface of inorganic oxide particles with a surface modifier having one or more reactive functional groups; and an inorganic oxide particle-containing resin composition in which the transparent inorganic oxide dispersion and a resin are compositely integrated by the polymerization reaction, a composition for sealing a light emitting element, a light emitting element, and a method for producing an inorganic oxide particle-containing resin composition; and a hard coat film which has high transparency and makes it possible to improve a refractive index and tenacity, an optical functional film, an optical lens and an optical component. The transparent inorganic oxide dispersion of the present invention comprises inorganic oxide particles which have a surface modified with a surface modifier having one or more reactive functional groups and have a disperse particle diameter of 1 nm or more and 20 nm or less, and a disperse medium, wherein the surface modifier is one or more kinds selected from the group consisting of a silane coupling agent, a modified silicone, and a surfactant.

A transparent inorganic-oxide dispersion which contains inorganic oxide particles whose surface has been modified with a surface modifier having one or more reactive functional groups and, due to this, enables improvements in refractive index and mechanical properties and retention of transparency; and an inorganic-oxide-particle-containing resin composition obtained by combining and uniting this transparent inorganic-oxide dispersion with a resin through a polymerization reaction. Also provided are: a composition for encapsulating luminescent elements; a luminescent element; a process for producing the resin composition containing inorganic oxide particles; a hard coat and an optical functional film which have high transparency and can attain improvements in refractive index and toughness; an optical lens; and an optical part. The transparent inorganic-oxide dispersion is characterized by comprising a dispersion medium and inorganic oxide particles the surface of which has been modified with a surface modifier having one or more reactive functional groups and which have a dispersed-particle diameter of 1 to 20 nm. It is further characterized in that the surface modifier is one or more members selected from the group consisting of silane coupling agents, modified silicones, and surfactants.

The invention relates to an ultraviolet curing liquid optical clear adhesive and a preparation method thereof, and belongs to the field of bonding adhesives. The method comprises the steps that toluene diisocyanate, polyethylene glycol and hydroxyethyl acrylate are taken as raw materials; a urethane acrylate prepolymer is synthesized through polystep reaction by a bulk method; the prepolymer is taken as a main body; a photoinitiator, a composite reactive diluent and other assistants are added; and then the ultraviolet curing liquid optical clear adhesive is prepared. The ultraviolet curing liquid optical clear adhesive prepared by the preparation method has the characteristics that the ultraviolet curing liquid optical clear adhesive is low in smell, moderate in viscosity, good in flexibility, high in light transmittance and refractive index, high in bonding strength, waterproof, and good in cold and heat shock resistance, weather resistance and ageing resistance. The ultraviolet curing liquid optical clear adhesive is completely transparent after being cured, and can keep stable high transparency and is free from yellowing, whitening and degumming for a long term in high-temperature and high-humidity environments.

A coated article includes a temperable antireflection (AR) coating that utilizes medium and low index (index of refraction “n”) layers having compressive residual stress in the AR coating. In certain example embodiments, the coating may include the following layers from the glass substrate outwardly: silicon oxynitride (SiO_xN_y) medium index layer/high index layer/low index layer. In certain example embodiments, depending on the chemical and optical properties of the high index layer and the substrate, the medium and low index layers of the AR coating are selected to cause a net compressive residual stress and thus optimize the overall performance of the antireflection coating when the coated article is tempered and/or heat-treated.

The invention relates to a near-infrared narrow-band filter piece and an infrared imaging system. The near-infrared narrow-band filter piece comprises a substrate and an IR film system arranged at oneside of the substrate. The IR film system consists of first high-refractive-index film layers and first low-refractive-index film layers that are plated alternately; and the first low-refractive-index film layer is arranged at the outermost layer of the IR film system. The IR film system has one passband band, two transition bands, and two cutoff bands in a wavelength range of from 800 to 1200 nm; the passband band is arranged between the two cutoff bands; and the transition bands are arranged between the passband band and the cutoff bands. The passband band has a central wavelength; and thedrift amplitude of the central wavelength of the passband band is between 7 nm and 13 nm within an incident angle changing range of from 0 degree to 30 degrees. Therefore, on the premise that the hightransmittance is guaranteed, the drift of the central wavelength of the passband of the narrow-band filter piece is reduced with the angle and the imaging quality is improved.

The present invention discloses an epoxy/organosilicon co-curing composite material for LED packaging and a preparation method. The epoxy/organosilicon co-curing composite material of the present invention comprises the following components by weight: 50-500 parts of epoxy hydrogen-containing cyclosiloxane, 0-10 parts of an antioxidant, 0-10 parts of an ultraviolet absorber, 0-15 parts of a light scattering agent, 100 parts of phenyl vinyl silicone resin, 0.5-15.0 parts of an epoxy curing agent, and 0.01-1.0 part of a silicon hydrogen addition curing catalyst. The present invention combines two curing ways of epoxy cationic curing and organosilicon silicon hydrogen addition curing, through the curing reaction of epoxy and silicone to prepare the epoxy/organosilicon co-curing composite material with epoxy and organosilicon interpenetrating cross-linked network structure. The epoxy/organosilicon co-curing composite material has the characteristics of an epoxy resin and an organosilicon material, and has the performances of excellent light transmittance, adhesion, mechanical strength, heat resistance and UV resistance. The preparation process of the present invention is simple, raw materials are easily available, and practicability is high.

A material with spectrally selective reflection in the primary valences of red, green and blue is applied preferably onto laser projection screens in order to make possible the projection even in daylight. In a first embodiment, a first layer of a material that is highly reflective over the entire range of visible light, e.g., aluminum is applied onto a substrate, e.g., glass or a synthetic material, followed by a second layer of a material that is essentially non-absorbing over the entire range of visible light, e.g., SiO₂. A third layer in contact with air is applied to the second layer and is made of a material that is partially transmissive over the entire range of visible light, e.g., of NiCr An alternative embodiment comprise five layers, The first layer is made a material with a high index of refraction, e.g.; TiO₂, a second of a material with a low index of refraction, e.g., SiO₂, the third of a material with a high index of refraction, e.g., TiO₂: a fourth of a material with a low index of refraction. e.g., SiO₂, and a fifth layer of a material with a high index of refraction, e.g., TiO₂.

The invention relates to PID control based self-focusing lens ion exchange temperature control method and system. The method is characterized by adjusting a PD control parameter by using mode recognition in artificial intelligence and inference judgment in an expert system; the expert system sums up artificially adjusted experience and skills into a series of adjusting rule firstly, and then carries out analysis and judgment on controlled system information which is collected in real time, automatically selects an adjusting rule, compares a response curve of a controlled object with a control target curve and carries out repeated adjustment and comparison till a control target is met. The system mainly comprises a thermocouple (1), an adjustment amplifying circuit (2), data collecting cards (3 and 7), a computer (4), a photoelectric isolating circuit (5), and a thyristor power adjusting and temperature controlling circuit (6), wherein the thermocouple (1) is installed in a heat treatment furnace, and the computer (4) is provided with PID control software. The invention has high temperature control precision, can reduce the requirement on the automation level of equipment and is beneficial to reducing the production cost.

The invention discloses a curved screen and flat panel display module full-lamination method, which comprises the following steps: designing and manufacturing a frame, fixing a frame-pasting curved screen and the frame through a positioning fixture, injecting liquid optical cement, putting a flat panel liquid crystal display module, fixing through the positioning fixture to form an integrated screen, putting the positioning fixture and the integrated screen into a heating device and carrying out heating curing, removing the positioning fixture and the integrated screen out of the heating device after completing the above steps, dismounting the positioning fixture, removing spilled cement residue at the edge of the frame and completing lamination. The invention also discloses a curved screen and flat panel display module full-laminated integrated screen prepared according to the above processing method. By arranging the frame between the curved screen and the flat panel liquid crystal display module, lamination of a curved-surface product is converted into traditional flat-panel type lamination. The operation steps are simple. Investment in equipment and fixture is less. Batch production is convenient to realize.

The invention relates to a solar heat- reflective insulating varnish, belonging to coating technology field. When it is coated on the surface of glass, it can insulate heat and maintain glass transparency. The invention aslo provides the preparation method. The comprised raw material and proportion by weight are as follows: film forming matter 35-45, inorganic oxidant 10- 15, levelling agent 0.5- 1, defoaming agent 0.3- 0.5, silane coupling agent 1- 5, and mixing solvent 33.5- 53.2. The varnish is characterized by heat resistance, water resistance, acid and alkali resistance, high reflecting solar heat, good light transmission rate, low cost, energy- saving, and suitability to be used for building galss, car glass, solar house heating, incandescent lamp lighting and refrigerator glass. The preparation process and device is easy and simple and is suitable for industrial production.

The invention discloses a preparation process for a high-temperature-resistant high-thermal-conductivity insulating paint, belonging to the technical field of paints. The paint comprises the following raw materials by mass: 12 to 23% of epoxy modified organosilicone resin, 33 to 48% of a solvent, 0.7 to 0.9% of a silane coupling agent, 36 to 42% of a filling material, 0.1 to 0.3% of a curing agent, 0.03 to 0.08% of ceramic powder and 0.02 to 0.07% of nanometer diamond. The paint prepared in the invention can be used for a long time at a high temperature and has good stability, insulating properties, wear resistance and good corrosion resistance; and the preparation process is simple and has good operability.

The invention relates to a heat-conducting hot melt adhesive, which comprises the following components by weight percent: 1%-20% of silicon dioxide, 1%-10% of titanium dioxide, 1%-20% of zirconium silicate, 1%-10% of boron nitride, 1%-10% of aluminum oxide, 1%-10% of silicon carbide. 0.5%-5% of dispersant, 0.5%-5% of anti-sedimentation agent, 0.5%-5% of defoamer and the balance of synthetic resin. According to the invention, elements having excellent refractive index, high axial heat source absorption capability and fine thermal conductivity such as aluminum, boron, titanium, silicon and zirconium are processed into oxides, nitrides and carbides, and the oxides, the nitrides and the carbides are ground into powdery particles within the range from 10 nm to 25 microns; next, the powdery particles are mixed with hot melt adhesive resin in a certain ratio to obtain the hot melt adhesive; and the obtained hot melt adhesive has efficiency heat conductivity and is capable of quickly transferring heat in three ways of conduction, convection and radiation.

The present invention relates to a silicone resin. The silicone resin of the present invention can be used to advantage in applications involving the encapsulation of semiconductor elements, such as the light-emitting elements of light-emitting diodes.

The invention provides a bonding edge-cladding method for laser glass, comprising the following steps of: finely selecting edge-cladding glass matched with the physical property of matrix laser glass, clearly cleaning an edge-cladding surface by the fine machining of the edge-cladding surface, directly gluing the matrix laser glass and the edge-cladding glass, putting into pre-prepared dies, bonding an edge-cladding interface by a specific heat treatment process without any organic and inorganic adhesives, and firmly combining the edge-cladding glass and the matrix glass, wherein the bonding and edge-cladding connection strength is approximate to the strength of the N31 neodymium glass per se. The method provided by the invention has the characteristics that the refractive index match is good, the bonding strength is high, the weather fastness is high, and the residual reflection of the edge-cladding interface is less than 4/10000, so that the requirement that the parasitic oscillation is eliminated by cladding edge can be completely met.

An LED (Light-Emitting Diode) packaging silica gel with high refractive index, light transmittance and power is composed of two adhesives A and B according to parts by weight, wherein the adhesive A comprises the following components: phenyl vinyl polysiloxane, phenyl silicone, a quick-drying agent, a light stabilizer and an antioxidant; and the adhesive B comprises the following components: phenyl vinyl polysiloxane, phenyl hydrogen polysiloxane, a retarder, a defoamer and an ultraviolet absorber. The LED packaging silica gel employs a two-component packaging manner; the production process of the LED packaging silica gel is simple and easy to implement; the storage of the LED packaging silica gel is convenient without special requirement for the environment; and the period of storage is long, and production is facilitated. In use, the silica gel formed through simple blending is good in bonding strength, high in strength, high in light transmittance and refractive index, and has the advantages of being excellent in high-temperature resistance, good in aging and weather resistance and the like.

In the liquid immersion lithography process, by simultaneously preventing deterioration of a resist film and deterioration of an immersion liquid employed during liquid immersion lithography which uses various immersion liquids, including water, resistance to post exposure delay of the resist film can be improved without increasing the number of processes, thereby making it possible to form a high resolution resist pattern using liquid immersion lithography. Furthermore, it is possible to apply a high refractive index liquid immersion medium, used in combination with the high refractive index liquid immersion medium, thus making it possible to further improve pattern accuracy. Using a composition comprising an acrylic resin component having characteristics which have substantially no compatibility with a liquid in which a resist film is immersed, particularly water, and are also soluble in alkaline, a protective film is formed on the surface of a resist film used.

The present invention provides a glass fiber composition, a glass fiber and a composite material therefrom. The glass fiber composition comprises the following components expressed as percentage by weight: 58-64% SiO2, 14-19% Al203, ≧8.8% and <11.8% CaO, 7.5-11% MgO, 0.2-2.7% SrO, 0.1-2% Na2O+K2O, 0.05-0.9% Li2O, 0.05-1% Fe2O3, 0.05-1.1% TiO2 and <0.5% F2, wherein the range of the weight percentage ratio C1=(MgO+SrO)/CaO is 0.75-1.1, and the range of the weight percentage ratio C2=CaO/MgO is less than 1.4. Said composition can effectively inhibit the crystallization tendency of glass, significantly decrease the liquidus temperature and crystallization degree of glass and also has an outstanding glass refractive index and outstanding modulus.

A gradient refractive-index (GRIN) plastic rod comprises a monomer, a surfactant monomer (surfmer), and nanoparticles. The surfmer, which keeps nanoparticles and polymers in a good mutual solubility, can increase a content of nanoparticles, and thus overcome a problem of the resulting opaque plastic rod caused by introducing nanoparticles in the prior art. Moreover, nanoparticles can increase a difference of refractive index, the numerical aperture and a transmission efficiency of the GRIN plastic rod.

A waveguide structure according to the invention comprises a core layer (10), having a refractive index n_core, and an array of rods (11) in the core layer having a refractive index n_rods. The refractive indices satisfy the inequality: n_rods>n_core. In a planar waveguide structure buffer (12) and cladding (13) layers are included, having a refractive index n_buffer and n_cladding respectively. The refractive indices then satisfy the inequality: n_rods>n_core>n_cladding and n_buffer. This condition provides greater vertical confinement of the E-field of an optical signal passing through the waveguide. Furthermore, it allows waveguides to be formed of a glassy material having a similar refractive index and core dimensions to that of a fiber. A high refractive index contrast within the photonic crystal region is used while totally eliminating the need for mode conversion to launch light in and out of the waveguide.

A serum-free cartilage cell culture solution is obtained by adding exogenous additives to a basic culture solution. The basic culture solution is a DMEM culture solution or an F12 culture solution or a DMEM culture solution-F12 culture solution mixed culture solution, and the exogenous additives are nonessential amino acids, glucan, vitamin C, glutamine, sodium pyruvate, insulin or insulin-like growth factor, transferrin, growth hormone, triiodothyronine, hydrocortisone, dexamethasone, sodium selenite, beta-mercaptoethanol, lipid concentrate, progesterone, succinimide, a basic fibroblast growth factor, an epidermal growth factor, a transforming growth factor, a bone morphogenetic protein and a platelet derived growth factor respectively. The serum-free cartilage cell solution can avoid potential risks due to the use of serum, improves the extracellular matrix secreting ability of cartilage cells, makes the growth propagation state approach the growth propagation state of the cells in a serum-containing culture solution, and allows the dedifferentiation rate and the matrix secreting ability of low density inoculation cartilage cells to be obviously better than those of the cells in the serum-containing culture solution respectively.