253results about How to "Increase refraction" patented technology

Improved devices, systems, and methods for diagnosing, planning treatments of, and / or treating the refractive structures of an eye of a patient incorporate results of prior refractive corrections into a planned refractive treatment of a particular patient by driving an effective treatment vector function based on data from the prior eye treatments. The exemplary effective treatment vector employs an influence matrix which may allow improved refractive corrections to be generated so as to increase the overall accuracy of laser eye surgery (including LASIK, PRK, and the like), customized intraocular lenses (IOLs), refractive femtosecond treatments, and the like.

An optical lens system with a wide field of view comprises, in order from the object side to the image side: a first lens element with negative refractive power having a convex object-side surface and a concave image-side surface; a second lens element; a third lens element; a fourth lens element having a concave object-side surface and a convex image-side surface; a fifth lens element with positive refractive power; a sixth lens element with negative refractive power; a seventh lens element, one of an object-side surface and an image-side surface being aspheric. There are seven lens elements with refractive power. By adjusting the arrangement of curvature, refractive power of the respective lens elements and a stop, sufficient field of view can be obtained and the aberrations of the system can be corrected in order to obtain good image quality.

Provided are an optical glass having high-refractivity, low-dispersion and anomalous partial dispersion properties, having excellent processability, being excellent as an anomalous partial dispersion glass for suppressing chromatic aberration, containing P5+, Al3+ and alkaline earth metal ions selected from the group consisting of Mg2+, Ca2+, Sr2+ and Ba2+ as essential cationic components and F- and O2- as essential anionic components, wherein the ratio of content of Ba2+ to the total content R2+ of Mg2+, Ca2+, Sr2+ and Ba2+, Ba2+ / R2+, is 0.01 or more but less than 0.5 on the basis of cationic %, and having an Abbe's number (nud) of 68 or more, optical glass having an Abbe's number (nud) of 68 or more, a partial dispersion ratio of 0.535 or more and a frictional abrasion of 500 or less and an optical glass which is to be polished in a polishing step for producing an optical element and which is a fluorophosphate glass having a frictional abrasion of 500 or less.

Improved devices, systems, and methods for planning cataract surgery on an eye of a patient incorporate results of prior corrective surgeries into a planned cataract surgery of a particular patient by driving an effective surgery vector function based on data from the prior corrective surgeries. The exemplary effective surgery vector employs an influence matrix which may allow improved refractive corrections to be generated so as to increase the overall efficacy of a cataract surgery by specifying one or more parameters of an intraocular lens (IOL) to be implanted during the cataract surgery.

The planar lens of the invention having a flat glass substrate, in which a refractive index distribution is formed by diffusing a refractive index-increasing component into the flat glass substrate in a substantially hemispherical form or semicylinder form, wherein the refractive index-increasing component is silver, and the flat glass substrate comprises Li as an alkali metal that is subject to an ion exchange with the silver.

An optical lens system with a wide field of view comprises, in order from the object side to the image side: a first lens element with negative refractive power having a convex object-side surface and a concave image-side surface; a second lens element; a third lens element; a fourth lens element having a concave object-side surface and a convex image-side surface; a fifth lens element with positive refractive power; a sixth lens element with negative refractive power; a seventh lens element, one of an object-side surface and an image-side surface being aspheric. There are seven lens elements with refractive power. By adjusting the arrangement of curvature, refractive power of the respective lens elements and a stop, sufficient field of view can be obtained and the aberrations of the system can be corrected in order to obtain good image quality.

An optical glass, having a refractive index nd which is greater than 1.59, an abbe number υd which is greater than 67, a low photoelastic coefficient and good chemical stability and grinding performance. The fluorophosphate optical glass contains, by cation percentage contents: P5+: 30％-40％, Al3+: 12％-20％, Ba2+: 30％-40％, Ca2+: 1.3％-12％, Sr2+: 1％-10％, La3+: 0％-5％, Gd3+: 0％-6％, Y3+: 0％-10％ and contains, by anion percentage contents: F+: 25%-40％, O2-: 60%-75％. The optical glass is applicable to manufacturing methods such as precision moulding, secondary hot-press forming and cold processing, and to manufacturing optical elements such as a high-performance spherical, aspheric and planar lens and a prism and an optical grating.

A method for preparing a surface of a substrate such as a polymer, glass, and the like to receive one or more images applied thereto. The method may include selecting a substrate having a surface, abrading a portion of the surface, and printing an image comprising a graphic, text, or some combination thereof on the abraded surface. The substrate may be masked to protect selected areas from abrasion. Additionally, if necessary, the substrate may be cleaned after the abrasion to improve the adherence of the image to the abraded surface.

The invention relates to an anti-ultraviolet wear-resistant helmet lens provided with gradually changed colors and used for the vehicle. Plastics is adopted as the raw material, and produced into the lens through injection molding. The helmet lens is characterized in that anti-ultraviolet (UV) agent with the weight ratio of 0.3-0.5 percent is added into the plastic raw material, and the plastics is produced into the transparent lens through uniform mixing and injection molding; the lens is washed through water and dried, water-soluble dye powder is adopted to be dissolved in water according to the water-dye powder proportion of 100: 0.01-1.0, stirred uniformly and heated to 80 to 100 DEG C, the lens is fixed on a rack or held in the hand, immerged into dyeing solution and moved vertically, gradient dying and overlapping are then performed for one to two minutes, and the lens is respectively cleaned through cleaning agent and water, and then the lens with gradually changed colors can be obtained. The anti-ultraviolet wear-resistant helmet lens has the advantages of anti-ultraviolet function, through which the radiant heat of harmful ultraviolet and infrared rays emitted from the sun can be prevented and certain skin protection function can be achieved; the effect of gradually changed colors, which can protect the eyes from fatigue, and can provide the product with colorful and beautiful appearance.

The invention provides composite ceramic powder which is used for photo curing. The composite ceramic powder comprises a ceramic powder body and a wrapping lawyer wrapping the ceramic powder body, andthe color of the wrapping layer is lighter than that of the ceramic powder body. The invention further provides a ceramic forming method. The method comprises the steps that the composite ceramic powder which is used for photo curing is provided; ceramic slurry with the composite ceramic powder is prepared; a three-dimensional solid model of parts to be printed is established, the thickness of aprinting layer is determined, and the three-dimensional solid model is layered according to the layer thickness; the ceramic slurry is subjected to photo curing three-dimensional printing, and part bodies are prepared.

Provided are methods and compositions for controlling postnatal ocular growth and the development of ocular errors in the maturing eye of a subject, comprising altering the refraction and / or growth of the maturing eye of a subject by administering to the eye a therapeutically effective amount of at least one GABA drug or compound, including agonists or antagonists (alone or in combination with other compounds), as well as any other drug or composition, regardless of classification, that acts to alter the refractive development and / or growth of the eye. Further provided are methods and compositions for treating or preventing myopia, hyperopia or amblyopia.

The invention discloses a thermal shock resistant high-refraction LED packaging glue composition and a preparation method thereof; the LED packaging glue composition is prepared from component A and component B at a weight ratio of 1:1; the component A is prepared from, by weight, 25-35 parts of methyl phenyl vinyl silicone resin, 10-20 parts of methyl phenyl vinyl silicone oil, 0.1-0.3 part of a catalyst, and 0.01-0.03 part of a heat resistant; the component B is prepared from, by weight, 5-15 parts of methyl phenyl vinyl silicone resin, 30-45 parts of methyl phenyl hydrogen-containing silicone resin, 0.02-0.1 part of an inhibitor, and 0.5-3 parts of an adhesion promoter. The invention belongs to the technical field of LED packaging and provides the LED packaging glue composition, having the excellent properties, such as adhesion, thermal shock resistance, permeability, refractivity and hardness, and capable of meeting the requirements of high-power LED packaging.

The invention discloses a plasma-type tungsten oxide-modified graphite phase carbon nitride nanosheet composite photocatalyst and a preparation method and application thereof. The composite photocatalyst comprises a plasma-type tungsten oxide and a graphite phase carbon nitride nanosheet. The plasma-type tungsten oxide attaches to the surface of the graphite phase carbon nitride nanosheet. The plasma-type tungsten oxide is W18O49. The preparation method comprises mixing the graphite phase carbon nitride nanosheet and a tungsten hexacarbonyl solution to obtain a precursor mixed solution and preparing a composite photocatalyst through a hydrothermal reaction. The composite photocatalyst has the advantages of high photocatalytic activity, wide photoresponse range, stable photocatalytic performance and good recyclability. The preparation method has the advantages of simple processes, operation easiness and low cost. The composite photocatalyst can be used for treating antibiotic waste water, can be used through a simple method, realizes a low cost, has a high removal rate, effectively degrades antibiotics in waste water and has a good application prospect.

The invention relates to an epitaxial growth method for a GaN-based LED (Light Emitting Diode) epitaxial active area basic structure, and aims at improving the current conditions of poor quality and low luminous efficacy of ordinary epitaxial growth crystals. The method comprises the following steps that: (1) a layer of SiO2 is deposited on a substrate covered with a GaN layer in a PECVD (Plasma Enhanced Chemical Vapor Deposition) way, then, a layer of Ni thin film is formed on the SiO2 through vapor deposition, and an Ni nano island is prepared through rapid thermal annealing; (2) the Ni nano island is used as a mask for etching the SiO2 and the GaN layer, the Ni thin film is removed after the etching completion, and GaN nano pillars with SiO2 pattern masks on the tops are obtained; and (3) the GaN transversely and epitaxially grows on the GaN nano pillars with the SiO2 pattern masks on the tops, and the GaN grows in the lateral direction on the side wall of each nano pillar to form a cavity; and crystal lattices of the SiO2 and the GaN are unmatched, so the GaN can transversely grow through crossing the SiO2 pattern masks, the SiO2 is finally covered, the GaN further grows 1 to 2[mu]m after the completion of the transverse epitaxial growth, and the active area basic structure is obtained. The epitaxial growth method provided by the invention has the advantages that the internal and external quantum effects can be simultaneously improved, so that the light efficiency of a GaN-based LED can be improved.

An image sensing device for receiving an incident light having an incident angle and photo signals formed thereby is provided. The image sensing device includes a micro prism and a micro lens for adjusting the incident angle and converging the incident light, respectively, a photo sensor for converting the photo signals into electronic signals, and an IC stacking layer for processing the electronic signals.

A method for preparing diffusion film includes mixing multiple ball form scattering particle and multiple non-ball form scattering particle in solution with binder for forming a mixed liquid and then coating mixed liquid on a transparent base plate.

Improved devices, systems, and methods for planning cataract surgery on an eye of a patient incorporate results of prior corrective surgeries into a planned cataract surgery of a particular patient by driving an effective surgery vector function based on data from the prior corrective surgeries. The exemplary effective surgery vector employs an influence matrix which may allow improved refractive corrections to be generated so as to increase the overall efficacy of a cataract surgery by specifying one or more parameters of an intraocular lens (IOL) to be implanted during the cataract surgery.

Improved devices, systems, and methods for planning cataract surgery on an eye of a patient incorporate results of prior corrective surgeries into a planned cataract surgery of a particular patient by driving an effective surgery vector function based on data from the prior corrective surgeries. The exemplary effective surgery vector employs an influence matrix which may allow improved refractive corrections to be generated so as to increase the overall efficacy of a cataract surgery by specifying one or more parameters of an intraocular lens (IOL) to be implanted during the cataract surgery.

The invention relates to a combined high-precision hot stamping plate and a three-channel hot stamping refraction anti-counterfeiting mark, which aims to solve the technical problem of poor anti-counterfeiting effect of the traditional nesting overprinting, including a set of combined high-precision The laser engraving plate and two hot stamping films with different effects and colors, through the combination of the combined hot stamping plate and the hot stamping plate, combined with the structural design characteristics of the hot stamping mold and the hot stamping mold, realize the hot stamping plate and the hot stamping plate The three-channel refraction anti-counterfeiting logo is successively folded and ironed, so that different patterns, characters or lines can be observed from different viewing angles, which solves the technical problem that the folded ironing cannot form refraction anti-counterfeiting at various angles of view in the prior art.

The invention relates to a polyterafluoroethylene fireproof self-cleaning wall cloth film which comprises a glass fiber cloth layer. Base layers and polyterafluoroethylene layers are respectively arranged on the upper surface and the lower surface of the glass fiber cloth layer from the inside to the outside, polyterafluoroethylene emulsion, hydrophilic nanometer silicon dioxide, organic thickeners and silane coupling agents are mixed with one another and are subjected to dip-coating to form the base layers, a surface layer is coated on the polyterafluoroethylene layer on the upper surface of the glass fiber cloth layer, polyterafluoroethylene emulsion, BIO-PRUE, nanometer silicon dioxide and dispersing agents are mixed with one another and are subjected to dip-coating to form the surface layer, and a PTFE (polyterafluoroethylene) surface treating agent layer, an environment-friendly mixed adhesive layer and a release paper layer are sequentially coated on the polyterafluoroethylene layer on the lower surface of the glass fiber cloth layer. The polyterafluoroethylene fireproof self-cleaning wall cloth film has the advantages that the width of the film ranges from 0.53m to 4.2m, the thickness of the film ranges from 0.13mm to 0.35mm, the tensile strength (warp / weft) of the film is higher than or equal to 4500 / 3800(N / 5cm), the peel strength of the film is higher than or equal to 40 / 30(N / 5cm), and accordingly architecture, structural mechanics, fine chemicals and material science are integrated on the decorative fireproof self-cleaning wall cloth film.

The invention discloses an organic electroluminescent device which comprises a transparent substrate layer, an anode layer, an organic electroluminescent structure and a cathode layer sequentially superposed. The transparent substrate layer is provided with a first surface and a second surface which are opposite to each other. The first surface is provided with convex lens-type convex parts arranged in array, and the second surface and the anode layer are superposed. The organic electroluminescent structure comprises an exciton balance layer and at least a luminescent layer superposed with the exciton balance layer. The organic electroluminescent device is high in luminescent efficiency and brightness and stable in luminescent efficiency and chromaticity coordinates. The preparation method of the organic electroluminescent device is simple in process, improves the production efficiency, reduces the production cost and is appropriate for industrialized production.

The invention discloses waterborne polyurethane thermal-insulating sound-absorbing coating and a preparation method thereof. The waterborne polyurethane thermal-insulating sound-absorbing coating comprises a polyurethane prepolymer, N-hydroxymethyl acrylamide, phthalic acid dibutyl ester, a zirconium-aluminic acid ester coupling agent, rutile titanium dioxide, methylsilicone oil, a mixed solvent and a sound-absorbing material. The preparation method comprises the following steps: dissolving every 1 kg by weight of N-hydroxymethyl acrylamide in 2 kg of 50-70% ethanol in volume concentration, mixing with the polyurethane prepolymer in a reaction kettle, enabling the components to react for 1 hour at 80-150 DEG C, and adding the zirconium-aluminic acid ester coupling agent to continuously react for 2-5 hours; subsequently adding the phthalic acid dibutyl ester, rutile titanium dioxide, methylsilicone oil, mixed solvent and sound-absorbing material, and uniformly mixing, thereby obtaining a waterborne polyurethane thermal-insulating sound-absorbing coating product. The waterborne polyurethane thermal-insulating sound-absorbing coating can insulate heat and absorb sound, and is good in chemical resistance, good in temperature resistance, good in weather resistance, long in film service life, free of toxicity or smell, safe and environment-friendly and good in sound absorption effect.

The invention relates to a tunnel empty-hole mud vibration-reduction-control blasting method capable of reducing vibration and noise. According to the method, hole drilling is positioned according to a drilling and blasting arrangement diagram; before powder charging, high-pressure air is used for sweeping holes, rock emulsion explosives and non-electric second-delay detonators are respectively selected, the powder charging holes are charged with powder according to a vibration reduction blasting parameter design list, the periphery holes are charged with the powder at intervals, the rest of the blastholes are continuously charged with the powder, the powder are charged to the bottoms of the holes, tamping is used for plugging the holes in place, and the empty holes are filled with plastic bags with mud; and the detonators are connected in place according to requirements, equipment and persons are all evacuated outside the safe distance, and detonation is carried out after the equipment and the persons are confirmed to be safe. The method has the advantages that the hole bottom blasting force can be enhanced, the blasting footage can be increased, particularly, reflection, refraction and absorption of the blasting shock waves can be strengthened, the process of shock wave->attenuating->stress wave->attenuating->seismic wave can be accelerated, the blasting vibration and noise can be greatly reduced, the blasting vibration speed is detected to be lees than 5cm / s, the phenomenon that people are disturbed can be greatly reduced, and the good technical economic effect can be obtained.

The invention provides a refractive correction AR display device and wearable AR equipment. The display device includes an image projection device and an optical path assembly; the image projection device includes an image source; and the optical path assembly includes a spectroscope and a refractive correction lens which are in successive arrangement. Through the technical schemes, the integratedlevels of a system can be enhanced, the complex degree of the system can be reduced, the weight of the system can be decreased, the number of lenses through which human eyes observe extraneous environments can be decreased, light transmittance can be enhanced, stray light can be decreased, and requirements of the system on exit pupil distances can be reduced; a curved mirror which is only reflected once originally can increase refraction and reflection through the design; and the number of refraction surfaces can be increased under the premise that the system volume remains unchanged, so thatdegrees of freedom of design can be enhanced, bases can be provided for reducing aberration and enhancing optical performance, and the definition of an imaging system can be higher and viewing anglescan be larger while the volume is decreased.

The invention provides a scratch-resistant high viscosity flexible photovoltaic reflective film which comprises a prism layer, a base material layer and a hot melt adhesive layer. The hot melt adhesive layer is arranged below the base material layer. The prism layer is arranged on the base material layer. The prism layer is composed of a number of triangular prism structures arranged in parallel. The invention further provides a preparation method of the scratch-resistant high viscosity flexible photovoltaic reflective film. The method comprises the steps that the triangular prism structure is prepared on the surface of a pressing roller in advance; mixed glue is applied on the upper surface of the base material layer; rubber covered roller passing and ultraviolet curing are carried out at the same time to acquire the prism layer of excellent strength; blend granulation is carried out on EVA, SIS and EAA resin in advance; and curtain coating is melt-extruded and coated on the lower surface of the base material layer to form the hot melt adhesive layer to acquire the scratch-resistant high viscosity flexible photovoltaic reflective film. The prepared scratch-resistant high viscosity flexible photovoltaic reflective film has the advantages of good strength, high reflectance and good oxidation resistance.

The invention relates to a method for synthesizing a Bi2O3 / (BiO)2CO3 composite photocatalytic material and belongs to the technical field of chemical industry. The method comprises the steps of weighing three kinds of chemical reagent raw materials, i.e., Na2CO3, bismuth citrate and NaOH according to a mole ratio, carrying out mixing, stirring the mixture in secondary distilled water for certain time, carrying out treatment by a programmed-heating hydrothermal process, then, carrying out repeated washing separately with deionized water and anhydrous ethanol, and carrying out baking, thereby obtaining the final product, i.e., the Bi2O3 / (BiO)2CO3 composite photocatalytic material. The surface morphology, microscopic structure and photocatalytic activity of the composite photocatalytic material are assayed, and the degradation of a variety of dyes such as rhodamine B under different light sources by the hierarchical garland-shaped Bi2O3 / (BiO)2CO3 composite photocatalytic material is greatly improved. The product is simple and practical in preparation process and stable in performance and has considerable applicability to a variety of dyes.

The invention discloses a color-masking zirconia veneer. The color-masking zirconia veneer is prepared by the steps of carrying out color masking after micro-sculptures of a zirconia veneer are processed, and finally carrying out sand blasting or processing a flake zirconia film. According to the color-masking zirconia veneer, micron-scale sculptures are prepared on the surface without mechanically damaging the material, and a porous flake surface from a nano scale to a micron scale is obtained by virtue of repeated film plating techniques before and after sintering, so that a mechanical interlocking structure between the specific surface area of the zirconia veneer and an adhesive, the adhesion bonding between the zirconia veneer and a natural tooth is enhanced, and the zirconia veneer can meet the clinical requirements on the adhesive property. The color-masking zirconia veneer has the beneficial effects that a color-masking function is considered, meanwhile, the strength of the zirconia veneer is guaranteed, and a very good aesthetic repairing effect is achieved.