185 results about "Near infrared reflectance" patented technology

In a near-infrared reflective substrate prepared by forming on a transparent substrate a near-infrared reflective film prepared by alternate deposition of low-refractive-index dielectric films and high-refractive-index dielectric films, there is provided a near-infrared reflective substrate characterized in that the transparent substrate is a plate glass or polymer resin sheet, that it is 70% or greater in visible light transmittance defined in JIS R3106-1998, and that it has a maximum value of reflection that exceeds 50% in a wavelength region of 900 nm to 1400 nm.

Roofing granules include a core having an average ultraviolet transmission of greater than sixty percent and an average near infrared reflectance of greater than sixty percent and a UV coating layer on the exterior surface. The coating provides UV opacity, while the core provides near infrared reflectance.

A modified synthetic polymer filament and multifilament yarn of polyamide or polyester filament containing a carbon black polymer additive, and fabrics from these yarns, are disclosed. These melt spun filaments are especially well-suited for use in garments and equipment where a modified Near Infrared Reflectance (NIR) signature is desired. The yarn and fabrics made from this yarn may be advantageously dyed or printed to provide a camouflage fabric for use in desert sand dominated environments, urban environments and multi-terrain environments.

The invention discloses a colored solar heat reflection and heat-insulation coating. The coating is prepared from the following raw materials: polymer emulsion, titanium dioxide, functional fillers, an infrared reflection pigment, kaolin, ground calcium carbonate, a dispersing agent, a wetting agent, a defoaming agent, a thickening agent, a film-forming additive, a preservative, and water. The colored solar heat reflection and heat-insulation coating provided by the invention has the advantages that a coating film with a high reflectivity is prepared through adoption of the components, addition of the functional fillers (glass microbeads, ceramic microbeads and floating beads) which are large in refraction coefficient and high in scattering capability and reflectivity, as well as the pigment which is large in infrared reflection ratio, and application of film-forming matters and the film-forming additive, so that the coating achieves good heat-insulation performance, multiple selectable colors, excellent elasticity, high stain resistance, as well as large solar and near-infrared reflection ratios.

An optical filter and an imaging device comprising the optical filter are provided. The optical filter comprises: a binder resin; a light absorption layer containing at least two kinds of light absorbents dispersed in the binder resin; and a near-infrared reflection layer.

A modified synthetic polymer filament and multifilament yarn of polyamide or polyester filament containing a carbon black polymer additive, and fabrics from these yarns, are disclosed. These melt spun filaments are especially well-suited for use in garments and equipment where a modified Near Infrared Reflectance (NIR) signature is desired. The yarn and fabrics made from this yarn may be advantageously dyed or printed to provide a camouflage fabric for use in desert sand dominated environments, urban environments and multi-terrain environments.

An object of the present invention is to provide large-sized zinc oxide particles that show, when incorporated to a cosmetic product, excellent properties including transparency, infrared reflection, and the like without deteriorating the feel; and also a cosmetic containing the same.The zinc oxide particles having an average particle diameter of 3 to 20 μm, an average friction coefficient of 3 or less, a total visible light transmittance of 85% or more, and a near-infrared reflectance of 80% or more.

The invention discloses a method for extracting glacial lakes in a highland area based on a remote sensing satellite image. The method comprises the steps of (1) obtaining the remote sensing satelliteimage and DEM data and carrying out pre-processing on the remote sensing satellite image and the DEM data, (2) carrying out global glacial lake crude extraction which comprises a step of obtaining anormalized different water index (NDWI) value of a whole region according to pre-processed remote sensing satellite image, combining a near infrared reflectance (NIR) value and a short wave infraredreflectance (SWIR) value, setting threshold values of NDWI, NIR and SWIR for the whole image, and eliminating the influences of glaciers and other ground features and a step of generating a slope mapof the area by using pre-processed DEM data, setting a slope threshold value and removing the effect of a hill shadow, and roughly extracting all glacial lakes and mixed backgrounds, and (3) carryingout local glacial lake fine extraction which comprises the steps of introducing a C-V model of a symbolic pressure function to accurately extract the glacial lakes one by one based on a result of glacial lake crude extraction. According to the extraction method of the invention, various factors affecting the extraction of the glacial lakes can be effectively removed, accurate extraction is achieved, and the method also has a good extraction result for smaller glacial lakes in the image.

The present invention is directed to apparatus for enhancing the performance of visual display units which utilize plasma display panels. More specifically, the present invention provides apparatus for providing an electrical noise suppressing / chromaticity enhancing accessory device for positioning in front of the viewing surface of a plasma display panel (PDP). In its most basic embodiment, the accessory device of the present invention comprises an optically selective coating providing high photopic transmittance, continuous high electrical conductivity for RFI shielding, and reflectivity specifically within the near-IR region. It also preferably includes a multiple-dye coating for selectively absorbing IR energy emissions and selectively balancing the chromaticity of the PDP display and a plastic substrate layer to provide impact resistance. The combination of the IR absorption and color-correction due to the multiple-dye coating and the near-IR reflectivity due to the optically selective coating surprisingly results in very good suppression of IR emissions from the PDP within the spectral range of about 800 to about 2500 nm and chromaticity enhancement while simultaneously maintaining good photopic transmittance.

The invention relates to an estimation method for the content of copper in soil on the basis of visible-light near-infrared spectrum technology. The estimation method is realized by the following six steps: (1) collecting a soil sample; (2) determining a visible-light near-infrared spectrum; (3) pretreating the spectrum; (4) determining the reference value of the content of copper in soil; (5) establishing an estimation model; and (6) estimating the content of copper in an unknown soil sample. The estimation model between the visible-light neared-infrared reflectivity spectrum and the content of the copper is established by utilizing a wavelet neural network method on the basis of the visible-light near-infrared spectrum technology, so that the visible-light neared-infrared reflectivity spectrum of the unknown soil sample is substituted into the estimation model and further the content of the copper in the unknown soil sample is determined. The estimation method has the advantages that the determination can be performed without direct contact with the sample, and is complete non-destructive measurement, the operation process and the calculation method for the content of the copper in the soil are simple, the determination speed is greatly enhanced, no other chemical reagents need to be added and the like, so that the estimation method is environmental-friendly and pollution-free.

A system and method for non-destructively determining characteristics of a vegetable or fruit may include processing an image of the vegetable or fruit to produce image analysis results; analyzing light emitted by a Near Infrared Reflectance (NIR) device and reflected from the vegetable or fruit to produce reflection analysis results; and calculating at least one value that reflects at least one characteristic of the vegetable or fruit based on the image analysis results and based on the reflection analysis results.

A method and system for predicting the content level of components in materials based on the response of the materials to near infrared radiation. One embodiment comprises electronically receiving a near infrared reflectance spectrum of a material from a customer, predicting the content level of a component in the material based on the spectrum, and electronically reporting the prediction to the customer. Another embodiment includes the exchange of the customer request and prediction report on a Web site or by electronic mail. Other embodiments include the prediction reports, and uses of the predictions, for example in quality control and toxicity evaluation.

Roofing granules include a core having an average ultraviolet transmission of greater than sixty percent and an average near infrared reflectance of greater than sixty percent and a UV coating layer on the exterior surface. The coating provides UV opacity, while the core provides near infrared reflectance.

The invention discloses a multilayer radiation cooling coating and a preparation method thereof. The multilayer radiation cooling coating comprises an ultraviolet reflection surface coating, a visiblelight reflection floating coating and a near-infrared reflection base coating, wherein the ultraviolet reflection surface coating contains an ultraviolet reflection material, the visible light reflection middle coating contains a visible light reflection material, and the near-infrared reflection bottom coating contains a near-infrared reflection material. By utilizing the synergistic effect of the ultraviolet reflection surface coating, the visible light reflection floating coating and the near-infrared reflection base coating, extremely high sunlight reflectivity can be generated, the process is simple, the cost is low, and the coating is suitable for special shapes and planes and can be applied to occasions such as residential buildings, commercial buildings and industrial factory buildings and has a wide application prospect.

The present invention is directed to methods and apparatus for enhancing the performance of visual display units which utilize plasma display panels. More specifically, the present invention provides methods and apparatus for providing an electrical noise suppressing / chromaticity enhancing accessory device for positioning in front of the viewing surface of a plasma display panel. In its most basic embodiment, the accessory device of the present invention comprises a first and a second rigid substrate laminated together by a laminating layer; an optically selective coating providing high photopic transmittance, continuous high electrical conductivity for RFI shielding, and reflectivity specifically within the near-IR region that is mechanically protected by being sandwiched between one rigid substrate and the laminating layer; and, a multiple-dye coating for selectively absorbing IR energy emissions and selectively balancing the chromaticity of the PDP display. The combination of the IR absorption and color-correction due to the multiple-dye coating and the near-IR reflectivity due to the optically selective coating surprisingly results in very good suppression of IR emissions from the PDP within the spectral range of about 800 to about 2500 nm and chromaticity enhancement while simultaneously maintaining good photopic transmittance.

The invention provides a building reflective heat-insulating coating, which is made of the following raw materials in parts by weight: emulsion: 300-500 parts, reflective functional filler: 50-90 parts, other pigments and fillers: 150-200 parts, hydroxyethyl Cellulose: 1‑2 parts, defoamer: 2‑5 parts, PH regulator: 1‑3 parts, wetting agent: 2‑4 parts, dispersant: 3‑8 parts, thickener: 3‑6 parts leveling agent: 6‑12 parts, preservatives: 1‑3 parts, antifreeze: 8‑15 parts, film-forming aids: 1‑3 parts, deionized water: 300‑500 parts. The present invention also provides its preparation method. The present invention adopts rutile type titanium dioxide, hollow glass microspheres, solid ceramic microspheres, reflective powder, and anti-ultraviolet inorganic powder as fillers to blend together with styrene-acrylic emulsion and pure acrylic emulsion in a suitable ratio. The prepared coating has the advantages of energy saving and environmental protection, high reflectivity of visible light, high reflectivity of near-infrared, high hemispherical reflectivity, high heat insulation index and the like.

The invention discloses an automatic monitoring system of greenhouse crop growth conditions based on a reflection spectrum, comprises a first screw rod, a second screw rod and a third screw rod, wherein a sliding block with a threaded hole is respectively sleeved on the three screw rods, and the movement of any points in the three-dimensional space can be realized by a stepping motor; and a camera and a reflection probe are arranged on one screw rod, and a near-infrared light source, a spectrometer, an industrial personal computer and a relay are arranged on another screw rod. The monitoring system is capable of automatically adjusting the space position of the reflection probe by combining the reflectance spectrum and image information under the control of a remote computer and calculating a plurality of indexes, such as leaf area index, water content, chlorophyll content, and the like on the basis of the visible / near-infrared reflectance spectrum, thereby analyzing the growth conditions of crops and providing the reference for growth management of the crops. The whole system has simple structure, low cost and high automation level and realizes the aims of fast and dynamically monitoring the growth conditions of the crops in loss-free, all-sided and multi-index forms.

The invention belongs to the technical field of inorganic powder surface modification, and in particular relates to modified fly ash with surface coated with SiO2 and a preparation method and use thereof, the method is as follows: Step 1) fly ash iron removal, step 2) capillary adsorption paraffin, step 3) coating of the surface with SiO2, the water absorption rate of the modified fly ash prepared by the method is 20%-22%, the whiteness is 20-30, the near infrared reflectivity is 60-80%, the coefficient of thermal conductivity is less than 0.25W / M.K; and the modified fly ash prepared by the method has good barrier thermal insulation and reflective thermal insulation performances. A thermal insulation coating prepared from the modified fly ash has excellent thermal insulating property, can be used in epoxy floor coatings, acrylic coatings for exterior wall, casting coatings and the like, and is free of the color and the construction problems, and high in added value.

The invention relates to a colored solar heat reflective cooling coating and a preparation method thereof. By using a waterborne acrylic emulsion as a film forming base material, the coating is good in anti-aging performance, long in outdoor service life, non-toxic and environmental friendly, has excellent resistance to stains, alkali resistance and water resistance and has a good adhesive force to base materials such as concrete, metals, woods and glass. By adding color functional auxiliaries with strong near infrared reflection or transmissivity supplemented by various extender pigments and auxiliaries, the coating is simple to prepare, low in cost and environmentally friendly. Compared with common colored coatings, the colored solar heat reflective cooling coating has better near infrared reflection or transmissivity, thereby satisfying the latest requirements on industrial standard of building industry. In winter, the coating can be used for remarkably improving the surface and inner temperatures of a coated object such as concrete, metals and woods, can be widely applied to building roofs and exterior walls and further has ideal energy-saving and cooling effects while being used for beautifying the coated building.

[Problem] Provided is a near-infrared reflective film having an excellent near-infrared reflectivity, and a high transmittance in the visible light region, and not having visible light reflectivity irregularity, and a near-infrared reflector provided with the film.[Solving means]A near-infrared reflective film having a constitution in which, on a base material, a high refractive layer containing a water-soluble polymer and a metal oxide particle having a refractive index higher than the refractive index of the water-soluble polymer and a low refractive layer containing a water-soluble polymer and a metal oxide particle having a refractive index lower than the refractive index of the water-soluble polymer are alternately laminated individually in two or more layers, characterized in that, letting the total number of the layers of the high refractive layer and the low refractive layer be n, the total film thickness of the component layers from the region of n / 2 to the base material be Σd1 and the total film thickness of the component layers from the region of n / 2 to the outermost layer be Σd2, the film thickness ratio Σd1 / Σd2 is from 1.05 to 1.80.

The invention discloses radiated-cooled glass and a preparation method thereof. The radiated-cooled glass comprises a glass substrate, at least one oxide layer and a coating layer which are disposed in sequence, wherein the oxide layer has a certain visible light transmittance and a high near-infrared reflectance, and the coating layer comprises a light-transmitting polymer material and inorganicparticles dispersed in the polymer material; the inorganic particles have a high emissivity in a wavelength band of 7 to 14 [mu]m. The radiant-cooled glass disclosed by the invention has good opticalproperties, and the transmittance of visible light in the sunlight can be adjusted between 40 percent and 90 percent, and the reflectance of the visible light is very low; compared with traditional coated glass, the radiated-cooled glass has greatly improved optical performance; the radiant-cooled glass disclosed by the invention also has excellent thermal properties, can realize passive cooling of buildings when applied to the buildings, and meets the requirements of energy saving and environmental protection.

Disclosed are solar-reflective roofing and other building materials having high reflectance of near-infrared radiation and high transmission of radiation in the visible light range and a substantial emissivity so as to reduce the heat island effects experienced by the articles while also maintaining an aesthetically pleasing appearance. Also disclosed are related methods for fabrication of such materials.

An infrared-cut filter (1a) includes a near-infrared reflecting film (20) and an absorbing film (30). The near-infrared reflecting film (20) and the absorbing film (30) have the following features (A) to (E); (A) 700 nm≤λHR (0°, 70%)<λHR (0°, 20%)≤770 nm; (B) 650 nm≤λHR (40°, 70%)<λHR (40°, 20%)≤720 nm; (C) λHA (40°, 20%)<λHR (40°, 20%); (D) the spectral transmittance of light incident on the absorbing film (30) is 15% or less at λHR (0°, 20%) and λHR (40°, 20%); and (E) an average of the spectral transmittance of light incident on the near-infrared reflecting film (20) and an average of the spectral transmittance of light incident on the absorbing film (30) are 75% or more in the wavelength range of 450 to 600 nm.

The invention discloses a bismuth oxychloride near-infrared high-reflection heat-insulating pigment particle and a preparation method thereof, belonging to the technical field of heat-insulating materials. Dissolve the mixture prepared by bismuth source, chlorine source, and protective agent in a solvent in a certain proportion, adjust the pH of the system, disperse ultrasonically for a period of time, then transfer the mixture into the reactor, seal it, put it in an oven, and keep it warm. Then, with the furnace cooling to room temperature, the product in the reactor was washed several times by centrifugation alternately with distilled water and absolute ethanol, and then the powder was dried in a vacuum oven at 70°C for 12 hours. After calcining at high temperature for a period of time, the obtained powder is put into a mortar and ground to obtain bismuth oxychloride high-reflection heat-insulating pigment particles. The preparation method of the present invention adopts a solvothermal method. The prepared near-infrared reflective pigment has good color performance, high yield, high near-infrared reflectivity, uniform particle size distribution, good structural stability, high reaction purity, short reaction cycle, easy control of the reaction process and the like.

The invention is applicable to the field of coatings, and provides a color reflective heat-insulation exterior wall elastic coating and a preparation method thereof. The color reflective heat-insulation exterior wall elastic coating includes strong hydroxyethyl cellulose, ordinary emulsion, elastic emulsion and the like. The color reflective heat-insulation exterior wall elastic coating using the components in ratio has good heat-insulation performance, a variety of colors for selection, excellent elasticity, good contamination resistance and the like, total solar reflectance ratio and near infrared reflectance ratio are high, selected raw materials are preferably environmental-friendly, and the harm to the environment and human body is reduced.

The invention relates to a hyperspectral stealth coating. The coating comprises, by mass, 40-50% of an adhesive, 14-17.5% of a pigment filler, 0-20% of a functional filler, 0.5-1% of an assistant and14-18% of an organic solvent. The hyperspectral stealth coating and the coating layer have excellent hyperspectral reconnaissance prevention performance; in 0.4-2.5 [mu]m, the ratio of the average value of the near-infrared (710-880 nm) reflectivity of the hyperspectral stealth coating to the average value of the reflectivity of the red light region (620-660 nm) is greater than 5; the reflectivityrange of the spectral reflectivity at 1200 nm is 40-60%; the reflectivity at 1400 nm is 30-50%; the reflectivity at 1800 nm is 20-40%; the reflectivity range at 2500 nm is 0-20%; the 60 DEG gloss ofthe hyperspectral stealth coating is smaller than 5 gloss units; and the national military standard requirement is met, the hyperspectral reconnaissance resistance stealth performance which a traditional stealth material does not have is achieved, and the confrontation waveband is expanded to 0.4-2.5 [mu]m. In addition, the invention also relates to a preparation method of the hyperspectral stealth coating, and a hyperspectral stealth coating layer.

Preparation of an infrared observation indication device includes an infrared conversion material coating, a near infrared reflection material layer and a radiating basic substrate. The preparation is characterized in that the near infrared reflection material layer is coated on the radiating basic substrate, and the infrared conversion material coating is coated on the surface of the near infrared reflection material layer. When near infrared laser radiates the infrared conversion material coating, medium and far infrared radiation and visible light are produced in conversion and are strengthened by the near infrared reflection material layer. Radiating is finished by the basic substrate, and a vision or infrared thermal imager is utilized for observation. Various invisible near infrared band light beams are converted into visible light and medium and far infrared light, facula images are displayed, and detection, tracking, correction and recognition of the infrared light beams can be effectively achieved. The preparation can be used for near infrared light detection, infrared light-emitting diode transmission light tracking, correction of large laser light beam like yttrium aluminum garnet (YAG), optical communication signal detection, infrared security, game control system and military and the like of various semiconductor lasers.

The invention discloses a deep brown near-infrared reflection type heat insulation coating and a preparation method thereof. The heat insulation coating comprises the following components in percentage by weight: 60.5%-68.5% of a film forming material, 23%-27% of near-infrared reflection pigment, 8%-12% of a solvent and 0.3%-0.5% of an assistant, wherein the near-infrared reflection pigment is powder with a general formula of Zn(1-x)MgxFe2O4, and in the formula, x is 0, 0.1, 0.2, 0.3 or 0.4. The preparation method comprises the following steps: mixing the raw materials of the near-infrared reflection pigment, heating in a water bath, drying, and calcining to obtain the near-infrared reflection pigment powder; uniformly mixing the film forming material, the solvent and the assistant according to the ratio of the heat insulation coating, adding the near-infrared reflection pigment, uniformly stirring, and fully dispersing the pigment to obtain the near-infrared reflection type heat insulation coating. The heat insulation coating is environment-friendly and good in heat reflection and heat insulation properties.

The invention provides a preparation method of waterborne polyurethane reflective insulation coating. The coating is formed by blending a first component and a second component according to the ratio of {4-10}:1. The first component is prepared from waterborne polyhydroxy hydroxy acrylic resin, high near-infrared reflection white pigment, silicon dioxide aerogel, filler, high near-infrared reflection yellow pigment, high near-infrared reflection brown pigment, high near-infrared reflection red pigment, high near-infrared reflection blue pigment, high near-infrared reflection black pigment, deionized water and auxiliaries. The second component is prepared from waterborne aliphatic polyisocyanate based on HDI, and propylene glycol monomethyl ether. The preparation method includes the steps of conducting drying, preparing the first component, preparing the second component and blending the first component and the second component. The coating has high near-infrared reflectivity, high medium-and-far-infrared reflectivity and low heat conductivity and can be applied to building external walls, absorption of the external walls to sunlight radiation energy can be remarkably reduced, indoor temperature is reduced, the heat insulation temperature difference can reach more than 10 DEG C, and energy consumption of an air conditioner is reduced.