184 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.

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.

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 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.

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 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 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.

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 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.

The invention discloses a yellow architectural coating with high near-infrared reflectivity and a preparation method thereof, which comprises the following main components in parts by weight: 20-25 parts of water, 0.5-1 part of cellulose, 25-40 parts of emulsion, and 25-40 parts of filler. 40 parts, 5-10 parts of white near-infrared reflective material, 2-6 parts of yellow near-infrared reflective material, 0-5 parts of iron yellow, 4-10 parts of coating additive. Compared with common yellow architectural coatings, the invention can increase TSR by more than 10% and NIR by more than 20%.