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57 results about "Reflectance factor" patented technology
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Reflectance Factor, n – ratio of the flux reflected from the specimen relative to the flux reflected from the perfect reflecting diffuser under the same geometric and spectral conditions of measurement.
Method for using remotely sensed data to provide agricultural information
ActiveUS7068816B1Reduce adverse effectsEasy for producerMaterial analysis by optical meansCharacter and pattern recognitionReflectance factorComputer science
The present invention is directed to a method for producing agricultural information on an area of interest, with the information based on raw, remote imaging data that is typically produced by a sensor associated with a satellite or aircraft. In one embodiment, the method includes processing raw, remote imaging data to produce reflectance factor data on the land of interest. The reflectance factor data is then used to produce agriculturally significant information. In one embodiment, a soil zone index map is produced for the land of interest. In another embodiment, the reflectance factor data is used to produce a green vegetation index map. In yet a further embodiment, the reflectance factor data at two points in time is used to produce a map for the land of interest that indicates the change in the green vegetation index over time.
Owner:JPMORGAN CHASE BANK NA
Apparatus and method for determining precision reflectivity of highway signs and other reflective objects utilizing an optical range finder instrument
An apparatus and method for measuring coefficients of retroreflectance of retroreflective surfaces such as road signs involves use of a modified light based range finder. The apparatus includes a power attenuation factor data base which relates pulse width of received pulses to power attenuation of the transmitted pulses. The range finder calculates target range based on time of flight of light pulses. The apparatus automatically calculates the absolute coefficient of retroreflectance for an unknown reflective surface being measured by comparison of the measurement to a reading with the same instrument of a known reflectance standard. The method involves either recalling a stored standard reference reflectance factor or determining a reflectance factor via the range finder for a sample of retroreflective material with a predetermined coefficient of retroreflectance, and then measuring the distance to an unknown target, determining a power attenuation factor from the received pulse width from the unknown target and then calculating the absolute coefficient of retroreflectance based upon these determined values of power attenuation factor, distance and the reference reflectance factor.
Owner:KAMA TECH CORP +1
Apparatus and method for determining precision reflectivity of highway signs and other reflective objects utilizing an optical range finder instrument
An apparatus and method for measuring coefficients of retroreflectance of retroreflective surfaces such as road signs involves use of a modified light based range finder. The apparatus includes a power attenuation factor data base which relates pulse width of received pulses to power attenuation of the transmitted pulses. The range finder calculates target range based on time of flight of light pulses. The apparatus automatically calculates the absolute coefficient of retroreflectance for an unknown reflective surface being measured by comparison of the measurement to a reading with the same instrument of a known reflectance standard. The method involves either recalling a stored standard reference reflectance factor or determining a reflectance factor via the range finder for a sample of retroreflective material with a predetermined coefficient of retroreflectance, and then measuring the distance to an unknown target, determining a power attenuation factor from the received pulse width from the unknown target and then calculating the absolute coefficient of retroreflectance based upon these determined values of power attenuation factor, distance and the reference reflectance factor.
Owner:KAMA TECH (HK) LTD +1
Multi-angle colorimeter
ActiveUS20050286053A1Radiation pyrometryScattering properties measurementsApproximation functionReflectance factor
In a multi-angle calorimeter having an illumination system that illuminates a sample surface and a plurality of light receiving systems that receive reflected light therefrom, an illumination system for orientation error detection is provided that illuminates the sample surface from substantially close direction to the normal of the sample surface. Actual measured reflectance factor is corrected based on the specific approximation function obtained from the measured reflectance factor and detected orientation error.
Owner:KONICA MINOLTA SENSING INC
Multi-angle colorimeter
ActiveUS7262854B2Radiation pyrometryScattering properties measurementsApproximation functionReflectance factor
In a multi-angle colorimeter having an illumination system that illuminates a sample surface and a plurality of light receiving systems that receive reflected light therefrom, an illumination system for orientation error detection is provided that illuminates the sample surface from substantially close direction to the normal of the sample surface. Actual measured reflectance factor is corrected based on the specific approximation function obtained from the measured reflectance factor and detected orientation error.
Owner:KONICA MINOLTA SENSING INC
Method for compensating a picture
InactiveCN1940695ACompensate brightnessImage enhancementTelevision system detailsAmbient lightingControl signal
A method for compensating an image produced by image means for implementing image information takes account of ambient illumination. Luminance of external background illumination around the image means is measured. The measured luminance of the background illumination is compared with preset tristimulus values and a reflectance factor of the image means, a comparison result is computed, and a control signal is generated to compensate luminance and chroma of an image. Luminance and chroma of the image means are compensated in response to the control signal.
Owner:SAMSUNG ELECTRONICS CO LTD
Method for rapidly detecting film coating stain resistance of emulsion paint
ActiveCN103018212ATest results are stableShort detection cycleScattering properties measurementsReflectance factorStain
The invention belongs to the field of detecting quality of an emulsion paint, and in particular relates to a method for rapidly detecting film coating stain resistance of an emulsion paint The method comprises the following steps of: detecting original reflectivity coefficients of a maintained coating test panel on at least three positions, and taking an average value A; completely immersing the test panel in fine linseed oil for 1min, and taking out; scratching and removing residual fine linseed oil on the surface of a paint film; scattering fly ash on the surface of a coating until the coating is completely covered; drying for 12h at temperature of 21-25 DEG C and under a relative humidity of 45-55%, and testing; adding 15L of water into the water tank of a flushing device; opening a valve to a maximum flushing sample; continuously moving the sample, so that various parts of the sample can pass through the water flow point; flushing for 1min; closing the valve, drying the sample for 30min at 48-52 DEG C; testing reflectivity coefficients of the coating sample on at least three positions, and taking an average value B; and calculating the reflectivity reduction rate of the stain resistance of the coating. The new emulsion paint film coating stain resistance detecting method disclosed by the invention can greatly shorten the detecting cycle and guarantee a stable detection result.
Owner:SKSHU PAINT
Method for compensating an image
ActiveUS20070070091A1Television system detailsColor signal processing circuitsAmbient lightingControl signal
A method for compensating an image produced by image means for implementing image information takes account of ambient illumination. Luminance of external background illumination around the image means is measured. The measured luminance of the background illumination is compared with preset tristimulus values and a reflectance factor of the image means, a comparison result is computed, and a control signal is generated to compensate luminance and chroma of an image. Luminance and chroma of the image means are compensated in response to the control signal.
Owner:SAMSUNG ELECTRONICS CO LTD
Correction method for sensor output
InactiveUS7110901B2High speedLow costPhotometry using reference valueRecord information storageCMOSPhotovoltaic detectors
Above a measuring object (2), an LEDs (4) for use in light irradiation and a CMOS area sensor (8) with an image-forming lens (6) interpolated in between are installed. In order to detect the quantity of light from the LEDs (4), a photodetector (10) is further placed. A personal computer (28) carries out a linearizing process which, upon variation of the quantity of light, corrects the output of the area sensor (8) so as to make the output from the area sensor (8) proportional to the output of the photodetector (10), and a light-irregularity correction process which, when a flat plate having even in-plane density is measured as the measuring object (2), corrects the resulting output of each pixel in the area sensor (8) that has been corrected by the linearizing process to have in-plane evenness. It becomes possible to achieve a convenient two-dimensional reflection factor measuring method which does not need any mechanical driving system.
Owner:ARKRAY INC
LED assembly with color temperature correction capability
InactiveUS20100001297A1Low costEasy to correctSolid-state devicesSemiconductor devicesRefractive indexReflectance factor
An illumination assembly is provided which is capable of correcting a color temperature. The assembly generally comprises a substrate and a light emitting device mounted on the substrate that further comprises a light emitting element and a resin containing a phosphor excitable by light emitted from the light emitting element. A reflectance factor of the substrate may be set corresponding to light emitted from the light emitting device, such that the light emitted by the light emitting device complies with a desired light emission for the illumination assembly. A translucent filling resin or translucent coating resin may further be applied on the light emitting device and the substrate, the translucent resin having a refractive index and correspondingly operable to suppress variations in color temperature. The assembly may comprise a plurality of light emitting devices having variable light color temperatures, wherein a plurality of substrate coatings may be provided having reflectance factors corresponding to the associated light color temperatures. One or more translucent resins may be applied on light emitting devices as desired to further suppress variations in color temperature.
Owner:PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Computer graphics using meshless finite elements for light transport
Computer graphics methods, systems, apparatus and computer program code (software) products comprise: constructing a sparse implicit scene representation, wherein the representation is independent of geometric encoding and complexity of the input scene description, and the density of the resulting finite elements is proportional to their contribution to the final image to be generated, such that the geometric resolution of a given area of the obtained scene representation is proportional to its importance relative to the final image, wherein the constructing comprises using a Monte Carlo or quasi-Monte Carlo path tracing method to sample an adjoint importance distribution function and to shoot importons from a simulated camera into the scene, recording, for each simulated bounce, a particle i defined by selected information, the selected information comprising: 3D position pi, surface normal ni, and reflectance factor pi.
Owner:MENTAL IMAGES
Method and device for acquiring streaming potential of nano-filtration
InactiveCN101221198AAccurate valueReliable valueCurrent/voltage measurementMaterial electrochemical variablesMeasurement deviceFiltration
Owner:TSINGHUA UNIV
Optical system for measuring retro-reflecting coefficient
ActiveCN104406937AExtended service lifeUniform incidenceScattering properties measurementsBeam splitterReflectance factor
The invention relates to an optical system for measuring a retro-reflecting coefficient. The optical system comprises an illumination light source, a spectroscope, a reflector, an achromatic objective, a glass filter and a photodiode receiver, wherein the spectroscope is arranged below the illumination light source; the spectroscope, the achromatic objective, the glass filter and the photodiode receiver are arranged on the left and right sides of the illumination light source and the spectroscope respectively; the illumination light source comprises a warm white LED (Light-Emitting Diode) lamp, as well as a light source microporous diaphragm, a soft lens and a scattered light processing device, which are sequentially arranged below the warm white LED lamp; the spectroscope is a transmission and reflection type spectroscope, and is obliquely arranged below the scattered light processing device; the reflector is a reflex reflector, and comprises a large reflector and a small reflector, which are arranged in a pair. The optical system has the characteristics of small size, high accuracy, convenience in operation, variable incident angle and observation angle and the like.
Owner:ANHUI UNION SAFE TECH
Measuring method and instrument comprising image sensor
ActiveUS7274829B2Reduce variationInhibition of variationPhotometry using reference valueSpectrum investigationCalibration curveReflection coefficient
A linearizing correction unit (104) carries out a linearizing correction process on the output of an image sensor (8) based upon linearizing correction data stored in a linearizing correction data holding unit (102), and a light-irregularity correction unit (108) carries out a light-irregularity correction process on the image sensor output that has been subjected to the linearizing correction process based upon light-irregularity correction data stored in a light-irregularity correction data holding unit (106). A refection factor calculation unit (110) calculates an integral value of the in-plane reflection factor of a test piece by using the output that has been subjected to the linearizing correction and light-irregularity correction with respect to pixel outputs of the image sensor (8) obtained when the test piece having in-plane density irregularities is measured. A quantifying unit (114) applies calibration curve data of a calibration-curve-data holding unit (112) to the integrated reflection factor obtained by the reflection factor calculation unit so that a sample density of the test piece is calculated.
Owner:ARKRAY INC
Anti-reflection coatings and coated articles
InactiveCN1372646ALayered productsChemical vapor deposition coatingReflectance factorVisual perception
A transparent or translucent coated article, comprising an optical substrate and one or more layers of anti-reflection material coated on at least a portion of the optical substrate, characterized in that said one or more layers having a thickness such that the article simultaneously has (i) a color, when viewed at a specified angle or angles, under a specified illumination, that is perceived to lie within a specified volume element of color space defined by the color's CIE chromaticity coordinates, and (ii) a perceived reflectance F=««S(»,¸)R(»,¸)d»d¸ that is less than or equal to 1.25F min , wherein » is wavelength, ¸ is incident angle, S(»,¸) is the human sensitivity function as a function of wavelength and incident angle, R(»,¸) is an average of p- and s-polarized reflectance, and F min is perceived reflectance minimized within the constraints imposed by said chromaticity coordinates.
Owner:彼得・D・霍兰 +1
Prefabricated plaster board
InactiveUS7208225B2Overcome disadvantagesAvoid the needCovering/liningsWallsSurface waterReflectance factor
The present invention provides a construction assembly for interior works, comprising:prefabricated elements, preferably flat prefabricated elements e.g. gypsum fiberboards, cement fiberboards, gypsum wall boards or plaster boards, wherein said prefabricated elements comprise a coating layer formed of at least one skim coat deposited on said prefabricated elements by a coating device; andat least one jointing material, e.g. a sealing coat, joint coat and / or joint pointing coat, which joints adjacent said prefabricated elements to form a substantially plane outer surface comprising the visible surface of said at least one jointing material and the visible surface of the skim coated prefabricated elements,wherein said at least one jointing material and said at least one skim coat comprise a mineral filler, a binder and water; and wherein the composition of said at least one jointing material and said at least one skim coat are adapted to each other, whereby said at least one jointing material and said skim coat form, both in a dry state, a substantially homogeneous outer surface having over substantially all its surface at least one of the parameters comprised in the group consisting of coloration, reflectance factor and surface water absorbability which is substantially homogeneous over said surface; and whereby said outer surface is ready to be decorated. For instance, said at least one of the parameters differs by no more than 10%, preferably no more than 5%, at different parts of the overall surface, so that at least 90%, preferably at least 95%, homogeneity is achieved.
Owner:CONTINENTAL BUILDING PROD OPERATING COMPANY
Method for compensating an image
A method for compensating an image produced by image means for implementing image information takes account of ambient illumination. Luminance of external background illumination around the image means is measured. The measured luminance of the background illumination is compared with preset tristimulus values and a reflectance factor of the image means, a comparison result is computed, and a control signal is generated to compensate luminance and chroma of an image. Luminance and chroma of the image means are compensated in response to the control signal.
Owner:SAMSUNG ELECTRONICS CO LTD
Method and device for estimating soil humidity of vegetation coverage area
ActiveCN110672640AEliminate vegetation impactWide coverageColor/spectral properties measurementsMoisture content investigation using microwavesSensing dataVegetation
The invention discloses a method and device for estimating the soil humidity of a vegetation coverage area, and belongs to the field of electronics, information and optical remote sensing. The methodcomprises the steps: firstly constructing a relation between an overall backward reflection coefficient and DDM reflection power through the data of a satellite-borne GNSS-R reflectometer; solving a vegetation reflection coefficient and an attenuation coefficient of the vegetation coverage area by utilizing the optical image data; fusing a relationship between a satellite-borne GNSS-R reflectometer data overall backward reflection coefficient and DDM reflection power and vegetation information in the optical data, and solving a relationship between a vegetation coverage area pure soil surfacereflection coefficient and the DDM reflection power; establishing a soil humidity and DDM reflection power regression model by utilizing the actually measured data of the soil humidity of the plurality of control points; and substituting GNSS-R data DDM reflection power of a certain point into the regression equation to invert the soil humidity. The implementation of the method is effective fusionof primary satellite-borne GNSS-R reflectometer data and multispectral remote sensing data images for jointly inverting the soil humidity of the vegetation coverage area.
Owner:WUHAN UNIV
Method of estimating trap from spectral reflectance factor
ActiveUS7573608B2Digitally marking record carriersDigital computer detailsComputational physicsReflectance factor
A method of estimating the trap of an overprint of at least two primary colors from the spectral density curve of the overprint by computing the amounts of the two primary colors that will produce a spectral density curve that matches the spectral density curve of the overprint, and then relating the amounts to one another.
Owner:SUN CHEM CORP
Ophthalmic lens
ActiveUS9389435B2Reduce the amount requiredSpectales/gogglesEye implantsAngle of incidenceFull width at half maximum
An ophthalmic lens having a front and back face, at least one including a filter, which provides the main face / filter with the following properties:an average blue reflectance factor within a wavelength ranging from 420-450 nm, which ≧5%, for an angle of incidence θ ranging from 0°-15°,a spectral reflectivity curve for θ, having:a maximum reflectivity at a wavelength <435 nm, anda full width at half maximum ≧80 nm, andfor θ ranging from 0°-15° and for θ′ ranging from 30°-45°, a parameter Δ(θ,θ′)=1−[Rθ′(435 nm) / Rθ(435 nm)], such that Δ(θ,θ′)≧0.6, whereRθ(435 nm) represents the reflectivity value of the main face / filter at a wavelength of 435 nm for θ, andRθ′(435 nm) represents the reflectivity value of the main face / filter at a wavelength of 435 nm for θ′.
Owner:ESSILOR INT CIE GEN DOPTIQUE
Spectacle lens provided with a permanent marking
Owner:ESSILOR INT CIE GEN DOPTIQUE
Non-dispersive whole-static method for non-fluorescent object spectral measurement
InactiveCN101131349AReduced passband requirementsReduce volumeColor/spectral properties measurementsSpecial data processing applicationsSpectral transmissionGrating
The invention discloses a non-spectroscopical static spectral measurement method of non-fluorescence objects, the method adopt computer or microprocessor controlled variable spectral power distribution light as a test lighting source, when the photoelectric sensor work in the linear range, through solving linear equation group to calculate the spectral reflectance factor, spectral transmission ratio or absorption spectrum of objects. This method do not need prism, grating, interferometer, filters, optical fiber components to split light, the detection device is small in size, can obtain high test accuracy and speed. The method of the invention does not have mobilizable mechanical parts, all static; reduces weight and power consumption of the system, thereby it is simple in structure, with low cost, has high reliability and engineering application feasibility.
Owner:HENAN UNIVERSITY OF TECHNOLOGY
Angle domain least square reflectivity inversion method based on coherent superposition
PendingCN113866825AAvoid Offset ArtifactsReduce sensitivitySeismic signal processingAdjoint state methodWave equation
The invention discloses an angle domain least square reflectivity inversion method based on coherent superposition, which relates to the technical field of exploration geophysics, and comprises the following steps of: parameterizing and linearizing a wave equation by using an angle domain reflection coefficient as a reflectivity model, and constructing a linear positive operator based on Bern approximation; then, calculating the gradient of linear inversion by using an adjoint state method; and finally, updating the reflectivity model in an angle domain by using a precondition conjugate gradient method; and carrying out automatic event tracking on the reflection axis on the inverted angle domain reflectivity gather, and then carrying out coherent superposition along the tracked event to obtain a final superposition imaging result. The method has the beneficial effects that the problem of offset illusion caused by speed errors is avoided, and a deep high-quality imaging result is obtained; the sensitivity of the least square migration to the speed error is reduced, the deep-ultra deep oil gas target can be accurately imaged, and finally the practical process of the least square migration in deep oil gas exploration is promoted.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Optical Article Comprising an Antireflective Coating with a Very Low Reflection in the Visible and Ultraviolet Regions
ActiveUS20180275316A1Reduce reflectionNeutral tint in transmissionSpectales/gogglesOptical partsAnti-reflective coatingAngle of incidence
This invention relates to an ophthalmic lens comprising a transparent substrate with a front main face and with a rear main face, at least one of the main faces being coated with a multilayered antireflective coating comprising a stack of at least one high refractive index layer (HI) having a refractive index higher than or equal to 1.55 and at least one low refractive index layer (LI) having a refractive index lower than 1.55, characterized in that:said at least one high refractive index layer (HI) is in direct contact with said at least one low refractive index layer (LI) forming a bilayer,said bilayer has a physical thickness lower than or equal to 60 nm,said bilayer is, in the direction moving away from said transparent substrate, in second to last place in said multilayered antireflective coating,said multilayered antireflective coating has a mean reflection factor RUV between 280 nm and 380 nm, lower than 5% for an angle of incidence in the range from 20° to 50°.
Owner:ESSILOR INT CIE GEN DOPTIQUE
Automated ink color matching of solids and tones
ActiveUS8467098B2Character and pattern recognitionMultiple digital computer combinationsPrinting inkReflectance factor
In the development of custom SPOT color inks, there will be only a single combination of pigments that will produce the correct color for both the solid tones and for one or more halftones intermediate between the full tone and the unprinted substrate. A novel system and method is presented for finding such a combination of colorants without requiring a complex suite of software algorithms. The method includes a search of a library of known colored inks printed onto a specified substrate and printed using specified printing conditions. Each record of such a library can contain, for example, the ink formula, the combination of colorants and resin, the spectral reflectance factor of the ink and substrate, color values (XYZ and CIELAB) of the solid ink color (100% tone) and 10% steps down to 0% (unprinted substrate). In such a database halftones can be specified in units of % (0% to 100%), but can also, for example, be given as 8-bit integers (0 to 255). In exemplary embodiments of the present invention, such a search locates the solid ink color that meets the color requirements and simultaneously meets the color requirements at one or more intermediate halftone steps. The claimed method can thus achieve a printing ink formula that produces a color match to a customer proof at both the solid color and at one or more halftones with ink coverages lying between the unprinted substrate (0% tone) and the fully printed substrate (100% tone).
Owner:SUN CHEM CORP
Image processing method and system applied in three-dimensional scene
ActiveCN106991717ASmall amount of calculationLower performance requirements3D-image renderingImaging processingDiffuse reflection
The embodiment of the invention provides an image processing method and system applied in a three-dimensional scene, the method comprises the following steps: first light source pixel information of a light source in the three-dimensional scene is determined; second light source pixel information obtained after diffuse degradation of the light emitted from the light source is determined based on the first light source pixel information and a diffuse-reflection factor from an object to the emitted light of the light source in the three-dimensional scene; and information display information of the object in the three-dimensional scene is adjusted according to the second pixel information. According to the invention, the calculation amount of the processor is greatly reduced, the performance requirements of the mobile terminal are low, even if the configuration of the mobile terminal is not high enough, frame loss cannot occur basically, and the playing process is smooth. The invention relates to the field of three-dimensional technology.
Owner:MEIZU TECH CO LTD
Computer graphics using meshless finite elements for light transport
Owner:MENTAL IMAGES
Transmissive or reflective liquid crystal display and novel process for its manufacture
InactiveCN1877415AIncrease contrastEasy to operateOptical articlesThin material handlingThermoplasticLiquid-crystal display
The invention relates the modified transmission type or reflective-type liquid crystal projection display and preparing method, especially the modified contrast, switching property, reflectance factor and structure completeness LCD. The invention provides the compositions used to prepare LCD, which comprises thermoplastic plastics, thermosetting plastics, and comonomer or low-molecular polymer.
Owner:SIPIX IMAGING INC
Recording medium, recording and reproducing method and recording and reproducing device
InactiveCN1342973AReduced service lifeInformation arrangementAccessories for indicating/preventing prior/unwanted useRefractive indexTransmittance
Owner:SONY CORP
Apparatus for measuring film thickness formed on object, apparatus and method for measuring spectral reflectance of object, and apparatus and method of inspecting foreign material on object
InactiveCN1226590CSemiconductor/solid-state device testing/measurementPolarisation-affecting propertiesGratingEllipse
A film thickness measurement apparatus (1) comprises an ellipsometer (3) for acquiring a polarization state of a film on a substrate (9) and a light interference unit (4) for acquiring spectral intensity of the film on the substrate (9). In an optical system (45) of the light interference unit (4), a light shielding pattern (453a) is disposed in an aperture stop part (453), and an illumination light from a light source (41) is emitted to the substrate (9) through the optical system (45). A reflected light from the substrate (9) is guided to a light shielding pattern imaging part (43), where an image of the light shielding pattern (453a) is acquired. When the ellipsometer (3) performs a film thickness measurement, a tilt angle of the substrate (9) is obtained on the basis of the image of the light shielding pattern (453a) and a light receiving unit (32) acquires a polarization state of the reflected light. An calculation part (51) obtains a thickness of a film with high precision from the polarization state of the reflected light by using the obtained tilt angle.
Owner:DAINIPPON SCREEN MTG CO LTD
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