29 results about "Reflectance properties" patented technology

The invention discloses an urban green land vegetation extraction method based on an unmanned aerial vehicle multispectral remote sensing image. Comprising the following steps: 1) determining an image acquisition area, and performing unmanned aerial vehicle path planning; 2) performing data acquisition through an unmanned aerial vehicle to obtain a high-resolution multispectral image; (3) splicing the acquired images through measurement software Pix4D mapper 4.4 to generate a digital orthoimage; and 4) combining the orthoimages of the spectral bands by using ENVI 6.0 software to obtain images of five bands including blue, green, red, red edge and near-infrared. According to the method, a background area which does not meet the vegetation spectral reflectivity characteristic is effectively inhibited, and the abnormal phenomenon that the reflectivity of a red-edge wave band is lower than that of a red wave band or higher than that of a near-infrared wave band is also solved, so that noise interference is effectively reduced; meanwhile, no obvious intersection phenomenon exists between the gray statistical characteristic values of the vegetation and the non-vegetation characteristics, and the accuracy of green land vegetation collection is improved.

The invention relates to the technical field of carbon detection, in particular to an online real-time dynamic detection method for the carbon content of converter steelmaking molten steel, which comprises the following steps: acquiring multi-source sensing data, and acquiring a molten steel surface temperature image acquired by a thermal infrared imager; acquiring multiband spectral data, namely controlling a visible band sensor to acquire radiation intensity in a range of 500-600nm, and controlling a near-infrared band sensor to acquire reflectivity characteristics in a range of 850-1100nm; analyzing and fusing the data, analyzing the temperature image, and generating a molten pool two-dimensional temperature field; analyzing the multiband spectral data, and extracting a spectral feature vector related to the carbon content; fusing the two-dimensional temperature field and the spectral feature vector, and generating a molten steel surface carbon content distribution diagram based on a pre-trained carbon content machine learning model; and outputting an optimized detection result, processing multi-node data through a distributed computing framework, and outputting a dynamic carbon content detection report. According to the invention, the effects of breaking through the limitation of traditional static detection, real-time component monitoring, full molten pool covering and dynamic feedback are achieved.

An infrared-spectroscopy-based method for monitoring temperature-induced deformation of a component of an intelligent moxibustion robot. The method comprises: collecting an infrared spectrum and a frequency spectrum of each detection position on a target component of a moxibustion robot; on the basis of frequency differences between peaks and troughs in the frequency spectrum, constructing a motion influence confidence factor of each detection position; using a box-counting method to acquire a scale relationship graph of the infrared spectrum of each detection position; on the basis of scale relationship graphs of all the detection positions, determining an overall absorbance difference index of the target component; on the basis of the overall absorbance difference index and the motion influence confidence factor, using a local outlier factor (LOF) outlier detection algorithm to calculate an LOF of each detection position in a thermal data sequence; and on the basis of a thermal alarm threshold value, determining a temperature-induced deformation risk of the target component. The method can eliminate spectral difference variations caused by shadows and reflectance properties, thereby improving the precision of determining high-temperature deformation of components.

[Problem] To provide a polishing end point detection device and method, and a CMP device capable of accurately detecting a polishing end point when polishing a workpiece having a thin film thickness. [Solution] A polishing end point detection device (70) is provided with: a measurement unit (71) that, during polishing of a workpiece (W), radiates measurement light onto the workpiece (W), disperses reflected light from the workpiece (W), and acquires a spectral waveform indicating the relationship between the wavelength and reflectance of the reflected light; the reflectivity is the ratio of the intensity of the reflected light to the reference intensity of each wavelength component obtained in advance; and a detection unit (72) that calculates the film thickness of the thermal oxide film by applying Fourier analysis to the spectral waveform. The reference intensity is calculated by bringing a sample workpiece having substantially the same reflectance characteristic as a substrate of a workpiece (W) into contact with a polishing pad (5) in a state where a CMP slurry is interposed between the polishing pad (5) and the sample workpiece, and irradiating the sample workpiece with measurement light through an observation window (80) of the polishing pad (5) by a measurement unit (71). And the reflected light from the sample workpiece is split.

Systems and methods for generating and using statistical models to mitigate atmospheric effects in images are described. In some embodiments, a statistical model may be generated by selecting a vegetation type that grows in continuous healthy canopies; identifying a vegetation reference value that is a stable reflectance property of the vegetation type; in a plurality of images, selecting one or more plots of the vegetation type and obtaining top-of-atmosphere reflectance for the plots; selecting discrete areas near the plots and obtaining top-of-atmosphere reflectance for the discrete areas; obtaining image statistics for the discrete areas; and generating a statistical model based on the acquired data.

To provide a transparent display device having a high light transmittance and capable of improving reflection characteristics.SOLUTION: A transparent display device according to one or more embodiments of this specification may include a substrate including a non-transmissive area having a light-emitting area in which a light-emitting element is arranged and a transmissive area, at least one gate line crossing the non-transmissive area and the transmissive area on the substrate, and a gate bridge pattern arranged in the transmissive area on the substrate and at least partially overlapping at least one gate line.SELECTED DRAWING: Figure 1

In one embodiment, the light control member and a display device including the same include a light control layer including a base region and a light conversion region in which a plurality of light converters are arranged in an aggregated manner, and each of the light converters includes quantum dots and liquid crystal ligands bonded to the surfaces of the quantum dots, thereby exhibiting excellent light extraction efficiency and low reflection characteristics.

The utility model provides a structure that can improve vehicle camera flare problem relates to optical camera technical field, the edge of PCBA board is provided with the recessed support on upside, the middle of recessed support is provided with the light transmission CG board, the upside of recessed support is provided with camera light control adjustment subassembly, the upside of recessed support is welded with the stepped light shield outer cover, the upside of stepped light shield outer cover is welded with light guide lens barrel, the stepped light shield outer cover passes through three stages and gradually contracts structure, effectively blocks the direct incidence path of external stray light, avoids the multiple reflection of light in the internal cavity, and the matte coating of stepped light shield outer cover and recessed support inner wall can effectively absorb residual stray light, reduces internal reflection intensity, and black matte nanometer composite material has high light absorption rate and low reflectivity characteristics, further restrains light scattering, thereby cooperates recessed structure and ladder light shield design, improves the anti flare ability comprehensively, ensures the clear and stable imaging.

The invention provides a low-scattering conductive adhesive film, a non-developable curved surface structure conductive layer and a preparation method and application thereof.The low-scattering conductive adhesive film comprises an insulating resin matrix and conductive particles, the conductive particles with the volume fraction lower than 10% are dispersed in the insulating resin matrix, and the nominal diameter D of the conductive particles is larger than the nominal thickness T of the adhesive film before curing, d ranges from 15 micrometers to 350 micrometers, T ranges from 10 micrometers to 300 micrometers, D is kept to be larger than or equal to T, and D / T ranges from 1.1 to 2.0. The low-scattering conductive adhesive film provided by the invention has excellent low reflectivity, can realize reliable Z-direction conductive connection, and has good process and structure compatibility.

A device may include a light source configured to emit light associated with a first light spectrum and a display configured to reflect the light, as reflected light associated with a first reflected light spectrum, to visually present digital content in a color associated with a second light spectrum. The device may include circuitry configured to determine whether the first light spectrum differs from the second light spectrum. The circuitry may be configured to modify, based on reflectance properties of the display and based on the first light spectrum differing from the second light spectrum, the first reflected light spectrum to create a modified reflected light spectrum representative of the color. The circuitry may be configured to cause the display to render, based on the modified reflected light spectrum, the digital content in the color that is associated with the second light spectrum.

A light detection and ranging (LIDAR) system for a vehicle includes one or more emitters configured to transmit light signals to an environment in which the vehicle is located; one or more detectors configured to receive return signals corresponding to the light signals being reflected back from an object in the environment; and one or more processors configured to: determine a reflectivity characteristic of the object based on reflectivity values associated with the object which are determined based on the return signals; and provide information relating to the reflectivity characteristic of the object to an autonomous vehicle control system.

A head-up display (HUD) system of a vehicle includes a vehicle windshield including a coating coated thereon, and an HUD projector adapted to project an image onto an interior surface of the vehicle windshield wherein the coating coated on the windshield provides different reflectivity characteristics for different color components of the projected image, the HUD projector is adapted to individually calibrate the polarization of each of the different color components of the projected image to maintain consistent brightness and intensity characteristics within the image reflected from the windshield interior surface.

The application discloses a material reflection characteristic detection method and device, a storage medium and an electronic device. The material reflection characteristic detection method comprises the following steps: controlling a target light beam to irradiate a material surface of a material to be measured in a target incident angle; acquiring a reflection light spot formed by a reflection light beam of the target light beam on a reflection path of the target light beam; controlling a power meter with a single slit on the surface to scan the reflection light spot in a target direction to obtain a power data set; and determining a target material reflection characteristic of the material surface in the target incident angle according to the power data set and beam information of the target light beam, wherein the target material reflection characteristic comprises a target reflectivity characteristic and a target power distribution characteristic, and the target power distribution characteristic is used for indicating a power distribution condition on the reflection light spot. By adopting the technical solution, the problem of low detection efficiency of material reflection characteristics in the related art is solved.

A virtual image display apparatus includes an image light emitting unit configured to emit image light, and a see-through mirror which is an optical member having a reflective film that reflects the image light, wherein the see-through mirror includes a first region on which a light ray of the image light corresponding to a center angle of view is incident and a second region on which a light ray of the image light which different from the light ray corresponding to the center angle of view is incident, a film thickness in the first region of the reflective film is thicker than a film thickness in the second region, and the first region of the reflective film has reflectivity characteristics corresponding to a wavelength band which is wider toward the long wavelength side than a wavelength band of the image light emitted from the image light emitting unit.

A head up display (HUD) system for a vehicle includes a vehicle windshield including a coating applied thereto, and a HUD projector adapted to project an image onto an inner surface of the windshield of the vehicle, wherein, the coating applied to the windshield provides different reflectivity characteristics for different color components of the projected image, and the HUD projector is adapted to individually calibrate a polarization of each of the different color components of the projected image to maintain consistent brightness and intensity characteristics within the image reflected from the inner surface of the windshield.

The present disclosure relates to a dynamic integration time controller for time-of-flight ranging systems. According to embodiments, a system can dynamically control the integration time in a time-of-flight (ToF) device based on the current operating state. A signal scaler processes calibration data and real-time measurements to determine the desired signal and ambient rate. Parallel calculations determine the desired integration time, one based on achieving maximum ranging distance and the other based on the measurement accuracy requirements. The system selects the longer integration time and applies user-defined bounds to optimize power consumption while maintaining specified performance. By adapting the integration time to ambient light conditions and target reflectivity characteristics, the system is able to shorten the integration time in favorable conditions while automatically increasing the duration when needed for long distances or low reflectivity targets.

A damaged portion of a vehicle windshield in an area near a transparent display (TD) of a head up display (HUD) may be treated with a resin. The treated portion may introduce brightness artifacts into an image projected onto the TD. To compensate images projected onto the TD for the brightness artifacts, first pixel intensity adjustment values are received via a touchscreen. Pixels of a reference image are adjusted in accordance with the first pixel intensity adjustment values to provide a reference compensated image which, when projected by a projector of the head up display (HUD) system onto the TD, counters effects of spatially varying reflectance properties of treated portion of the windshield which would otherwise appear were the reference image displayed on the TD without compensation.

In a method for displaying a virtual object (140), a scene (100) is imaged. The scene includes a target device (120). The target device includes a set of color target elements (121) having known reflectance properties and at least one illumination target element (122) having a plurality of known surface normals. At least one image of the scene is processed to determine measured colors of the color target elements and illumination and viewing conditions of the scene. Color transform parameters are computed by comparing the measured colors of the color target elements to the known reflectance properties. The virtual object is rendered for the determined illumination and viewing conditions. The rendered virtual object is aligned with the scene. A color transform is applied to the imaged scene and / or to the virtual object, and a superposition of the rendered virtual object and the imaged scene is displayed in real time on a display device (220) as illumination and / or viewing conditions change.

The invention discloses a machine learning-based wheat above-ground biomass unmanned aerial vehicle remote sensing monitoring method, which relates to the field of intelligent agriculture, and comprises the following steps: obtaining a color index related to wheat above-ground biomass AGB by using a multispectral image and a visible light image obtained by an unmanned aerial vehicle remote sensing technology; constructing a multi-source vegetation index data set by combining the reflectivity characteristics of the multi-spectral wave bands to form a first data set; and adopting a machine learning algorithm to construct a model according to the first data set for monitoring the wheat AGB. According to the invention, a machine learning framework fusing the multi-spectral data of the unmanned aerial vehicle and the agricultural parameters is provided for estimating the AGB in the key growth period, the multi-source data fusion effect is highlighted, and technical support is provided for precision agriculture.

The present disclosure aims to provide a silica heat reflector and a manufacturing method thereof that can withstand use up to 1000°C, maintains better adhesion between the silica plate and the reflector than conventional ones, suppresses deterioration of the metal components of the reflector, has good heat reflection properties, has good bonding between the silica plates, and has a long life. The silica heat reflector according to the present disclosure is a silica heat reflector in which the reflector 3 reflects infrared rays L1 incident from the first silica plate side or infrared rays L2 incident from the second silica plate side, the first silica plate 1 and the second silica plate 2 have an OH group content of 1000 ppm or less, the reflector 3 is a thin film, and the surface layer including at least the reflection surface of the reflector is made of one selected from the group consisting of Ir, Pt, Rh, Ru, Re, and Mo, or is made of an alloy containing at least one selected from the group consisting of Ir, Pt, Rh, Ru, Re, and Mo and having a melting point of 1200°C or higher.

The invention discloses a preparation method of a high-emission radiation refrigeration film, which comprises the following steps: mixing a transparent resin matrix, a diluting monomer, an ultraviolet light absorber and a near-infrared reflecting agent in proportion, and carrying out ultrasonic dispersion to obtain premixed slurry; then adding a surface additive and a photoinitiator, and uniformly stirring to obtain a coating liquid; the coating liquid is coated on the surface of a transparent polymer base material, and is cured by ultraviolet light with the wavelength of 365 nm to obtain the radiation refrigeration film. The infrared emissivity of the prepared film is not lower than 0.94 in the 8-13 [mu] m atmosphere window wave band, the visible light transmittance is high, meanwhile, the excellent ultraviolet blocking and near-infrared reflection performance is achieved, and the passive cooling effect of 5.6-9.8 DEG C can be achieved. The method is simple in process, rapid in curing, suitable for continuous production and suitable for light-transmitting occasions needing efficient heat dissipation such as buildings and traffic.

Systems and methods for generating and using statistical models to mitigate atmospheric effects in images are described. In some embodiments, a statistical model may be generated by selecting a vegetation type that grows in continuous healthy canopies; identifying a vegetation reference value that is a stable reflectance property of the vegetation type; in a plurality of images, selecting one or more plots of the vegetation type and obtaining top-of-atmosphere reflectance for the plots; selecting discrete areas near the plots and obtaining top-of-atmosphere reflectance for the discrete areas; obtaining image statistics for the discrete areas; and generating a statistical model based on the acquired data.

This composite structure (1) is a structure in which an illumination device (3) and a wireless communication device (17) have been integrated and composited. A light transmitting member (7) is placed on the opening side of a micro-foamed resin sheet (15) having a depression-like recessed shape. A light guiding space (19) is formed between the molded micro-foamed resin sheet (15) and the light transmitting member (7). An LED light source (13) is placed on a substrate (11). A wireless communication device (17) is placed on the back surface side of the micro-foamed resin sheet (15), which is the side opposite to the light guiding space (19). In the composite structure (1), the micro-foamed resin sheet (15) placed in front of the wireless communication device (17) functions as a portion of a housing of the illumination device (3), and is placed so as to contact a radio wave-emitting surface of the wireless communication device (17). As a result, it is possible to obtain a composite structure of an illumination device and a wireless communication device that not only excels in light diffuse reflectance properties and low radio wave transmission loss, but also excels in radio wave scattering loss.

A polarizing plate having excellent optical properties includes: a transparent substrate that is transparent to light in a used wavelength band; grid-shaped protrusions arranged on the transparent substrate at a pitch shorter than the wavelength of light in the used band, extending in a predetermined direction, and has a reflective layer and a reflection control layer; and a groove which is recessed between the grid-shaped protrusions and whose width in a direction orthogonal to the predetermined direction is reduced to zero in the depth direction. This improves transmittance and reflectance properties, thereby achieving excellent optical properties.

Methods and apparatus for an assembly having a first wafer including bulk material and a layer having microelectronics and a wafer with a deposited thin film which is bonded to the first wafer such that the reflected film is embedded within the composed assembly. The reflector wafer can include a handle wafer and a thin film having reflectance characteristics to prevent imaging of the microelectronics via light through the bulk material.

To provide a coating composition for forming a coating film and coating film that can improve the detection accuracy of location information in tunnels for LiDAR sensors by forming a coating film with diffuse reflectance properties as a coating film used to protect the surface of tunnel structures for autonomous vehicles equipped with LiDAR sensors that travel through tunnels.SOLUTION: A coating for forming a coating film of the invention that is easily detectable by a LiDAR sensor formed on the inner wall of a tunnel is composed of: a primer coating for forming a coating film that contains near-infrared reflective pigments in a resin component serving as a binding agent; and a top coating for forming a coating film that contains light-diffusing fine particles formed from polymerizable monomers in a silicone resin serving as a binding agent.SELECTED DRAWING: Figure 1

Imaging lens (10) comprising the following: a plurality of lens elements (12, 13, 14) arranged sequentially along a beam path from an object side to an image side, wherein a central axis (AL) of the imaging objective (10) passes through a center of each of the plurality of lens elements (12, 13, 14), the plurality of lens elements (12, 13, 14) includes a center-shielding lens element (12), and the center-shielding lens element (12) comprises: a first optical surface (121), wherein the central axis (AL) passes through the first optical surface (121); and a second optical surface (122) which is arranged opposite the first optical surface (121); the second optical surface (122) comprises: a center-shielding area (RG1), wherein the central axis (AL) passes through the center-shielding area (RG1) and the center-shielding area (RG1) comprises a light-shielding layer (L1); and an optical transmission area (RG2) that is adjacent to and surrounds the center-shielding area (RG1); wherein an inner side (S1) and an outer side (S2) of the center-shielding area (RG1) both have properties of low reflectivity.

The invention provides an injection molded light guide member and a head mounted display having the same. Provided is an injection-molded light guide member capable of providing a high-resolution image without image distortion, while suppressing undesirable situations such as uneven brightness, uneven color, and rainbow patterns, even when a partial mirror having a reflectance characteristic with polarization selectivity is disposed in an input coupler, a waveguide unit, and an output coupler. This injection-molded light guide member is provided with: a base material part; an input coupler that enters light from the image display device into the light guide member; light guide parts on two opposite surfaces for guiding the incident light by a plurality of repeated reflections; and an output coupler that extracts light from the light guide body while causing the guided light to face an eye of an observer by means of refraction, diffraction, and reflection functions, the absolute value of the photoelastic coefficient being 10 * 10-12 Pa-1 or less, and a partially reflecting mirror that transmits a portion of the light and reflects the remaining light being formed on at least one of the three surfaces of the waveguide section and the output coupler.

In a method for displaying a virtual object (140), a scene (100) is imaged. The scene comprises a target apparatus (120). The target apparatus comprises a set of color target elements (121) having known reflectance properties and at least one illumination target element (122) having a plurality of known surface normals. At least one image of the scene is processed to determine measured colors for the color target elements and illumination and viewing conditions for the scene. Color transformation parameters are calculated by comparing the measured colors and the known reflectance properties of the color target elements. The virtual object is rendered for the determined illumination and viewing conditions. The rendered virtual object is aligned with the scene. A color transformation is applied to the imaged scene and / or to the virtual object, and an overlay of the rendered virtual object with the imaged scene is displayed on a display device (220) in real time while the illumination and / or viewing conditions are changed.