558 results about "Light scattering" patented technology

The invention relates to the related technical field of dust detection, and provides a mining induced charge and light scattering fusion dust detection device and method.The dust detection device comprises a workbench, a sampling assembly and a detection assembly, and the sampling assembly comprises a sampling air pump, a conical airflow homogenizer and a closed sampling cavity; the detection assembly comprises an annular sliding rail, a light scattering detection module and an electrostatic induction detection module; the dust detection method comprises the following steps: S1, device initialization and zero calibration; s2, sampling preparation of dust-containing airflow; s3, dual-module synchronous signal acquisition; s4, data processing and temperature and humidity compensation; s5, carrying out anti-interference protection assembly; and S6, data fusion and result output. S7, device cleaning and standby; through cooperative work of the double detection modules, dust detection signals in different concentration intervals are accurately captured, wide-range coverage from low concentration to high concentration is achieved, and synchronous monitoring of dust concentration and particle size characteristics is achieved.

The invention discloses a vector flow velocity measuring device and method based on a bidirectional scanning spectral domain optical coherence tomography technology. Comprising a super light-emitting diode light source, an optical fiber coupler, a polarization controller, an interferometer comprising a sample arm and a reference arm, and a collimating lens, the collimating lens, the grating, the focusing lens group and the linear array camera are sequentially connected through a light path; the linear array camera, the computer and the two-dimensional galvanometer are sequentially connected through a line; according to the method, the fixed bias vector velocity is introduced by utilizing the bidirectional scanning technology, the dynamic light scattering optical coherence tomography method and the Doppler optical coherence tomography method are combined, decoupling of each parameter of the vector flow velocity is efficiently and accurately realized, and a quantitative index is provided for vector flow velocity analysis. The vector flow velocity measuring device based on the bidirectional scanning spectral domain optical coherence tomography technology is simple in system setting and low in cost, the time resolution is improved by about 2.5 times, and the measuring time is shorter.

The invention relates to a respiratory dust concentration online monitoring device and method for a coal mine, and belongs to the technical field of respiratory dust concentration monitoring. The device comprises a virtual impact separation module, a light scattering detection module, a flow control module and a data processing module. The virtual impact separation module is used for separating respirable dust and non-respirable dust; the respirable dust enters the light scattering detection module, the respirable dust is irradiated by a laser beam which is incident in the direction perpendicular to the flowing direction of the respirable dust, a scattered light signal obtained after dust scattering is transmitted to the data processing module, and the concentration of the respirable dust is calculated in real time; the flow control module is used for controlling the rotating speed of the sucking pump in real time. Through multi-technology fusion and intelligent algorithm compensation, the accuracy and environmental adaptability of respiratory dust concentration measurement are improved, the problems that a traditional separation device is prone to blockage and needs frequent maintenance are solved, and long-term continuous separation monitoring of respiratory dust can be achieved.

The invention provides a method for analyzing femtosecond laser-induced damage behaviors on the surface of a Zn-doped KDP crystal, and belongs to the technical field of engineering optics based on computer data processing. The method comprises the following steps: firstly, respectively analyzing the influence of the Zn doping amount on the band gap and electroacoustic coupling of the KDP crystal through an ultraviolet-visible absorption spectrum and a Brillouin light scattering spectrum; then constructing a one-dimensional model, respectively simulating the electron density, lattice temperature and time evolution of electron temperature on the surface of the Zn-doped KDP crystal under femtosecond laser irradiation through an electron density accumulation rate equation and a double-temperature model, and theoretically analyzing the influence of the Zn doping amount on the damage behavior of the surface of the KDP crystal. And a theoretical model for calculating the femtosecond laser induced damage threshold is established, so that the optimal doping amount of Zn is determined in a lossless manner. A real sample is not contacted, so that the sample utilization rate is improved; the simulation process is more stable and controllable, and the data repeatability is high; and the research period can be shortened, and optimal doping amount screening is accelerated.

A touch sensing apparatus is disclosed comprising a panel that defines a touch surface, a plurality of emitters and detectors arranged along a perimeter of the light transmissive panel, and a light directing arrangement arranged adjacent the perimeter. The emitters are arranged to emit a respective beam of emitted light and the light directing arrangement is arranged to direct the light along a light path from the emitters to the touch surface. A diffusive light scattering element is arranged in the light path.

The invention relates to the technical field of adulteration detection methods, in particular to a fritillaria powder layered adulteration detection method based on hyperspectral imaging, which specifically comprises the following steps: step 1, sample preparation and hyperspectral data acquisition, specifically comprising sample preparation, hyperspectral image acquisition, black and white plate correction and spectrum extraction; step 2, spectral data preprocessing, specifically including noise suppression processing and baseline correction and feature enhancement; according to the method, sample preparation fits a real market adulterated scene, hyperspectral acquisition is combined with black and white plate correction and spectrum extraction, high-quality and interference-free original data is obtained, and pretreatment steps of noise suppression, baseline correction and feature enhancement are matched, so that interference such as equipment noise and light scattering is eliminated, and the sample essential spectrum difference is highlighted; and the problem of identification difficulty caused by poor data quality in traditional detection is solved.

The invention discloses high-precision metal slurry for photocuring forming and a green body preparation method, and belongs to the technical field of additive manufacturing. The metal slurry comprises, by mass, 80%-91% of metal powder, 4.8%-17% of photosensitive resin, 1%-3% of a dispersing agent and 0.05%-0.5% of a light screening agent. The metal powder is selected from stainless steel powder and the like, the photosensitive resin is selected from epoxy acrylic resin and the like, the dispersing agent is selected from AK1000 and the like, and the light screening agent is selected from benzotriazole and the like. The preparation method comprises the steps of magnetic stirring and mixing, metal powder adding in batches, homogeneous dispersion, printing parameter setting and the like. The light screening agent is used for inhibiting the light scattering'halo 'effect, the dispersing agent is used for promoting uniform dispersion of the powder, process optimization is combined, the slurry stability and green body uniformity are improved, the maximum forming precision reaches 70 microns, and the method is suitable for additive manufacturing of high-precision metal parts.

The invention relates to the technical field of intelligent control, and discloses an intelligent control system and method for a crystal glass laser internal engraving machine. The method comprises the following steps: acquiring three-dimensional point cloud data of a crystal glass workpiece, extracting a material basic feature vector, and inputting the material basic feature vector into an axial self-crossover attention module for three-dimensional space feature association to obtain a three-dimensional space state map; fusing the acoustic emission signal, the light scattering signal and the temperature signal based on the three-dimensional space state map to perform to-be-excited state discrimination, and determining a to-be-excited area; and adjusting the laser power, the pulse frequency and the focusing depth according to the to-be-excited region to obtain a laser parameter combination, and performing position trajectory and control input optimization on the plurality of laser heads to generate an execution instruction of each laser head. The laser power, the pulse frequency and the focusing depth can be adaptively adjusted according to the recognition result of the to-be-excited area, and then the machining precision and stability of the crystal glass laser internal engraving machine are improved.

The invention discloses a salt mist atmosphere concentration control method, device and system. The method comprises the following steps: setting a reference parameter corresponding to a target salt mist concentration; generating a salt mist atmosphere and collecting a real-time physical quantity of the salt mist atmosphere; calculating a real-time moisture absorption growth factor of the salt mist atmosphere particles according to the real-time moisture absorption factor, the real-time relative humidity and the real-time particle size distribution; calculating the real-time concentration of the salt mist atmosphere based on a mixed aerosol light scattering model in combination with a real-time extinction coefficient, a real-time scattering phase function and a real-time moisture absorption growth factor; and in response to deviation of the real-time concentration from the target salt mist concentration, generating and executing a regulation and control instruction based on a multi-physical-quantity coupling regulation and control model to regulate the generation rate and the humidity compensation amount of the salt mist atmosphere until the real-time concentration is stabilized in a preset range of the target salt mist concentration. Through a multi-physical-quantity coupling regulation and control mechanism, the problems of low precision and slow dynamic response in traditional salt mist concentration control are solved, and an accurate salt mist atmosphere control scheme is provided.

A touch sensing apparatus is disclosed, comprising a light transmissive panel that defines a touch surface, an opposite rear surface, and panel sides extending between the touch surface and rear surface. The panel sides define a perimeter of the light transmissive panel. The touch sensing apparatus comprises a plurality of light emitters and detectors arranged along the perimeter and adjacent the panel sides, a light guide arranged along the perimeter and having a first reflective surface comprising a diffusive light scattering element. The light emitters are arranged to emit a respective beam of light onto the diffusive light scattering element so as to generate propagating light that diffusively propagates above the touch surface, wherein the light detectors are arranged to receive detection light generated as said propagating light impinges on the diffusive light scattering element, and wherein the diffusive light scattering element is arranged at least partly outside the panel sides and extending at least partly above the touch surface.

DEPCT68 The welding method disclosed here includes a procedure for applying laser light for... Inspect the workpiece at an angle while varying the amount of light dispersion. The process of determining the correction value for the amount of light scattering based on intensity. Laser backlight for inspection and workpiece welding process. Laser light is applied to the workpiece so that the amount of light scattering is adjusted. The correction value is zero in the welding method as disclosed, laser light for inspection. It is scanned in a direction approaching the laser emission point for time-based monitoring. The amount of light scattering will be zero during the laser application process for... Inspect the workpiece. From the results, determine the welding method, welding system, and possible adjustments. Improvements to the accuracy of laser beam focusing control for welding were provided;

The utility model discloses a kind of device of supervising code scanning code upload, it is related to scanner technical field, and its technical solution main point is: including workbench, code scanner and host computer, workbench is equipped with horizontally arranged support, the through slot that code scanner is placed is opened in support, support is rotatably connected with protective cover near through slot notch, protective cover includes opening state and closing state, when protective cover is in opening state, protective cover and support are fixed by limiting component, when protective cover is in closing state, protective cover and code scanner are fixed by positioning component.The utility model is through being arranged protective cover and sponge block, effectively prevent the pollution of dust and oil stain to code scanner lens, reduce the problem of light scattering and decoding failure, to significantly improve the code scanning efficiency and reliability.

As semiconductor devices continue to shrink, particle detection systems require corresponding improvements in sensitivity and resolution. [Solution] The dark-field inspection system includes an illumination source for generating an illumination beam, an illumination optical component configured to direct the illumination beam towards the sample at an off-axis angle along the illumination direction, a collection optical component for collecting scattered light from the sample in response to the illumination beam in dark-field mode, a polarization rotor positioned on the pupil plane of the collection optical component, which provides a spatially variable polarization rotation angle selected to rotate the light scattered from the surface of the sample to a selected polarization angle, a polarizer aligned to block light polarized along the selected polarization angle in order to block the light scattered from the surface of the sample, and a detector that generates a dark-field image of the sample based on the scattered light from the sample that has passed through the polarizer.

The embodiment of the invention belongs to the technical field of refrigeration equipment, and provides a fresh keeping refrigerator and a control method thereof. The fresh-keeping refrigerator comprises a refrigerator body, a fresh-keeping box and a fresh-keeping box body, the shelf assembly is arranged in the refrigeration chamber in a sliding manner; the shelf assembly comprises: a shelf having light transmission; the light source is arranged at the end part of the shelf and is used for providing illumination for the shelf; the shelf further comprises a plurality of light scattering components which are arranged in the shelf, the arrangement density of the light scattering components in the shelf is in negative correlation with the distance between the light sources, and the light scattering components are used for scattering light emitted by the light sources to the surface of the shelf. According to the technical scheme, the layer frame emits light through the light scattering component, illumination is provided for fruits and vegetables placed on the layer frame, the problem of insufficient illumination caused by mutual shielding of the fruits and the vegetables can be effectively solved, and therefore the light fresh-keeping effect on the fruits and the vegetables is improved.

An apparatus (1) comprising an optical device (2) for monitoring bacterial growth of a dosed liquid biological sample. The apparatus is provided with a sample container port for receiving, in use, a sample container (6) having at least one detection chamber (20) for containing a dosed sample. The optical device (2) comprises a light source (22) configured to emit light along an incident beam axis which, in use, intersects at least one detection chamber (20) of the sample container (6) and illuminates a dosed sample contained in the detection chamber (20). The optical device (20) comprises a first photodetector (26) configured to receive light scattered by bacteria in the sample. The optical device (2) comprises a light collection arrangement (24) configured to collect light exiting the detection chamber (20) that has been positively scattered by bacteria in the sample at a scattering angle range of between about + / - 4 and + / - 20 degrees relative to the incident beam axis and direct the collected scattered light to the first photodetector (26); and prevent non-scattered light travelling parallel to the incident beam axis and exiting the detection chamber (20) from reaching the first photodetector (26). The optical device (2) comprises at least one processor configured to: measure an intensity of the scattered light received by the first photodetector (26); determine a respective representative quantity or concentration of bacteria in the sample from the intensity of the scattered light; repeat the measuring and determining steps at a series of predetermined intervals to determine changes in the representative quantity or concentration of bacteria in the sample over time; and determine a respective susceptibility of the bacteria in the sample to a respective drug.

A system may include a fiber optic cable buried under a surface and a smart sensor module coupled to the fiber optic cable. A controller may be coupled to the smart sensor module. The smart sensor module includes a light source coupled to an end of the fiber optic cable and a detector coupled to the end of the fiber optic cable. The controller may manage a transmission of a pulse of light from the light source to launch the pulse of light into the fiber optic cable. The detector may receive a backscatter generated from the pulse of light scattered off fiber molecules of the fiber optic cable. The smart sensor module may determine a temperature of the fiber optic cable based on an intensity of the generated backscatter. The controller may send an alert when the determined temperature is outside a predetermined threshold range from a base temperature.

The present application relates to the field of tunnel sunlight illumination control, in particular to an active sensing type intelligent sunlight illumination light scattering device and method for tunnel operation and maintenance, comprising a light guide reflective light scattering device and an intelligent sliding rail system arranged at the top of the light guide reflective light scattering device, the light guide reflective light scattering device comprises a light scattering support plate and a road surface brightness sensor; compared with the equidistant installation method of the traditional tunnel lighting system, according to the actual required illumination requirements of each section in the tunnel, the actual situation of the tunnel area and the actual design use of the tunnel, the position, angle and height of the light guide reflective light scattering device can be adjusted in real time and actively, so as to realize the accurate adjustment of the sunlight in the tunnel, make the light intensity uniformly distributed, ensure the uniformity and continuity of the lighting effect, enhance the comfort and improve the visibility, so that the driver can more accurately judge the road conditions under the uniform illumination, reduce the safety hidden danger in the tunnel, and provide a better driving environment for the driver.

The invention discloses a large-area scintillator and a preparation method thereof, and belongs to the technical field of large-area scintillator preparation. The method comprises the following steps: uniformly mixing Cs3Cu2I5 powder with a solvent capable of dissolving the Cs3Cu2I5 powder to form slurry, preparing a large-area scintillator film with controllable area and thickness through a blade coating method, enabling scintillator grains to undergo dissolution and recrystallization processes through a vacuum annealing process, and preparing the large-area scintillator film on the basis of Ostwald curing effect. The small crystal grains are adsorbed to the surface of the larger crystal grains to form larger crystal grains, and gaps among the crystal grains are filled; as the internal defects of the crystal grains are reduced, the light scattering is reduced, the light transmittance of the scintillator is improved, and finally, large-area high-resolution imaging is realized; according to the method, the light transmittance of the scintillator film is improved from 5% of a Cs3Cu2I5: 2Me scintillator film to 20% or above of a Cs3Cu2I5: DMSO scintillator film through regulation and control of a solvent, the high resolution of 16 lp mm <-1 >-18 lp mm <-1 > is kept, and an excellent imaging effect on a real object is achieved.

The invention provides an electronic device, which is characterized by comprising a first light-transmitting element and a second light-transmitting element, the second light-transmitting element is opposite to the first light-transmitting element; the switchable light regulation and control element is arranged between the first light-transmitting element and the second light-transmitting element; wherein a first cavity is arranged between the first light-transmitting element and the switchable light regulation and control element, a second cavity is arranged between the second light-transmitting element and the switchable light regulation and control element, and the switchable light regulation and control element comprises at least one of a light absorption switching element and a light scattering switching element.

The utility model relates to the technical field of lighting equipment, and discloses a lamp. The lamp comprises a light guide plate which comprises a front face, a back face and a side face serving as a light inlet face, and the light inlet face is provided with a convex arc-shaped area which is provided with a concave-convex structure; the lamp strip is matched with the light guide plate in shape and surrounds the light inlet surface of the light guide plate; a containing cavity is formed in the lamp holder, the light guide plate and the lamp strip are arranged in the containing cavity, the front face of the light guide plate faces the opening direction of the containing cavity, and the back face of the light guide plate faces the bottom face of the containing cavity. The arc-shaped area is provided with the concave-convex structure, the concave-convex structure can scatter light rays, the path of the light rays entering the light guide plate is changed, and therefore light ray focusing is avoided. The direction and distribution of the light are adjusted through the concave-convex structure, it is ensured that the light can be evenly spread in the light guide plate, formation of local bright spots and virtual images is remarkably reduced, and the overall lighting uniformity and the visual comfort degree are improved.

This application provides a machine vision-based intelligent detection method for surface defects in protective films, comprising: extracting stress concentration areas and touch signal attenuation features from potential risks of touch response delay; performing group analysis on the stress concentration areas and touch signal attenuation features to obtain a joint attenuation trend of optical transmittance and touch signal attenuation; identifying the deformation degree of stress concentration areas and determining the touch signal attenuation degree of folding areas based on the joint attenuation trend of optical transmittance and touch signal attenuation to assess the durability of the folding screen; extracting early warning indicators for screen curvature radius and light scattering intensity defects from the attenuation trend prediction results, and generating a complete report including optical transmittance and touch signal attenuation defects.

The utility model provides a kind of instrument display structure and electric vehicle, it is related to traffic vehicle technical field, the utility model provides instrument display structure including instrument cover shell, light filter and light source component, light filter and light source component are installed in instrument cover shell;Instrument cover shell has display area, light filter is located between display area and light source component, and one side of light filter is connected with light source component, and other side is bonded with the inner wall of display area.The utility model provides instrument display structure can optimize light transmission effect, effectively alleviate the problem that traditional instrument is caused by light scattering and leads to display blur, uneven brightness, significantly enhance the definition of text and image.

The application discloses a deep ultraviolet light emitting diode with light scattering structure and a preparation method thereof. The light emitting diode comprises, in sequence along a wafer epitaxial growth direction, a substrate layer, a buffer layer and an N-type semiconductor transmission layer; wherein the N-type semiconductor transmission layer has an upper and lower part in shape, a multi-quantum well active layer, a P-type semiconductor transmission layer and a P-GaN contact layer are sequentially arranged on the surface of the upper part of the N-type semiconductor transmission layer; and a horizontal direction light scattering structure layer and a vertical direction light scattering structure are respectively arranged in the inner part of the upper and lower parts of the N-type semiconductor transmission layer. The application improves the scattering effect of light in the N-type semiconductor transmission layer, breaks the light waveguide effect of the N-type semiconductor transmission layer, effectively blocks the light propagation to the metal n electrode, simultaneously scatters the light, improves the bottom light extraction efficiency of the deep ultraviolet LED and improves the light extraction efficiency.

This invention provides a directly coupled stacked structure for improved image quality in optical devices. [Solution] Optical surfaces are planarized and plasma activated to laminate them together, and then a direct bond is formed between the two surfaces without adhesive or an adhesive layer. This process provides an improved optical element with higher image brightness, lower light scattering, better resolution, and higher image fidelity. Direct bonding also provides a heat-resistant interface that can withstand much higher temperatures than conventional optical adhesives. Exemplary processes can be used to manufacture many types of improved optical components such as improved laminated lenses, mirrors, beam splitters, collimators, prism systems, optical conduits, and specular waveguides for smart glasses and head-up displays (HUDs), which provide better image quality and elimination of dark lines of sight that are apparent to the human observer when conventional adhesives are used in conventional lamination.

The present prevention provides a surface coating for cooling a surface by light scattering comprising a plurality of successive layers, each of the layers may be comprised of a plurality of spheres arranged to form a structure comprised of packed spheres. Each layer may have a different arrangement of packed spheres to create to a different light scattering property in each of the layers. The coating of the structures may also be formed by randomly packed spheres and the spheres may have a uniform diameter.

Provided herein are methods of detecting unlabeled biomolecules. In some embodiments, the methods include disrupting a cell population sufficient to release unlabeled biomolecules from the cell population to produce released biomolecules in which the cell population is disposed on a first inner surface of a chamber that is disposed substantially within a fluidic device and in which the chamber comprises a fluidic material. In some embodiments, the methods also include binding the released biomolecules to a second inner surface of the chamber to produce surface-bound biomolecules, introducing an incident light toward the second inner surface of the chamber concurrent with, and / or after, producing the surface-bound biomolecules, and detecting light scattered by the surface-bound biomolecules over a duration to produce a set of biomolecule imaging data. Related fluidic devices, systems, and computer readable media are also provided.

The utility model relates to a kind of light-transmitting panel structure, belong to panel field, light-transmitting panel structure includes: PCB board component;Lamp body component, lamp body component is set on PCB board component;Light shielding component, light shielding component is set on PCB board component, light shielding component surrounds lamp body component and is set, light shielding component is equipped with light transmission channel, the end of light shielding component away from PCB board component is equipped with opening, opening is communicated with light transmission channel;Panel component, panel component is set on light shielding component, panel component closes opening, panel component is equipped with hollow area, hollow area is in character or pattern, the part of panel component and is equipped with hollow area is made of light-transmitting material.This application discloses light-transmitting panel structure by light shielding component surrounds lamp body component and is set, light shielding component is equipped with light transmission channel, can avoid light scattering to all around, ensure that light-transmitting character or pattern display is clear and bright.

The invention belongs to the technical field of trace detection and intelligent early warning, and particularly discloses an intelligent sensing fire early warning system based on pyrolysis particulate matter detection. The system comprises a multi-angle polarized light scattering spectrum acquisition device, a physical information neural network inference engine, an airflow interference filtering unit, a pyrolysis dynamics constraint embedding module and a fire trend early warning output unit. A pyrolysis dynamic rule in an Arrhenius equation form is used as a physical constraint to be embedded into a neural network loss function, air flow disturbance is filtered out by combining topological data analysis and computational fluid mechanics, and a pyrolysis reaction stage and a fire behavior increasing trend are reversely deduced by using a multi-angle polarization scattering spectrum. And graded early warning is realized before the particulate matter concentration does not reach a traditional threshold value. According to the technical scheme, the accuracy, the robustness and the response lead of early fire recognition are improved.