92 results about "Absorption (electromagnetic radiation)" patented technology

The invention is an apparatus for amplifying cooling through interaction with electromagnetic radiation for optical of objects and / or object surfaces with essentially three layers, which are a bottom layer that is comprised of a single or multi layered material configured to emit IR radiation; a middle layer that is comprised of a single or multi layered material configured to respond in anti-Stokes fluorescence upon absorption of electromagnetic radiation; and a top layer that is comprised of a single or multi layered material configured to reflect selected spectral band(s) and / or amplify selected spectral band(s) of the electromagnetic radiation transmittable to the middle layer.

The invention discloses an electromagnetic shielding method for a high-density integrated wireless audio module, and the method comprises the steps: employing a metal material with good conductivity and corrosion resistance, such as aluminum alloy and copper alloy, to cover the outer surface of the module, and enabling the outer metal shielding layer to be used for isolating external electromagnetic interference; the thickness of the outer metal shielding layer is generally 0.3 mm to 1 mm, it is ensured that external electromagnetic radiation can be effectively reflected or absorbed, and the outer metal shielding layer is located between the outer metal shielding layer and the inner conductive coating and is made of a material with high-frequency absorption performance, such as a ferrite material, a conductive polymer or a carbon-based material. The thickness of the wave-absorbing layer can be designed according to the electromagnetic characteristics of a working frequency band and is generally 0.5 mm to 2 mm, so that high-frequency noise can be effectively attenuated. By adopting a multi-layer shielding structure and an intelligent heat dissipation design, electromagnetic interference is effectively reduced, miniaturization and light weight of the wireless audio module are maintained, and compared with the prior art in which a large number of expensive shielding materials are needed, the wireless audio module has the advantages that the selection of the shielding materials and the intelligent heat dissipation design are optimized.

The invention discloses a preparation method of a Fe3O4 modified phosphorus-doped carbon-based porous wave-absorbing material constructed on the basis of a multi-component strategy. The preparation method comprises the following steps: firstly, preparing a phosphorus-doped carbon-based porous nano material through a freeze-drying method and a sacrificial template method, then obtaining a Fe3O4 intermediate through oil bath, and finally reducing for 6 hours in an Ar atmosphere to obtain the Fe3O4-modified phosphorus-doped carbon-based porous wave-absorbing material, namely Fe3O4 (at) P-NCP. Based on a good magnetic loss mechanism of the material, a synergistic effect of dielectric loss and magnetic loss is provided for electromagnetic wave absorption. And meanwhile, the porous structure ensures that incident electromagnetic waves can form multiple reflections in the porous structure. The material has the advantages of good microwave absorption performance, thin matching thickness, wide effective absorption frequency band and the like. A good foundation is provided for development of porous materials, and a good design thought is provided for preparation of electromagnetic wave absorbing materials. The good microwave absorption performance of the material can play a good role in electromagnetic radiation and pollution, and the material has a wide application prospect.

The invention belongs to the technical field of hydrophobic electromagnetic shielding materials, and particularly relates to an asymmetric electromagnetic shielding composite film and a preparation method and application thereof. The PNTs are polypyrrole nanotubes, after Na2MoO4. 2H2O and CH4N2S are added and subjected to a high-temperature reaction, a MoS2 flower-shaped shell structure can grow on the PNTs, the layered structure and the high specific surface area of MoS2 contribute to enhancing scattering and absorption of electromagnetic waves, and rich defect sites can induce dielectric polarization to achieve dielectric loss. Introducing the PNTs (at) MoS2 core-shell nanowire as an electromagnetic wave absorbent into a polylactic acid / dichloromethane system, then putting the system into a culture container in which a conductive filler is pre-paved, and standing and volatilizing at room temperature by adopting an ethanol solution as a volatile agent to finally obtain a three-layer asymmetric electromagnetic shielding composite film comprising the conductive filler, the PNTs (at) MoS2 structure and a polylactic acid matrix from bottom to top. And an asymmetric conductive gradient network is constructed, and the EMI shielding performance which mainly focuses on absorption is remarkably improved, so that the secondary radiation problem of electromagnetic waves is reduced.

The invention relates to a device for wavelength conversion of electromagnetic radiation, in particular light, UV and / or infrared radiation, comprising at least one conversion layer comprising a wavelength-converting material and at least one wavelength-selective optical component. The device is characterized in that the wavelength-selective optical component is adapted to the absorption spectrum of at least one semiconductor. The invention also relates to a solar cell comprising the aforementioned device.

A scanning probe microscope and microscope operating method utilizes at least one material having a dielectric constant (ε) and a resonant sensor material between a metal probe tip and a sample surface. When electromagnetic radiation from a light source is transmitted to the junction between the metal probe tip and the sample, absorption of the electromagnetic radiation by the resonant sensor material, which depends on the dielectric constant of the at least one material of the sample, is detected.

A system for heat conditioning an area of Earth includes an Earth-orbiting satellite. The satellite includes a power supply, a precursor gas supply, and one or more double helicon plasma beam generators coupled to the power supply and the gas supply and configured to generate a plasma and further configured with a magnetic nozzle to maintain a shape of the beam; therefore, the top surface area of the beam is maximized. The generated plasma provides enhanced electromagnetic waves absorption, reflection, and deflection of incoming solar light and electromagnetic radiation, thereby reducing the heat striking the area of the Earth.

An apparatus comprising a compact folded path cell for optical gas detection and / or measurement utilizing gas absorption spectroscopy. The apparatus includes an electromagnetic radiation source, a gas sample cell housing a reflector, and a detector for electromagnetic radiation. The source and detector are positioned between the reflector elements in a configuration that reflects the radiation away from the source and detector until the reflected radiation has a suitable optical path length, and then reflects the radiation towards the detector. Using spectroscopic analysis, the presence of at least one gas species in a gas sample can be determined and / or at least one parameter can be measured.

A calibration method includes receiving data characterizing a first pressure broadening coefficient, a second pressure broadening coefficient and a third pressure broadening coefficient of the target gas absorption associated with a first background gas, a second background gas and a third background gas, respectively. The method further includes, determining a molar ratio associated with the second background gas and the third background such that an effective pressure broadening coefficient associated with a target gas mixture including the second background gas and the third background gas mixed at the determined molar ratio is within a predetermined threshold of the first broadening coefficient. The target gas mixture further includes a target gas. The method also includes calibrating a gas analyzer using the target gas mixture to replace the calibration of the target in the first background gas. The calibration is based on absorption of electromagnetic radiation by the target gas in the target gas mixture.

An article includes a substrate with a surface, a coating disposed over the surface, and a subtractive colorant which absorbs electromagnetic radiation according to a specified absorption spectrum. The coating includes a binder material and a plurality of porous polymer particles having pores with a distribution of pore sizes adapted to scatter electromagnetic radiation in one or more specified wavelength bands, wherein the porous polymer particles have a shell which is impermeable to a liquid.

A bolometer may include a sensitive layer configured to provide two distinct electrical impedance states at a temperature above 200K. Electrical impedance state 1 and electrical impedance state 2 may be separated by an energy barrier that is between 5% and 3000% of the average thermal energy in the sensitive layer. Incident infrared electromagnetic radiation is converted into heat, resulting in a change in the sensitive layer from electrical impedance state 1 to electrical impedance state 2. The continued absorption of incident electromagnetic radiation may cause a discrete series of changes in the bolometer response from electrical impedance state 1 to electrical impedance state 2.

The invention relates to the field of electromagnetic shielding, and discloses a preparation method of flexible light-weight flame-retardant electromagnetic shielding cloth which comprises a base layer, electromagnetic shielding cloth and a flame-retardant layer. The base layer is made of a macromolecule flexible fiber material to provide flexibility and mechanical strength. According to the electromagnetic shielding cloth, a chemical plating and electroplating method is adopted, metal ions are reduced into atoms or molecules, the atoms or the molecules are deposited to form a metal film on the surface of the fabric, and the obtained electromagnetic radiation composite fabric not only has an excellent electromagnetic shielding effect, but also has good conductivity. And the flame-retardant layer is composed of a flame retardant and resin, so that the flame-retardant property is improved. The preparation method comprises the steps of preparation of the base layer, preparation of the electromagnetic shielding cloth and composite preparation of the flame-retardant layer. The invention relates to a preparation method of flexible light-weight flame-retardant electromagnetic shielding cloth, which comprises the following steps: designing and developing a functional integrated metal coating-based composite fabric through a composite hierarchical structure, exploring a reflection and absorption mechanism of electromagnetic waves on the functional composite fabric, and optimizing micro-structure parameters and designing flame retardance to obtain the flexible light-weight flame-retardant electromagnetic shielding cloth. And the electromagnetic radiation shielding composite fabric with full-segmentation electromagnetic shielding property and flame retardance is developed.

A layered, highly absorptive electromagnetic shielding composite material and its preparation method involve selectively etching the Al layer of Ti3AlC2 to obtain an MX solution. Fe3O4 and MX are then assembled into a composite material, FM. Melamine foam is then carbonized to obtain a carbonized foam, CF. FM is then assembled onto a CF skeleton via an impregnation method to form a composite foam, FM@CF. Finally, MX is deposited on the bottom of FM@CF via vacuum filtration to form the layered, highly absorptive electromagnetic shielding composite material, FM@CF / MX. The preparation process is simple and easy to operate. The layered structure achieves a "low reflection-high absorption-high reflection-reabsorption" strategy for electromagnetic waves, successfully achieving a combination of high electromagnetic absorption and high electromagnetic shielding efficiency, significantly reducing secondary electromagnetic contamination and helping to address the hazards of electromagnetic radiation. This material is widely used in aerospace, military equipment, microelectronic devices, consumer electronics, and other fields.

A method for efficient photocatalysis in which electric charge carriers are energetically excited upon absorption of electromagnetic radiation, characterized in that the charge carriers are separated by a pyroelectric field.

The invention relates to a method for the lithography-based additive manufacturing of a three-dimensional component, in which a beam emitted by an electromagnetic radiation source (3) is focused onto a focal point within a material (2) by means of an optical imaging unit (12) in order to introduce an exposure dose into the material (2), and the focal point is shifted by means of a deflection system positioned upstream of the imaging unit (12) in the beam path, and a volume element of the material (2) located at the focal point is solidified by means of multiphoton absorption, wherein the shifting of the focal point comprises a first movement component (18), namely an in particular continuous shifting along a main path, onto which a second movement component (21), namely a repeated transverse movement running transversely to the first movement component, is superimposed, and the exposure dose is modulated during the transverse movement.

An endovascular system for targeted photothermal ablation of perivascular nerves is disclosed. A catheter includes a fluid lumen communicating with outlet orifices, and an electromagnetic radiation emitter positioned within a support structure that apposes the array against a vessel wall. A proximal console independently controls irradiation and injection parameters. In use, a nanofluid comprising plasmonic nanoparticles, such as gold nanorods tuned for near-infrared absorption, is injected into or through the vascular wall and subsequently irradiated intraluminally; the nanofluid absorbs energy and converts it to heat to ablate adjacent nerve fibers while reducing non-target tissue heating.

Electromagnetic shields and methods are provided for electromagnetic shielding. The electromagnetic shields include a first material configured for reflection and / or absorption of electromagnetic radiation and that includes a polymer matrix with magnetic and / or conductive nanoparticles dispersed therein. The electromagnetic shield may be provided between a source of electromagnetic radiation and an object to provide the electromagnetic shielding to the object.

The invention provides an electromagnetic shielding composite material, a preparation method and application, the electromagnetic shielding composite material comprises glass coating microfilaments and silicone rubber, and the glass coating microfilaments comprise Co60Fe15B15Si10. According to the electromagnetic shielding composite material, the preparation method and the application, comprehensive protection of electromagnetic radiation is ensured by combining the enhanced shielding effectiveness with excellent absorption and reflection loss characteristics.

Organic optoelectronic component (100) comprising: - an organic layer sequence (1) with an active layer (10) for emission or absorption of electromagnetic radiation; - a thin-film encapsulation (2) on the organic layer sequence (1); - an absorption layer (4) on the organic layer sequence (1) which is designed to absorb and store a substance harmful to the organic layer sequence (1); - a transport layer (3) directly adjacent to the absorption layer (4), which is designed to transport the harmful substance, wherein - the transport layer (3) has a larger diffusion coefficient and / or a larger transmission rate for the harmful substance than the absorption layer (4) and the absorption layer (4) has a higher storage capacity for the harmful substance than the transport layer (3), so that upon contact with the transport layer (3) the harmful substance is distributed within the transport layer (3) and subsequently absorbed by the absorption layer (4), and - the active layer (10), the transport layer (3) and the absorption layer (4) overlap in a top view in one area.

A system, method, and apparatus for a short-wavelength infrared pixel based on a non-scattering nanostructure are provided. The method comprises the steps of: forming a back reflector on a substrate of a pixel, wherein the back reflector is configured to reflect electromagnetic radiation; forming a first doping region of a first semiconductor adjacent to the back reflector; forming an absorption region of a second semiconductor adjacent to at least a portion of the first doping region, wherein the absorption region is configured as a photodetector; forming a second doping region of the first semiconductor adjacent to the absorption region, wherein the second doping region is configured to allow electromagnetic radiation to pass into the absorption region; and forming a nanostructure adjacent to the second doping region, wherein the nanostructure is configured such that light incident on the pixel passes through the nanostructure and a portion of the light reflected from the back reflector moves toward the absorption region.

A cooking vessel includes a cooking surface and a lower portion positioned below the cooking surface. A first material is disposed within the lower portion and is in thermal proximity to the cooking surface. The first material increases in temperature upon absorption of electromagnetic radiation. A second material is disposed within the lower portion and in thermal proximity to the cooking surface. An electrical current is induced in the second material upon exposure to an electromagnetic field. Both the first material and the second material are configured to heat the cooking surface of the cooking vessel when used in a microwave oven or on an induction cooktop, respectively.

The invention relates to a method for producing an adhesive bond (10), comprising the method steps: producing a multi-layer adhesive arrangement (14), comprising: i) an at least partially transparent first adhesive layer (16) contacting the substrate (12), comprising a first radiation-crosslinkable pressure-sensitive adhesive composition which can be crosslinked with electromagnetic radiation having a wavelength λ 1 is crosslinkable, ii) an at least partially transparent second adhesive layer (18) comprising a second radiation-crosslinkable pressure-sensitive adhesive which has a wavelength λ 2 is crosslinkable, and optionally iii) an at least partially transparent intermediate layer (20), wherein λ 1 ≥ (λ 2 + 20 nm), wherein the multilayer adhesive arrangement (14) comprises in the intermediate layer (20) and / or in the first adhesive layer (16) UV blocker which is sensitive to radiation with a wavelength λ 2 has a higher absorption than for radiation with a wavelength λ1 , b) irradiating the multilayer adhesive arrangement (14) with radiation of wavelength λ 2 for crosslinking the second radiation-crosslinkable pressure-sensitive adhesive and for producing a second crosslinked adhesive layer (22), and c) irradiating the multilayer adhesive arrangement (14) with electromagnetic radiation of wavelength λ 1 for crosslinking the first radiation-crosslinkable pressure-sensitive adhesive and for producing a first crosslinked adhesive layer (24).

The present invention relates to a method for estimating the germination characteristics of a plant seed, comprising the following method steps: a) providing a plurality of individual plant seed parts, each plant seed part comprising at least one plant seed, b) producing or providing a test composition comprising: i) water, ii) a two-stage redox indicator, and iii) a fermentation microorganism, c) contacting the plant seed parts with a respective test volume of a test composition in order to obtain a plurality of individual test systems and incubating the test systems, d) measuring the test composition of the incubated test systems using an optical measurement method, in order to determine the optical absorption properties of the respective test composition for the electromagnetic radiation of at least the first wavelength [lambda] 1 and the second wavelength [lambda] 2, in order to obtain a plurality of absorption data records assigned to the respective test system, wherein the absorption data record comprises information about the absorption characteristics of the respective test composition at the first wavelength [lambda] 1 and the second wavelength [lambda] 2, where [lambda] 1 and [lambda] 2 differ by 10 nm or more, e) evaluating the absorption data record assigned to the test system using a machine learning-based estimation module, so as to estimate germination characteristics of the plant seed in the respective plant seed portion.

Metamaterial devices for optical absorption, dispersion and directional sensing include optically transparent prisms made of a wide range optically transparent material, the prisms comprising a lens surface that is exposed to a source of electromagnetic radiation, with the other surfaces of the prism adjacent to a sensing device, a reflective surface and / or an optical absorption surface. Absorption devices are configured to trap and absorb the electromagnetic radiation that enters the lens surface. Dispersion devices are configured to scatter the electromagnetic radiation that enters the lens surface and the infrared radiation that radiates from an object and through the prism towards the lens surface. The directional sensing devices are configured to selectively detect electromagnetic radiation entering the device at a target angle.

The invention relates to an optical system, in particular for microlithography, and to a method for operating an optical system. According to an aspect of the invention, the optical system comprises at least one mirror (100, 500, 600) having an optically effective surface (101, 501, 601) and a mirror substrate (110, 510, 610), wherein at least one cooling channel (115, 515, 615) in which a cooling fluid can flow is arranged in the mirror substrate for dissipating heat generated in the mirror substrate as a result of the absorption of electromagnetic radiation incident on the optically effective surface from a light source, and an adjustment unit (135, 535, 635) for adjusting the temperature and / or flow rate of the cooling fluid as a function of a measured variable characterizing the thermal loading in the mirror substrate or as a function of an estimated thermal loading expected in the mirror substrate at a given power of the light source.

The utility model discloses electron beam coaxial wire feeding additive manufacturing equipment, and belongs to the technical field of additive manufacturing. The electron beam coaxial wire feeding additive manufacturing equipment comprises a fixed table, a machining platform is arranged on the side walls of a plurality of movable plates, a buffer assembly is arranged at the bottom of the fixed table and comprises a supporting rod, the outer wall of a fixed box is sleeved with a buffer rubber sleeve, and a wire feeding additive device is arranged at the top of an inner cavity of the fixed box. The cooling efficiency of the two sides of workpieces of various heights can be improved, a plurality of hydraulic buffering cylinders can be matched with a rubber pad to conduct certain buffering and damping on the bottom of equipment, then the stability of the workpieces during printing is ensured, a buffering rubber sleeve can be used for effectively buffering and consuming external impact force, damage to the wire feeding and material adding device is avoided, and the production efficiency is improved. Moreover, the electromagnetic shielding layer can effectively suppress electromagnetic radiation, improves the stability of the equipment, and protects an operator and internal devices of the equipment from being affected by electromagnetic interference.

A communication system is disclosed where information is embedded in the frequency of an optical electromagnetic radiation carrier, and concurrently, information is embedded in the amplitude of the optical electromagnetic radiation carrier. The electromagnetic radiation carrier is then propagated and collected by a receiver. The receiver is composed of a demodulator that can determine frequency of the electromagnetic carrier independently of carrier amplitude. The demodulator then extracts information from the electromagnetic carrier frequency and amplitude. The demodulator utilizes dispersion adjacent to absorption in paramagnetic vapors to determine frequency, and can also measure signal amplitude.

An apparatus includes a compact folded path unit for optical gas detection and / or measurement using gas absorption spectroscopy. The apparatus includes a source (1601) of electromagnetic radiation, a gas sample unit (1606) housing reflective elements (1604, 1605), and an electromagnetic radiation detector (1602). The source (1601) and the detector (1602) are arranged between the reflective elements (1604, 1605) in an arrangement that reflects radiation away from the source (1601) and the detector (1602) until the reflected radiation has a sufficient optical path length, and then reflects radiation towards the detector (1602). Spectral analysis may be used to determine the presence of at least one gas within a gas sample and / or to measure at least one parameter of the at least one gas.

A method and device for predicting human body electromagnetic radiation. The method includes: obtaining simulation model data, material parameters, and a simulation frequency range; constructing a human body electromagnetic radiation simulation prediction environment according to the simulation model data, material parameters, simulation frequency range, and an excitation source of a high-voltage component preset; performing human body electromagnetic radiation prediction simulation in the human body electromagnetic radiation simulation prediction environment to obtain a simulation result; calculating the absorption power density of different human tissues according to the simulation result and material parameters; calculating the temperature change of different human tissues according to the absorption power density; and determining the predicted risk position where the human body electromagnetic radiation exceeds the standard according to the temperature change. It can predict human body electromagnetic radiation in the early stage of the development of an electric vehicle whole vehicle; it can also calculate the average increased temperature of the radiation of different human tissues / organs by the electric vehicle through integration calculation, realize the prediction of the radiation of different human tissues / organs, and improve the practicability and accuracy of the prediction.

The invention discloses electromagnetic shielding mortar for a wall surface and a preparation method thereof, and relates to the technical field of building materials, the electromagnetic shielding mortar is prepared from the following raw materials in parts by weight: 100-120 parts of cement, 65-75 parts of quartz sand, 100-150 parts of metal ore sand, 30-40 parts of surface modified superfine graphene powder, 50-60 parts of inorganic glass body powder, 25-35 parts of silver ion powder and 20-25 parts of superfine silver silk fiber. According to the invention, an absorption-reflection-capacitance three-layer cooperative shielding mechanism is constructed, so that unprecedented broadband efficient electromagnetic shielding is realized. The magnetic metal ore sand serves as an absorption layer, and electromagnetic wave energy is converted into heat energy through magnetic loss; the silver silk fibers and the silver ion powder form a multi-dimensional conductive network as a reflecting layer, so that electromagnetic waves are efficiently reflected; the ultra-fine graphene powder forms a micro-capacitance structure with the huge specific surface area, energy is consumed through dielectric polarization relaxation, the industrial problem of electromagnetic radiation leakage of buildings with special functions is solved, and reliable electromagnetic safety protection is provided for the surrounding environment.