464results about How to "Improve excitation efficiency" patented technology

In a light emitting diode, a blue light emitting element is mounted on a base having a cup through a phosphor-containing mount so that the light emitting element is located within the cup and is mounted on the bottom of the cup through the phosphor-containing mount. The light emitting diode includes a light emitting element and a p electrode. By virtue of the above construction, blue light emitted from the light emitting element can be reflected from the lower surface of the p electrode without being radiated directly from the upper surface of the light emitting element to the outside of the light emitting diode. As a result, the blue light emitted from the light emitting element can be efficiently mixed with yellow light given off from the phosphor in the phosphor-containing mount to provide white light which is radiated to the outside of the light emitting diode with high efficiency. The white light can be perceived by a viewer to be uniformly radiated from the light radiating surface of the light emitting diode.

A thin plate of synthetic single crystal diamond material, the thin plate of synthetic single crystal diamond material having: a thickness in a range 100 nm to 50 μιη; a concentration of quantum spin defects greater than 0.1 ppb (parts-per-billion); a concentration of point defects other than the quantum spin defects of below 200 ppm (parts-per-million); and wherein at least one major face of the thin plate of synthetic single crystal diamond material comprises surface termination species which have zero nuclear spin and / or zero electron spin.

A thin plate of synthetic single crystal diamond material, the thin plate of synthetic single crystal diamond material having: a thickness in a range 100 nm to 50 μιη; a concentration of quantum spin defects greater than 0.1 ppb (parts-per-billion); a concentration of point defects other than the quantum spin defects of below 200 ppm (parts-per-million); and wherein at least one major face of the thin plate of synthetic single crystal diamond material comprises surface termination species which have zero nuclear spin and / or zero electron spin.

The invention relates to a light source for irradiating molecules present in a detection volume with one or more selected wavelengths of light and directing the fluorescence, absorbance, transmittance, scattering onto one or more detectors. Molecular interactions with the light allow for the identification and quantitation of participating chemical moieties in reactions utilizing physical or chemical tags, most typically fluorescent and chromophore labels. The invention can also use the light source to separately and simultaneously irradiate a plurality of capillaries or other flow confining structures with one or more selected wavelengths of light and separately and simultaneously detect fluorescence produced within the capillaries or other flow confining structures. In various embodiments, the flow confining structures can allow separation or transportation of molecules and include capillary, micro bore and milli bore flow systems. The capillaries are used to separate molecules that are chemically tagged with appropriate fluorescent or chromophore groups.

The invention discloses a double-color laser light source which comprises a blue laser and a red laser which emit blue laser light and red laser light respectively; and a fluorescent wheel, the surface of which is coated with green fluorescent powders, wherein the green fluorescent powders emit green fluorescence when excited by the blue laser light. The double-color laser light source also comprises a speckle dissipation system. The speckle dissipation system comprises a first diffusion portion which is controlled to rotate, is arranged in a beam shaping optical path of the blue laser light and red laser light and is used for diffusing the blue laser light and the red laser light; and a second diffusion portion which is controlled to rotate, is arranged before a blue laser light, red laser light and green fluorescence incident light bar, and is used for at least penetrating the blue laser light and the red laser light sequentially and forming blue light and red light output. The double-color laser light source can effectively reduce speckle effect and improve display quality of projected images.

A microscopy device, particularly for use in an imaging fluorescence lifetime microscopy method is provided. The microscopy device comprises an illumination means for generating an illumination beam, an imaging detector for spatially resolved acquisition of an emission radiation emitted by an object to be examined, an illumination beam path between the illumination means and the object to be examined, and a detection beam path between the object to be examined and the detector. The illumination beam path comprises illumination optics which are designed to generate a light sheet of illumination radiation extending transverse to the axis of the illumination beam path, wherein the axis of the detection beam path is oriented substantially perpendicular to a section plane of the light sheet and of the object to be examined. The illumination means comprise a pulsed laser.

The invention relates to a separation free bioanalytical assay method for measuring an analyte from a biological fluid or suspension comprising of microparticles as a bioaffinity binding solid phase, a biospecific secondary reagent labelled with a two-photon fluorescent dipyrrometheneboron difluoride dye, focusing the laser into the reaction suspension, measuring two-photon excited fluorescence from single microparticles when they randomly float or are guided by the radiation pressure of the excitation laser through the focal volume of the laser beam using a two-photon fluorescent dipyrrometheneboron difluoride dye. The dye has the structure (II): Either at least one of groups R1, R2, R3, R4, R5, R6 and R7 is a substituted or unsubstituted phenyl, thienyl, pyrrolyl, furanyl, oxazolyl, isoxazolyl oxadiazolyl, imidazolyl, benzoxazolyl, benzothiazolyl, benzimidazolyl, benzofuranyl, indolyl, conjugated ethenyl, dienyl or trienyl group, and at least one of the groups R1, R2, R3, R4, R5, R6 or R7 is substituted to yield a chemically reactive group that can be used for selective covalent linkage to other molecules, and at least one of the groups R1, R2, R3, R4, R5, R6 or R7 is substituted to yield a water-solubilizing group, and the remaining groups of R1, R2, R3, R4, R5, R6 and R7 are each independently selected from the group consisting of hydrogen, halogen, alkyl, cyano, carboxy, each of which can optionally be substituted; or groups R1, R2, R3, R5, R6 and R7 are substituted or unsubstituted alkyl groups, R4 is a hydrogen or a substituted or unsubstituted alkyl, and at least one of the groups R1, R2, R3, R4, R5, R6 or R7 is substituted to yield a chemically reactive group that can be used for selective covalent linkage to other molecules; and at least one of the groups R1, R2, R3, R4, R5, R6 or R7 is su

The invention discloses an LED and a dispensing method of LED fluorescent powder. The dispensing method comprises the steps of: A, providing a bearing seat and an LED blue light chip, and fixing the LED blue light chip on the bearing seat through primer; B, respectively connecting the positive and the negative electrodes of the LED blue light chip with the positive and the negative electrodes of the bearing seat by using wires; C, mixing the fluorescent powder, nano powder and silicon gel according to a preset proportion to form fluorescent gel, and uniformly stirring; D, carrying out vacuumizing defoaming treatment on the fluorescent gel to eliminate remained gases in the fluorescent gel formed through mixing; E, coating the fluorescent gel on a dispensing position on the surface of the LED blue light chip at a dispensing height; and F, heating and curing the fluorescent gel coated on the surface of the LED blue light chip. The method has better effect on improving excitation efficiency of the fluorescent powder, uniformity of emitted light distribution and consistency of color temperature.

The invention discloses a detection system and a detection method of petroleum-type pollutants. The detection system comprises an emitting unit, a receiving unit, a reference unit and a signal processing unit. The emitting unit is used for emitting laser signals, and transmitted light signals and reflected light signals are outputted; an input terminal of the reference unit receives the transmitted light signals emitted from the emitting unit. An output terminal of the reference unit is connected to an input terminal of the signal processing unit. Reference signals outputted by the reference unit are transmitted to the signal receiving unit by the output terminal of the reference unit. A sample in a sample tank is excited by the reflected light signals, such that fluorescence signals are generated. The fluorescence signals are received by the receiving unit beside the sample tank, and are outputted to the signal processing unit by the receiving unit. The fluorescence signals are processed by the signal processing unit. The system and the method provided by the invention are based on laser-induced fluorescence detection principles. Emitted signals are modulated by using a modulation technology, such that the detection sensitivity of the system is high. With the method and the system, rapid, real-time, on-line and non-contact measuring upon water body petroleum-type pollutant fluorescence signals can be realized. The system and the method can be widely applied in water body environment monitoring.

The invention discloses a reflected near-field Lamen spectrometer measuring head based on local field reinforcing elementary of metal nanometer probe in the near-field optical, spectrum analytical detector technical domain, which is characterized by the following: adjusting the incidence angle of the excited light and the collecting angle of near-field Lamen spectrum signal; collecting the near-field Lamen spectrum signal from different directions; realizing multiple measuring patterns; improving the exciting efficiency and collecting efficiency of near-field Lamen spectrum signal effectively as well as the signal-to-noise ratio and detecting sensitivity; obtaining the nanometer size shape image, hyper-diffraction resolution near-field Lamen spectrum and near-field Lamen spectrum image simultaneously. adopting paralleling beam interface to combine with each kind of Lamen spectrometer or commercial Lamen spectrometer; fitting for dielectric size study in the biological, medical, chemical, physical and material domains widely.

A radio-frequency antenna has two end rings and a number of antenna rods that form a birdcage resonator. A coupling element couples high-frequency electromagnetic energy into the resonator in the transmission mode and out therefrom in the reception mode. The coupling element is fashioned as a conductor system tangentially surrounding the resonator and into which a high-frequency systems of currents can be fed in the transmission mode or from which a high-frequency system of currents can be fed out in the reception case. The coupling element is coupled only inductively to the resonator.

The invention discloses a full-optical laser ultrasonic measuring method for internal defects of a material. The method comprises the following steps: firstly, measuring the two-dimensional position and the size of the internal defect of a measured object on an x-y plane, and subsequently measuring the depth of the internal defect of the measured object in the z direction. By adopting the method, the three-dimensional position and the size information of the internal defect can be obtained by scanning, and the method is high in precision and efficiency, and is applicable to non-destructive detection on various materials.

The invention relates to a detection optical fiber based on a surface plasma resonance principle and a sensor. The surface plasma resonance detection optical fiber comprises a fiber core and air holes arranged on the axial direction of the fiber core and is characterized in that the first air hole of a solution channel for detecting is positioned in the center of the cross section of the optical fiber; the inner wall of the first air hole is plated with a metal film; a sensing material is plated on the inner surface of the metal film; N second air holes are distributed in the fiber core and at the periphery of the first air hole uniformly and respectively; N is an integer of more than 1; and the connecting line of the central points of the N air holes is shaped like a regular N-side polygon. According to the detection, mutual influence among the conventional channels of various samples is avoided, the resonance spectrum is narrow, and the signal to noise ratio is high. The sensor breaks through the limit that the refractive index detection upper limit of the conventional similar sensor is less than 1.42 and can effectively detect the chemical organic solution with high refractive index.

The invention discloses a package method for a high-gamut white-light quantum-dot light emitting diode (LED). The package method comprises the following steps of (a) separately adding an organic solvent to red-light quantum-dot fluorescent powder and blue-light quantum-dot fluorescent powder; (b) carrying out ultrasonic processing on the solution; (c) preparing a mixed quantum-dot solution; (d) adding package glue to the mixed quantum-dot solution, and uniformly stirring the package glue; (e) removing the organic solvent; (f) adding green-light rare-earth fluorescent powder; and (g) dropping the mixed fluorescent glue to an LED support fixed with an ultraviolet chip, roasting and curing the mixed fluorescent glue to obtain an LED light bead. By the package method, the high-gamut white-light LED is obtained, and the gamut value of the LED back-light bead is greatly increased and can reach over 92% of NTSC; the organic solvent is taken as a connection bridge, so that quantum dots and the package glue are uniformly mixed, the agglomeration failure phenomenon of the quantum dot fluorescent powder is prevented, and the quality of the high-gamut white-light LED bead is remarkably improved.

The invention discloses a backlight module and liquid crystal display equipment and relates to the technical field of liquid crystal display. By means of the backlight module and the liquid crystal display equipment, the utilization rate of quantum dot materials in the backlight module can be effectively improved, and stimulation efficiency of the quantum dot materials in the backlight module is improved. The backlight module comprises a base plate, LED light-emitting chips and a quantum dot packaging layer, and the LED light-emitting chips are arranged on the inner side of the base plate; the quantum dot packaging layer is arranged above the LED light-emitting chips, and a gap is formed between the quantum dot packaging layer and the LED light-emitting chips, reflection net points are formed in the positions, located on one sides of the LED light-emitting chips, of the quantum dot packaging layer, the transmission path of part of light rays emitted by the LED light-emitting chips is changed, then the quantum dot materials are stimulated, the stimulation range of the light rays emitted by the LED light-emitting chips on the quantum dot packaging layer is broadened, and the utilization rate of the quantum dot materials in the backlight module is raised, and the stimulation efficiency of the quantum dot materials is improved. The backlight module is applied to the liquid crystal display equipment.

The invention discloses two axial excitation double salient pole motors and belongs to the field of motors with double salient pole structures. Each motor comprises at least two double salient pole monomer structures which are axially arranged, wherein each monomer structure consists of a salient pole stator core, an armature winding wound on the stator core and a salient pole rotor core; the stator core of each monomer structure forms a magnetic circuit through stator axial magnetic back iron; the rotor core forms a magnetic circuit through rotor axial magnetic back iron in a motor structure with an annular excitation winding or annular permanent magnet steel; the stator core, the stator axial magnetic back iron and the permanent magnet steel have arc structures which are equationally divided into 2n (n is a natural number) parts in the motor structure without the rotor axial magnetic back iron; and the rotor of each monomer structure is arranged on a rotating shaft. The motors have the advantages of high space utilization rate of the excitation winding, no additional air gap, high excitation efficiency and high utilization rate of axial sectional areas and can be used as electromotors or generators.

The invention discloses an LED light source module which comprises a substrate, a fluorescent powder layer, a lens module and an LED light emitting chip arranged on the substrate. The lens module comprises a main body, a frame and a lens unit, wherein, the edge of the main body stretches towards one side to form the frame, and the main body partially protrudes to form the lens unit; the substrate is covered at the outer side of the frame to form an enclosed box body with the lens module; the LED light emitting chip is arranged in the box body; and the fluorescent powder layer is arranged on the inner surface of the main body. By adopting the LED light source module of the technical scheme of the invention, the substrate and the lens module form the enclosed box body and the fluorescent powder layer is coated on the inner surface of the lens module so that the fluorescent powder layer is far away from the LED light emitting chip, thus being beneficial to lowering the temperature of the fluorescent powder layer, improving the excitation efficiency and the service life of fluorescent powder in the fluorescent powder layer, and increasing the light extraction ratio; and meanwhile by adopting an inwards concave hollow structure of the lens module, the fluorescent powder can be directly dripped on the inner surface of the lens module to form the fluorescent powder layer, so a complicated powder dispersing process is not required, thus achieving simple operation.

The invention mainly relates to a design method for enhancing seismic waves to stimulate illumination in a complex structure region. The design method comprises the following steps that (1) exploration area data are collected, a geological model of the complex structure region is established, and a geological target is determined; (2) an artificial seismic source is arranged at the target position, and illumination simulation is conducted through a wave equation forward modeling method; (3) statistics of illumination energy, upwards spread to the ground surface, of the seismic waves is conducted when illumination simulation is conducted; (4) an optimal encryption shot region on the ground surface is determined according to the statistical result of the illumination energy on the ground surface; (5) the main direction of emergence, on the ground surface, of the seismic waves stimulated by a target seismic source is calculated through a poynting vector, and the spread direction of a seismic wave beam stimulated by a phase-controlled seismic source is determined; (6) combined stimulation parameters of the phase-controlled seismic source are designed on the basis of a phase-controlled theory and the theoretical signal-to-noise ratio maximization principle of combined seismic sources; (7) a construction scheme for enhancing the illumination energy provided by the seismic waves for the target on the ground surface in the complex structure region is determined. The design method is good in application effect and can reduce the collection cost.

The invention discloses an in-situ integrated multi-spectrum measurement system and method. The system comprises an in-situ integrated multi-spectrum induction excitation unit, at least one light source and excitation light focusing unit, at least three spectrum signal detection units, at least one annular track and radial radiation arms matched with the annular track, wherein each arm slides along the track around the corresponding center axle of the annular track, the total number of the radial radiation arms is at least four. The in-situ integrated multi-spectrum induction excitation unit is a surface plasma resonance coupling element and arranged in the center area of the first annular track. The intersecting line of a non-sample contact surface of a surface plasma resonance sensing film and a central symmetrical surface of a surface plasma resonance coupling prism is coincident with the center axle of the first annular track. The light source, the excitation light focusing unit, and the spectrum signal detection units are respectively fixed on the respective radial radiation arms.

A light-emitting device can include a fluorescent plate having a first surface and a second surface opposite to the first surface and configured to emit fluorescent light by laser irradiation. A first laser light source can be disposed such that the first surface of the fluorescent plate is irradiated with first laser light. A second laser light source can be disposed such that the second surface of the fluorescent plate is irradiated with second laser light. A reflector can include a light passing hole through which the second laser light can pass and can include a concave reflecting surface configured to cover an irradiation region with the second laser light at least on the fluorescent plate. A lens can be disposed in a space closer to the first surface of the fluorescent plate.

The invention provides a wet-ground carbide-slag-containing activator and application. The wet-ground carbide-slag-containing activator is mainly prepared by subjecting 60-65 parts of carbide slag, 9-9.8 parts of surfactant, 6-6.5 parts of stabilizer and 10-30 parts of water to a wet grinding process. The wet-ground carbide-slag-containing activator has the advantages that the activator uses the carbide slag whose main components are calcium hydroxide and calcium carbonate as the main raw material, the wet grinding process is used to improve the fineness of the carbide slag and increase the specific surface area of the carbide slag so as to increase the dissolution rate and dissolution quantity of the calcium hydroxide and calcium carbonate in the carbide slag, high alkalinity is providedfor the pozzolanic reaction of slag glass, and accordingly slag pozzolanic reaction efficiency is increased, and a slag-based cementitious material is allowed to be high in compressive strength; whenthe mixing amount of the wet-ground carbide-slag-containing activator is 10-15%, the slag-based cementitious material can meet the national standard of 32.5 strength level of ordinary Portland cement.

The invention discloses a method and device for adaptively scanning tomographic microimaging with wide view field and high-throughput, and belongs to the technical field of microimaging. According tothe method, the target imaging area of a sample is divided into a plurality of sub-areas by utilizing ultrashort pulse laser through a method of combining spatial and temporal focusing and scanning, each sub-area is quickly and adaptively scanned by adopting a time division multiplexing method, synchronous data collection is carried out, reconstruction and data processing are performed on collected microimages in each sub-area to obtain a three-dimensional spatial message of the target scanning area in a scanning cycle, and the four-dimensional information of a sample (x, y, z and t) is acquired through three-dimensional spatial scanning and delayed scanning. The device comprises an ultrashort pulse laser light source and beam conversion system, a sub-area scanning system combined with thespatial and temporal focusing technology, an optical microscopic and filter system, a synchronous microimaging system and an image reconstruction and data processing system. The device has the advantages of wide view field, high throughput, low exciting power, high signal-to-noise ratio and the like.

The invention discloses a surface plasmon excimer electrically-induced excitation source with a medium-metal near field coupling structure. The surface plasmon excimer electrically-induced excitation source comprises a substrate, semiconductor quantum well epitaxial layer, a metal layer and a coupling output structure. The semiconductor quantum well epitaxial layer is loaded on the surface of the substrate. The metal layer is loaded on the surface of the semiconductor quantum well epitaxial layer. The coupling output structure is located in the metal layer. The invention further discloses a manufacturing method of the surface plasmon excimer electrically-induced excitation source. The method includes the steps that the semiconductor quantum well epitaxial layer is grown on the substrate; a device unit is etched on the grown semiconductor quantum well epitaxial layer; the metal layer is deposited on the etched device unit; the coupling output structure is manufactured in the deposited metal layer. According to the surface plasmon excimer electrically-induced excitation source, the semiconductor quantum well material is adopted to serve as an active medium, based on the near field coupling principle, the quantum efficiency is high, the light emitting wavelength range is wide, the excitation efficiency is high, the manufacturing process is simple, integration is conducted conveniently, and the surface plasmon excimer electrically-induced excitation source and the manufacturing method have great research value and application prospects.

The invention relates to an enhanced oxygen fluorescence sensitive film and a preparation method thereof. According to the preparation method, a sol-gel or polymer matrix is used for effectively embedding a fluorescent probe metal complex and a fluorescence enhancing substance nano titanium dioxide particle so as to prepare a nano material doped photochemical sensor film with enhanced response to oxygen. An oxygen sensitive film prepared according to the preparation method has advantages of uniform surface, good mechanical strength, good fluorescence intensity and easiness in manufacturing process and can be detected by a photoelectric detection device with low sensitivity, and the sensor cost is reduced effectively; therefore the enhanced oxygen fluorescence sensitive film is easy to miniaturize and generalize.

The invention provides an alternating-current excitation synchronous machine control device and method, and belongs to the field of electromechanical control engineering. According to the method, alternating-current excitation is conducted on a wound-type motor rotor winding through a variable-frequency controller, excitation efficiency is improved by controlling the excitation current of the motor through a rotor, the capacity of the system is decreased to be twenty percent or lower that of the motor, the capacity of the variable-frequency controller is greatly decreased, and device cost is greatly reduced. Active power of the motor running is provided by a stator winding through a power grid, the power factor on the stator side can be controlled to be 1, the speed regulation system is made more reasonable and more efficient through excitation control, and four-quadrant operation is achieved.

The invention discloses an inverted packaging technology for a wafer-level LED. The technology comprises the following steps: fluorescent powder glue is coated on the back side of an LED wafer; the wafer with a fluorescent powder coating is divided into individual chips; the LED chips with front side facing downwards are arranged on a baseplate; and the chips and the baseplate are welded and fixed through chip soldering points and are sealed by glue through irrigation. The packaging technology provided by the invention has the advantages that the wafer-level fluorescent powder coating is uniform in thickness, so that the wavelength distribution and color of light given out by the different chips are ensured to be consistent; and besides, the fluorescent powder glue can be coated on the LED wafer at one time, the coating technology for individual chips is avoided, and the production efficiency is improved.

A device for measuring the optical properties of an object, particularly of a chemical and / or biological sample, comprises an illumination light source for illuminating the object. Further, an excitation light source is provided for illuminating the object, wherein the radiation of the excitation light source being suited to change the optical properties of the object. Further, the excitation radiations is focused in a measurement volumes arranged within the object. By means of a detector device, there can be detected preferably the transmission of the illumination radiation through the object within the measurement volume.