30results about How to "Improve light performance" patented technology

The invention provides a method and a system for combined optical performance monitoring, rate and modulation pattern recognition, which can identify optical signal rate and modulation format while realize optical performance monitoring. The method comprises the following steps of: acquiring two-dimensional scatter maps of different rates and different modulation formats under different light performance damages, and dividing the acquired two-dimensional scatter maps into a training set and a test set; A multi-task convolutional neural network model is constructed, in which the first four layers are convolutional pooling layers, the fifth layer is feature sharing layer, and the sixth layer has three output ports, the first output port is optical performance damage monitoring output, the second output port is modulation format class output, and the third output port is rate class output. The training set is used as the input of the multi-task convolutional neural network model, and thecorresponding light performance damage value, rate category and modulation format category are used as the label value training model. The present invention is suitable for optical performance monitoring and rate/modulation format recognition operations.

The invention relates to spherical terbium doped tungstate green phosphor powder and a preparation method thereof; the phosphor powder is spherical crystal; the particle size distribution is 1 to 5 mum, and the center particle diameter D50 is 3 to 4 mu m; and the chemical molecular formula is R1-2x(Tb, Na)2xWO4, wherein, R is one of Ca, Sr and Ba, and x equals to 0.01 to 0.2. The Tb3+ doped alkaline earth tungstate green phosphor power obtained by adopting the invention is nanometer crystal; the particles have regular shape, even size distribution, good phosphor powder optical property and stable physical and chemical properties; under the excitation of the ultraviolet ray, X-ray and energetic particles, the Tb3+ doped alkaline earth tungstate green phosphor power can achieve visible light emission when the wavelength is 545nm, and realize high energy conversion; besides, the emission wavelength is conducive to lighting and color and positioned on the sensitive response wave band of CCD simultaneously; and the spherical terbium doped tungstate green phosphor powder and the preparation method thereof have wide application prospects in the fields such as lighting, plasma flat-panel display, etc.

The invention discloses a Re-alsic-rare-earth-aluminum-silicon-carbide-based LED rare earth thick film circuit electric light source device which is characterized in that the device comprises a substrate and serial rare earth electronic slurry, the serial rare earth electronic slurry is prepared on the substrate in the mode of a thick film circuit, the serial rare earth electronic slurry comprises coating slurry, rare earth resistance slurry, rare earth electrode slurry and rare earth medium slurry. Substrate vacuum impregnation ingredients comprise, by weight ratio, 2-7% of magnesium and 1.5-2.5% of rare earth metal neodymium and scandium together except for aluminum. The Re-alsic-rare-earth-aluminum-silicon-carbide-based LED rare earth thick film circuit electric light source device is good in compatibility, firm in combination, large in power density, high in thermal shock resistance, high in heat dissipation efficiency, environmentally friendly, capable of saving energy and safe and reliable, and good match of the device and LED chips is achieved.

The present invention is green phosphor of spherical RE phosphater and its preparation process. The green phosphor has chemical molecular expression of (Lax, Cey, Tbz) PO4, and is one kind of spherical crystal with particle size of 2-10 microns and central particle size D50 of 3-6 microns. the green phosphor of spherical RE phosphate may be prepared via liquid phase precipitation process. It has regular particle shape, homogeneous size distribution, better performance and simple preparation process.

The invention discloses a low-reflection optical interface layer and a preparation method thereof. The interface layer is a nanometer porous particle film formed by nanometer particles deposited on a base material, the thickness of the film is 50-200nm, the sizes of the pores in the film are 50-200nm, and the porosity of the film is 30-75%. The preparation method comprises the following steps of: (1) preparing at least two nanometer particles into dispersion liquid with a mass concentration of 0.3-8.0%; (2) depositing the nanometer particle dispersion liquid on the base material to form a nanometer particle composite film; (3) selectively removing sacrificial components in the nanometer particle composite film; and (4) thermally treating an accessory for a certain time at a temperature approximate to the glass transition temperature of organic particles and the organic base material. The low-reflection optical interface layer provided by the invention has a reflectance less than 1% when incident electromagnetic waves are in the range of 360-900nm, and the reflectance at the lowest place is less than 0.5%. The low-reflection optical interface layer has high binding strength with the base material and stable optical performance. The optical interface layer is simple to process, and the optical interface layer with low reflectance is suitable to be prepared on organic and inorganic base materials with large areas.

The invention relates to a preparation method of a single layer molybdenum disulfide and titanium dioxide nano heterojunction. The method includes: firstly subjecting an Si/SiO2 substrate to ultrasonic cleaning, and then performing blow drying; putting a graphite boat loaded with molybdenum trioxide in a high temperature area of a chemical vapor deposition apparatus for heating, putting an Si/SiO2substrate on the graphite boat and conducting vacuum pumping; introducing a protective gas into a closed quartz tube, then performing evacuation, heating a tube furnace, raising the temperature to 700-800DEG C, conducting heat preservation for 5-20min, stopping heating, and performing cooling to room temperature to obtain flake single layer MoS2; dissolving tetrabutyl titanate in anhydrous ethanol, then adding acetyl acetone, and performing stirring at room temperature to titanium dioxide sol; immersing the flake single layer MoS2 in titanium dioxide sol, anhydrous ethanol and deionized waterin order, then using anhydrous ethanol for flushing to remove water attached to the surface, and then conducting annealing in a 500-550DEG C muffle furnace for 1-2h, thus obtaining the single layer MoS2/TiO2 nano heterojunction structure.

The invention belongs to the technical field of rubber quartz plates, and particularly discloses a gray rubber quartz plate and a preparation method of the gray rubber quartz plate. The gray rubber quartz plate has the technical scheme that the quartz plate comprises a plate body and a rough surface layer, and is characterized in that the plate body comprises the following materials in parts by weight: 100 parts of rubber, 5.9-29 parts of quartz powder, 10-52 parts of white carbon black, 4-18 parts of activating agent, 0.8-5.5 parts of accelerating agent, 0.9-8.5 parts of vulcanizing agent, 2-50 parts of softener, 0.8-1.1 parts of coloring agent, 0.8-2 parts of bonding agent, 1-5 parts of anti-aging agent and 1.8-4.0 parts of solubilizer. The wear-resistant performance as well as the acid-resistant and alkaline-resistant properties of the rubber quartz plate can be improved, the heat absorption and the high light reflection can be reduced, and the service life is greatly prolonged.

The invention relates to a high-temperature-resistant, easy-to-dissolve and flame-retardant fluorinated polyaryl ether nitrile resin and a preparation method thereof. Firstly, bisphenol AF, 2,6-dichlorobenzonitrile and a catalyst are mixed to obtain a mixture, a solvent and a dehydrating agent are added to the mixture, and an aromatic nucleophilic substitution reaction is carried out in a protective atmosphere, wherein the molar ratio of bisphenol AF to 2,6-dichlorobenzonitrile to the catalyst to the solvent to the dehydrating agent is 1:1:(1.1-1.6):(5-11):(1.5-2); after the aromatic nucleophilic substitution reaction is finished, the reaction product is poured into a precipitant and is precipitated, and precipitates are dried and crushed, and after purification, the high-temperature-resistant, easy-to-dissolve and flame-retardant fluorinated polyaryl ether nitrile resin is obtained. Fluorine atoms are introduced to the product, so the solubility of polyaryl ether nitrile is improved,and the polyaryl ether nitrile can be dissolved in low-boiling-point organic solvents such as acetone, chloroform, tetrahydrofuran and the like; and because of containing of F atoms, the polyaryl ether nitrile resin has good flame retardancy, thermal stability and mechanical properties.

The invention discloses a method for synthesis of microemulsion of strontium molybdate nano light emitting material, comprising the steps of preparing 0.2 mol/L strontium chloride solution and 0.2 mol/L molybdenum source solution, adding mixed solution of the n-butyl alcohol and the surfactant of ethane-di-dodecyl dimethyl ammonium bromide, n-octane and the strontium chloride solution to a container in sequence, supersonically oscillating the container, placing the container in a constant-temperature water bath until the solution in the contain being clear and transparent to obtain strontium chloride microemulsion, preparing molybdenum source microemulsion by using the molybdenum source solution rather than the strontium chloride solution with the similar method, rapidly mixing the strontium chloride microemulsion and the molybdenum source microemulsion, supersonically oscillating the strontium chloride microemulsion and the molybdenum source microemulsion until the strontium chloride microemulsion and the molybdenum source microemulsion being evenly mixing, adding acetone for demulsifing after the reaction of the strontium chloride microemulsion and the molybdenum source microemulsion, absorbing supernatant liquor, and washing the deposited products of reaction with distilled water, acetone and absolute ethyl alcohol in sequence to obtain the strontium molybdate nano emitting material which has the length of 100-600nm and the maximum width of 30-200nm and is in the structure of spindle. The method for synthesizing strontium molybdate nano emitting material microemulsion is easy to obtain the raw materials, is simple, has low cost, ensures that the product of reaction has high purity and controllable morphology and size and is suitable for the scale production.

The present invention discloses process of preparing organic semiconductor compounded nanometer titania line with titania sol of anatase crystal. The process includes the following steps: 1. adding organic semiconductor into titania sol of anatase crystal through stirring to obtain organic semiconductor compounded titania sol; 2. soaking alumina template with nanometer pores inside the sol for filling the sol into the pore canals of the template, or setting the sol on one side of the alumina template and adding negative pressure other the other side to fill the sol into the pore canal of the template; 3. taking out the alumina template with nanometer pores and drying; and 4. and dissolving off the alumina template with nanometer pores with alkali or acid to obtain the organic semiconductor compounded nanometer titania line. The nanometer titania line thus prepared has high optical performance and high carrier transferring efficiency.

The invention relates to an electronic lighting lamp, in particular relating to an electronic lighting lamp which has the advantages of energy conservation, high efficiency, long service life and high power. The automatic temperature-control and heat-dissipation device provided by the invention is formed by connecting a temperature control circuit with a refrigerator, and the temperature control circuit is inserted into and installed on a cold storage metal block of the refrigerator through pipe caps. The high-power LED lamp with an automatic temperature-control semiconductor refrigerator has the following characteristics of high efficiency, energy conservation, super long service life, environmental friendliness, less lumens depreciation and wide application range.

The invention discloses a kind of iridium complex organic fluorescent nanoparticles and a preparation method thereof. The structural formula of the iridium complex organic fluorescent nanoparticles is R2Ir(Mu-Cl)2R2@PEO-b-P4VP, wherein R2Ir(Mu-Cl)2R2 is dichloro-bridged, R is dfppy, ppy or pq, PEO-b-P4VP is polyglycol-b-poly(4-vinylpyridine), the iridium complex organic fluorescent nanoparticles have a spherical morphology, and the grain size is 50nm to 150nm. The nanoparticles have excellent luminescent properties, can emit fluorescent light from blue light to red light and have significant potential application value in the field of luminescent organic nanomaterials; the preparation method of the iridium complex organic fluorescent nanoparticles has the advantages of simpleness in operation, mild conditions, low equipment requirement, no pollution and the like.

The invention provides a handheld card counting machine and relates to counting equipment. The handheld card counting machine comprises a machine body, wherein a display screen is arranged at the upper part of the machine body, a card counting hole is formed in the back of the machine body, a photoelectric sensing head is arranged in the card counting hole, a circuit board is arranged inside the machine body, a function button is arranged outside the display screen, and a USB charging port is arranged at the bottom of the machine body. The handheld card counting machine provided by the invention has the advantages that an optical fiber transmission cold light source is adopted for counting cards, and optical property is better than that of a direct-illumination type thermal light source, so that card counting accuracy is guaranteed, and card counting operation speed is not limited. The invention aims at improving confidence card counting speed and accuracy and simplifying operation, and human-computer interaction information is simple and clear.

The present invention relates to a titanate luminescent material and preparation method thereof. The titanate luminescent material has the following chemical formula: Ca_1−xTi_1−yO₃:Pr_x,R_y@TiO₂@M_z, wherein @ represents coating, M_z is a core, TiO₂ is an intermediate shell; Ca_1−xTi_1−yO₃:Pr_x,R_y, is an outer shell, Pr_x and R_y are doped in Ca_1−xTi_1−yO₃; R is at least one of Al and Ga, and M is at least one of Ag, Au, Pt Pd and Cu metallic nanoparticles; 0<x≦0.01, 0<y≦0.20, z is a molar ratio between M and the element Ti in the titanate luminescent material, 0<z≦1×10⁻². The titanate luminescent material is formed into a core-shell structure by doping a charge compensation agent such as ions Al³⁺, Ga³⁺ and the like, and encapsulating metallic nanoparticles, thus effectively improving the luminous efficiency of the titanate luminescent material. In addition, the titanate luminescent material has the advantages of good stability and good luminous performance, and thus can be used as a red luminescent material in a cathode ray device. Moreover, the preparation method of the titanate luminescent material is of a simple technique, is pollution free and easy to control, has low requirement for device, and is suitable for industrial production.

An automatic optical fiber pull-free type biliblanket weaving device comprises a frame body and an optical fiber feeding mechanism having a pull-free effect on optical fibers. The optical fiber feeding mechanism is assembled on the frame body and conveys the optical fibers to a weaving position. A biliblanket woven by the weaving device uses the optical fibers as wefts and fishing threads as warps. The optical fibers are perpendicularly blown into weaving positions of the fishing threads by compressed gas through the optical fiber feeding mechanism on the top of the frame body when woven intothe biliblanket without any pull actions, and therefore the biliblanket woven by the weaving device has the advantage that the optical fibers are free of removal traces or removal breakage, and the optical property of the biliblanket is greatly improved.