835 results about "High reflectivity" patented technology

The invention discloses a glass lens surface scratch detection method and system, relates to the technical field of precision optical detection, and aims to solve the problems of scratch false detection, leak detection and poor algorithm adaptability caused by interference fringes, noise coupling and poor form adaptability in a high-reflection / complex coating process scene in the prior art. According to the scheme, an orthogonal polarization state composite light field is generated based on a multi-angle polarization light source array and a near-infrared compensation light source, and candidate regions are extracted through dynamic threshold segmentation and a direction gradient tensor matrix; gaussian pyramid multi-scale feature fusion and refraction angle consistency verification are utilized to eliminate artifact interference; constructing a direction constraint convolution kernel group to decompose scratches and background textures, and dynamically allocating computing resources in combination with a cascade network; feeding back closed-loop calibration light source wavelength and convolution kernel parameters in real time through coating parameters; according to the method, the precision and robustness of high-reflectivity surface scratch detection are remarkably improved, and meanwhile, the requirements for high-resolution image processing and real-time performance in a high-speed production line are balanced.

The invention discloses a method for preparing a copper-chromium-niobium alloy high-thermal-conductivity part based on green laser SLM, and relates to the technical field of copper-chromium-niobium alloys. Comprising the following steps that copper-chromium-niobium alloy powder is pretreated; the pretreated copper-chromium-niobium alloy powder is laid on a base plate, green laser is adopted for selective laser melting printing, at least two layers of printing parameters with different energy densities are set in a layered energy gradient control mode, layered printing is carried out, a pore structure with the porosity in continuous gradient distribution is formed, and a pre-machined part is obtained; wherein the wavelength of the green laser is 500 nm to 550 nm, and the spot diameter of the green laser is 15 [mu] m to 30 [mu] m; and the pre-machined part is subjected to heat treatment, and the high-heat-conduction part is obtained. The copper-chromium-niobium alloy part is prepared through the green laser SLM technology, the layered energy density gradient control technology is adopted, and the problems that in copper-based alloy additive manufacturing, the reflectivity is high, the structure is limited, and the performance is insufficient are systematically solved.

The invention discloses a reflection-transmission mixed extreme ultraviolet collimation illumination system, and relates to the technical field of extreme ultraviolet optics. The system comprises a discharge plasma EUV light source, a multilayer film ellipsoid reflector and a collimating super lens. Wherein the discharge plasma EUV light source is used for generating radiation light in an extreme ultraviolet band; the multi-layer film ellipsoid reflector adopts an ellipsoid design, is plated with a high-reflectivity multi-layer film, is arranged on a transmission line of the discharge plasma EUV light source, and is used for focusing light beams of the light source; and the collimating super lens is arranged behind the focal position of the multi-layer film ellipsoid reflector and is used for collimating the focused light beams to form parallel light beams for Talbot photoetching illumination. The extreme ultraviolet illumination system is compact in structure, high in light beam energy and high in collimation, and the exposure quality in an application scene needing high-collimation extreme ultraviolet light beams is effectively improved.

The invention provides a SiO2 / TiO2 / PMMA radiation refrigeration film and a preparation method thereof, and relates to the technical field of passive daytime radiation refrigeration films. The radiation refrigeration film is prepared from the following raw materials: N, N-dimethylformamide, polymethyl methacrylate, silicon dioxide and titanium dioxide. The invention relates to a preparation method of a SiO2 / TiO2 / PMMA radiation refrigeration film. The preparation method comprises the steps of preparing silicon dioxide, preparing titanium dioxide, synthesizing composite sol and preparing the SiO2 / TiO2 / PMMA radiation refrigeration film. The SiO2 / TiO2 / PMMA radiation refrigeration film prepared by the invention has high reflectivity in the ultraviolet-visible-near infrared band and high emissivity in the infrared band, can realize 8.4 DEG C sub-environment refrigeration, and is low in cost and simple in process flow.

The invention discloses a high-power intermediate infrared fiber laser. The fiber laser is composed of a first pumping source, a second pumping source, a pumping beam combiner, a high-reflectivity fiber grating, a low erbium-doped fluoride fiber, a low-reflectivity fiber grating, a cladding light filter, a fiber end cap, a collimating lens and a dichroscope. The mode of combining erbium ion ground state transition achieved through fiber core pumping and erbium ion excited state transition achieved through cladding pumping is adopted, mid-infrared laser upper energy level particle number accumulation is obtained, and meanwhile laser lower energy level particles are effectively consumed through the cladding pumping transition process. And the population inversion state of the laser system is kept, and the particle circulation rate and the quantum efficiency from the pump light to the intermediate infrared laser are improved, so that the generation of high-power and high-efficiency intermediate infrared fiber laser is realized.

The invention discloses a passive radiation refrigeration coating and a preparation method thereof, and relates to the technical field of industrial coatings. Comprising a fluoroacrylate emulsion, hollow glass beads, nano titanium dioxide, flaky silicon dioxide aerogel powder, polytetrafluoroethylene micro powder, hydroxyl-terminated polydimethylsiloxane, a hydroxyl acrylic acid modified silane coupling agent, a super-hydrophobic modified fluorosilicone surface additive, nano cerium oxide, aluminum fluoride doped zinc oxide infrared enhancement powder and deionized water. The paint is prepared on the basis of the formula. According to the invention, a multi-scale spectrum regulation and control and surface self-cleaning system is constructed cooperatively, so that the synergistic effect of high reflection of a sunlight region and high emission of a middle infrared region is realized. The coating can maintain continuous passive refrigeration in a day and night period, the surface of the coating has self-cleaning capability and excellent ultraviolet aging resistance, and high reflectivity and high radiation emissivity can be maintained for a long time in a complex outdoor environment, so that the thermal management efficiency of buildings and equipment is remarkably improved.

The invention provides a reflective thermal insulation coating based on three-dimensional porous resin as well as a preparation method and application of the reflective thermal insulation coating. The coating is prepared from the following raw materials in parts by weight: 15 to 60 parts of polymer resin emulsion, 1 to 15 parts of good solvent, 1 to 15 parts of poor solvent, 5 to 15 parts of reflective filler, 2 to 5 parts of nano kaolin and 1 to 5 parts of silicon dioxide aerogel. The reflective filler is hollow glass microspheres jointly modified by a silane coupling agent and titanium n-butoxide. The chemical reaction between the silane coupling agent and the surfaces of the glass microspheres can enhance the binding force between the silane coupling agent and the resin matrix, and avoids the problems of aggregation and sedimentation in the coating, thereby improving the uniformity and stability of the coating. Meanwhile, titanium n-butoxide is introduced, a TiO2 coating layer is generated through a hydrolysis reaction, heat can be effectively reflected through the high reflectivity of TiO2, heat absorption of the coating is reduced, and the heat insulation effect is improved. Therefore, the double-modified hollow glass microspheres can play a better heat insulation role in the coating, and the overall heat insulation efficiency of the coating is improved.

The invention discloses a reflective steel pipe weld defect identification method based on a multimode spectrum chromatography technology, and provides a detection process of multiband reflection data acquisition, denoising and normalization, multi-region feature distribution modeling, sparse reconstruction separation abnormal response, multi-scale contrast weighted enhancement, significant layered imaging and defect classification and discrimination. According to the method, through the measures of automatic partitioning, environment and material dynamic acquisition, self-adaptive parameter optimization and the like, high-reflection interference is effectively suppressed, the distinguishing between defects and backgrounds is remarkably enhanced, and the detection sensitivity and the positioning precision of the small and micro defects are improved.

The invention provides a circuit board and a preparation method thereof and a backlight module, the circuit board comprises a circuit substrate and a reflection structure layer located on at least one surface of the circuit substrate, the reflection structure layer covers at least part of a circuit layer of the circuit substrate, and the reflection structure layer comprises a reflection layer and a transparent photosensitive layer which are sequentially stacked on the surface of the circuit substrate. The transparent photosensitive layer covers the outer surface of the reflecting layer. According to the circuit board provided by the invention, the surface of the reflecting layer is coated with the transparent photosensitive layer, so that the thickness and flatness of the reflecting structure layer can be improved, the light loss is reduced, the reflectivity and uniformity are improved, the lateral erosion size of the bottom of the reflecting layer is reduced, and the risk that the reflecting layer falls off is reduced.

The invention provides high-reflectivity coated glass and a preparation method thereof. The high-reflectivity coated glass comprises a glass substrate, and an antioxidant dielectric layer, a reinforced dielectric layer, a metal layer and an outer dielectric layer which are sequentially arranged on the glass substrate, and the reinforced dielectric layer comprises a first dielectric layer and a second dielectric layer which are arranged in sequence. According to the coated glass provided by the invention, through specific dielectric layer structure combination, the reflectivity of the coated glass is improved, the transmittance is reduced, and the coated glass has good oxidation resistance, scratch resistance and heat-resistant processability, is simple in preparation process and has a wide application prospect.

Disclosed are a micro-display chip and a preparation method thereof. The micro-display chip includes: a self-luminescence layer, a wavelength conversion layer, and a first transmitting-and-reflecting layer and / or a second transmitting-and-reflecting layer; the first transmitting-and-reflecting layer is disposed between the self-luminescence layer and the wavelength conversion layer; the second transmitting-and-reflecting layer is disposed on another surface of the wavelength conversion layer; the first transmitting-and-reflecting layer has low reflectivity and high transmissivity for the first color light and high reflectivity and low transmissivity for the second color light, and the second transmitting-and-reflecting layer has high reflectivity and low transmissivity for the first color light and low reflectivity and high transmissivity for the second color light. The micro-display chip of the present disclosure can effectively improve the absorbance and color purity of conversion light, thereby obtaining a brighter and purer conversion spectrum.

The invention belongs to the field of composite materials, and particularly relates to a nanofiber radiation refrigeration heat insulation film with a bionic multilayer structure. The device sequentially comprises a bionic anti-reflection layer, a solar spectrum reflection layer, a nanofiber porous heat insulation layer and an atmospheric window radiation layer from outside to inside, the bionic anti-reflection layer is a sub-wavelength nano bulge array simulating a moth eye structure and is formed on the outer surface of the solar spectrum reflecting layer; the solar spectrum reflecting layer is a polymer film doped with high-reflectivity nanoparticles; the nanofiber porous heat insulation layer is a porous membrane formed by interweaving polymer nanofibers prepared by an electrostatic spinning technology; the atmospheric window radiation layer is a functional layer formed by coating or blending high-emissivity inorganic nanoparticles on the inner surface of the nanofiber porous heat insulation layer; the film integrates bionic antireflection, high sunlight reflection, efficient heat radiation and physical heat insulation, and efficient, stable and flexible daytime radiation refrigeration is achieved.

The invention provides a preparation method of a surface structure of a back contact battery, which relates to the technical field of back contact batteries, and comprises the following steps: S1, carrying out double-sided polishing on the surface of a silicon wafer: firstly carrying out rough polishing, removing a damaged layer on the surface of the silicon wafer, then cleaning with acid and ozone, then carrying out fine polishing, then cleaning with a mixed solution of hydrogen peroxide and alkali, and then carrying out acid pickling with ozone, then cleaning with a mixed solution of acid and hydrogen peroxide, and finally washing and drying; sequentially depositing a tunneling oxide layer and amorphous silicon on a single surface at high temperature; and performing high-temperature diffusion on the surface to form a crystallized first semiconductor region and a mask layer BSG. According to the invention, the specific suede structure is formed on the front surface, and the polished surface is formed on the back isolation base region, so that high reflectivity of the back isolation base region is ensured, the specific suede structure on the front surface can be independently designed, and meanwhile, a double-surface ozone oxidation process is added; therefore, the open-circuit voltage and the short-circuit current of the cell are improved, and the photoelectric conversion efficiency of the cell is improved.

The invention provides a radiation refrigeration plate combining a sky radiation refrigeration material and a plate heat exchanger, and relates to the technical field of refrigeration, the radiation refrigeration plate comprises a sky radiation refrigeration material layer, a plate heat exchanger assembly, a fan cover layer and a heat insulation material layer, the sky radiation refrigeration material layer has high reflectivity in a solar spectrum wave band and has high emissivity in an atmospheric window wave band, and the plate heat exchanger assembly has high reflectivity in a heat insulation material layer; and heat can be efficiently radiated to the outer space. The plate heat exchanger assembly comprises an enhanced heat exchange tube and a nanofluid, and the nanofluid is filled in the enhanced heat exchange tube and used for heat transfer and transport capacity and enhancing the heat exchange effect. And the fan cover covers the sky radiation refrigeration material. The heat insulation material layer is laid on the portion, except the top face, of the radiation refrigeration plate so as to reduce heat loss of the system to the surrounding environment, and the refrigeration effect is guaranteed. By means of the structure, working modes in the daytime and at night are achieved, the heat transfer efficiency of the system is greatly improved, energy consumption is reduced, and the efficient radiation refrigeration effect of all-weather continuous operation at the temperature lower than the environment temperature is achieved.

The present invention relates to the technical field of reflective film and discloses a reflective film for photovoltaic use and a preparation method thereof. The present invention prepares a four-layer composite structure, namely a protective layer, a reflective layer, a base layer, and an adhesive layer. Each layer is bonded together by a hot pressing composite process. Each layer has insulating properties. In addition, a modified EVA adhesive layer is used as a bottom functional layer, which has both strong adhesiveness and insulating properties. The prepared reflective film has excellent insulating properties, weather resistance, and high reflectivity, and has great application value in the field of photovoltaic reflective film.

The invention relates to the technical field of thermal protection coatings, and discloses a high-reflection thermal protection coating and a preparation method thereof.LSTN0.125 powder is subjected to spray granulation and then pre-sintered and sieved, and spherical LSTN0.125 ceramic powder is obtained; the alloy substrate is subjected to roughening treatment, and a bonding layer is prepared on the surface of the alloy substrate through the atmosphere plasma spraying technology; the spherical LSTN0.125 ceramic powder obtained in the step S1 is sprayed on the bonding layer through the atmosphere plasma spraying technology, and an LSTN0.125 ceramic layer is obtained; and the LSTN0.125 ceramic layer is subjected to heat treatment, and the LSTN0.125 thermal protection coating is obtained. According to the invention, the LSTN0.125 with high reflectivity is used as a powder raw material of the coating, so that the high reflection performance of the coating in a near-infrared band can be remarkably enhanced, and the effect of isolating high temperature is achieved.

The invention relates to a high-reflection-high-emissivity radiation refrigeration coating for power equipment and a preparation method of the high-reflection-high-emissivity radiation refrigeration coating. The coating comprises deionized water, styrene-acrylic emulsion, titanium dioxide, hollow glass beads, zinc oxide, hexacyclic stone powder, a dispersing agent, a defoaming agent, a coalescing agent and a mildew preventive, and mica powder, calcined kaolin, talcum powder, silicon oxide micro powder or block copolymer emulsion can be optionally added. According to the coating, the synergistic effect of various infrared functional fillers and an emulsion matrix is optimized, so that high reflection of sunlight and high emission of middle and far infrared bands are realized. The coating has excellent cooling capacity, self-cleaning performance and environmental adaptability.

The invention provides a surface-emitting gallium nitride VCSEL laser chip and an epitaxial defect suppression preparation method thereof, and relates to the technical field of laser chips, the surface-emitting gallium nitride VCSEL laser chip comprises a substrate, a low-temperature nucleating layer, a high-temperature recovery layer, a stress regulation type nano mask composite defect blocking layer, an n-type nitride DBR reflector, an active region, a polarization enhanced tunnel junction and the like, the defect blocking layer adopts an in-situ silicon nitride nano-porous mask layer to be matched with an aluminum gallium nitride / gallium nitride stress compensation superlattice layer, through pulse type lateral epitaxial overgrowth annihilation penetrating dislocation, and the n-type nitride DBR reflector adopts an AlInN / GaN lattice matching material system to be combined with a hydrogen etching interruption modification technology, so that thick film growth with zero cracks and high reflectivity is realized; a polarization enhanced tunneling junction is used at the top to replace ITO, and the hole tunneling probability is enhanced by piezoelectric polarization in InGaN, so that efficient current injection with low working voltage and no absorption loss is realized, the dislocation density and the device voltage are remarkably reduced, and the yield of an epitaxial wafer and the photoelectric conversion efficiency are improved.

The invention discloses a dynamic self-adaptive radiation refrigeration material which comprises the following components in percentage by mass: 15-30% of matrix resin, 40-60% of a ternary function system, 1-3% of a dispersing agent, 2-5% of a cross-linking agent and the balance of deionized water, the ternary function system is composed of a temperature-sensitive block copolymer, phase change microcapsules and rare earth doped infrared emission particles according to the mass ratio of (1-2): (2-3): (1-1.5). According to the refrigeration material, when the environment temperature is higher than the low critical solution temperature of the temperature-sensitive copolymer, the temperature-sensitive chain segment shrinks to expose the rare earth particles, so that high reflectivity of sunlight and high emissivity of an atmospheric window are realized, and refrigeration is enhanced; when the temperature is lower than the phase-change temperature of the phase-change material, the temperature-sensitive chain segments stretch and wrap the rare earth particles, the infrared emissivity is reduced, heat loss is reduced through phase-change heat release, the dual functions of efficient refrigeration in summer and heat loss reduction in winter are achieved, and the applicability of the coating in an area with the large temperature difference is improved.

The invention provides a preparation method of a super-amphiphobic high-reflection coating, and relates to the technical field of self-cleaning materials. A one-step method is adopted, and the core is to prepare functional super-amphiphobic particles with micro-nano structures. A micro-nano composite structure is constructed by a method of regrowing silicon dioxide on the surfaces of micron-scale barium sulfate, titanium dioxide or calcium carbonate particles, and then surface modification is performed to prepare the super-amphiphobic particles. And mixing the prepared particles with a water-based emulsion, alcohol-soluble or ester-soluble resin, a coalescing agent, a defoaming agent, a wetting leveling agent and an adhesive according to a certain ratio to prepare the coating. And finally, a coating with high reflectivity and super-amphiphobic performance is formed on the surface of the substrate, so that the contact angle of water drops and oil drops on the surface of the material is greater than 150 degrees.

A first pumping source and a second pumping source are combined through a pumping beam combiner and are coupled into an erbium-doped fluoride fiber and a high-reflectivity fiber bragg grating, and the erbium-doped fluoride fiber and a low-reflectivity fiber bragg grating form a laser resonant cavity. The intermediate infrared laser is output through the low-reflectivity fiber bragg grating, the cladding light filter and the optical fiber end cap; the high-reflectivity fiber bragg grating and the low-reflectivity fiber bragg grating have the same grating period, the fourth-order harmonic reflection wavelength of the grating is located in the emission spectrum range of transition of erbium ions from the 4F9 / 2 energy level to the 4I9 / 2 energy level, and the fifth-order harmonic reflection wavelength of the grating is located in the emission spectrum range of transition of erbium ions from the 4I11 / 2 energy level to the 4I13 / 2 energy level; by adjusting the power of the first pumping source and the second pumping source, the net gain of laser transitions from the 4F9 / 2 energy level to the 4I9 / 2 energy level and transitions from the 4I11 / 2 energy level to the 4I13 / 2 energy level is regulated and controlled, and switching of laser working wavelengths is achieved.

A pumping module of a VCSEL side-pumped solid-state laser and a corresponding solid-state laser. The pumping module uses a design of pumping in an even number of directions, achieves a symmetrical pumping cavity and a mutual reflection chamber, and improves pumping light distribution uniformity. By means of the high reflectivity characteristic of surfaces of VCSEL chips (2) and a packaging substrate and a heat sink (1) therefor, a design in which no independent reflection chamber is provided and the heat sink (1) is integrated is realized, the structure is simplified, and the symmetry of light spots is improved. In addition, a cooling pipe (4) having a frosted outer surface is introduced, so that the uniformity of light beams is further improved by means of a diffusion mechanism, and reflection on the surfaces of the VCSEL chips (2) is used to compensate for possible loss, thereby ensuring that optical-to-optical efficiency is almost unchanged. By using an eccentric pumping structure and an optimized wavelength distribution of the VCSEL chips (2), the absorption uniformity of a crystal rod (200) is further improved; and the uniformity of light beams can be effectively improved, especially when the diameter of the crystal rod (200) is large. The present invention has the advantages of a simple structure, stable performance and good light spot symmetry.

The invention relates to a monolithic integrated photoelectric detection semiconductor device, and belongs to the technical field of semiconductors. The laser comprises an N-surface electrode, an N-type substrate, and a photoelectric detector, a DBR laser and a semiconductor laser which are formed on the N-type substrate, are all of a laminated structure, and sequentially comprise a buffer layer, a grating layer, a spacer layer, an N-type limiting layer, an active layer, a P-type limiting layer, a P-type cover layer, an ohmic contact layer and a P-surface electrode from bottom to top. The DBR laser is located between the semiconductor laser and the photoelectric detector and serves as a high-reflectivity end face of the semiconductor laser, the photoelectric detector detects the optical power transmitted by the DBR laser, and monitoring of the output optical power of the semiconductor laser is achieved. The structure is also provided with an electrical isolation channel which is used for electrically isolating the photoelectric detector and the semiconductor laser. According to the invention, the influence of end face cleavage randomness is avoided, the single-mode yield is effectively improved, and the method is suitable for manufacturing a high-performance semiconductor laser.

The invention discloses a preparation method of copper-based composite powder with high infrared laser absorptivity and a reaction device of the copper-based composite powder, and belongs to the technical field of metal additive manufacturing. The preparation method of the copper-based composite powder comprises the following steps that copper powder is subjected to acid pickling pretreatment, Cu2O-coated Cu powder is prepared through air suspension dynamic etching, the Cu2O-coated Cu powder is purified, and the prepared composite powder is of a core-shell structure and comprises a copper core and a cuprous oxide modified shell wrapping the surface of the copper core; by means of the structure, the absorptivity of the copper powder to near-infrared laser of 1064 nm and the like can be remarkably improved to 30% or above, and therefore the problems that pure copper is poor in melting and multiple in forming defect due to high reflectivity in laser additive manufacturing are effectively solved. The composite powder can be directly used for existing selective laser melting or directional energy deposition equipment, has great significance in achieving high-density copper part forming under medium power, and is convenient to prepare, low in cost and high in practicability.

The invention provides an unmanned aerial vehicle inspection tour anti-dazzle visual angle optimization method and system based on background perception. Acquiring a key detection area of the inspection target; candidate shooting poses of the unmanned aerial vehicle are generated for the key detection area; constructing a glare risk function based on the material type parameters, the solar incident angle and the deviation angle between the camera observation direction and the mirror reflection direction; constructing a contrast scoring function based on the brightness corresponding to the background type and the reflection brightness corresponding to the key detection area; a target shooting position is selected according to the glare risk function and the contrast scoring function, and an unmanned aerial vehicle inspection track is generated; the shooting visual angle of the unmanned aerial vehicle is automatically selected and adjusted in a complex natural light environment, the image failure risk caused by high reflection, silhouette and low contrast is reduced, and the detectability of defects of key parts is improved.

The invention provides an infrared shielding flexible composite phase change film and a preparation method thereof. The composite phase change film is a flexible composite film material synthesized by taking a cellulose acetate porous film as a framework and a phase change material as a core material and doping a high-reflectivity nanoparticle material. The preparation method of the composite phase change membrane comprises the following steps: forming pores by a phase inversion method, carrying out gravity settling to obtain a cellulose acetate porous membrane with low emissivity, and dipping to obtain the flexible composite phase change membrane. The prepared flexible composite phase change film is a bendable film with certain mechanical strength, the system has the infrared emissivity reducing performance and the temperature control performance, and the composite phase change material under the dual-mode function can efficiently achieve the infrared shielding effect.

The application discloses a kind of low thermal conductivity high reflectivity five-element co-doped ceramic laser protection coating and preparation method thereof, belong to high-energy laser protection technical field.The protective coating includes the adhesive layer and the reflective heat insulation layer of laminated arrangement, adhesive layer is arranged on the surface of base material, reflective heat insulation layer is arranged on the surface of adhesive layer;Wherein, adhesive layer is formed by spraying one of Ni-Al self-bonding powder, Ni-Mo-Al, NiCrAlY, CoCrAlY and NiCoCrAlY;Reflective heat insulation layer is the ceramic coating of five-element co-doped ZrO2, in ceramic coating, base element is ZrO2, doping component is:Y2O3, Gd2O3, Yb2O3, TiO2 And Ta2O5, after doping, material is single cubic phase structure at 25 ℃-1600 ℃.By multiple oxide doping to ZrO2, the coating can maintain cubic phase at room temperature while having lower thermal conductivity and higher reflectivity, can solve the problems of oxidation reflectivity reduction of metal material, mass loss of ablation material and insufficient heat insulation capacity of heat insulation material in laser protection field, prolong service life.

The invention relates to a high-reflectivity high-entropy rare earth phosphate radiation refrigeration pigment, the high-entropy rare earth phosphate radiation refrigeration pigment has a monazite phase with a monoclinic system structure, the chemical formula of the pigment is (A1xA2yA3zA4uA5v) PO4, A1, A2, A3, A4 and A5 are any five rare earth cations of La, Ce, Yb, Gd, Nd and Eu, the cations are in an equimolar ratio, and x, y, z, u and v meet the condition that x + y + z + u + v = 2. Meanwhile, the invention also discloses a preparation method of the high-entropy rare earth phosphate radiation refrigeration pigment. The high-entropy rare earth phosphate radiation refrigeration pigment has high infrared emissivity in air, the emissivity reaches 0.90 or above within the wave band of 8-13 microns, the solar reflectivity reaches 0.93 or above within the wave band of 0.3-2.5 microns, and the high-entropy rare earth phosphate radiation refrigeration pigment has wide application prospects in the fields of building energy conservation, urban heat island effect reduction, photovoltaic power generation efficiency improvement and the like.

The invention relates to the technical field of reflective films, and discloses a photovoltaic reflective film and a preparation method thereof.The photovoltaic reflective film is of a four-layer composite structure, namely a protective layer, a reflective layer, a base layer and a bonding layer, all the layers are bonded through a hot-pressing composite technology and have insulation performance, the modified EVA bonding layer serves as a bottom functional layer, and the protective layer, the reflective layer, the base layer and the bonding layer are bonded through a hot-pressing composite technology. The prepared reflective film has the functions of high adhesion and insulativity, has excellent insulativity, weather resistance and high reflectivity, and has great application value in the field of photovoltaic reflective films.

The invention provides a welding seam parameter anti-interference measurement method, which comprises the following steps of: acquiring spectrum characteristics of a high-reflectivity surface through a laser scattering technology and Fourier transform processing, matching a correction coefficient, realizing weighted adjustment and geometric parameter extraction of a scattering signal, accurately quantifying a groove size in combination with an edge enhancement algorithm and a three-dimensional contour modeling technology, and accurately measuring the welding seam parameters. Interference such as surface oil stain, corrosion and stripe fracture is effectively overcome by using image filtering, morphological reconstruction and an abnormal value elimination algorithm, and finally, high-precision and anti-interference measurement of the weld groove angle, the truncated edge thickness and the assembly alignment tolerance under high-reflection, corrosion and complex working conditions is realized through multi-source data fusion and self-adaptive calculation range adjustment. And the reliability and the automation level of welding quality detection are remarkably improved.