13 results about "Periodic microstructure" patented technology

The invention discloses a hollow anti-resonance optical fiber with a large mode field area and ultralow loss in a middle infrared band. The cross section structure is composed of a central pentagonal hollow core area, a peripheral glass sheet connected coaxial semicircular nested pipe cladding and an outer cladding sleeve. The hollow core is an air channel with a pentagonal outline and is used for realizing the propagation of light in a low-loss medium; the cladding is composed of five symmetrically-distributed coaxial semicircular nested tube units, each unit comprises an inner semicircular arc glass sleeve and an outer semicircular arc glass sleeve which are connected by glass sheets to form a connected structure, and an anti-resonance boundary with a periodic microstructure is formed. According to the structure, the size of an air hole, the thickness of a glass wall, the radius ratio of two layers of semi-circular arcs and geometric symmetry are accurately regulated and controlled, and light of a specific wave band is limited in the hollow core through the anti-resonance effect. The invention realizes ultralow transmission loss, large mode field area and high nonlinear threshold, and is suitable for the application fields of mid-infrared laser transmission, gas sensing, spectral analysis and the like.

The invention relates to the technical field of glass, in particular to a high-flatness surface treatment process and application of ultrathin electronic glass. The method is suitable for the lithium aluminum silicate glass substrate with the thickness of less than or equal to 0.1 mm. Nondestructive cleaning pretreatment is realized through supercritical CO2 cleaning; a periodic microstructure processed by femtosecond laser is constructed in the non-display area to regulate and control thermal stress and inhibit warping; carrying out nanoscale leveling on the display area by adopting magneto-rheological polishing; then carrying out two-stage plasma etching, finishing the surface and carrying out hydroxylation; secondly, a 2-5 nm ZnO interface modification layer is deposited through ALD, and ITO nucleation and orientation are regulated and controlled; and finally, carrying out ITO magnetron sputtering and combining two sections of rapid annealing to obtain the conductive glass with the sheet resistance of less than or equal to 18 omega / square and the microcrack density of less than 0.5 / cm < 2 >. The process effectively solves the problems of low strength, large warping and interface defects caused by ultra-thinness.

The invention relates to the technical field of microwaves and millimeter waves, in particular to a substrate integrated slow wave waveguide structure and a design method thereof, the structure comprises an upper metal layer, a lower metal layer, a dielectric substrate arranged between the upper metal layer and the lower metal layer, and two rows of metalized through holes penetrating through the dielectric substrate and connecting the upper metal layer and the lower metal layer; a periodic microstructure unit array is arranged on the inner surface, facing the dielectric substrate, of the upper metal layer and / or the lower metal layer; the periodic microstructure unit array is used for being coupled with a quasi TE10 mode electromagnetic field transmitted in the waveguide structure to generate a slow wave effect, so that the phase velocity of electromagnetic waves is reduced in a preset working frequency band. The invention provides a substrate integrated slow-wave waveguide structure and a design method thereof, and aims to solve the technical problems that in the SIW technology, the physical size is large, miniaturization is difficult to achieve in a low-frequency band, high performance and low cost are difficult to consider at the same time, the design process depends on simulation, and the efficiency is not high.

The application discloses a quasi-periodic hierarchical structure topology optimization method based on an erosion-diffusion operator, and comprises the following steps: establishing a structure model; performing erosion-diffusion operation on a microstructure to obtain a quasi-periodic microstructure library; predicting the equivalent elastic tensor of the microstructure in the quasi-periodic microstructure library by using an asymptotic homogenization method; based on the obtained elastic modulus of the microstructure database, an explicit function relationship between the microstructure elastic modulus and the volume fraction is established by using a B-spline function fitting, and an optimization model is established; according to the optimization model, the sensitivity of the compliance function of the structure with respect to the two types of design variables, i.e., the macroscopic topological variable and the microscopic topological variable, is calculated; according to the obtained sensitivity information, the design variables are iteratively updated, and the collaborative optimization design of the microscopic unit density and the macroscopic unit density is completed; and the geometric model of the entire heterogeneous structure is obtained by reconstructing the macroscopic and microscopic optimization results of the optimization model.

This invention provides a method for preparing a glass panel and the glass panel itself, belonging to the field of glass panel processing technology. The method for preparing the glass panel includes the following steps: S1: Designing a film, designing a black area pattern on the emulsion surface of the film, the black area pattern being composed of periodically arranged microstructures; defining microstructure parameters, setting the shape, period, and height of each microstructure unit in the periodic microstructure; performing macroscopic pattern combination, dividing the periodic microstructure constituting the black area into one or more predetermined geometric units, and splicing and combining the geometric units to form the overall pattern on the film. The preparation method provided by this invention uses a process based on film design and UV exposure curing to prepare a refractive mold, resulting in lower glass panel preparation costs and precise microscopic control of the refractive effect, achieving diverse optical decorative effects.

The invention provides an optical film with an anti-fingerprint function and a preparation method thereof, and belongs to the technical field of optical film materials. The technical problem to be solved is that in the prior art, protection performance and optical performance are difficult to consider at the same time. According to the technical scheme for solving the technical problem, the nano-porous metal oxide coating comprises a base material, a micron-sized patterned primer layer is arranged on the surface of the base material, a periodic microstructure is arranged on the surface of the micron-sized patterned primer layer, and the side, close to the periodic microstructure, of the micron-sized patterned primer layer is covered with a nano-porous metal oxide layer. The micron-sized patterned primer layer and the nano-porous metal oxide layer form a graded micro-nano composite structure, and a low-surface-energy modification layer is arranged on the surface of the nano-porous metal oxide layer; the method is applied to the fields of high-end televisions, vehicle-mounted displays, tablet personal computers and the like.

This invention discloses a heat-insulating and electromagnetic shielding metasurface coating composite material for unmanned aerial vehicles (UAVs). By constructing an activated carbon fiber / alumina composite structure and combining it with metasurface micro / nano pattern design, hydroxypropyl methylcellulose is introduced into the composite system to achieve uniform dispersion of the activated carbon fibers and enhance interfacial bonding. A three-dimensional composite network is constructed using the high specific surface area of ​​the activated carbon fibers and the heat-insulating properties of alumina sol. Simultaneously, broadband electromagnetic absorption and shielding are controlled through the metasurface periodic microstructure. This invention addresses the problems of insufficient heat insulation performance under high-temperature environments, easy fiber agglomeration, poor mechanical stability, and limited electromagnetic shielding effectiveness in existing UAV composite materials. It meets the application requirements of UAVs for multifunctional integrated coating materials in complex electromagnetic environments and extreme high and low temperature conditions. The material prepared by this invention possesses high temperature resistance, high strength and toughness, and broadband electromagnetic absorption properties, making it suitable for complex aerospace environments.

The application provides a nonlinear optical crystal and a frequency converter for generating third harmonic laser, and belongs to the field of optical technology. The nonlinear optical crystal comprises a centrosymmetric nonlinear optical crystal, and a periodic microstructure composed of a plurality of amorphous regions and a plurality of single crystal regions is arranged in the nonlinear optical crystal along a light transmission direction of the crystal. The amorphous regions are phase control units, and the third-order nonlinear coefficient in each amorphous region is zero. The single crystal regions are laser frequency conversion units, and the third-order nonlinear coefficient in each single crystal region is not zero. The application can realize efficient and stable output of third harmonic laser.

The application discloses a filter spin coating preparation method, comprising: obtaining the electronic transition characteristic data and intermolecular force data of a precursor solution, determining the initial aggregation state parameters and intermolecular interaction intensity parameters of the precursor molecules; performing dielectric constant regulation treatment on the surface of a substrate to form a dielectric constant gradient distribution and a periodic microstructure; performing spin coating treatment on a functionalized substrate, applying an electric field, an acoustic field and a light field, and adjusting the field intensity and spatial distribution; obtaining the light intensity signal and polarized light detection signal of the film at different scattering angles, and analyzing the anisotropy characteristics of the scattering pattern; and adjusting the rotation speed, temperature field and air flow field according to the spatial distribution data of the molecular orientation, and obtaining the filter through temperature reduction and solidification. The technical scheme of the application obtains the initial state information of the precursor molecules through orthogonal double light path detection, dynamically regulates the molecular orientation by using the synergistic effect of multiple fields, combines real-time monitoring and feedback optimization, and realizes accurate control of the molecular arrangement.

The invention provides a long-acting stable super-lyophilic metal-based heat dissipation structure as well as a preparation method and application thereof. The heat dissipation structure comprises periodic micron structures uniformly distributed on the surface of a metal substrate and nano-morphologies densely distributed on the surfaces of the micron structures, the preparation method disclosed by the invention comprises the following steps of: etching a micron mastoid, a micron prism or a micron prismatic table by adopting laser, growing nanosheets, nanoparticles or nanowires through hot water digestion, and providing a hydrophilic chemical composition at the same time; the long-acting stable super-lyophilic property is obtained by means of the synergistic effect of the micron structure, the nanometer morphology and the lyophilic chemistry, the ultralow-0-degree contact angle is kept within at least half a year, and compared with a conventional smooth and flat surface, the contact thermal resistance is smaller, the specific surface area is larger, and the liquid cooling heat dissipation effect is better; the preparation method disclosed by the invention is low in cost, convenient to operate and simple in process, can realize precise and reliable regulation and control of the micro / nano structure, is suitable for large-scale production, is universally applicable to various metal substrates, and meets diversified heat dissipation application requirements in different fields.

The invention discloses a preparation method of a functional fabric and a knapsack assembled by the functional fabric, and belongs to the technical field of fabric preparation. A flexible continuous interface is constructed through PA latex, Cu2O antibacterial particles form a semi-embedded fixed structure, composite optical microspheres can be stably attached and orderly assembled, and the attachment firmness and surface functional activity of a functional layer are considered; through evaporation-induced self-assembly of the monodisperse composite optical microspheres, a periodic microstructure is formed on the surface of the fabric, so that a stable structural color is generated; a DA3261-dopamine conjugate and TPU are compounded and subjected to ultraviolet polymerization to form a temperature-sensitive layer, so that the outer surface of the knapsack has visual thermal response capability, the temperature-sensitive layer starts to have obvious color change at 35 DEG C and turns from bluish violet to amaranth at 40 DEG C, the comprehensive chromatic aberration delta E reaches 28.7, the delta E exceeds 30 at 45 DEG C or above, and the knapsack shows remarkable temperature early warning capability.

The invention discloses a manufacturing method of a copper-based halide microstructure linear array type scintillator and a detector. The detector is sequentially composed of a high-reflection coating, a copper-based halide scintillator array and a photodiode array in the ray direction. The scintillator is selected from Cs3Cu2I5, CsCu2I3 and the like and doping systems of Zn, Tl, Ce and the like, and a triangular, n-shaped or trapezoidal periodic microstructure array is prepared on the surface of the crystal; the microstructure linear array type scintillator can realize the spatial resolution greater than or equal to 6lp / mm. The linear array type scintillator is prepared by adopting a rotary furnace to dynamically synthesize a precursor in a solid phase, melting and growing the precursor in a graphite array mold, ultrasonically spraying a reflecting layer and then vacuum-coupling the precursor to a diode array, and the whole process is low in temperature, solvent-free and expandable. The detector has the advantages of high light output, low afterglow, high resolution and environmental friendliness, and meets the high-speed and low-dose requirements of security check, medical imaging and the like.

This invention relates to the field of lithium-ion battery technology, and more particularly to a periodic microstructured electrode based on microwave drying, its preparation method, and its application. By introducing standing wave vibration and selective microwave heating during the electrode slurry drying process, a controllable, periodic peak-valley microstructure is constructed on the electrode surface. Precise control of the microstructure is achieved by controlling the vibration frequency, power, and slurry coating thickness. The periodic peak-valley structure constructs short-range, directional, and highly interconnected ion transport channels within the electrode, improving the ion transport efficiency and electrochemical reaction uniformity of thick electrodes, reducing interfacial impedance, and achieving a synergistic breakthrough in high load and high rate performance, thus driving the development of high-energy-density batteries towards high-power-density.