19results about How to "Good reflective properties" patented technology

The invention discloses electromagnetic shielding aerogel with a double-layer structure and a preparation method of the electromagnetic shielding aerogel, the electromagnetic shielding aerogel is composed of cellulose nanofibers, hollow cobalt nickel carbon nanocages and few-layer MXene, and the electromagnetic shielding aerogel is of the double-layer structure. The electromagnetic shielding aerogel not only has excellent kilomegahertz shielding efficiency with low reflection characteristic, but also has great application potential in the fields of lightweight multifunctional electromagnetic shielding composite materials, special electromagnetic protection facilities, electromagnetic stealth materials, severe environment resistant electronic equipment and the like.

The invention relates to the technical field of reflective coatings, in particular to a facade reflective coating formula, a preparation method and a preparation device.The facade reflective coating formula is prepared from 30-40 parts of epoxy resin, 15-20 parts of glass beads, 10-12 parts of ceramic beads, 6-8 parts of titanium dioxide, 1-2 parts of a polycarboxylate dispersing agent, 0.5-1 part of an organic silicon defoaming agent, 1-2 parts of a hydroxyethyl cellulose thickening agent and 1-2 parts of a silane coupling agent. The facade coating can firmly bond glass bead and ceramic bead reflective materials to form a compact paint film, the reflective characteristic is excellent, the boundary of an object can be clearly marked at night, and the visibility and safety of the object are greatly improved.

The invention relates to the field of thin film materials, and provides a patterned low-internal-stress high-reflection layer and a preparation method and application thereof, and the high-reflection layer comprises an n (Si / Ni) layer, a Cr layer, a cap layer and a patterned reflection layer which are sequentially located on a gamma-Al2O3 substrate from bottom to top; the n (Si / Ni) layer is formed by alternately depositing a Si layer and a Ni layer for n periods, and the alternating period n is 30-60; the average thickness of the Si layer is 15-40 nm, the average thickness of the Ni layer is 3-8 nm, and the ratio of the average thickness of the Si layer to the average thickness of the Ni layer is 5: 1; the lowest layer of the n (Si / Ni) layer is a Si layer and is connected with the gamma-Al2O3 substrate, and the uppermost layer is a Ni layer. The multilayer composite structure design is adopted, high reflectivity, low internal stress, low defect density and chemical stability are achieved, the problems that a traditional high-reflection layer is large in internal stress, large in defect density and the like are solved, and the method can be applied to the fields of photoetching masks, optical imaging and sensors.

The invention belongs to the field of gold stamping detection, and provides a gold stamping detection device which comprises a detection table, transmission rollers are rotationally connected to the two ends of the interior of the detection table, a conveying belt is in transmission connection between the two transmission rollers, and a camera obscura is fixedly connected to the side face of the detection table through a second connecting rod. And an optical sensor is arranged at the inner top of the camera obscura. According to the gold stamping machine, the optical sensor is arranged, when the placing plate moves into the camera obscura, the optical sensor can accurately detect the color, the shape and the size of gold stamping and transmit a detection result into the processor, and the processor judges whether gold stamping is qualified or not, so that the accuracy of the detection result is greatly improved, and the influence of artificial factors is avoided; in the packaging and dust removing process, the conveying belt still drives other containing assemblies to move, and compared with the existing technology that the conveying belt stops moving and then dust removing is conducted, the device does not need to stop working, and the working efficiency is improved.

In the present disclosure, provided is a reflection structure having a frequency selective reflection plate that reflects an electromagnetic wave of a specific frequency band in a direction different from a regular reflection direction, the reflection structure comprising: a substrate having a first alignment mark; and a plurality of the frequency selective reflecting plates arranged side by side on one surface of the base material, the distance between adjacent frequency selective reflecting plates being less than 1 / 2 of the wavelength of the electromagnetic wave.

The invention relates to a Dewar nickel-based thin-wall cold shield for a refrigeration type infrared detector with heat conduction enhanced by a multilayer composite coating material on the surface and a preparation method of the Dewar nickel-based thin-wall cold shield, and belongs to the technical field of refrigeration type infrared detectors. The method comprises the following steps: loading a nickel-based thin-wall cold shield of which the inner surface is blackened into an electron beam evaporation coating clamp; carrying out high vacuum pumping on the electron beam evaporation coating equipment; when the vacuum degree of the electron beam evaporation coating equipment is greater than 1 * 10 <-3 > Pa, baking the surface of the thin-wall cold shield to be coated at 200 DEG C; when the vacuum degree of the electron beam evaporation coating equipment is greater than 5 * 10 <-4 > Pa, carrying out argon plasma cleaning treatment on the cold shield; a nickel adhesion layer, a copper heat conduction layer and a silver heat conduction layer are sequentially plated on the surface of the cold shield; on the basis of keeping the mechanical property and thermodynamic property of the nickel-based thin-wall cold shield unchanged, the thermal mass of the Dewar cold head is not obviously increased, the heat conduction property of the cold shield can be obviously enhanced, the heat transfer is accelerated, and the quick start of the refrigeration type infrared detector is realized.

The present invention relates to the field of thin film materials, and provides a patterned low internal stress high reflective layer and a preparation method and application thereof, wherein the high reflective layer comprises γ-Al 2 O 3 n(Si / Ni) layer, Cr layer, cap layer, and patterned reflective layer on the substrate; the n(Si / Ni) layer is composed of n cycles of Si layer and Ni layer alternately deposited, and the alternating cycle n is 30-60; the average thickness of the Si layer is 15-40nm, the average thickness of the Ni layer is 3-8nm, and the average thickness ratio of the Si layer to the Ni layer is 5:1; the bottom layer of the n(Si / Ni) layer is a Si layer and is adjacent to the γ-Al 2 O 3 The substrate is connected, and the top layer is a Ni layer. The present invention adopts a multi-layer composite structure design to achieve high reflectivity, low internal stress, low defect density and chemical stability, solving the problems of high internal stress and high defect density in traditional high reflective layers, and can be applied to photolithography masks, optical imaging and sensor fields.

The invention relates to a durable road marking paint and a preparation method thereof, and belongs to the technical field of paints.The durable road marking paint is prepared from a component A and a component B. The mass ratio of the component A to the component B is (4-5): (95-96), the component A is prepared from, by mass, 15-30 parts of polyvinyl chloride, 15-20 parts of styrene-acrylic resin, 5-10 parts of acrylonitrile-butadiene-styrene copolymer and 5-10 parts of polyetherimide; 20 to 30 parts of a silane coupling agent and 15 to 30 parts of polyether modified organic silicon; and the component B comprises 10-15 parts of petroleum resin, 5-10 parts of polytetrafluoroethylene, 5-8 parts of rutile titanium dioxide, 38-42 parts of superfine calcium carbonate powder, 5-10 parts of nano spherical silica powder and 18-20 parts of reflective glass beads. The durability of the road marking paint can be improved, the overall reflective performance of the material can be improved, and the service life of the road marking can be prolonged.

The utility model provides a kind of adjustable handheld high-efficiency infrared heating device of quick solidification, comprising: support plate, control system is equipped on it, control system includes the temperature controller of being equipped on support plate upper surface, and infrared radiation plate is equipped on support plate lower surface, temperature controller and infrared radiation plate signal connection, support plate vertical direction both ends are respectively rotationally equipped with one screw rod;Light-gathering sheet, be equipped on the lower surface both sides of support plate, screw rod is unfolded when rotating along support plate for light-gathering sheet, two light-gathering sheets corresponding face are equipped with infrared reflective paint, infrared reflective paint is used to gather the light source generated by infrared radiation plate.This application has rotating plate and can be folded down or up to fit support plate, greatly reduce overall volume, improve the compactness and portability of equipment;Surface is evenly coated with a layer of high reflectivity infrared reflective paint, the coating has high reflection characteristics to mid-wave or long-wave infrared.

The present application relates to the technical field of photovoltaic modules, and provides a tunable passive refrigeration photovoltaic module, which comprises a passive radiation refrigeration layer, one or more sub-layers of which are stacked, at least one of the sub-layers in the passive radiation refrigeration layer being a radiation refrigeration function sub-layer; a photovoltaic cell unit layer; an encapsulation layer, which comprises a base resin and a filler doped in the base resin; the passive radiation refrigeration layer, the photovoltaic cell unit layer and the encapsulation layer are sequentially stacked from top to bottom and connected with each other. The above configuration radiates the heat inside the photovoltaic module outward through the radiation refrigeration function without additional energy consumption, so as to reduce the temperature of the photovoltaic module. Meanwhile, the encapsulation layer can efficiently reflect light of a specific spectrum, so that the color appearance of the photovoltaic module can be realized without increasing the temperature rise, and the utilization efficiency of light and the photoelectric conversion efficiency of the cell are further improved.

This application provides a positioning antenna, relating to the field of positioning technology, including a circuit board and a motherboard. Multiple antennas, all omnidirectional, are mounted on the circuit board and connected to the motherboard. The antennas are positioned perpendicular to the circuit board, with their vertical height being one-quarter of the UWB center frequency. This omnidirectional antenna configuration enables 360-degree omnidirectional signal reception. Furthermore, by setting the antenna's vertical height (H) to one-quarter of the UWB center frequency, the positioning antenna achieves optimal reflection characteristics and impedance matching, improving its radiation efficiency and reception performance. It also enhances the antenna's anti-interference capability, thus improving its overall performance. This application further separates the antenna from the motherboard via the circuit board, enabling a modular design and compatibility with various motherboards for application in diverse scenarios.

The invention relates to the technical field of semiconductor processing, in particular to a preparation method of a wafer surface register mark and a metal register mark, a layer of peelable photoresist mask is prepared on the surface of a wafer through spin coating, exposure and development, a light-transmitting area pattern of the mask corresponds to a to-be-registered mark, and then the to-be-registered mark is obtained through a metal stripping process. According to the method, a layer of metal is firstly grown on the wafer, the photoresist mask and the metal growing on the photoresist mask are stripped to form the metal register mark, and the register mark is protected by the metal, so that the register mark is more durable and is not easily damaged by chemical and physical processes, the completeness of the register mark in the subsequent process is ensured, and the reduction of the overlay precision is avoided.

The invention discloses a method for forming textures on the surface of a product by using purple laser, which relates to the technical field of clothing accessory manufacturing and comprises two main steps of material preparation and pretreatment and purple laser marking. Nanoscale powder (such as silver powder and silicon dioxide powder) is added into basic materials such as vulcanized silica gel for pretreatment, then marking is conducted through a purple light laser marking machine according to a designed pattern, and a clear and colorful texture pattern is successfully formed on the surface of a product; in addition, an environment-friendly additive (such as a biodegradable additive, a halogen-free flame-retardant additive and the like) is further introduced, so that the environment-friendly performance of the product is improved, and waste and energy consumption in the production process is reduced. According to the method, the laser marking efficiency and quality are improved, the unique visual effect is added to products, the method is suitable for various basic materials, personalized pattern design can be conducted according to customer requirements, and the obvious technical innovation and environmental protection advantages are achieved.

The invention relates to the technical field of thermal control in a space environment, in particular to a heat dissipation module and a heat dissipation system, the heat dissipation module comprises a body and a flow channel adapter tube, the body comprises a transparent packaging layer and a first reflecting layer, a micro flow channel is formed in the body, the first reflecting layer covers the inner surface of the micro flow channel, and the first reflecting layer covers the inner surface of the micro flow channel. The heat dissipation module is further provided with a contact surface, the contact surface is used for making contact with heat production equipment, the micro-channel is arranged close to the contact surface, and the end of the micro-channel is connected with the channel adapter tube. The invention aims to provide a heat dissipation module and a heat dissipation system for at least one technical problem related in the prior art.

The invention belongs to the field of frequency selective surface (FSS) design, and particularly provides a dual-polarization frequency selective surface with a high angle stability characteristic, which is formed by periodically arranging M * N unit structures, each unit structure comprises a first metal patch layer T1, a first foam structure layer P1, a second metal patch layer T2, a first dielectric structure layer J1, a third metal patch layer T3, a second dielectric structure layer J2, a fourth metal patch layer T4, a second foam structure layer P2 and a fifth metal patch layer T5 which are sequentially stacked from top to bottom. Wherein T1 and T5 are completely identical, T2 and T4 are completely identical, P1 and P2 are completely identical, and J1 and J2 are completely identical; through the creative design of the unit structure, the frequency selective surface has a wide passband and low insertion loss wave transmission when electromagnetic waves are incident at a large angle, and the working frequency and bandwidth of TE and TM polarized electromagnetic waves can be independently regulated and controlled.

The invention discloses a cholesteric liquid crystal and polymer composite system film and a preparation method thereof, and belongs to the field of flexible liquid crystal display, and the method comprises the following steps: by taking a liquid crystal polymerizable monomer / chiral agent / photoinitiator as a main body, forming PDLC (Polymer Dispersed Liquid Crystal) by adding micromolecular nematic liquid crystal into the main body; and ultraviolet curing is performed to obtain the cholesteric liquid crystal and polymer composite system film with the micromolecular liquid crystal anchored by the polymerization network. According to the cholesteric liquid crystal film, an internal system is fixed through a polymer network, the reflectivity of the film is improved through small-molecule liquid crystals, the mechanical and optical performance of the liquid crystal film is optimized, and the cholesteric liquid crystal film is suitable for flexible display.

This application belongs to the field of medical device technology and relates to a scanning rod, comprising: a rod body, which includes a first rod segment, a second rod segment, and a third rod segment connected sequentially; one side of the first rod segment has at least one polygonal protrusion, and the top of the polygonal protrusion has at least one identification object for scanning by an external scanning head; the identification objects on the first rod segment have a unique corresponding coding combination; the coding combination includes the number, shape, and placement position of the identification objects on the first rod segment, or a combination of the three; or, the first rod segment includes a first region and a second region, and the coding combination includes the number, shape, and placement position of the identification objects in the first and second regions, or a combination of the three. The technical solution provided by this application enables unified management and rapid positioning in actual operation, facilitating rapid and efficient panoramic scanning within a limited field of view.

This utility model discloses a color-reflective high-strength PVC sheet, relating to the field of PVC sheets. It includes a PVC substrate layer, with a color-reflective composite layer for reflecting colors disposed on one side of the PVC substrate layer. The color-reflective composite layer comprises a primer layer, a colored pigment layer, and a reflective layer stacked sequentially. A reinforcing layer for increasing the strength of the PVC substrate layer is disposed on the other side of the PVC substrate layer. This color-reflective high-strength PVC sheet, by incorporating the color-reflective composite layer composed of a primer layer, a colored pigment layer, and a reflective layer, allows for the formulation of a rich variety of colors to meet diverse decorative design needs. It enhances light reflection performance, making it suitable for applications requiring light reflection. Simultaneously, the reinforcing layer, while ensuring lightweight construction, enhances the sheet's tensile, bending, and impact resistance, reduces surface wear, and extends its service life, enabling it to adapt to more complex usage environments.

The utility model discloses a kind of reflector for backlight module, it is characterized by, comprising: substrate, the substrate has the reflecting surface for reflecting light, the reflecting surface has enclosed peripheral boundary;And functional layer, the functional layer is located in the reflecting surface of the substrate, and the functional layer includes fluorescent powder;Wherein, the functional layer is the non-continuous layer formed by multiple functional points, and the distribution of the functional point is gradually diffused from the peripheral boundary start inwards, the distribution density of the functional point is gradually reduced from the peripheral boundary start inwards. Using the above technical solution, the edge dark area problem of existing backlight module can be improved.