67results about How to "Act as a reflection" patented technology

The invention relates to an etching apex non-doped intrinsic layer asymmetrical metal film vertical cavity surface emitting laser and a preparation method thereof. The invention comprises a Bragg reflector, a high resistive layer, an electrode, a substrate and a quantum well active region. The upper surface is etched with a round metal reflection film, a metal film lead, a contact layer of the metal film and an upper electrode and the upper electrode; the lower surface of the substrate is provided with the round metal reflection film, a lower surface metal film lead and a lower surface electrode. By introducing the non-doped intrinsic layer to etch the current aperture and combining the upper surface with the substrate surface to etch a metal film asymmetrical structure in order to implement the restriction to current and optical field, the invention has the efficacies of the electrode and the reflector of the metal film, simplifies a vertical cavity emitting laser array integration process, reduces the logarithm of distributed Bragg reflector, restricts the diffusion area of the current, improves the photoelectric coupling efficiency of injected current, avoids proton bombardment or respective oxidation process and is beneficial for integration as the intrinsic high-resistive layer and a chip implement the grown in one operation.

The invention provides a small beam-switchable antenna capable of conducting omni-directional scanning in an H face perpendicular to an antenna plane, belongs to the technical field of electronics, and particularly relates to a beam-switchable antenna technology with PIN diode switches. The antenna comprises a rectangular middle layer insulating substrate with a feed input port, patch vibrators arranged on the surface of the middle layer insulating substrate, a metal grounding plate arranged on the lower surface of the middle layer insulating substrate, four rectangular surface layer insulating substrates tightly attached to the upper surface and the lower surface of the middle layer insulating substrate, parasitic patches, the PIN diode switches and biasing circuits of control switches, wherein the parasitic patches, the PIN diode switches and the biasing circuits are arranged on the surfaces of the surface layer insulating substrates. Eight beam radiation directions are switches by controlling switching on and switching off of the control switches, and therefore omni-directional scanning in the vertical plane is achieved, the scanning dimension of the antenna is expanded to the plane perpendicular to the antenna from the plane where the antenna is located, the rough scanning method and the fine scanning method are achieved under two different working frequency bands, the application range of the antenna is widened, and different environment requirements can be met.

The invention belongs to the technical field of optical coating, and particularly relates to a solar control-low radiation type heat-insulation membrane system, which aims to provide the solar control-low radiation type heat-insulation membrane system capable of functioning in reflecting near infrared rays, middle infrared rays and far infrared rays. The membrane system comprises a PET layer (1), TiO2 layers (2), an Ag layer (3) and a Ti layer (4), wherein the PET layer (1) is a substrate; the first TiO2 layer (2) is covered on the PET layer; the Ag layer (3) is covered on the TiO2 layer (2); the Ti layer (4) is covered on the Ag layer (3); and the second TiO2 layer (2) is covered on the Ti layer (4). The solar control-low radiation type heat-insulation membrane type has low radiance, proper shading coefficient, the functions of sunshade and heat preservation and wide application, can function in reflecting the near, middle and far infrared rays and reduce the inflow and outflow of indoor heat, and is applied in summer, winter and hot and cold regions.

The invention relates to a high-performance agricultural greenhouse shed film. The high-performance agricultural greenhouse shed film comprises an outer layer, an intermediate layer and an inner layer, wherein the surface of the film is coated by surfactant coating liquid with a fog dispersal dripping function; the outer layer comprises 90-110 parts of LDPE (low-density polyethylene); the intermediate layer comprises 20-30 parts of LDPE, 65-75 parts of LLDPE (linear low density polyethylene) and an intermediate layer master batch of which the weight of diffusion powder accounts for 1-1.5 weight percent of the total mass of the intermediate layer; the inner layer comprises 20-25 parts of LDPE, 20-25 parts of LLDPE, 45-50 parts of MLLDPE (metallocene polyethylene) and a heat-preserving master batch which accounts for 10-15 weight percent of the total mass of the inner layer; the intermediate layer master batch comprises 87.8-93.75 parts of carrier resin, 5-10 parts of diffusion powder, 0.5-1 part of a light stabilizer, 0.7-1 part of an ultraviolet absorber, 0.5-1 part of an anti-oxidant and 0.05-0.1 part of a dispersing agent; the heat-preserving master batch comprises hydrotalcite and the LDPE, and the weight ratio of the hydrotalcite to the LDPE is 3:7; the LDPE of the outer layer is FB2230 low-density polyethylene which is produced by Borealis; the coating liquid is formed by diluting raw liquid and deionized water at a proportion of 1:(15-20). The aging life of the shed film reaches 1-3 years, the duration of fog dispersal dripping is 1-3 years, and crop growth is facilitated.

The invention relates to a waterproof LED lamp tube. A heat dissipating base comprises a mounting platform, protruding bars are arranged on the two sides of the mounting platform, and a groove used for mounting an LED substrate is formed among the two protruding bars and the platform. The top of each protruding bar extends inward to be provided with a first limiting plate, the top of each protruding bar extends outward to be provided with a second limiting plate, the top surfaces of the first limiting plates are provided with inclined surfaces inclining inward, and the top surfaces of the second limiting plates are provided with inclined surfaces inclining outward. LED chips are arranged linearly on the LED substrate. Guide grooves comprise inward first slide grooves and downward second slide grooves, the openings of the first slide grooves face outward, and the openings of the second slide grooves face upward. Guide bars comprise inward first slide bars and downward second slide bars, the first slide bars are matched with the first slide grooves, and the second slide bars are matched with the second slide grooves. The surfaces of the second limiting plates are smooth and can have the reflection effect, thus, light on the side face of a lampshade can be reflected to the bottom of the side face of the lampshade, and the lampshade can made to emit light more evenly.

The invention provides a broadband slot antenna, which comprises a U-shaped waveguide cavity, wherein at least one rectangular slot is formed in one side of an opening of the U-shaped waveguide cavity; two coupling feeds and two feed points are arranged in a way of corresponding to each slot. The broadband slot antenna has the beneficial effects that the antenna uses a U-shaped radiation cavity structure, so that a reflection effect is achieved; meanwhile, a main body part of the antenna is supported; the whole structure design is compact. In addition, the broadband slot antenna is different from a single feed point structure of a conventional slot antenna; the dual-point feed is used; the same-phase feed requirement is met; a directional diagram index is realized; and the impedance broadband requirement can be met. Experiment simulation results show that the two feed points cause two resonant frequencies. In addition, the micro-strip coupling feed is used; the impedance broadband requirement can be met. A coupling feed conduction band is distributed inside the cavity, so that the requirement of a simple structure is met.

An organic electroluminescent device comprises a substrate, an anode, a luminous layer and a cathode which are sequentially arranged in a laminating mode. The anode comprises a first metal layer, a dielectric layer and a second metal layer which are sequentially arranged on the substrate in a laminating mode, wherein the first metal layer is made of aluminum, silver, gold, aluminum-silver alloy, or magnesium- silver alloy and the thickness of the first metal layer is from 80 to 150 nm; the dielectric layer is made of transparent conductive oxide materials and the thickness of the dielectric layer is from 60 to 100 nm; and the second metal layer is made of aluminum, silver or gold and the thickness of the second metal layer is from 6 to 12 nm. The organic electroluminescent device has the advantage of being low in reflectivity. The invention also provides a production method of the organic electroluminescent device.

Provided is an electric connector, which is used for butt joint with a cable. The cable has a core. The electric connector is characterized in that the electric connector comprises an insulation bodyhaving a plurality of accommodating grooves, and each accommodating groove is provided with a first inclined surface and a second inclined surface, which are connected to each other, forming a intersecting line, and the first inclined surface and the second inclined surface are respectively disposed at two corresponding sides of the vertical plane; the electric connector comprises a plurality of signal terminals, which are respectively provided with a contact part; the plurality of contact parts of the multiple signal terminals are arranged in a row along the horizontal direction; the contactpart is provided with a butt joint face for connecting to the core in the manner of laser welding, and a first surface opposite to the butt joint face, and a second surface connected to the butt jointface and the first face. The invention is advantageous in that the first surface is in parallel with and contacts with the first inclined surface, and the second surface is in parallel with and contacts with the second inclined surface, and thereby the contact part is disposed in the accommodating groove in an inclined manner; the laser is reflected downwardly to the contact part of the core andthe butt joint surface by the butt joint surface, and thereby the laser energy can be well focused.

The invention discloses a multifunctional study desk. The multifunctional study desk comprises: a desk board body, a base and a lifting stand column, wherein the lifting stand column is connected with the desk board body and the base and used for adjusting the height of the desk board body relative to the base; an enclosure frame, which is connected with the desk board body and extends towards the upper portion of the desk board body, wherein the enclosure frame is provided with a left enclosure plate and a right enclosure plate which are located on the left side and the right side of the desk board body and a rear enclosure plate located on the side, away from a user, of the desk board body, and a working space is defined by the upper surfaces of the left enclosure plate, the right enclosure plate, the rear enclosure plate and the desk board body; a sound box unit, which is arranged in the working space; and a sound baffle assembly, which comprises two baffles arranged on the left side and the right side of the desk board body respectively and can move relative to the enclosure frame so as to allow the two baffles to stretch out of or retract into the enclosure frame. According to the multifunctional study desk, the sound effect of a sound box is good, and article storage capacity is high.

The invention provides a mobile wave-proof wharf, and belongs to the technical field of ocean engineering. The mobile wave-proof wharf comprises a pontoon and reinforced concrete solid piles; a load-bearing steel plate is arranged on the pontoon, guide locating rings are fixedly mounted on the load-bearing steel plate, the guide locating rings are arranged vertically downwards, and the top of thereinforced concrete solid piles is fixedly connected with the load-bearing steel plate by flanges after the reinforced concrete solid piles pass through the rear top of the guide locating rings; and aplurality of vertically downward steel plates are fixedly connected to the bottom plate of the pontoon, the height of the steel plates varies from small to large in the wave direction, and a plurality of small holes are formed in the plate face of each steel plate. The mobile wave-proof wharf can be used for lengthening a wharf, and is high in typhoon resistance and wave resistance, good in berthing safety, simple in structure, easy to construct and easy to remove.

The invention discloses an LED bulb. The LED bulb comprises a lamp holder, a heat dissipation base, a connecting part, a cross light-emitting panel and a lamp shade, wherein LED lamps are mounted on the cross light-emitting panel; in addition, LED lamps are mounted on the connecting part for light distribution, so that the luminous brightness of the whole bulb is higher, and 320-degree lighting is realized; and the size of the heat dissipation base can be adjusted according to the quantity of the LED lamps so as to enable the radiating effect of the heat dissipation base to be matched with the watt level of the bulb. Compared with a lamp with the same power, such as an energy-saving lamp, a sodium lamp and a halogen lamp, the brightness of the LED bulb can be improved by 60-80 percent; and as the LED bulb does not contain mercury, lead and other poisonous substances, as well as infrared rays and ultraviolet rays, so that environmental pollution is prevented.

The invention provides an epitaxial structure of a red and yellow GaAs diode and a preparation method of the epitaxial structure. The epitaxial structure comprises a substrate, and a Bragg reflector, an N-type limiting layer, a multi-quantum well layer, a P-type limiting layer, a P-type covering layer and a current expansion layer which are sequentially grown upwards on the substrate, wherein the Bragg reflector is of a periodic structure, Si doping is carried out on the Bragg reflector, and the Si doping concentration in the Bragg reflector is gradually increased along with increasing of the growth period of the Bragg reflector structure, so that the Bragg reflector has the function of an N-type covering layer. According to the invention, the epitaxial structure and the epitaxial processing technology can be simplified, the production cost is lower, the Bragg reflector integrates the reflection effect of the Bragg reflector structure and the composite light-emitting electron providing effect of the N-Cladding structure, and the light-emitting brightness of the diode can be improved.

The invention belongs to the technical field of wastewater treatment, in particular to a photocatalytic oxidation device for printing and dyeing wastewater treatment. Directed at the problem that wastewater chromaticity affects the catalytic effect, the invention puts forward the following scheme that: the device comprises a bottom plate, an ozone generator and a bleaching box are arranged on theouter wall of the top of the bottom plate, an air distribution pipe is arranged on the inner wall of the bleaching box, aeration discs distributed at equal intervals are arranged on the outer wall ofthe air distribution pipe, the inner wall of one side of the air distribution pipe and the output end of the ozone generator are provided with the same first guide pipe, and the air distribution pipeis of a V-shaped structure. The ozone method generator, the aeration discs, a first stirring rod, the air distribution pipe, an inclined rod, an elastic rope and a stirring frame are arranged; firstly, a dye can acquire a good decolorization effect through an ozone oxidation method, the air distribution pipe and the first stirring rod are both of a V-shaped structure, ozone and wastewater can be comprehensively and uniformly mixed by the first stirring rod at the first time after ozone is sprayed out of the aeration discs, and the decolorization effect of ozone can be effectively improved.

The invention provides a preparation method of a dissolved oxygen sensing membrane head and the dissolved oxygen sensing membrane head, and aims to solve the problems of long response time and easy falling of a fluorescent layer in the sensing membrane head in the prior art. The preparation method comprises the following steps: dissolving an indicator in a tetrahydrofuran solution to obtain an indicator solution, and adding the indicator solution into an emulsion of polystyrene microspheres while stirring; adding a calcium chloride aqueous solution, stirring, carrying out ultrasonic treatment, pouring onto a quartz plate, volatilizing, drying and curing to obtain a fluorescent layer; adding acrylic resin, styrene, ethyl acetate, xylene and organic silicone into a test tube, stirring and dissolving, spraying on the fluorescent layer, and drying to obtain a reflecting layer; dichloromethane, butyl acetate, polyacrylic resin, polystyrene, carbon black, paraformaldehyde, sulfonamide formaldehyde resin, simethicone, titanium dioxide powder, polyvinyl chloride, ethyl cellulose and stearic acid are mixed, stirred and dissolved, then sprayed to the reflecting layer and dried, and the shading layer is obtained. The fluorescent layer is not easy to elute.