25results about How to "Increase refraction" patented technology

The invention provides a light-emitting diode, a manufacturing method thereof and a light-emitting device. The light-emitting diode comprises a substrate, and a first semiconductor layer, an N-type semiconductor layer, a light-emitting layer and a P-type semiconductor layer which are sequentially positioned on the substrate, the first semiconductor layer comprises a first layer body and a lug boss; the convex part is arranged on the upper surface of the first layer body and comprises a plurality of bulges; the N-type semiconductor layer fills gaps among the plurality of protrusions. As the N-type semiconductor layer is low in contact resistance and good in conductivity, the projection part is arranged on the first semiconductor layer, the contact area between the first semiconductor layer and the N-type semiconductor layer is increased, the current expansion performance of the contact surface between the first semiconductor layer and the N-type semiconductor layer is improved, the burst caused by current gathering in the light-emitting diode is avoided, and the light-emitting efficiency is improved. The local brightness of the light-emitting diode is reduced; and the brightness is non-uniform.

The invention belongs to the technical field of glass fiber composite materials, and particularly relates to a flame-retardant, heat-insulating and sound-absorbing composite material and a preparation method thereof. By adding zirconium oxychloride, gadolinium nitrate and other materials, the flame retardant property of the composite material is enhanced, the inflammability of the composite material under a high-temperature condition is effectively reduced, and the safety of the material under an extreme condition is improved; the introduction of the phase change material is beneficial to heat management of the material, and heat can be absorbed and stored in a high-temperature environment, so that a good heat insulation effect is provided; the materials such as the modified glass fibers and the basalt fibers are added, and the fibers have good acoustic performance and can effectively reduce noise transmission, so that the sound absorption effect is improved; therefore, the mechanical property of the material is improved, the good durability and stability of the material are ensured, and the long-term reliability of the material is ensured.

The invention discloses optical glass, a prefabricated member thereof, an optical element and an optical instrument, and relates to the technical field of optical glass. The optical glass comprises the following components in percentage by weight: 2 to 15.2 percent of SiO2; 8 to 22 percent of B2O3; la2O3: 40% to 60%; 3 to 18 percent of Y2O3; zrO2: 1%-15%; 2 to 15 percent of Nb2O5; 0 to 9 percent of Gd2O3; znO: 0 to 10%; 0 to 10 percent of Ta2O5; 0 to 6 percent of TiO2; 0 to 10% of RO; 0 to 8% of Rn2O; 0 to 8 percent of WO3; 0 to 5 percent of Al2O3; 0 to 8 percent of Yb2O3; 0 to 5 percent of GeO2; 0-1% of a clarifying agent; (Gd2O3 + ZnO) / Y2O3 is 2.0 or less; the thermal expansion coefficient alpha-30 / 70 DEG C of the optical glass is below 85 * 10 <-7 > / K, and the abrasion degree FA is 75-120. The high-refractive-index optical glass obtained by the invention has relatively low thermal expansion coefficient and excellent abrasion degree.

The present application discloses a large aperture internal focusing telephoto camera lens. The camera lens comprises, from the object side to the image side, a first lens group with positive focal power, a second lens group with negative focal power, an aperture stop, a third lens group with positive focal power, and a fourth lens group with negative focal power; during the focusing process, the second lens group moves along the optical axis toward the image side, the third lens group moves along the optical axis toward the object side, and the positions of the first lens group and the fourth lens group relative to the image plane remain unchanged; the large aperture internal focusing telephoto camera lens satisfies the following conditions: 0≤F1 / F≤2, (1); ‑2≤F2 / F≤0, (2); 0≤F3 / F≤2.5, (3); ‑6≤F4 / F≤0, (4). The technical solution of the present application can reduce aberrations, field curvature and distortion by setting the positive and negative focal powers of each lens group, the ratio between the composite focal length of each lens group and the composite focal length of the entire lens, and a unique focusing mechanism, thereby improving the imaging quality.

The invention provides a surgical monoclonal antibody laser resistance test device, which belongs to the field of laser resistance test equipment, and comprises a laser emitter, an optical transmission device, an indicator light device, a power detector component and a test box; the optical transmission device can perform telescopic actions, and when the optical transmission device is in the extended action, the laser emitted by the laser emitter is reflected to the power detector component through the optical transmission device to monitor the laser power; at the same time, the indicator light emitted by the indicator light device can be refracted onto a sample installed in the test box through the optical transmission device; when the optical transmission device is in the retracted action: the laser emitter can emit a test laser to the sample installed in the test box, and the optical transmission device can be used to conveniently switch the laser emitter between a preheating state and a working state, and at the same time, the indicator light emitted by the indicator light device can be conveniently refracted onto the sample installed in the test box to perform aiming indication during the test.

The utility model relates to the technical field of ultrasonic flowmeters, in particular to a pipeline structure suitable for an external clamping type ultrasonic flowmeter. The pipeline is a round pipeline, and a first sensor probe and a second sensor probe of the external clamping type ultrasonic flowmeter are arranged on the round pipeline in an up-and-down opposite angle mode; a plurality of arc-shaped protrusions are arranged on the wall of the pipeline at equal intervals along the axis of the pipeline, the arc-shaped protrusions are protrusions towards the outer side of the pipeline, and the arc-shaped protrusions are annular in the circumferential direction of the pipeline. And the plurality of arc-shaped bulges are positioned between the first sensor probe and the second sensor probe. The external clamping type ultrasonic flowmeter can eliminate or weaken ultrasonic waves transmitted along the wall of the pipeline, and interference on the external clamping type ultrasonic flowmeter during measurement is reduced.

This invention provides a compound for use in organic electroluminescent devices and its application, the compound having the structure shown in formula (I): L, L 1 L 2 Each is independently selected from single-bonded, substituted or unsubstituted C6-C30 arylene or substituted or unsubstituted C3-C30 heteroarylene; Ar 1 -Ar 2 Each is independently a substituted or unsubstituted C6-C30 aryl group or a substituted or unsubstituted C3-C30 heteroaryl group; X 1 ~X 11 Each independently selected from CR 1 Or N, the R 1 Each is independently selected from one of the following: hydrogen, cyano, nitro, hydroxyl, substituted or unsubstituted C1-C20 chain alkyl, C3-C20 cycloalkyl, C1-C20 alkoxy, C1-C20 silyl, C6-C60 aryl, and C3-C60 heteroaryl, wherein R 1 Each of the substituted or unsubstituted groups can be independently and optionally linked to form a ring; when the above-mentioned substituted or unsubstituted groups have substituents, the substituents are selected from one or more combinations of halogens, C1-C20 chain alkyl, C3-C20 cycloalkyl, C1-C20 alkoxy, C1-C20 thioalkoxy, C1-C20 silyl, cyano, nitro, hydroxyl, C6-C60 aryl, and C3-C60 heteroaryl.

The invention provides optical glass, which comprises the following components in percentage by weight: 20 to 35 percent of P2O5; nb2O5: 37% to 55%; 1 to 12 percent of TiO2; 4% to 19% of BaO; and 0.5 to 14 percent of Na2O. Through reasonable component design, the optical glass provided by the invention does not contain components harmful to the environment, such as PbO, has high refraction and high dispersion performance, and meets the use of high-performance optical instruments.

The application discloses a front light guide plate for a reflective display device and a manufacturing method thereof, comprising a light guide plate body with an incident light surface and an exit light surface oppositely arranged; a plurality of light guide dots formed on the exit light surface for guiding light from the incident light surface to a display surface of the reflective display device; wherein the light guide dots are conical or pyramidal; when the light guide dots are conical, the ratio of the bottom width A to the depth B is less than 0.1; when the light guide dots are pyramidal, the included angle between the inclined surface and the bottom surface is between 55 degrees and 70 degrees. The application optimizes the shape parameters of the dots, so that the light is more efficiently guided to the display surface, thereby significantly improving the overall display brightness under the same light source conditions.

The invention relates to the field of vamp materials, and particularly discloses an anti-yellowing vamp material and a preparation method thereof. The yellowing-resistant vamp material is prepared from 80 to 100 parts of polyether polyol, 60 to 80 parts of isocyanate, 10 to 20 parts of a chain extender, 5 to 10 parts of pore-forming particles, 2 to 5 parts of ultraviolet absorption particles, 2 to 10 parts of filling particles, 1 to 5 parts of a lubricating agent, 1 to 5 parts of a dispersing agent, 1 to 3 parts of an antioxidant and 1 to 5 parts of an ultraviolet light absorber, the preparation method comprises the following steps: weighing the polyether polyol, the isocyanate, the chain extender, the pore-forming particles, the ultraviolet absorption particles and the filling particles, and uniformly mixing and stirring to obtain a primary mixture; adding a lubricating agent, a dispersing agent, an antioxidant and an ultraviolet light absorber into the primary mixture, and uniformly mixing and stirring to obtain a mixture; and reacting and forming the mixture to obtain a finished product. Meanwhile, the coating has the advantages of yellowing resistance and better wear resistance.

The application discloses a preparation method of a high-strength flexible self-supporting hydrophobic electromagnetic shielding film, which comprises the following steps: weighing a certain amount of carbon titanium-aluminum, slowly adding the carbon titanium-aluminum into a lithium fluoride / hydrochloric acid etching solution, magnetically stirring in a water bath at a certain temperature for a period of time, obtaining an etched carbon titanium-aluminum dispersion liquid, carrying out acid pickling on the carbon titanium-aluminum dispersion liquid by using dilute hydrochloric acid, and then washing the carbon titanium-aluminum dispersion liquid until neutral, so as to obtain multi-layer titanium carbide; carrying out ultrasonic treatment on the multi-layer titanium carbide, so as to obtain few-layer titanium carbide; mixing the prepared few-layer titanium carbide and bacterial cellulose with nano-iron oxide respectively; alternately performing vacuum filtration on the mixed solutions of bacterial cellulose / nano-iron oxide and few-layer titanium carbide / nano-iron oxide; and naturally airing the obtained film at room temperature. Finally, methyltrimethoxysilane is deposited on the surface of the film to form a hydrophobic network. The film prepared by the method has the characteristics of good flexibility, high electromagnetic shielding performance and high mechanical strength.

The utility model discloses a motorcycle steering lamp structure, including the lamp shell and the lamp pearl, the inside of lamp shell is provided with the circuit board, and the top of lamp shell is provided with the lamp shade, the surface of circuit board is provided with the lamp pearl, and one side of lamp shell is provided with the steering pole, the utility model discloses a double fixed structure through bolt and elastic buckle, has realized the firm connection of lamp shade and lamp shell, has guaranteed the stability of steering lamp under complex road condition, and the lamp shade and lamp shell installation disassembly are more convenient further, through the cooperation of the plug -in pole in lamp shell and the plug -in barrel on the circuit board, make the circuit board can accurate installation in lamp shell, has guaranteed the stability of circuit connection, through the reflection of the light -reflecting part can effectively reflect the ambient light, even if the steering lamp is not opened, also can through the reflection car headlamp, street lamp etc. Light, make the motorcycle contour more clear, remind other road user's attention, through the good refraction and dispersion effect of arc lamp shade to light, has improved the visibility of the steering signal significantly.

The invention belongs to the technical field of films, and discloses a privacy stain-resistant bathroom film and a manufacturing method thereof. The film comprises a base film, a mounting adhesive layer coating liquid and a stain-resistant privacy coating liquid on the base film, and a release film on a mounting adhesive layer, and the mounting adhesive layer coating liquid comprises, by mass, acrylic resin, butanone, acetic ether, toluene, a curing agent and a UV absorbent. The stain-resistant privacy coating liquid is prepared from the following components in parts by mass: tripropylene glycol diacrylate, trimethylolpropane triacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, acrylic resin, a photoinitiator, a leveling agent, ethyl acetate, butanone and microparticles with the diameter of 1 to 7 microns. By pasting the anti-explosion film on the glass of the shower room, the safety, the stain resistance and the privacy of the glass can be improved, the living requirements of people are met, only the privacy stain-resistant bathroom pasting film needs to be added for the installed shower room, operation is easy, and the cost is low.

The present invention provides a surgical sheet laser resistance test system, which belongs to the field of laser resistance test equipment, and includes a support frame, a laser controller, a test device assembly, a laser transmitter, an optical transmission device, an indicator light device, a power detector assembly and a test box; the laser controller is used to adjust the laser power output by the laser transmitter; the test device assembly is used to receive and display the feedback information of the power detector assembly and the working components in the test box; and can control and adjust the laser controller and the indicator light device to execute corresponding test instructions; the optical transmission device can switch the laser transmitter between the preheating state and the working state, and can also refract the indicator light emitted by the indicator light device into the test box for aiming and indication. The laser light sources used in the ignition test and the penetration test are combined into one, which can make the structure more compact and easy to operate. Thereby meeting the quality inspection of various surgical sheets and related products to ensure the improvement of product quality.

This invention relates to the field of optical lens technology, and more particularly to an optical system for a large-aperture full-frame fixed-focus lens. It includes a first objective lens group, a second objective lens group, and a third objective lens group arranged sequentially from the object side to the image side along the optical axis. The third objective lens group includes an aperture stop. During focusing, the second objective lens group moves along the optical axis to the image side, while the positions of the first objective lens group, the aperture stop, and the third objective lens group relative to the image plane remain unchanged. This invention's optical system for a large-aperture full-frame fixed-focus lens optimizes light refraction and convergence, balances aberrations, and improves image quality by setting the positive and negative optical powers of each lens group and the ratio between the combined focal length of each lens group and the combined focal length of the entire lens. This further enables the lens to achieve higher image quality.

The sun-proof and rain-proof fabric comprises a water-repellent porous layer, a hydrophilic layer and a sun-proof and rain-proof layer from inside to outside, the water-repellent porous layer, the hydrophilic layer and the sun-proof and rain-proof layer are connected through sewing, the sun-proof and rain-proof layer comprises a sun-proof area and a rain-proof area, the rain-proof area is formed by weaving expanded yarns, the sun-proof area is formed by weaving anti-ultraviolet yarns, and in a natural state, the water-repellent porous layer, the hydrophilic layer and the sun-proof and rain-proof layer are connected through sewing. The rain-proof area is higher than the sun-proof area, and the rain-proof area expands to cover the sun-proof area in a water absorption state. The three layers of fabric formed by weaving are sewn, the water-repellent porous layer formed by weaving replaces an existing film formed by coating, the hydrophilic layer absorbs water vapor of the water-repellent porous layer, the sun-proof area of the sun-proof and rain-proof layer is woven by uvioresistant yarn, the rain-proof area is woven by expansion yarn, and in a natural state, the sun-proof area is not prone to falling off. The concave-convex height difference is formed between the sunscreen area and the rainproof area, and in the water absorption state, the expansion yarn in the rainproof area expands when meeting water to cover the sunscreen area, so that the fabric is rainproof, sunscreen and breathable.

The present invention provides a front end structure, an insertion part and an endoscope of an endoscope, and relates to the technical field of medical devices. The front end structure includes a front end shell, whose distal end surface is provided with a mounting hole; a camera module, which is installed in the mounting hole, and a receiving gap is formed between the camera module installed in place and the distal opening of the mounting hole; a transparent optical disc, which is movably arranged in the receiving gap, and the transparent optical disc has a rotating part, and the rotating part is evenly distributed circumferentially on the proximal surface of the transparent optical disc; a water spraying part, including a spraying part and a circulation part, the spraying part is arranged in the front end shell, and the spraying part has a spraying port facing the distal end surface of the transparent optical disc; the circulation part is arranged in the front end shell and communicated with the spraying part, and is used for the flushing liquid to enter from the proximal end of the endoscope and flow into the spraying part, so that the flushing liquid is sprayed to the distal end surface of the transparent optical disc through the spraying port. Compared with the prior art, the present invention can solve the problem of blurred imaging of the camera module.

The invention discloses the field of semiconductor Micro-LED display, and particularly relates to a Micro-LED with a high light extraction rate and a preparation method thereof.The Micro-LED with the high light extraction rate comprises a substrate (1), an epitaxial wafer (2) is arranged on the substrate (1), a plurality of nano holes (3) are formed in the top of the epitaxial wafer (2), a plurality of spherical particles (4) are arranged in the nano holes (3) in a one-to-one correspondence mode, and the spherical particles (4) are arranged in the epitaxial wafer (2) in a one-to-one correspondence mode. According to the micro-LED epitaxial wafer, the nanopores are etched in the top of the epitaxial wafer, the spherical particles are embedded into the nanopores, the propagation path of light is changed by arranging the spherical particles, the refraction and reflection efficiency of the light is improved, the Plasma effect is further enhanced, and therefore the light extraction efficiency of the micro-LED is remarkably improved, and the service life of the micro-LED is prolonged. The method is simple to operate and high in adaptability, can be applied to Micro-LED devices of various sizes and types, and has a wide application prospect.

This invention belongs to the field of electromagnetic wave absorbing materials technology, specifically relating to a nickel-boron-doped cobalt-based layered carbon absorbing material and its preparation method. This invention utilizes a cobalt-based boron imidazole precursor framework as a template, and forms a two-dimensional layered layered double hydroxide (LDH) through a chemical oxidation etching process using nickel ions. This LDH is then subjected to high-temperature reduction to obtain the nickel-boron-doped cobalt-based layered carbon material. This material leverages the unique properties of two-dimensional materials to achieve high impedance matching, allowing electromagnetic waves to enter the absorber at a significant rate. Furthermore, the material's excellent dielectric polarization and magnetic coupling attenuate the electromagnetic waves entering the absorber. The material achieves a minimum reflection loss of -60.1 dB and a maximum effective absorption bandwidth of 6.24 GHz, giving it excellent electromagnetic wave absorption capabilities. The preparation method of this invention is simple and easy to mass-produce.

The invention discloses a domestic porcelain bubble antibacterial glaze and a preparation method thereof, the domestic porcelain bubble antibacterial glaze comprises 15-30 parts of quartz, 30-50 parts of potassium feldspar, 1-4 parts of calcium sulfate, 1-3 parts of zircon sand, 5-7 parts of zinc oxide, 3-7 parts of kaolin, 5-8 parts of tea spar, and 15-20 parts of calcium carbonate, the zircon sand contains potassium 40, the tea spar contains thorium 232, through interaction among the quartz, the calcium sulfate and the tea spar, wrapped bubbles are generated, and the bubble antibacterial glaze is prepared. The refraction and reflection capabilities are enhanced, so that the antibacterial properties of the thorium-232 and the potassium-40 are excited more quickly, and the overall antibacterial capability of the glaze is improved.

The application provides a solar cell, a photovoltaic module and a photovoltaic system. The solar cell comprises: a solar cell body; a sub-wavelength nano light-trapping layer formed on at least part of the surface of the solar cell body, wherein the at least part of the surface comprises one or more of a front surface, a back surface and a side surface; the sub-wavelength nano light-trapping layer comprises a plurality of light-trapping structures; the width of the gap between adjacent light-trapping structures changes in the direction away from the substrate of the solar cell body; the sub-wavelength nano layer can be prepared on the front surface, the back surface and the side surface of the solar cell, so that the incident light is subjected to multiple reflections and refractions, the propagation path of the light is prolonged, the light absorption rate is improved, and the light utilization rate is improved.

The invention relates to the technical field of chlorine removal devices, and proposes a photocatalytic total chlorine removal device for dialysis water. The device comprises a fixed frame, a first cylinder, a water treatment cylinder, a photocatalytic component, a residual chlorine treatment component, a residual chlorine detection component and a drainage component. Two first cylinders are symmetrically installed inside the fixed frame, the water treatment cylinders are fixedly installed inside the two first cylinders, the water treatment cylinders are made of transparent material, the photocatalytic components are installed in the two first cylinders, the residual chlorine treatment component is installed inside the fixed frame, the residual chlorine detection component is installed on the residual chlorine treatment component, and the drainage component is installed on the inner bottom wall of the fixed frame. Through the above technical scheme, the problem of insufficient light intensity and low continuity in the prior art, which makes it difficult to effectively remove chlorine in water, resulting in a small amount of chlorine remaining inside the equipment and affecting the safety of use, is solved.

The utility model provides tunnel type microwave vacuum ultralow-temperature drying equipment which is used for drying materials and comprises main machine equipment, the main machine equipment comprises a cavity and a plurality of microwave generators, the cavity is of a cylindrical structure, the inner section of the cavity is in the shape of a regular polygon, and the microwave generators are arranged in the cavity. The plurality of microwave generators are respectively arranged on the outer wall surface of the cavity and are sequentially arranged at least along the length direction of the cavity; a vacuum port of the vacuum unit is communicated with the cavity through a pipeline; a cooling water pipe of the water chilling unit is communicated with the microwave generator, and the water chilling unit is used for cooling the microwave generator. By utilizing the characteristic of oscillation heating of microwave polar molecules and assisting with the vacuum unit to vacuumize the cavity, the water-containing material in the cavity is quickly evaporated at low temperature in a vacuum environment to realize drying, the drying efficiency is high, and in addition, the material can be prevented from being damaged due to over-high temperature.

The application relates to a solar cell and a preparation method thereof, the solar cell comprising a first electrode, a first passivation layer, a semiconductor substrate, a second passivation layer and a second electrode arranged in sequence from top to bottom, the semiconductor substrate being provided with a plurality of first grooves arranged at intervals on the front surface, the first electrode being arranged in the first grooves, and the surface of the semiconductor substrate in the first grooves being in contact with the first passivation layer being provided with a first polarizing structure and / or at least one sidewall of the first electrode being provided with a third polarizing structure. The application reduces the light shielding area of the electrode by arranging grooves on the semiconductor substrate before texturing, and the polarizing structure is obtained through secondary texturing treatment, the polarizing structure can increase the folding times of light, so that the light path is longer when the sunlight is irradiated, light absorption is promoted, and the photoelectric conversion efficiency of the cell is improved.