14results about How to "Reduce light transmittance" patented technology

This application discloses a prefabricated installation structure for metal ducts, belonging to the technical field of pipe connection structures. It provides a prefabricated installation structure for ducts with better connection flatness, including a bridging component connecting adjacent ducts. The bridging component includes an inner frame and an outer frame. A narrowing frame is provided between the outer wall of the inner frame and the inner wall of the outer frame. Embedded grooves are formed between the two end faces of the narrowing frame and the outer walls of the inner and outer frames. A pressing component is fixedly connected to a pair of opposing outer sides of the outer frame. The duct has an outwardly extending side plate on the side perpendicular to the pressing component. A snap-fit ​​component is fixedly connected to the outer frame on the side perpendicular to the pressing component. This invention, by providing a pressing component structure on opposing sides and applying pre-pressure, can better keep adjacent ducts in the same extension direction. Combined with the bridging component embedded in the duct end structure, the connection ends of the duct units can be kept flush, effectively reducing the light transmission probability at the connection point and effectively improving airtightness.

The utility model relates to gem processing detection technical field more specifically, relate to a gem cutting and grinding process three -dimensional dynamic optical detection module, including mounting bracket, the mounting bracket includes upper roof, left side board, lower bottom plate and right side board, the upper roof, left side board, lower bottom plate and right side board combine and form the rectangular structure, wherein the middle part of upper roof is provided with fixed hole, the middle part of lower bottom plate is open, the right side and left side of lower bottom plate are provided with first off -axis parabolic mirror and second off -axis parabolic mirror respectively, the upside of first off -axis parabolic mirror and second off -axis parabolic mirror is provided with semiconductor laser and acquisition camera respectively. First off -axis parabolic mirror focuses laser to gem surface, second off -axis parabolic mirror captures the laser signal of gem surface reflection, and reflects it to acquisition camera, realizes the dynamic focusing of curved surface gem detection without aberration, and this detection mode adopts non -contact detection, avoids the damage of gem surface.

The invention relates to an anti-impact and anti-dazzle integrated laminated display screen, and relates to the technical field of touch display screens, the display screen comprises an anti-dazzle layer, a flexible energy absorption layer and a touch display layer which are stacked in sequence; anti-reflection textures are arranged on the side, away from the flexible energy absorption layer, of the anti-dazzle layer and comprise a plurality of bosses, the cross sectional areas of the bosses are gradually decreased in the direction away from the flexible energy absorption layer, the bosses are arranged in a matrix mode, and the distance between every two adjacent bosses is smaller than the wavelength of visible light. According to the invention, the display screen has more excellent impact resistance and anti-dazzling capability at the same time, so that the display screen can meet comprehensive use requirements in a complex environment.

The utility model relates to a door for a household appliance, which can comprise a door main body arranged in front of a storage space of the household appliance; and a door panel coupled to the door body. The door panel may include a plurality of panels. A camera assembly for acquiring an image of the storage space may be disposed in a door internal space surrounded by the door main body and the door panel. The plurality of panels may include: a front panel constituting the front of the door panel; and a rear surface panel disposed rearward at a distance from the front surface panel. The camera assembly may be disposed at a position other than a region where the front panel and the rear panel face each other. Since the camera device is located outside the path of light reflection between the panels, external light cannot reach the camera device. Accordingly, the camera device can accurately capture only an image of an object disposed inside the home appliance, and can obtain an effect of improving the quality of the captured image by the camera device.

The utility model discloses a heat-insulation anti-reflection functional film which comprises a base material layer, a titanium dioxide layer, an indium tin oxide layer, a base layer and an anti-reflection layer which are sequentially stacked, the refractive index of the indium tin oxide layer ranges from 1.8 to 2.0, and the refractive index of the antireflection layer ranges from 1.40 to 1.45. On one hand, the heat insulation and anti-reflection functional film can reduce external heat entering a vehicle and reduce the use energy consumption of the vehicle in daily life, the viewing of passengers to external natural landscapes can be greatly enhanced by matching with the anti-reflection coating, and due to the fact that the forbidden band width (band gap) of the ITO thin film is usually between 3.5 eV and 4.3 eV, the heat insulation and anti-reflection functional film has a good anti-reflection effect. The energy of photons in the ultraviolet light area is larger than the forbidden band width, so that photons are absorbed and electron transition is caused, the extremely low light penetration rate is shown, and therefore the skin of a user in the vehicle can be protected from being hurt by ultraviolet rays.

The invention discloses a high-light-transmittance and high-concealment layered structure intelligent surface based on a composite micro-nano structure, a preparation method of the high-light-transmittance and high-concealment layered structure intelligent surface and electronic equipment, and belongs to the technical field of optical technologies, functional materials and man-machine interaction. A substrate layer; a polarization / angle selective metasurface layer; the customized narrowband filtering-multilayer film system layer is optically coupled with the polarization / angle selection type metasurface layer and is configured to have high transmittance for target wave band light emitted by the display element and have high reflectivity for visible light beyond the target wave band; and a display device layer. According to the technical scheme, in the non-working state, the light transmittance of visible light is extremely low, and perfect visual concealment is achieved. And in a working state, the system has extremely high overall transmissivity for a specific wave band of a display light source, so that bright and energy-saving display is realized. And the required optical power is obviously reduced, and the heat dissipation risk is reduced fundamentally.

This utility model discloses a novel bladeless fan, including a shell assembly, a centrifugal impeller, a motor, and a base assembly. The shell assembly includes a rear shell, a main shell, and a front shell. One end of the main shell has an air inlet and is detachably connected to the rear shell, while the other end is connected to the front shell. The front end of the front shell has an annular air outlet. A motor connected to the centrifugal impeller is housed within the inner cavity of the front and main shells. A funnel-shaped guide ring is provided inside the air inlet. The larger end of the guide ring smoothly transitions to the air inlet, while the smaller end extends into the guide ring of the centrifugal impeller and is a radially outward-curved arc end. The air inlet end of the guide ring is a radially curved arc end near the back of the smaller end of the guide ring. This utility model ensures that all air from the axial air inlet enters the centrifugal impeller, solving the problem of pressure relief at the air inlet end of the centrifugal impeller. It features an air inlet structure that conceals the interior and prevents debris from entering, providing excellent protection and possessing both design aesthetics and functionality.

The application belongs to the technical field of high polymer materials, and particularly relates to a heat-resistant blister packaging box and a preparation method thereof. According to weight parts, the heat-resistant blister packaging box comprises the following raw materials: 100 parts of polylactic acid, 4-8 parts of heat-resistant stabilizer, 1-3 parts of nucleating agent, 0.5-1 parts of chain-extending compatibilizer, 0.1-0.5 parts of antioxidant, and 0.1-0.3 parts of release agent. The application designs a multifunctional heat-resistant stabilizer with an aromatic imide-sulfone-siloxane structure, and constructs a synergistic crystallization system with a phenyl zinc phosphonate nucleating agent, and cooperates with a segmented temperature control rapid heat setting process. The heat distortion temperature of the obtained blister packaging box can reach 93.1 DEG C, the light transmittance is kept above 89.5%, the haze is below 3.5%, the forming cycle is shortened to 6-10 seconds, and there is no small molecule migration risk, so that the industrial production needs of the heat-resistant transparent packaging for food contact are met.

This invention relates to the field of lighting technology for highway tunnel lighting environment, specifically a lighting device for improving the lighting environment of highway tunnels; it includes: a light-shielding canopy installed on the rear side of the tunnel body, the light-shielding canopy being used to adjust the brightness of light entering the passage inside the canopy, and an adjustment mechanism installed on the light-shielding canopy; this invention can achieve rapid dynamic adjustment of the brightness of light inside the light-shielding canopy by quickly adjusting the gradient change of the overall light transmittance of the shielding film, thereby not only ensuring that the overall brightness inside the light-shielding canopy always transitions smoothly and stably with the lighting brightness inside the tunnel body, but also significantly improving the efficiency of dynamic adjustment of light brightness, while ensuring the stability and safety of the driver.

The application belongs to the technical field of lighting equipment, and particularly relates to a glare-proof educational lighting lamp, which aims at the problem that the existing light-shielding plate structure of the lighting lamp cannot be self-adaptively controlled according to the light intensity of the environment, and the following scheme is proposed, which comprises a lamp shade, a support, a bottom fixedly connected with the bottom of the support, an upper side of the support fixedly connected with the lamp shade away from the bottom, and an inner wall of the lamp shade provided with a bulb, a connecting ring, the upper side of the connecting ring fixedly connected with the bottom of the lamp shade, and four light sensors. The glare-proof educational lighting lamp disclosed in the application can make the device judge the fiber intensity or brightness in the environment, automatically reduce the light transmittance of the device in a strong light environment, reduce glare, improve the light transmittance of the device in a weak light environment, ensure clear vision, and thus improve the use experience of the user and reduce the eye fatigue of the user.

The present application belongs to the technical field of polymer materials, and particularly relates to a low-shrinkage high-transmittance polypropylene composition and a preparation method thereof. The composition is composed of the following raw materials in percentage by weight: polypropylene resin: 29.2-79.85%; polyethylene resin: 10-25%; elastomer: 0-10%; light diffuser: 0-5%; inorganic filler: 10-30%; nucleating agent: 0.05-0.5%; antioxidant: 0.1-0.3%; wherein the polypropylene resin is an impact copolymer polypropylene, and the ratio of the characteristic viscosity of the rubber phase to that of the polypropylene resin is 1-1.2; the polyethylene resin is prepared by using a metallocene catalyst. The present application optimizes the formula of the composition, significantly improves the transmittance, impact resistance and dimensional stability of the polypropylene material on the basis of maintaining excellent mechanical properties, so as to meet the market demand for high-performance polypropylene materials.

This invention discloses an adjustable light-transmitting automotive windshield system and automotive product. This invention allows for a reduction in the light transmittance of only the adjustable light-transmitting area unit within the control area, while maintaining a high light transmittance for the adjustable light-transmitting area units outside the control area. This weakens the intensity of strong light sources observed by the driver, reducing glare and discomfort caused by intense light emitted from external light sources, thus improving the driving experience and safety. Furthermore, this invention allows for the blocking of strong light from all directions, improving the ability to block strong light and reducing adverse consequences such as limited driver visibility caused by improper blocking. Moreover, the adjustable light-transmitting automotive windshield system operates without driver intervention, reducing the possibility of driver distraction and ensuring driving safety. This invention has wide applications in the automotive technology field.

This invention discloses a composite functional coating for UTG flexible glass, its preparation method, and its application, belonging to the field of glass surface treatment technology. It includes a high refractive index matching layer disposed on the surface of the UTG flexible glass, and a low refractive index hydrophobic reinforcement layer disposed on the surface of the high refractive index matching layer. The high refractive index matching layer is formed by heat treatment of a silane coupling agent-modified nano-zirconium dioxide and nano-silica composite sol. The low refractive index hydrophobic reinforcement layer is obtained by stacking two types of silica nanospheres with different particle sizes and in-situ modification with perfluoroalkylsilane. The coating of this invention enables the UTG flexible glass to achieve an average transmittance of over 95.3% in the 380-1100nm wavelength range, a water contact angle >150°, and a performance retention rate of over 95% after 1500 hours of UV aging and dry brushing. It also exhibits grade 0 adhesion, bend resistance, and fully meets the stringent requirements of various high-end flexible optoelectronic devices for high transmittance, durable self-cleaning, and weather-resistant toughness of the substrate glass.

The invention provides a laminated film, a cured product and an electronic component, and particularly relates to the technical field of circuit board protective films. The laminated film comprises a light-transmitting layer and a light-shielding layer which are sequentially laminated, the first glossiness of one surface of the light-transmitting layer away from the shading layer is less than or equal to 15; the light transmittance of the light transmitting layer is 70-90%, and the light transmittance of the light shielding layer is 20-60%. According to the laminated film provided by the invention, the first glossiness is controlled to be less than or equal to 15, and the surface glossiness (namely the second glossiness) after final curing is maintained at a relatively low level, so that an ideal matte appearance is obtained. Meanwhile, the light transmittance of the light-transmitting layer is controlled to be 70-90%, light can reach the bottom in the exposure process, curing of the shading layer is improved, and smaller and more complete windowing patterns are formed; the light transmittance of the light shielding layer is controlled to be 20-60%, the light transmittance is low, but the covering power is high, and enough covering power is provided for a finally formed cured product.