5results about How to "Reduce light transmittance" patented technology

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.

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 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.