2results about How to "Solve absorption" patented technology

The invention relates to the technical field of optical thin films, and particularly discloses a deep ultraviolet special-shaped quartz element antireflection film and a preparation method thereof.The preparation method comprises the steps that a first MgF2 thin film layer is obtained through deposition on the surface of a substrate, and a first fluorine-doped thin film layer is prepared; preparing an antireflection film layer on the surface of the first fluorine-doped film layer; and depositing a first MgF2 thin film layer on the surface of the antireflection film layer to prepare a first fluorine-doped thin film layer, depositing a second MgF2 thin film layer on the surface of the antireflection film layer to prepare a second fluorine-doped thin film layer. According to the deep ultraviolet special-shaped quartz element antireflection film provided by the invention, the first fluorine-doped MgF2 thin film layer is deposited on the substrate, so that the intrinsic absorption difficulty of the special-shaped quartz substrate at 193nm can be effectively solved, and the antireflection rate is improved; and in a 193nm wave band, the refractive index of MgF2 is lower than that of the substrate, and as a bottom layer film, the first MgF2 thin film layer can enable incident light to be subjected to reflection and interference on a film layer interface, reduce reflected light and enable more light to enter the substrate, so that the absorption proportion of the light in the substrate is relatively reduced, the overall light loss of the system is indirectly reduced, and the anti-reflection rate is improved.

This utility model provides a paddle dryer for desulfurized gypsum, belonging to the technical field of dryers. It includes a base frame, to which a drying shell is fixedly connected via a support plate. Two hollow shafts are symmetrically and rotatably connected within the drying shell. Two sets of paddle blocks are fixedly connected at equal intervals on the two hollow shafts. A meshing first gear is fixedly connected to one end of each hollow shaft on the same side. A bearing plate is fixedly connected to the upper surface of the base frame near the first gear, and a reducer is fixedly connected to the upper surface of the bearing plate. This utility model, through its purification cylinder, bearing ring, mounting ring, activated carbon plate, and reduction mechanism, achieves the adsorption of harmful gases in the gas discharged during the drying process. It can reduce the activated carbon plate, restoring its adsorption capacity and ensuring subsequent adsorption capacity for continuous use. This solves the problem in existing technologies where activated carbon becomes saturated and inconvenient for absorbing subsequent harmful gases.