| 摘要 |
PURPOSE:To improve the adhesiveness, durability and optical characteristics of an antireflecting film by subjecting a glass stock to an etching treatment, then to press forming and depositing a dielectric material by evaporation on the press formed material. CONSTITUTION:The glass stock consisting of lead glass, etc., is ground and etched. Said stock is preferably treated by repeating the stages for immersing the stock in an aq. hydrofluoric acid soln., then rinsing and drying the stock. The treated stock is then press-formed by using prescribed metallic molds, by which the optical glass element formed with faces 20, 21 is obtd. The antireflecting film consisting of MgF2, etc., is in succession formed by vapor deposition, etc., on the faces 20, 21. The antireflecting film having the excellent adhesiveness, durability and optical characteristics is obtd. according to this method. |
