蒸发的铝膜被广泛地应用在光学仪器中作为反射镜,这是因为铝膜具有不易失去光泽和高反射率的有用性质,对白光为86～92％,在短波部分也有80％的反射比,化学稳定性好,它本身能生成氧化铝保护层,但蒸发的铝膜机械强度差(机械强度为4级),不允许用机械方法来清洁膜层,稍不注意,就会产生划痕,使反射率有所降低,但在蒸发的铝膜上采用镀一 Evaporated aluminum films are widely used in optical instruments as mirrors because aluminum films have useful properties that are resistant to tarnishing and high reflectivity, with white light of 86-92% and a short wave portion of 80% of the reflectance , Chemical stability, which itself can generate alumina protective layer, but the evaporation of aluminum film mechanical strength (mechanical strength of 4), does not allow mechanical methods to clean the film, a little careless, it will have scratches , So that the reflectivity decreased, but the evaporation of the aluminum film using a plating