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为了增大光的透射量,加强造象的真实度和清晰度,在光学仪器的制造技术上,人们采用了在透镜上形成增透膜的办法。在成膜方法方面,各国都有不同的建议,其中以制成二氧化硅或二氧化钛薄膜的方法最为普遍。形成二氧化硅薄膜,一般是采用硅酸盐水解的办法: Na_2SiO_3+2H_2O→←H_2SiO_3+2NaOH H_2SiO_3=SiO_2+H_2O使用的药剂,根据文献报导,一般是采用正硅酸乙醋的乙醇或其他溶剂的溶液。我们分别将正硅酸乙酯的15—25％无水乙醇
In order to increase the amount of transmitted light and enhance the authenticity and sharpness of the image, people have used the method of forming an antireflection film on the lens in the optical instrument manufacturing technology. In terms of film-forming methods, various countries have different proposals, of which the most common method is to make a film of silica or titania. The formation of silica film, the general method is to use silicate hydrolysis: Na_2SiO_3 + 2H_2O → H_2SiO_3 +2NaOH H_2SiO_3 = SiO_2 H_2O use of the pharmaceutical, according to the literature, the general is the use of ethyl silicate of ethyl alcohol or other solvents The solution. We divided 15-25% of ethyl orthosilicate in absolute ethanol