METHOD OF MAKING ANTIREFLECTION COATING BASED ON MESOPOROUS SILICA USING SOL-GEL METHOD IN PRESENCE OF CERTAIN POLYMERS, STATIC COPOLYMERS

摘要

FIELD: chemistry.;SUBSTANCE: invention relates to thin-film interference coatings for coating optical elements. A method is proposed for making thin 50-200 nm single-layer antireflection coating based on mesoporous silica on objects made from silicate glass with transmission maximum of 97.0 to 98.5% in the visible spectrum, involving a) sol-gel process of silicon tetraalkoxide in the presence of an organic additive in concentration of 0.1 to 5.0 wt % to the weight of the sol, using nanostructure self-organising techniques, induced by evaporating solvent EISA, b) heating a sample with coating in an air atmosphere at 300 to 600°C for several hours for thermal decomposition of the organic additive. The organic additive, which determines spontaneous micro-separation of inorganic and organic phases during formation of solid coating on glass, is in form of carbon-chain polymers, which contain lateral ether or ester groups or carbon-chain static copolymers, containing ether groups and ester groups.;EFFECT: design of a method of obtaining cheap coating with low refraction index of 1,25-1,34.;1 cl, 7 dwg, 7 ex