Reflexion of a double layer AR-coating on polycarbonate

http://www.inm-gmbh.de

Contact:
Dr. M. Mennig
Physics and chemistry of glasses
Tel.: ++49-681-9300-394
Fax: ++49-681-9300-223

• Production of antireflective coatings through the sol gel process for organic and inorganic substrates

Method

• By sol gel process coatings with high content of metall oxides are wet chemicaly prepared
• Essential part of the coating material are oxide nanoparticles (SiO₂, TiO₂) modified with polymerizable silanes
• Application of the coatings by dip- and spin-coating and thermal curing (<100 °C) or UV-curing (2.1 J/cm²)

• l /4-TiO₂-layer on polycarbonate with a refractive index of 1.92 (wavelength 550 nm)
• l /4-SiO₂-layer on polycarbonate with a refractive index of 1.47 (wavelength 550 nm)
• variation of the refractive index of the layers (n_D =  1.47 up to 1.92) by mixing the nanoparticles
• l /4-double layer (TiO₂-SiO₂) on polycarbonate with reflexion of 0,6 % (wavelength 550 nm)

Applications

• In the fields of eye glasses, displays, screens, semiconductor lasers, microlenses, solar cells, damage resistant laser surfaces, etc.