Application of microstructured surfaces in architectural glazings

Interference lithography is a promising technology to produce large areas of periodical microstructured surfaces on glass or plastic. Anti-reflective and anti-glare coatings, easy-to clean surfaces and combinations of some of these features in one surface are possible. It also allows the miniaturization of light guiding and light reflecting optical elements. Two different types of optical elements with a strongly angular selective transmission were designed and fabricated: reflective prismatic structures and dielectric compound parabolic concentrators. Integrated in architectural glazings they can be a cost-effective solution for static seasonal sun protection.