VERFAHREN ZUR HERSTELLUNG EINES DUENNEN FILMS HOHER LICHTDURCHLAESSIGKEIT

摘要

A thin coated film having a transmittance of 96% or more for light having a particular wavelength in a range of 300 to 700 nm is prepared by coating one or both surfaces of a thin film of a transparent resin having a uniform thickness of 0.5 to 10 mu m with a colorless metal fluoride or oxide all over the area thereof with a thickness of about 100 nm while holding the thin film in a uniformly tensional state.