The effect on transparency and light scattering of dip coated antireflection coatings on window glass and electrochromic foil

Modern windows tend to include an increasing number of functional coatings and in order to keep the light transmittance at an acceptably high level antireflection coatings are likely to be used in future high performance windows. For switchable coatings this may be necessary in order to make them sufficiently light in the bleached state. In this paper we have investigated how haze levels of a selection of coatings on glass and plastics, including electrochromic PET foil, are influenced by the additional antireflection coatings. The results indicate a possible increase in light scattering levels for the antireflection coatings on PET foil and a reduction of haze for tin oxide coated glass.