Gunther Walze, Peter Nitz, Jurgen Ell, Andreas Georg, Andreas Gombert, Wolfgang Hossfeld, Fraunhofer-Institute for Solar Energy Systems ISE, Heidenhofstr. 2, 79110 Freiburg, Germany

New developments in large scale micro structuring of surfaces offer a wide range of applications in glazings with solar control and light redirecting properties. In many cases, e. g. when using prism arrays or Compound Parabolic Concentrator (CPC) arrays, the geometry of these structures allows to coat single facets of the structure selectively with optical coatings. This selective coating technique offers a way to further improve the optical performance. First prototypes of prismatic arrays with face-selective surface coatings have been realized and their hemispherical and direct transmission has been measured. Furthermore, a gaschromic switchable coating and a switchable mirror have been applied face-selectively. We will give an overview of the realized systems and discuss the results of the measurements. We will also give an outlook of some further concepts for the use of optically functional coatings or layers combined with light redirecting surface structures.