| Abstract: | Cermets have been reactively deposited at an oblique angle onto transparent glass substrates at ambient temperature by thermal and cathodic arc evaporation. They have been found to display angular selective transmittance that is in general better than that found in oblique columnar films which are predominantly metallic. The structure and optical properties of Al/Al2O3 and Ag/Al2O3 films are discussed including the angle of incidence dependence, over a 120° range, of the integrated solar and photoptic transmittance. The spectral characteristics of these films can vary continously with angle of incidence with large differences possible between spectral properties at the same angle of incidence on opposite sides of the normal. Results indicate that those surfaces can provide the basis for applications including automobile and building glazing. The cathodic arc samples have the advantage of being very durable, which is essential for such applications. |
