Effect of Angle of Incidence on Weakly Absorption Coating Prepared by Spray Pyrolysis Method

This paper presents the methodology of the design of weakly absorption coatings at oblique incidence of light for full-wide angle (0 - 90°). The design was based on the modified characteristic matrix theory taking into account the effect of absorption and dispersion of layers and substrate. The optical constants of SnO3 : Al2O3 realized using spray pyrolysis technique deposited on BK -7 glass .The study involve normal and non-normal incidence. Result indicate that such a coating may be used as a neutral beam splitter of various T/R ratios over a wide range of angle of incidence (0 - 60°) and wavelengths .