Designing a Wide-Angle and Wideband Visible Antireflection Coating Using Vibrating Search Algorithm

A synthesis design method based on a vibrating search algorithm was proposed to achieve a wide-angle incidence visible antireflection coating design with an incident angle up to 50 above normal using only a two-material multilayer system. We found not only that the search algorithm is straightforward, but also that the resultant wide-angle wideband visible antireflection performance in the designed range is quite acceptable. It was shown that the maximum visible reflectivity was reduced to below 1.21% and that the average wide-angle visible spectral reflectivity can be reduced to lower than 0.30%. # 2010 The Japan Society of Applied Physics