Both Side Anti Reflection Coating on Sapphire Glass for Watch

Abstract

  By applying anti-reflection coating on both sides (front and back) of the sapphire windshield of the wristwatch, we prevent degradation of visibility, color tone and contrast of the dial and hand due to reflection. However, in achieving this coating, there were some problems, especially on the front side coating of the windshield. In this thesis, we will introduce what we have done to solve this problem.