Yutai Optics’Optical Windows are offered in a variety of substrates, such as Sapphire,H-K9L(BK7),Germanium (Ge), Silicon (Si), N-BK7, UV Fused Silica, Zinc Selenide (ZnSe). Multiple anti-reflection coating options are available for the Ultraviolet (UV), visible, or Infrared (IR).Laser Windows are also available and with high quality.Laser windows are made of JGS series fused silica from China or imported Corning series.