Coligh is specialized in optical filter components manufacturing, our products include lens, domes, windows, prisms and custom shaped parts. We specialized in infrared solution for infrared optical material, cold processing technique and custom thin film coating for Zinc selenide (Znse), Sapphire, Silicon, Calcium Fluoride, Fused silica, Magnesium Fluoride, Zinc sulfide, and Ruby Optics. Size varies from 2mm to 1000mm. Learn More