Sight glass for industrial applications

Creator Optics can make customized sapphire viewport for vacuum and industrial furnaces. The diameter is from 12mm to 200mm. The thickness is from 2mm to 20mm. All of these Sapphire Viewports have deep-polished surface and good flatness and parallelism. Optical coatings are avaliable upon request. - Surface Quality: 80/50, 60/40. - Clear Aperture : 90% of circle. - Coating: We provide different single layer or multiplayer anti-reflecting ( AR ) coating against differrent requirements, customized available.