Material:optical glass or as request Usage:Optical Structure:as request Shape:Plano Product name:Optical windows Diameter:0.5-500mm tolerance:+/-0.1mm ,+/-0.1mm Surface quality:60/40 ,40-20 or better Coating:without or with Anti-Reflective (AR) Coatings Clear Aperture:>90% bevel:protective chamfer:protective Roundness:0.003 Parallelism: Show More