Thedomelens/hemispheredomewemanufacturedbeusedtoprotectthelensofunderwatercamera,whichcouldresistthepressureofwater,andgiveabestviewfieldtocatchpicture.Specificationofhemispheredomewecouldsuppliedasfollow:Materials:BK7glass,UVfusedsilicaetc.,varioustypesofopticalglass.Diameter:from10to250mm.DiameterTolerance:0.1mm,standard;0.01mm-attainable.SurfaceQuality:60/40Scratch/Dig,standard;20/10Scratch/Dig,attainabledependingonmaterialtypeandcombinationofotherparameters.Power/Irregularity:5/1(interferencefringes),standard;0.5/0.1(interferencefringes),attainabledependingonmaterialtypeandcombinationofotherparameters.Aperture60deg.Decentration:0.05mm,standard;0.01,attainable.)