We supply aspherical lens.Specification of aspherical lens as follow:Material:BK7 or other optical materialSize:10mm-200mmFringes:lambda/2Center Thickness:15nm-25nmDispersion round:0.03mm-0.2mmCentration:3 arc minSurface Quality:60-40 Scratch/DigClear Aperture:90%Coating:Available upon Request