Specification of our plano-convex spherical lenses as follow:
Material:Bk7,fused silica,CaF2,MgF2,BaF2,ZnSe infrared optical crystals.
Focal length:+/-1%
Length tolerance:+0.0 - -0.1mm
Width tolerance:+0.0 - -0.1mm
Center thickness tolerance:+/-0.1mm
Surface Figure:lambda/2 at 633nm on plano side
Surface quality:60-40 stratch/dig
Clear Apenture>90%
Chamfer:0.25mm at 45 degree typical
Coating:optional