optical double concave spherical lens

We supply optical spherical lenses,include plano-convex spherical lens,plano-concave spherical lens,bi-convex spherical lens,bi-concave spherical lens,meniscus spherical lens,special spherical lens etc.. Specification of our plano-convex spherical lenses as follow: *Material:BK7 or other materials *Focal length:+/-1% *Center thickness tolerance:+/-0.01mm *Centration:1 arc minutes *Surface Figure:lambda/2 at 633nm on plano side *Surface quality:40/20 stratch/dig *Clear