Product list Lenses Optical prisms Optical filters Optical filters Optical mirrors Optical windows Optical components We can produce as customers' request, like plano-concave lens, plano-convex lens, double-concave lens, meniscus lens, achromatic lens, triplet lens and rod lens. The used materials include bk7, sf11, uv-fused silica, and caf2, etc. Example. Specifications: Materials:bk7, fused silica, ge, si, caf2... Diameter:1.5300mm Diameter tolerance:+/-0.02 mm Thickness tolerance:0+/-0.02mm Centring error