Aspheric Lens We provide product customization services. Optical Lens: Convex lens, concave lens, achromatic lens, cylindrical lens, aspherical lens etc. General parameters:   Material Fused silica,H-K9L,H-ZF2 Caf2, etc. Center tolerrance ±10",±15",±30",±60",±2' etc. Size range 5mm-350mm Roughness <30nm,<20nm,<10nm etc....