Spherical Lens PARAMETER: Sphertical Lens Plano Convex Lens are positive focal length elements that have one spherical surface and one flat surface. These lenses are designed for infinite conjugate (parallel light) use or simple imaging in non-critical applications. These optic lenses are ideal for all-purpose focusing elements. BRD Optical Manufactures Plano Convex Lens  Plano Convex Lens Exporter:ChangChun BRD Optical co., Ltd Specification: Material Optical grade   glass/ Fused Silica/ Sapphire Diameter 2mm~300mm Diameter   Tolerence ±0.05mm~±1mm Surface   Quality 80/50, 60/40,   40/20, 20/10, 10/5 Surface   Accuracy λ~λ/20 Centration 3 arc min~30   arc sec. Coating As per customer's   request