Plano-Convex Cylindrical lenses have a positive focal length, which makes them ideal for collecting and focusing light for many imaging applications Specifiction of our cylinderical lens as follow: * Material BK7 or other optical materials * Dimension Tolerance + 0.0~ -0.1mm * Center Thickness + / -0.1mm * Focal Length Tolerance+ / -1% * Surface Quality: 20/ 10 * Surface Figure » / 2 at 633nm on plano side * Clear Aperture > 90% * Chamfer 0.25mm at 45 degree typical * Coating Optional