Rod Lenses are highly polished small diameter rods made of optically transparent homogeneous materials. A carefully controlled manufacturing process produces rods (or fibers) with precise diameters and unsurpassed surface quality. Optical performance is similar to a cylinder lens. Collimated light passing through the diameter of the rod will be focused into a line. We supply optical rod lens,specification of our rod lens as follow: Dimension Range: 3-50mm Polish on both sides,cylindrical side or all side Diameter tolerance:+0/-0.02mm Thickness tolerance:+/- 0.02mm Centration:<3 mins Surface quality: 40/20 Surface accuracy: 0.5-0.2 Clear aperture: >90% Chamfer: 0.1-0.25mm*45 degrees Coat:as requested Material:Float glass,K9 ,FS,SapphireSF11,CaF2,MgF2 or other optical glass