Cylindrical lens Material: flint glasses, UV-fused silica, Infrared fused silica, CaF2, Ge, ZnSe, Si, etc. Focal length:í+5mm-- í+1000mmí+1% (test by TIROPTICS OPTOMATIC2000 made in German) Length: 2mm-3mm í+0.1mm Width: 2mm-150mmí+0.1mm Tc tolerance:í+0.2mm Centration: 3-5' Surface accuracy: ª-/2 Surface quality: 40/20 Clear aperture: 90% Coating: custom design