plano convex cylindrical lens Material: flint glasses, UV-fused silica, Infrared fused silica, CaF2, Ge, ZnSe, Si, etc. Focal length:¡À5mm-- ¡À1000mm¡À1% (test by TIROPTICS OPTOMATIC2000 made in German) Length: 2mm-3mm ¡À0.1mm Width: 2mm-150mm¡À0.1mm Tc tolerance:¡À0.2mm Centration: 3-5' Surface accuracy: ¦Ë/2 Surface quality: 40/20 Clear aperture: 90% Coating: custom design