Accurate Fan Angle: 5, 10, 15, 20, 30, 45, 53, 60, 70, ... line. At present our Powell Lens are available in fan angles of 5°, 10°, 15°, 20°, 30°, 45°, 53°, 60 ... vision systems, construction and process control.Standard ProductsPart No.Fan AngleMaterial (nd)Input Beam DiameterLine Intensity UniformityCoatingPWL1030DN30°BK7 ( ... 36-3.6mm; 40-4.0mm; 50-5.0mm; 70-7.0mmBB: Fan angle05-5°; 10-10°; 15-15°; 20-20 ...