Focusing lens element LFAS series

sphericalglassaspherical

Compared to a conventional spherical lens, the most significant advantage of the aspherical lens is that it can perform spherical aberration correction. The aspheric lens allows the designer to correct the aberration with fewer optical lenses than the spherical lenses, so the optical system can be lower at cost and more compact in size. Diameter Tolerance: +0/-0.13mm Thickness Tolerance: ±0.25mm Focal Length Tolerance: ±2% Edge Thickness Variation (ETV): ≤ 3 arc min Clear Aperture: >90% Aspheric Accuracy: ≤1µm P-V Surface Quality: 40-20 S-D AR Coating: R<0.2% per surface @ 1030-1090nm Material: Fused Silica, Suprasil 313, Corning 7980