Features of Large-Diameter Aspheric Lenses

Precision-Polished for Exceptional Performance

Large Diameters from 10 - 100 mm

Numerical Apertures from 0.23 - 0.619

Diffraction-Limited Performance

Low Dispersion Materials Minimize Chromatic Aberration

Superior Energy Beam Distribution

Corrected Wavefront Transmission: 20X to 50X Improvement Over Large-Diameter Molded Glass Aspheric Lenses

Thorlabs stocks precision-ground, large-diameter aspheric lenses from Asphericon. With diameters ranging from 10 mm to 100 mm, these aspheres are available with either high or low numerical aperture (NA). These aspheric lenses are manufactured using CNC grinding and polishing machines; for diameters in excess of 15 mm this produces lenses with RMS wavefront errors that are typically 20 to 50 times less than a similarly sized molded aspheric lens. The lenses are constructed using S-LAH64, N-BK7, or B270 optical glass. Ohara's S-LAH64 optical glass is a low-dispersion glass with high index of refraction in order to minimize chromatic aberration.