Balls and lenses
Precision sapphire, ruby, quartz, and glass balls and plano-convex lenses can be used for laser focusing and fiberoptic applications. The balls have 20/10 scratch-dig surface finishes and surface figures accurate to half a fringe at 633 nm. Spherical to within one-ten-thousandth of an inch, the balls can be precision ground into lenses with radii of curvature as large as half their diameters. The balls are available in both English and metric sizes ranging from 0.015 to 0.750 in. or 0.5 to 7.0 mm.
Meller Optics, Providence, RI
Circle 323