These 0.5” (12.7 mm) diameter chrome steel balls are Grade 5, the best quality available as a commodity item. The balls are round to 125 nm with a surface finish of 1.25 nm rms. The balls are near diffraction-limited convex mirrors with a reflectivity of about 65%. They are ideal for use with the PSM in transferring optical to mechanical datums, and vice versa to better than 1 µm. Typically, the balls are supported on the ends of lens posts used as kinematic mounts. Where the mounting surface is not horizontal, use the magnetic nests listed under ball/nest pairs.

Disclaimer: All specifications and prices are subject to change.