Daily Archives: May 5, 2019

SAPPHIRE & RUBY BALLS HEMISPHERES

Sapphire & Ruby Spheres

A broad range of sapphire and ruby balls that can be precision ground into lenses with short focal lengths for use in micro air vehicle operations has been introduced by Meller Optics, Inc. of Providence, Rhode Island. Meller Sapphire and Ruby Balls feature 9 Mohs hardness, which is second only to diamond, and are unaffected […]