Custom medical sapphire optics are fabricated to specifications as balls from 0.005 to 0.5 in. diameter, plano-convex and -concave lenses, windows from 0.5 to 6 in. diameter, as well as rectangles, squares, cones, and domes. Extremely durable, chemically inert, and capable of transmitting from the UV through 4.7 µm, they can be produced with wedges, precise mounting holes and steps, and can be brazed or sealed to stainless steel or Kovar.