A line of zinc selenide focusing lenses for heavy steel cutting lasers is available in 1–2 in. OD sizes with thicknesses from 0.250 to 0.380 in. and focal lengths from 3 to 10 in. in 0.5 in. increments. They are optimized for 10.6 μm for use with 200 W to 4 kW CO2 cutting lasers.
Laser Research Optics