Laser Research Optics offers a line of replacement ZnSe optics for CO2 lasers made by a variety of manufacturers. The lenses are supplied with 0.5- to 2.5-in. diameters and metric sizes in planoconvex, planoconcave and meniscus configurations. Focal lengths range from 1 to 25 in. in 0.5-in. increments. The lenses are optimized for 10.6-µm radiation and offer <0.25% total absorption values. Designed for use with 25- to 200-W industrial lasers, they are available in a variety of thicknesses and with coatings to match specific phase and polarization requirements.