Available with A/R coatings for visibility to 10.6 microns, UAV Optics feature round sapphire lenses from 0.25 in. up and partial spheres as small as 0.12 in. with varying focal lengths. Also offered in zinc selenide from 0.25 in. up, UAV Optics can incorporate stepped edges and other special characteristics for mounting such as slots or wedges. Flatness can be held to 1/10th wave per inch in visible with surface finishes from 60-40 to 40-20 scratch-dig.