IRG206 Chalcogenide Glass Spherical Lens / Ball Lens
IRG206 is a high-refractive-index chalcogenide infrared glass (n₁₀.₆ ≈ 2.7764, ν₁₀.₆ ≈ 137.7) with excellent transmission in the 0.8–19 μm band, especially the LWIR 8–12 μm atmospheric window. IRG206 spherical lenses offer strong converging power and low dn/dT, making them ideal for passive athermalized LWIR/MWIR imaging systems. Compared to Germanium, IRG206 is lower cost, moldable into aspheres,