Infrared (IR) Diffusers are useful for creating even intensity distribution of broadband IR light sources. These ground diffusers are polished on one side and sandblasted on the other side to produce a rough surface that will scatter light. Infrared (IR) Diffusers are available in two versions. The calcium fluoride (CaF2) substrate has a transmission range from 0.3 to 8.0 microns and the zinc selenide (ZnSe) substrate has transmission range from 0.6 to 12.0 microns. Infrared (IR) Diffusers are ideal for a variety of applications including FTIR systems, laser calibration systems, and illuminator diffusion.