Rainbow Research Optics has been providing optics for the past 15 years to the commercial, laser, medical and defense markets.  They offer optical materials such as Borosilicate Glass, Bk7,UV Grade Fused Silica (SiO2)Calcium Fluoride (CaF2), Magnesium Fluoride (MgF2)Crystal QuartzSilicon (Si)Germanium (Ge)Zinc Selenide (ZnSe), and Zinc Sulfide (ZnS).  By clicking on any of the links above, you can view information as well as graphs for each material.  Or to view all of the optical capabilities, tools, products and coating options visit www.rainbowoptics.com.