Spectral Systems offers the most comprehensive selection of windows for IR sampling. Our windows are the highest quality in the industry providing exceptional spectral results. When combined with our broad range of options for materials, sizes, coatings and wedged or parallel surfaces, Spectral Systems is your one stop shop for all your application needs.
Germanium (Ge) is a high refractive index material (4.0 @ 10 microns) with good long wavelength transmission in the infrared spectral region. At elevated temperatures the free carrier absorption becomes important and at 200 °C it is almost opaque. The high refractive index of Ge limits transmission in applications where an anti-reflective coating cannot be used.View Product