Germanium Transmission Chart:
The absorption of Germanium increases with temperature. The obvious transmission degradation of Germanium material starts at about 100 ℃, and accelerates the degradation between 200 ℃ and 300 ℃, which may lead to catastrophic failure of the optical fiber. Due to the high reflectivity of the substrate surface, AR coated or DLC coated are widely used on Germanium's surfaces.
Germanium with AR&DLC@7-14μm Transmission Chart:
Yutai Optics can provide Ge blanks with diameters ranged from 7 mm to 300 mm and thicknesses from 0.8 mm to 40 mm. The rectangular blank has a size of 200 mm x 200 mm and a thickness of up to 100 mm. The resistivity is 5-40 Ω/m2. We can produce curved blanks with diameters from 15 mm to 200 mm. The diameter tolerance can be accurate to 0.03 mm (0.1 mm is the standard diameter tolerance). Prism, lens, window and other optical components can be customized according to customers’ specifications and drawings.
Highly recommended Germanium Optics from Yutai Optics:
D3-10mm mirco Ge lens,
Big(Dia>100mm) Ge windows.