Metalized Ge window is applied in the packaging of infrared focal plane imaging detector. Specifications Material: Optical grade Ge, monocrystalline Dimension tolerance: +/- 0.1mm Parallelism: 3 are minutes Surface quality: 60-40 Surface accuracy: 3 fringes Coating Optical coating: T > 90% @ 8um-12um，T < 1% @ 1-7um Metalizing coating: Within 2mm from the edge, metalizing coating (Ti/Ni/Au or Cr/Ni/Au)