Metalized Ge Window

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)

Metalized Ge Window