Germanium Windows

Specifications:
Material: ....................................................................Ge
Dimension Tolerance: .....................................+/-0.1mm
Thickness Tolerance: ......................................+/-0.1mm
Surface Accuracy: ......................................................λ/4
Surface Quality: ....................................................60-40
Parallelism: ...............................................................<1'
Clear Aperture: .....................................................>90%
Bevelling: ........................................................0.2×45°
Coating: .................................................Custom Design