Sapphire Windows are glass with parallel surfaces used to enable optical radiation to pass from one environment to another without allowing environments to mix. Material, transmission, scattering, wavefront distortion,damage threshold and resistance to certain environments should be considered when selecting windows.
Specifications:

• Dimensional tolerance ±0.1mm
• hickness tolerance ±0.1mm
• Surface quality 80-50 S/D
• Surface flatness 1L@633nm
• Parallelism 3 arcmin
• Protective bevel 0.25mm x45deg