Aluminized Mylar Outer Window (Optistat CF/DN new style) and mount.
Aluminised Mylar™ is a useful window for X-ray and gamma ray applications. For X-rays its transmission is greater than 90% with some diffuse scattering at low angles. Standard windows are 125 µm thick with a 0.3 µm thick aluminium coating on one side. Thin film window 0.127mm thick, in mount measuring 42mm diameter