Spectrosil WF Quartz Outer Window (Optistat CF/DN new style). A range of replacement fittings and accessories are available to help you change the optical configuration of your cryostat.
Spectrosil WF Quartz Outer Window (Optistat CF/DN new style) Spectrosil WF is a water free synthetic vitreous silica.
It has the same material characteristics as Spectrosil B, but has a transmission range which extends further into the IR. The transmission data is for a 2 mm thick window. Measuring 42mm diameter x 2mm thick