Vacuum-Optics Extended Range Viewports

Angle & Material

We offer a range of UHV viewports with extended transmission range materials. Available materials are: calcium fluoride, magnesium fluoride, zinc selenide, crystal quartz & germanium.
Anti-reflective coatings can also be applied to order.

• UHV compatible.

Window : See table
Flanges : 304 / 316 St.St.

Max. Bakeout Temperature* : 
CF flanged viewports : 200°C
AR Coated viewports : 150°C

Max. Thermal Gradient : 25°C per minute

Optical properties
Parallelism : <3 arc minutes
Flatness : See table measured as λ/? @ 632nm transmitted wavefront or λ/? @ 10 microns
Surface finish : See table measured as scratch/dig
* – Assembly rating is reduced to that of the lowest rated component.