For further information or to discuss your individual requirement, please contact
We are committed to focusing on our customer's specific needs.
We most likely have done something similar in the past, and we we look forward to every new challenge.

​​Ordering/Part Numbers

​Beryllium windows can be ordered with different configurations.​​

​Available Window Sizes: 
4", 6," 8", 10"

Available Coatings:
Duracoat, Boron Nitride, or no coating

​View Transmittance Curves

Customer specifies window opening length and width in millimeters (mm), as well as beryllium thickness in microns (um).

​See example below:​
​To order a 10 Inch Beryllium window, with an opening length of 10mm, an opening width of 40mm with a beryllium thickness of 250 microns, and a baron nitride coating, the part number would be:

Beryllium Windows

​ADC produces beryllium window assemblies that incorporate state-of-the-art bonding of beryllium to OFHC copper. These assemblies typically include TIG-welded lengths of stainless steel pipe and vacuum flanges. 
Better beryllium foil surface finish and/or customization is available upon request.


Standard Surface Finish: is ~ 1.0 micrometer Ra​
Vacuum Tested: Better than 5 x 10 –10 torr 
Leak Rate: Less than 2 x 10 –10 mbar-l / Sec