Torr Scientific Ltd, founded in 1998 in United Kingdom, manufactures and supplies a full range of UHV (ultra high vacuum) components including custom products all over the world: 

Vacuum optics - viewports, anti-reflective coating, CVD-diamonds

X-ray & Electron Optical (XEO) - X-ray anodes, in-line monochromator, electron optical components, delay line and neutron detectors