IXO mirror module prototype with silicon pore optics
This is an early prototype mirror module, built in 2007, for the International X-ray Observatory (IXO).
Silicon wafers, which have been diced into plates, ribbed and wedged are stacked into a high performance pore optics (HPO) unit using a fully automated stacking robot. Two such HPO are aligned to
Note the high reflectivity of the surface of the silicon plates, made from standard commercially available 12" wafers with a roughness better than 0.4 nm rms.
IXO was an L-class candidate mission in ESA's Cosmic Vision programme that was studied between 2007 and 2011.