Thorsten Döhring: Counterbalancing iridium coating stress for astronomical
X-ray mirrors

Based on their excellent reflection properties iridium coatings are
considered for grazing incidence mirrors in spaceborn astronomical X-ray
telescopes. However, the applied iridium layers often suffer from high
coating stress. In collaborations between Aschaffenburg University and the
French Institute Fresnel methods for stress compensation have been
developed. Experimental results as well as some theoretical background
will be presented.