Development of key adaptive mirror technologies for the European Extremely Large Telescope (ELT)

低应力粘合在将致动器和支撑结构附接到镜面以最小化印透效应方面提供了显著的技术优势。氢氧化物催化键合产生高强度共价键，具有大于2.5MPa的持续剪切应力。可实现的极薄粘合线（~ 100 nm）应能为项目的表面传感方面提供良好的声耦合。我们将建立在该部门内进行的研究工作，该部门已经确定了结合技术对碳化硅是可行的，并将这些知识应用于可变形镜所需的特定材料，这些材料的使用可能对未来的极大望远镜（ELT）具有重要意义。

Low stress bonding provides a significant technological advantage in attaching actuators and support structure to mirror surfaces to minimise the effects of print through. Hydroxide catalysis bonding produces a high strength covalent bond with demonstrated sustained shear stresses of greater than 2.5MPa. The extremely thin bond lines achievable (~100nm) should enable good acoustic coupling for the surface sensing aspect of the project. We will build on research work carried out within the department which has established that the bonding technology is viable with silicon carbide and apply this knowledge to the specific materials required for deformable mirrors whose use could be of high significance for future Extremely Large Telescopes (ELTs).