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

基于碳化硅变体的低密度衬底材料可能有潜力用作大型可变形镜的外壳材料。用于elt的仪器光学也将采用尺寸较大的光学器件，并且具有质量敏感性。通过采用现有的材料和组件并对其进行修改以满足欧洲ELT的要求，我们将展示一种具有成本效益和降低风险的技术优势。我们将证明，将碳化硅“夹”在二氧化硅等材料中，将为大型可变形镜壳的新概念带来技术优势。我们将分析应用的机械完整性，并演示使用表面传感传感器修改的现有压电致动器对表面位置和变形的控制。

Low density substrate materials based on silicon carbide variants may have the potential for use as a shell material for large deformable mirrors. Instrumentation optics for ELTs will also utilise optics of significant size, and will be mass-sensitive. By taking existing materials and components and modifying them to meet the demands of European ELT requirements we will demonstrate a cost-effective and risk-mitigating technological advantage. We will demonstrate that 'sandwiching' silicon carbide in a material such as silicon dioxide will lead to a technological advantage to a novel concept of large deformable mirror shell. We will analyse the mechanical integrity for the application and demonstrate control of the surface position and deformation using existing Piezo actuators modified with a surface sensing transducer.