Cryogenic miniature deformable mirror with position sensing

采用自适应光学（AO）的波前校正技术具有巨大的潜力，可以通过减少大气畸变对图像质量的影响来改善我们对望远镜的使用。未来的发展将包括在仪器中使用自适应光学，以实现对超大望远镜（ELT）大焦平面的成本效益。正在开发的FP6智能焦平面提案已经确定了这一要求，并且ELT的一些仪器研究强调需要校正焦平面的小的可选部分，而不是试图校正整个焦平面。我们建议开发技术，使微型变形镜的制造适用于低温仪器，并具有感测的变形镜表面的位置，以高精度的能力。我们将利用微型高频换能器的最新发展，并使用一种新的玻璃粘合技术来建立一个概念验证演示器。位置传感将使我们能够解决滞后效应，而新的粘合技术将使极薄的镜面板的使用成为可能。

The technique of wavefront correction using Adaptive Optics (AO) has enormous potential for improving our use of telescopes through reducing atmospheric distortion effects on image quality. Future developments will include the use of adaptive optics within instruments to enable cost effective access to the large focal planes of Extremely Large Telescopes (ELTs). There are proposals under development for FP6 Smart Focal Planes which have identified such a requirement and some instrument studies for ELTs are highlighting the need to correct for small selectable parts of the focal plane rather than attempt to correct the entire focal plane. We propose to develop technology to enable the manufacture of miniature deformable mirrors suitable for use in cryogenic instrumentation, and with the ability to sense the position of the deformable mirror surface to high accuracy. We will make use of recent developments in miniature high frequency transducers and use a novel glass bonding technology to build a proof of concept demonstrator. Position sensing will enable us to address hysteresis effects and the novel bonding technology will enable the use of extremely thin mirror face sheet.