标题： 磁性和光控驱动的光磁致变形镜在波前控制中的演示 显示英文标题

标题： Demonstration of magnetic and light-controlled actuation of a photomagnetically actuated deformable mirror for wavefront control

摘要： 可变形反射镜（DMs）在天文成像、激光通信和视觉科学等领域有广泛的应用。 然而，它们通常需要笨重的多通道电缆来为其驱动执行器提供高功率。 一种低功耗的可变形反射镜，以非接触方式驱动，可以为这个问题提供一个可能的替代方案。在此，我们提出了一种光磁驱动的可变形反射镜（PMADM）概念，该反射镜通过永磁体和低功率激光加热源以非接触方式驱动。 本文展示了原型光学表面质量的实验室演示、焦点的磁控制以及其精确光控制的COMSOL仿真。 PMADM原型由一种磁性复合材料（聚二甲基硅氧烷[PDMS] + 铁磁性$\text{CrO}_\text{2}$）和一个光学质量的基板层组成，尺寸为30.48 mm$\times$30.48 mm$\times$175$\mu$m，光学孔径直径为8 mm。 当受到0.12 T的磁通密度时，它会变形为5.76$\mu$m，并在50 mW激光照射下恢复为3.76$\mu$m。 考虑到3倍的安全系数，估计其最大行程为8.78$\mu$m，在失效前。 这项工作还包括使用PMADM生成散光的仿真，这是展示高阶模式控制的第一步。 一个完全开发的PMADM在真空和空间环境中的波前校正方面具有潜在的应用前景。 显示英文摘要

摘要： Deformable Mirrors (DMs) have wide applications ranging from astronomical imaging to laser communications and vision science. However, they often require bulky multi-channel cables for delivering high power to their drive actuators. A low powered DM which is driven in a contactless fashion could provide a possible alternative to this problem.Here, we present a photo-magnetically actuated deformable mirror (PMADM) concept which is actuated in a contactless fashion by a permanent magnet and low power laser heating source. This paper presents the laboratory demonstration of prototype optical surface quality, magnetic control of focus, and COMSOL simulations of its precise photo-control. The PMADM prototype is made of a magnetic composite (polydimethylsiloxane [PDMS] + ferromagnetic $\text{CrO}_\text{2}$) and an optical-quality substrate layer and is 30.48 mm $\times$ 30.48 mm $\times$ 175 $\mu$ m in dimension with an optical pupil diameter of 8 mm. It deforms to 5.76 $\mu$ m when subjected to a 0.12 T magnetic flux density and relaxes to 3.76 $\mu$ m when illuminated by a 50 mW laser. A maximum stroke of 8.78 $\mu$ m before failure is also estimated considering a 3x safety factor. This works also includes simulation of astigmatism generation with the PMADM, a first step in demonstrating control of higher order modes. A fully developed PMADM can have potential application for wavefront corrections in vacuum and space environments.