用混合可变磁阻致动器II构成的大幅面变形镜的性能：来自FLASH的初始实验室结果
Performance of Large-Format Deformable Mirrors Constructed with Hybrid Variable Reluctance Actuators II: Initial Lab Results from FLASH
摘要：
高效混合可变磁阻（HVR）致动器的进步是构建下一代大尺寸可变形反射镜（包括自适应次镜）的一项技术。荷兰应用科学研究组织（TNO）开发了一种新型的混合可变磁阻致动器，与传统类型的音圈致动器相比，该致动器需要大约75倍的功率来操作。我们提出了TNO的最新的19致动器原型变形镜，FLASH的实验室测试的初步性能结果。我们报告的致动器的交叉耦合，线性，滞后，自然形状平坦化，和漂移与Zygo干涉仪和一组四个电容传感器测量。我们还提出了结果的动态性能的FLASH上的亚毫秒的时间尺度，以估计这种技术的限制，高对比度成像自适应光学。我们确认，这项技术具有强大的潜力，用于在天空自适应次镜，而不需要主动冷却。
英文摘要：
Advancements in high-efficiency hybrid variable reluctance (HVR) actuators are an enabling technology for building the next generation of large-format deformable mirrors, including adaptive secondary mirrors. The Netherlands Organization for Applied Scientific Research (TNO) has developed a new style of hybrid variable reluctance actuator that requires approximately seventy-five times less power to operate as compared to the traditional style of voice-coil actuators. We present the initial performance results from laboratory testing of TNO's latest 19-actuator prototype deformable mirror, FLASH. We report the actuator cross-coupling, linearity, hysteresis, natural shape flattening, and drift as measured with a Zygo interferometer and a set of four capacitive sensors. We also present results of the dynamic performance of the FLASH on sub-millisecond timescales to estimate the limits of this technology for high-contrast imaging adaptive optics. We confirm that this technology has strong potential for use in on-sky adaptive secondary mirrors without the need for active cooling.
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