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Design of the first-generation wavefront sensor and actuator geometry for the 6.5-m MMT adaptive optical system

机译:6.5米MMT自适应光学系统的第一代波前传感器和执行器几何设计

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Abstract: A description is given for the geometry of the first generation adaptive-optical (AO) system being developed for the 6.5m single-mirror telescope that will replace the Multiple Mirror Telescope on Mt. Hopkins. The AO system consists of an adaptive secondary mirror with 330-actuators and a wave front senor composed of a 13 by 13 square subaperture array. The deformable mirror actuator vibrational modes were determined from a finite element model of the adaptive-secondary mirror. Numerical simulations in based on the finite element results were carried out to determine the expected performance of the system. Two reconstruction algorithms were compared - a least squares reconstructor and a modal equalization technique developed for this AO geometry. Strehl ratios are reported for the two algorithms for various guide star magnitudes and number of corrected wave front modes. !22
机译:摘要:描述了为6.5m单镜望远镜开发的第一代自适应光学(AO)系统的几何结构,该系统将取代Mt上的多镜望远镜。霍普金斯。 AO系统由一个带有330个执行器的自适应辅助反射镜和一个由13 x 13方形子孔径阵列组成的波前传感器组成。可变形反射镜致动器的振动模式是从自适应辅助反射镜的有限元模型确定的。基于有限元结果进行了数值模拟,以确定系统的预期性能。比较了两种重建算法-最小二乘重建器和为此AO几何开发的模态均衡技术。报告了两种算法的斯特雷尔比,这些星速分别用于不同的制导星震级和校正后的波阵面模数。 !22

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