Extreme adaptive optics system optimization with the high order test bench
Extreme adaptive optics system optimization with the high order test bench
复制标题
通过高阶测试台进行极端自适应光学系统优化
DOI：
10.1117/12.670183
复制
发表时间：
2006
影响因子：
7.7
通讯作者：
R. Myers
中科院分区：
文献类型：
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作者：
É. Vernet;M. Kasper;C. Vérinaud;E. Fedrigo;S. Tordo;N. Hubin;S. Esposito;E. Pinna;A. Puglisi;A. Tozzi;A. Basden;S. Goodsell;G. Love;R. Myers
目前正在为大多数8-10米望远镜开发用于搜寻太阳系外行星的极端自适应光学系统。大量的计算机模拟表明，夏克-哈特曼和金字塔波前传感器提供高斯特列尔比校正预期从极端自适应光学的能力，但很少有实验已经实现到目前为止。高阶测试台在澳门测试台上实现了极端自适应光学，并通过星星和湍流发生器再现了真实的望远镜条件。一个32×32驱动器微变形镜，一个金字塔波前传感器，一个Shack-Hartmann波前传感器，ESO斯巴达真实的时间计算机和一个本质上读噪声自由的电子倍增CCD 60（E2 V CCD 60）提供了一个理想的茧，以研究两种类型的波前传感器在线性度、对校准误差的灵敏度、噪声传播、具体问题的金字塔或夏克哈特曼波前传感器等，我们将描述这个测试台的整体设计，并将重点放在两个重要的子系统的特性：微变形镜和相位屏幕。
Extreme adaptive optics systems dedicated to the search for extrasolar planets are currently being developed for most 8-10 meter telescopes. Extensive computer simulations have shown the ability of both Shack-Hartmann and pyramid wave front sensors to deliver high Strehl ratio correction expected from extreme adaptive optics but few experiments have been realized so far. The high order test bench implements extreme adaptive optics on the MACAO test bench with realistic telescope conditions reproduced by star and turbulence generators. A 32×32 actuator micro deformable mirror, one pyramid wave front sensor, one Shack-Hartmann wave front sensor, the ESO SPARTA real time computer and an essentially read-noise free electron multiplying CCD60 (E2V CCD60) provide an ideal cocoon to study the different behavior of the two types of wave front sensors in terms of linearity, sensitivity to calibration errors, noise propagation, specific issues to pyramid or Shack-Hartmann wave front sensors, etc. We will describe the overall design of this test bench and will focus on the characterization of two essential sub-systems: the micro deformable mirror and the phase screens.