Adaptive optics for high‐contrast imaging: pyramid sensor versus spatially filtered Shack–Hartmann sensor
Adaptive optics for high‐contrast imaging: pyramid sensor versus spatially filtered Shack–Hartmann sensor
复制标题
用于高对比度成像的自适应光学器件：金字塔传感器与空间滤波 Shack–Hartmann 传感器
DOI：
10.1111/j.1745-3933.2005.08638.x
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发表时间：
2005
影响因子：
--
通讯作者：
M. Carbillet
中科院分区：
文献类型：
--
作者：
C. Vérinaud;M. L. Louarn;V. Korkiakoski;M. Carbillet
在8m级望远镜和超大型望远镜(ELT)的框架下，比较了基于金字塔的高阶自适应光学(AO)和基于空间滤波的Shack-Hartmann高阶自适应光学(AO)。我们首先通过对8米声光辅助望远镜的端到端模拟，展示了每个传感器是如何处理混叠误差的，而混叠误差可能是高通量下的主要误差源。然后，针对光子噪声误差传播问题，研究了金字塔传感器相对于Shack-Hartmann传感器灵敏度增益的场依赖关系。根据这一分析，我们用一个分析模型研究了ELTS对类地系外行星探测的可见校正。
A comparison between pyramid-based and spatially filtered Shack–Hartmann-based high-order adaptive optics (AO) is presented in the framework of 8-m-class and extremely large telescopes (ELTs). We first show, with end-to-end simulations of an 8-m AO assisted telescope, how each sensor deals with the aliasing error, which may be the dominant error source at high flux. Then, focusing on photon noise error propagation, we study the field dependence of the sensitivity gain provided by the pyramid sensor with respect to the Shack–Hartmann sensor. From this analysis, we investigate, with an analytical model, visible correction on ELTs for detection of Earth-like exoplanets.