The Subaru coronagraphic extreme AO (SCExAO) system: wavefront control and detection of exoplanets with coherent light modulation in the focal plane
The Subaru coronagraphic extreme AO (SCExAO) system: wavefront control and detection of exoplanets with coherent light modulation in the focal plane
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Subaru 冠状极端 AO (SCExAO) 系统：通过焦平面内的相干光调制对系外行星进行波前控制和检测
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发表时间：
2010
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通讯作者：
Takashi Yoshikawa
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作者：
O. Guyon;F. Martinache;V. Garrel;F. Vogt;K. Yokochi;Takashi Yoshikawa
斯巴鲁日冕极端- ao （SCExAO）系统是为小角度距离下的高对比度日冕成像而设计的，并计划于2011年初在斯巴鲁望远镜上看到第一次曙光。本文对SCExAO的波前控制体系结构进行了优化，以适应小角距散射光的控制和校准。SCExAO波前控制体系结构的关键子系统已经成功地演示了，我们报告了这些测试的结果，并讨论了它们在SCExAO系统中的作用。在这些子系统中，讨论了一种能够校准和去除传统上限制高对比度检测的静态和慢散斑的技术。斯巴鲁望远镜的一个可见光实验室原型系统最近展示了在22 λ/D范围内将斑晕降低到2e-7对比度，并将静态相干斑去除到3e-9对比度。
The Subaru Coronagraphic Extreme-AO (SCExAO) system is designed for high contrast coronagraphic imaging at small angular separations, and is scheduled to see first light on the Subaru Telescope in early 2011. The wavefront control architecture for SCExAO is optimized for scattered light control and calibration at small angular separations, and is described in this paper. Key subsystems for the SCExAO wavefront control architecture have been successfully demonstrated, and we report results from these tests and discuss their role in the SCExAO system. Among these subsystems, a technique which can calibrate and remove static and slow speckles which traditionally limit high contrast detections is discussed. A visible light lab prototype system at Subaru Telescope recently demonstrated speckle halo reduction to 2e-7 contrast within 2 2λ/D, and removal of static coherent speckles to 3e-9 contrast.