Design of the Subaru laser guide star adaptive optics module
Design of the Subaru laser guide star adaptive optics module
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斯巴鲁激光导星自适应光学模块设计
DOI：
10.1117/12.551032
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Y. Minowa
中科院分区：
文献类型：
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作者：
Makoto Watanabe;H. Takami;N. Takato;S. Colley;M. Eldred;T. Kane;O. Guyon;M. Hattori;M. Goto;M. Iye;Y. Hayano;Y. Kamata;N. Arimoto;N. Kobayashi;Y. Minowa
斯巴鲁望远镜的激光引导星星自适应光学（AO）模块将安装在f/13.9红外Nasmyth焦点处，并在不改变焦比的情况下为科学仪器提供补偿图像。光学元件安装在光具座上，并且消除了取决于望远镜指向的弯曲。科学仪器的转移视场为2弧分直径，但2.7弧分直径的视场可用于倾翻倾斜感测。AO模块的科学路径包含五个反射镜，包括一对离轴抛物面反射镜和一个可变形反射镜。它还有三个额外的镜子作为图像旋转器。AO模块具有可见的188元件曲率波前传感器（WFS）和光子计数雪崩光电二极管（APD）模块。它使用单个激光器（LGS）或自然引导星星（NGS）在2弧分直径范围内测量波阵面的高阶项。AO模块还有一个可见的2 x 2子孔径Shack-Hartmann WFS，带有16个APD模块。当LGS用于高阶波前传感时，它通过使用2.7弧分直径视场内的单个NGS测量波前的倾斜和慢散焦项。该模块还具有红外2 x 2子孔径Shack-Hartmann WFS，可选择HgCdTe阵列。高阶和低阶可见光WFS都有自己的引导星星采集单元，带有两个转向折叠镜。AO模块还有一个震源模拟器。在0 km和6 km高度上，用两个湍流层同时模拟了LGS和NGS光束在有和无大气湍流情况下的等晕性和锥效应。
The laser guide star adaptive optics (AO) module for the Subaru Telescope will be installed at the f/13.9 IR Nasmyth focus, and provides the compensated image for the science instrument without change of the focal ratio. The optical components are mounted on an optical bench, and the flexure depending on the telescope pointing is eliminated. The transferred field of view for the science instrument is 2 arcmin diameter, but a 2.7 arcmin diameter field is available for tip-tilt sensing. The science path of the AO module contains five mirrors, including a pair of off-axis parabolic mirrors and a deformable mirror. It has also three additional mirrors for an image rotator. The AO module has a visible 188-element curvature based wavefront sensor (WFS) with photon-counting avalanche photodiode (APD) modules. It measures high-order terms of wavefront using either of a single laser (LGS) or natural guide star (NGS) within a 2 arcmin diameter field. The AO module has also a visible 2 x 2 sub-aperture Shack-Hartmann WFS with 16 APD modules. It measures tip-tilt and slow defocus terms of wavefront by using a single NGS within a 2.7 arcmin diameter field when a LGS is used for high-order wavefront sensing. The module has also an infrared 2 x 2 sub-aperture Shack-Hartmann WFS with a HgCdTe array as an option. Both high- and low-order visible WFSs have their own guide star acquisition units with two steering fold mirrors. The AO module has also a source simulator. It simulates LGS and NGS beams, simultaneously, with and without atmospheric turbulence by two turbulent layer at about 0 and 6 km altitudes, and reproduces the isoplanatism and the cone effect for the LGS beam.
斯巴鲁 LGS AO 激光系统设计
DOI：
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发表时间：
2004
期刊：
SPIE Proceedings 5490
影响因子：
--
作者：
Hayano;Y.
通讯作者：
Y.
斯巴鲁望远镜的激光导星 AO 项目
DOI：
--
发表时间：
2004
期刊：
SPIE Proceedings 5490
影响因子：
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作者：
Takami;H.;et al.
通讯作者：
et al.