ShaneAO：利克天文台的宽科学谱自适应光学系统
ShaneAO: wide science spectrum adaptive optics system for the Lick Observatory
摘要：
一个新的高阶自适应光学系统目前正在加利福尼亚州的利克天文台谢恩3米望远镜上投入使用。该系统使用高返回效率的钠信标和低阶和高阶可变形反射镜的组合，以在覆盖0.8至2.2微米的红外科学波长的宽光谱上实现衍射限制成像。我们目前的设计性能目标和第一次在天空中的测试结果。我们讨论了几个创新，使该系统的下一代AO系统的探路者。其中包括独特的低音-高音扬声器控制，可提供从倾斜/倾斜到16个周期的全动态范围校正，可变光瞳采样波前传感器，UC Observatories开发的新的增强型银涂层，可提高科学和LGS吞吐量，以及紧密的机械刚度，可在LGS模式下实现多小时的衍射限制曝光，用于微弱物体光谱学科学。
英文摘要：
A new high-order adaptive optics system is now being commissioned at the Lick Observatory Shane 3-meter telescope in California. This system uses a high return efficiency sodium beacon and a combination of low and high-order deformable mirrors to achieve diffraction-limited imaging over a wide spectrum of infrared science wavelengths covering 0.8 to 2.2 microns. We present the design performance goals and the first on-sky test results. We discuss several innovations that make this system a pathfinder for next generation AO systems. These include a unique woofer-tweeter control that provides full dynamic range correction from tip/tilt to 16 cycles, variable pupil sampling wavefront sensor, new enhanced silver coatings developed at UC Observatories that improve science and LGS throughput, and tight mechanical rigidity that enables a multi-hour diffraction- limited exposure in LGS mode for faint object spectroscopy science.
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