AI 中文总结
该研究介绍凯克全天空精密自适应光学（KAPA）系统的架构与在轨表现，其采用4个激光导星实现激光层析成像，大幅降低波前误差，为下一代极大望远镜提供关键技术支撑。
AI 中文摘要
凯克全天空精密自适应光学（KAPA）项目对凯克I自适应光学系统进行升级，以利用4个激光导星（LGS）星群实现激光层析成像。KAPA目前已投入窄视场和宽视场两种模式运行，用于优化轴上或相机科学视场内的像差校正。4个LGS与层析重构器、伪开环控制结合使用，可显著降低波前误差。本文描述了整体架构、层析算法的开发、实时实现及初步在轨结果。通过将在轨图像质量与单个LGS（sLGS）获取的结果对比，明确展示了激光层析成像的优势，该技术对下一代极大望远镜的成功至关重要。
英文摘要
The Keck All Sky Precision Adaptive optics (KAPA) project upgrades the Keck I adaptive optics system to enable laser tomography using a four laser guide star (LGS) asterism. KAPA is now in operation in both narrow field and wide field modes to optimize correction on-axis or over the science field of view of the camera. The use of four LGSs, in conjunction with a tomographic reconstructor and pseudo open-loop control, leads to a significant reduction in wavefront error. We describe the overall architecture, development of the tomographic algorithm, real-time implementation and preliminary on-sky results here. By comparing the on-sky image quality with that obtained using a single LGS (sLGS) we clearly demonstrate the benefits of laser tomography, a technology which is crucial to the success of the next generation of extremely large telescopes.
CommentsPublished in SPIE proceedings. 14 pages, 13 figures
