论文标题
天文学的多种轭自适应光学器件
Multiconjugate Adaptive Optics for Astronomy
论文作者
论文摘要
自2000年以来，自适应光学（AO）已经看到了各种满足特定科学需求的新概念的出现。多形式自适应光学器件（MCAO）就是其中之一。通过使用多个波前传感器和层析成像相重建方法纠正3D中的大气湍流，MCAO的目标是在近红外的近红外图像中提供均匀的衍射有限图像，即大于1 Arcmin Square的视野，即比古典单一共轭AO在区域大的10至20倍。在这篇综述中，我们简要提醒了AO的原则和局限性，然后重点介绍MCAO的方面，例如层析成像和特定的MCAO错误来源。我们介绍了过去或当前系统的示例和结果：MAD（多形偶联的自适应光学演示器）和GEMS（Gemini McAo系统）用于夜间天文学和AO系统，在Big Bear，用于太阳天文学。我们检查了MCAO性能（在MCAO的情况下，h频段最高为40％，最大宽度为52 MAS），特别关注光度和星体的准确性，并考虑到非常大的望远镜和高级时代的MCAO未来的考虑。
Since the year 2000, adaptive optics (AO) has seen the emergence of a variety of new concepts addressing particular science needs; multiconjugate adaptive optics (MCAO) is one of them. By correcting the atmospheric turbulence in 3D using several wavefront sensors and a tomographic phase reconstruction approach, MCAO aims to provide uniform diffraction limited images in the near-infrared over fields of view larger than 1 arcmin square, i.e., 10 to 20 times larger in area than classical single conjugated AO. In this review, we give a brief reminder of the AO principles and limitations, and then focus on aspects particular to MCAO, such as tomography and specific MCAO error sources. We present examples and results from past or current systems: MAD (Multiconjugate Adaptive Optics Demonstrator) and GeMS (Gemini MCAO System) for nighttime astronomy and the AO system, at Big Bear for solar astronomy. We examine MCAO performance (Strehl ratio up to 40percent in H band and full width at half maximum down to 52 mas in the case of MCAO), with a particular focus on photometric and astrometric accuracy, and conclude with considerations on the future of MCAO in the Extremely Large Telescope and post-HST era.
