The portable adaptive optics (PAO) device is a low-cost and compact system, designed for 4- meter class telescopes that have no adaptive optics (AO) system, because of the physical space limitation at the Nasmyth or Cassegrain focus and the historically high cost of conventional AO. The initial scientific observations of the PAO are focused on the direct imaging of exoplanets and sub-stellar companions. This paper discusses the concept of PAO and the associated high-contrast imaging performance in our recent observational runs. PAO deliver a Strehl ratio better than 60% in H band under median seeing conditions of 1″. Combined with our dedicated image rotation and subtraction (IRS) technique and the optimized IRS (O-IRS) algorithm, the averaged contrast ratio for a 5 ≤ V _mag ≤ 9 primary star is 1.3 10⁻⁵ and 3.3 10⁻⁶ at angular distance of 0.36″ with exposure time of 7 minutes and 2 hours, respectively. PAO has successfully revealed the known exoplanet of κ And b in our recent observation with the 3.5-meter ARC telescope at Apache Point Observatory. We have performed the associated astrometry and photometry analysis of the recovered κ And b planet, which gives a projected separation of 0.984″ 0.05″, a position angle of 51.1 0.5 and a mass of . These results demonstrate that PAO can be used for direct imaging of exoplanets with medium-sized telescopes.

便携式自适应光学 (PAO) 设备是一种低成本且紧凑的系统，专为没有自适应光学 (AO) 系统的 4 米级望远镜而设计，因为 Nasmyth 或 Cassegrain 焦点的物理空间限制以及历史上最高的常规 AO 的成本。PAO 的初步科学观测集中在系外行星和亚恒星伴星的直接成像上。本文讨论了 PAO 的概念以及我们最近的观测运行中相关的高对比度成像性能。在1 英寸的中值视距条件下，PAO 在H波段提供优于 60% 的 Strehl 比率。结合我们专用的图像旋转和减法 (IRS) 技术和优化的 IRS (O-IRS) 算法，5 ≤ V _mag的平均对比度≤ 9 的主星分别为 1.3 10 ^-5和 3.3 10 ^-6角距为 0.36″，曝光时间分别为 7 分钟和 2 小时。在我们最近使用 Apache Point 天文台的 3.5 米 ARC 望远镜进行的观测中，PAO 成功地揭示了κ和 b的已知系外行星。我们对回收的κ和 b 行星进行了相关的天体测量和光度测量分析，得出的投影间隔为 0.984" 0.05"，位置角为 51.1 0.5，质量为. 这些结果表明，PAO 可用于使用中型望远镜对系外行星进行直接成像。