标题： 凯克I望远镜的迈克尔逊干涉术 显示英文标题

标题： Michelson Interferometry with the Keck I Telescope

摘要： 我们报告了首次在凯克I望远镜上使用迈克尔逊干涉仪进行近红外JHK和L波段衍射极限成像的应用。通过使用位于f/25次镜附近的孔径掩模，凯克主镜（直径10米）被转化为一个分立元件的多孔径干涉仪。这使得大量明亮的天体物理目标实现了衍射极限成像，包括围绕若干演化星复杂的几何尘埃包层。这些图像的成功恢复，动态范围超过200:1，突显了稀疏孔径成像相对于更传统的填充孔径散斑成像在处理此类明亮目标时的重要能力。特别是由于大气噪声减少导致的傅里叶数据信噪比增强，与散斑方法相比，可以相对较少的短曝光图像实现复杂源的高保真成像。多期观测数据证实了该成像技术的可靠性，而我们的整个数据集则展示了当与当前一代大型望远镜结合时，孔径掩模方法的强大能力。这些新成果与最近干涉仪和自适应光学领域的进展之间的关系也进行了简要讨论。 显示英文摘要

摘要： We report the first use of Michelson interferometry on the Keck I telescope for diffraction-limited imaging in the near infrared JHK and L bands. By using an aperture mask located close to the f/25 secondary, the 10 m Keck primary mirror was transformed into a separate-element, multiple aperture interferometer. This has allowed diffraction-limited imaging of a large number of bright astrophysical targets, including the geometrically complex dust envelopes around a number of evolved stars. The successful restoration of these images, with dynamic ranges in excess of 200:1, highlights the significant capabilities of sparse aperture imaging as compared with more conventional filled-pupil speckle imaging for the class of bright targets considered here. In particular the enhancement of the signal-to-noise ratio of the Fourier data, precipitated by the reduction in atmospheric noise, allows high fidelity imaging of complex sources with small numbers of short-exposure images relative to speckle. Multi-epoch measurements confirm the reliability of this imaging technique and our whole dataset provides a powerful demonstration of the capabilities of aperture masking methods when utilized with the current generation of large-aperture telescopes. The relationship between these new results and recent advances in interferometry and adaptive optics is briefly discussed.