用大型双筒望远镜进行斐索观测
Towards controlled Fizeau observations with the Large Binocular Telescope
摘要：
大型双筒望远镜干涉仪（LBTI）可以在焦平面上进行斐索干涉测量，它可以访问LBT完整的22.7米边缘到边缘基线的空间信息。这种模式以前曾被用于获得科学数据，但仅限于两束光束之间的光程差（OPD）不受控制的观测，导致科学探测器上的条纹不稳定。为了最大限度地提高科学回报，我们正在努力稳定OPD和倾斜变化，并使LBTI Fizeau模式优化和常规化。在这里，我们概述了LBTI的斐索模式的光学配置和我们的策略，调试这种观测模式。
英文摘要：
The Large Binocular Telescope Interferometer (LBTI) can perform Fizeau interferometry in the focal plane, which accesses spatial information out to the LBT's full 22.7-m edge-to-edge baseline. This mode has previously been used to obtain science data, but has been limited to observations where the optical path difference (OPD) between the two beams is not controlled, resulting in unstable fringes on the science detectors. To maximize the science return, we are endeavoring to stabilize the OPD and tip-tilt variations and make the LBTI Fizeau mode optimized and routine. Here we outline the optical configuration of LBTI's Fizeau mode and our strategy for commissioning this observing mode.
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