标题： 宽视场成像干涉仪试验台II：实现、性能与计划 显示英文标题

标题： Wide-field Imaging Interferometry Testbed II: Implementation, Performance, and Plans

摘要： 广域成像干涉仪试验台（WIIT）将为开发基于空间的干涉仪提供有价值的信息。 该实验室仪器在光学波长下运行，并提供了测试干涉数据操作算法和技术以减少数据的能力。 在这里，我们介绍系统设计和实现的一些细节，讨论到目前为止系统的整体性能，并提出WIIT未来发展的计划。 为了最好地利用这个系统获得的干涉数据，限制系统内的不确定性并准确理解可能的误差来源至关重要。 WIIT的设计通过多个辅助系统满足这些标准。 WIIT最重要的特点之一是使用冗余计量系统，它可以提供优于10纳米的延迟线位置知识。 使用光功率检测器来监测光源的亮度，以确保亮度的小波动不会影响整体性能。 我们在仪器的关键部件和光学平台上放置了温度传感器，以评估环境对系统的影响。 这些系统的使用为我们提供了总体系统不确定性的估计，并允许我们对到目前为止的结果进行全面表征。 这些估计使我们可以继续前进，为二维干涉测量增加旋转平台。 此外，它们还提出了系统改进的可能途径。 WIIT的资金由NASA总部通过ROSS/SARA项目以及戈达德航天中心通过IR&D项目提供。 显示英文摘要

摘要： The Wide-Field Imaging Interferometry Testbed (WIIT) will provide valuable information for the development of space-based interferometers. This laboratory instrument operates at optical wavelengths and provides the ability to test operational algorithms and techniques for data reduction of interferometric data. Here we present some details of the system design and implementation, discuss the overall performance of the system to date, and present our plans for future development of WIIT. In order to make best use of the interferometric data obtained with this system, it is critical to limit uncertainties within the system and to accurately understand possible sources of error. The WIIT design addresses these criteria through a number of ancillary systems. The use of redundant metrology systems is one of the most important features of WIIT, and provides knowledge of the delay line position to better than 10 nm. A light power detector is used to monitor the brightness of our light sources to ensure that small fluctuations in brightness do not affect overall performance. We have placed temperature sensors on critical components of the instrument, and on the optical table, in order to assess environmental effects on the system. The use of these systems provides us with estimates of the overall system uncertainty, and allows an overall characterization of the results to date. These estimates allow us to proceed forward with WIIT, adding rotation stages for 2-D interferometry. In addition, they suggest possible avenues for system improvement. Funding for WIIT is provided by NASA Headquarters through the ROSS/SARA Program and by the Goddard Space Flight Center through the IR&D Program.