用于日冕照相和干涉测量的交叉立方体零器的实验验证
Experimental demonstration of a crossed cubes nuller for coronagraphy and interferometry
摘要:
本文介绍了一种基于一对交叉分束棱镜的新型消色差移相器--交叉棱镜零陷器(CCN)的首次实验结果。我们审查的CCN的一般原则,现在仅限于两个干涉输出,以实现更好的性能,并描述了在我们的实验室开发的实验装置。它便宜、紧凑、易于对齐。结果表明,在单色光的高消光率,并确认该设备是不敏感的偏振状态。最后,从实验的第一个教训进行了总结和讨论,在未来的空间任务寻找太阳系外行星位于宜居带,无论是基于日冕望远镜或稀疏孔径调零干涉仪
英文摘要:
In this communication we present the first experimental results obtained on the Crossed-cubes nuller (CCN), that is a new type of Achromatic phase shifter (APS) based on a pair of crossed beamsplitter cubes. We review the general principle of the CCN, now restricted to two interferometric outputs for achieving better performance, and describe the experimental apparatus developed in our laboratory. It is cheap, compact, and easy to align. The results demonstrate a high extinction rate in monochromatic light and confirm that the device is insensitive to its polarization state. Finally, the first lessons from the experiment are summarized and discussed in view of future space missions searching for extra-solar planets located in the habitable zone, either based on a coronagraphic telescope or a sparse-aperture nulling interferometer
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