论文标题
非公共路径像差校正
Non Common Path Aberrations Correction
论文作者
论文摘要
本论文的主要目标是在球仪器中纠正了无通用的路径差距，以帮助其满足其对比要求。 Sphere的目的是在附近的恒星周围搜索和表征巨型外卫星。作者实施了一种称为电场结合的方法，他在模拟和实际系统中进行了测试。在2014年6月的第二次委托之前的几天，在Sphere计划中预定了整整一周。它给了作者有机会前往智利的VLT，并直接在系统上进行实验。在中型区域中，另一个数量级的对比增益目标已成功达到，将SPHERE RAW SPECKLE对比度从$ 10^{ - 6} $到$ 10^{ - 7} $。因此，该算法已经证明了其价值，并将根据作者开发的代码进行进一步调查并希望由Sphere团队自动化。但是，重要的是要记住，电场结合对后续研究更有效，以提高观察质量。确实，进行良好校正的区域非常有限。除非校正后的区域足够大，否则它不能用于Exo-wellanets发现，但性能会更低。
The primary goal of this thesis was the correction of Non-Common-Path-Aberrations in the SPHERE instrument for helping it meeting its contrast requirements. SPHERE's purpose is the search and characterization of giant exo-planets around nearby stars. The author implemented a method called Electric Field Conjugation that he tested in simulation as well as on the real system. A full week was booked in SPHERE schedule a few days before the second commissioning in June 2014. It gave the opportunity to the author to travel to the VLT in Chile and experiment directly on the system. The contrast gain objective of another order of magnitude in a medium-sized area has successfully been reached bringing SPHERE raw speckle contrast from about $10^{-6}$ to $10^{-7}$. The algorithm has therefore proven its value and will be further investigated and hopefully automated by the SPHERE team based on the codes developed by the author. However it is important to keep in mind that Electric Field Conjugation is more effective for follow-up studies in order to improve the quality of the observations. Indeed the area for a good correction is very limited. It can't be used for exo-planets discovery unless the corrected area is made big enough but the performance will be less.
