• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Conference on space telescopes and instrumentation >Coronagraphic wavefront sensing with COFFEE: high spatial-frequency diversity and other news
【24h】

Coronagraphic wavefront sensing with COFFEE: high spatial-frequency diversity and other news

机译：使用COFFEE进行冠状波波前传感：高空间频率分集和其他新闻

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The final performance of current and future instruments dedicated to exoplanet detection and characterization is limited by intensity residuals in the scientific image plane, which originate in uncorrected optical aberrations. In order to reach very high contrasts, these aberrations needs to be compensated for. We have proposed a focal-plane wave-font sensor called COFFEE (for COronagraphic Focal-plane wave-Front Estimation for Exoplanet detection), which consists in an extension of conventional phase diversity to a coronagraphic system. In this communication, we study the extension of COFFEE to the joint estimation of the phase and the amplitude in the context of space-based coronagraphic instruments: we optimize the diversity phase in order to minimize the reconstruction error; we also propose and optimize a novel low-amplitude high-frequency diversity that should allow the phase-diverse images to still be used for science. Lastly, we perform a first experimental validation of COFFEE in the very high, space-like contrast conditions of the THD bench and show that COFFEE is able to distinguish between phase and amplitude aberrations.
机译：当前和未来致力于系外行星检测和表征的仪器的最终性能受到科学像面上强度残差的限制，这些强度残差源自未校正的光学像差。为了达到非常高的对比度，需要补偿这些像差。我们提出了一种称为COFFEE的焦平面波字体传感器（用于系外行星探测的冠状焦平面波前估计），其中包括将传统的相位分集扩展到冠冕系统中。在此交流中，我们研究了COFFEE在基于空间的冠状图仪背景下对相位和幅度的联合估计的扩展：优化分集相位，以最大程度地减少重建误差;我们还提出并优化了一种新颖的低振幅高频分集，这种分集图像应仍可用于科学。最后，我们在THD工作台的非常高的，类似空间的对比度条件下进行了COFFEE的首次实验验证，并表明COFFEE能够区分相位和振幅像差。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号