论文标题

高对比度成像仪的冗余无偶然的学生(RAP)可靠地分割畸变和岛屿效应

Redundant Apodized Pupils (RAP) for high-contrast imagers robust to segmentation-due aberrations and island effects

论文作者

Leboulleux, Lucie, Carlotti, Alexis, N'Diaye, Mamadou, Cantalloube, Faustine, Milli, Julien, Bertrou-Cantou, Arielle, Mouillet, David, Pourré, Nicolas, Vérinaud, Christophe

论文摘要

较大的系外行星的成像和表征,到年轻的木星和外射线,将需要在小角度分离下访问非常高的对比度,并且对像差的鲁棒性增加,这三个限制了当前仪器的发展。这个目标依赖于在极大的直径望远镜上设置的有效冠状,例如30米望远镜(TMT),巨型麦哲伦望远镜(GMT)或极大的望远镜(ELT)。但是,它们往往会受到特定的畸变,这些畸变极大地恶化了冠状的性能:它们的主要镜像分割意味着阶段错误,甚至缺少细分市场,并且望远镜的大小会引起大蜘蛛,从而在非常大的望远镜(VLT)/Sphere仪器(VLT)/Spare teries-subaru terescope上产生了低范围的效果,或者已经观察到了subaru tereScope,或者构图,或者构造的效果。 ELT情况下的模拟。然后,冠冕的持续发展必须考虑到他们对此类错误的敏感性。我们提出了一种创新的方法,以生成可冠冕的冠状动脉,以对主要的镜像相分化错误以及低风和自适应式彩绘彩绘效果。该方法基于段或花瓣的暂停,而不是整个学生,然后重复该插序以模仿瞳孔冗余。我们在詹姆斯·韦伯(James Webb)空间望远镜的学生上验证了这种所谓的冗余瞳孔(RAP)方法,该方法由18个六角形细分市场组成,以对齐,并在VLT体系结构上,如果有残留的低风波效应。

The imaging and characterization of a larger range of exoplanets, down to young Jupiters and exo-Earths will require accessing very high contrasts at small angular separations with an increased robustness to aberrations, three constraints that drive current instrumentation development. This goal relies on efficient coronagraphs set up on extremely large diameter telescopes such as the Thirty Meter Telescope (TMT), the Giant Magellan Telescope (GMT), or the Extremely Large Telescope (ELT). However, they tend to be subject to specific aberrations that drastically deteriorate the coronagraph performance: their primary mirror segmentation implies phasing errors or even missing segments, and the size of the telescope imposes large spiders, generating low-wind effect as already observed on the Very Large Telescope (VLT)/SPHERE instrument or at the Subaru telescope, or adaptive-optics-due petaling, studied in simulations in the ELT case. The ongoing development of coronagraphs has then to take into account their sensitivity to such errors. We propose an innovative method to generate coronagraphs robust to primary mirror phasing errors and low-wind and adaptive-optics-due petaling effect. This method is based on the apodization of the segment or petal instead of the entire pupil, this apodization being then repeated to mimic the pupil redundancy. We validate this so-called Redundant Apodized Pupil (RAP) method on a James Webb Space Telescope-like pupil composed of 18 hexagonal segments segments to align, and on the VLT architecture in the case of residual low-wind effect.

扫码加入交流群

加入微信交流群

微信交流群二维码

扫码加入学术交流群,获取更多资源