| An active coronagraph using a liquid crystal array for exoplanet imaging: principle and testing | |
Xi Zhang ; De-Qing Ren; Yong-Tian Zhu; Jiang-Pei Dou
| |
| 2012-05 | |
| 发表期刊 | Research in Astronomy and Astrophysics
 |
| 卷号 | 12期号:5页码:591–600 |
| 摘要 | High-contrast imaging coronagraphs, used for the detection of exoplanets, have always adopted passive coronagraph optical components. It is therefore impossible to actively optimize the coronagraphs to achieve their best performance. To solve this problem, we propose a novel high-contrast imaging coronagraph which combines a liquid crystal array (LCA) for active pupil apodization and a deformable mirror (DM) for phase correction. The LCA we use is an amplitude-only spatial light modulator. The LCA is well calibrated and compensates for its amplitude non-uniformity and nonlinear intensity responsivity.We measured the imaging contrasts of the coronagraph system with the LCA only and without the DMdeployed. Imaging contrasts of 10-4and 10-5can be reached at an inner working angular distance of 2.5 and 5/D, respectively. A simulation shows that the phase errors on the coronagraph pupil limit the contrast performance. The contrast could be further improved if a DM is deployed to correct the phase errors induced by the LCA and coronagraph optics. |
| 关键词 | Coronagraph Liquid Crystal Array High-contrast Imaging Exoplanet Detection |
| 学科领域 | 系外行星探测 |
| WOS记录号 | WOS:000304387000011 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.niaot.ac.cn/handle/114a32/636 |
| 专题 | 期刊论文 |
| 推荐引用方式 GB/T 7714 | Xi Zhang,De-Qing Ren,Yong-Tian Zhu,et al. An active coronagraph using a liquid crystal array for exoplanet imaging: principle and testing[J]. Research in Astronomy and Astrophysics,2012,12(5):591–600. |
| APA | Xi Zhang,De-Qing Ren,Yong-Tian Zhu,&Jiang-Pei Dou.(2012).An active coronagraph using a liquid crystal array for exoplanet imaging: principle and testing.Research in Astronomy and Astrophysics,12(5),591–600. |
| MLA | Xi Zhang,et al."An active coronagraph using a liquid crystal array for exoplanet imaging: principle and testing".Research in Astronomy and Astrophysics 12.5(2012):591–600. |
| 条目包含的文件 | 下载所有文件 | |||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| An active coronagrap（830KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 | |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
修改评论