Changchun Institute of Optics,Fine Mechanics and Physics,CAS
Method of reducing photon noise and turbulence for laser guide-star detection on large-aperture telescopes | |
Liu, C.; Xu, H. Y.; Hu, L. F.; Cao, Z. L. | |
2018 | |
发表期刊 | Optics Communications |
ISSN | 0030-4018 |
卷号 | 426页码:23-29 |
摘要 | Adaptive optics systems (AOSs) rely on good estimation of a distorted wavefront. Two problems make centroid detection difficult, namely, the problem of a relatively large subaperture that brings high-order aberrations and that of a large laser guide-star spot that brings in a large photon noise. To solve these problems, we proposed an estimation method based on Poisson statistics to reduce the photon noise, and the high-order aberrations are partly separated from a spot image to well estimate the slope in the subaperture. Simulation results indicate that our method performs better than the weighted center-of-gravity (WCOG) method and correlation method (CM). Under the condition of SNR =20 and r(o) = 13cm The root-mean-square values of the residual wavefront using the proposed method are approximately 10%, 50%, and 35% lower than those of the COG, WCOG, and CM, respectively. The proposed method would be highly beneficial for ground-based astronomical AO systems intended to provide moderate to high Strehl ratios at near infrared wavelengths on larger than 10m-aperture telescopes. |
关键词 | Optics |
DOI | 10.1016/j.optcom.2018.05.015 |
收录类别 | SCI ; EI |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ciomp.ac.cn/handle/181722/61055 |
专题 | 中国科学院长春光学精密机械与物理研究所 |
推荐引用方式 GB/T 7714 | Liu, C.,Xu, H. Y.,Hu, L. F.,et al. Method of reducing photon noise and turbulence for laser guide-star detection on large-aperture telescopes[J]. Optics Communications,2018,426:23-29. |
APA | Liu, C.,Xu, H. Y.,Hu, L. F.,&Cao, Z. L..(2018).Method of reducing photon noise and turbulence for laser guide-star detection on large-aperture telescopes.Optics Communications,426,23-29. |
MLA | Liu, C.,et al."Method of reducing photon noise and turbulence for laser guide-star detection on large-aperture telescopes".Optics Communications 426(2018):23-29. |
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 | ||
Method of reducing p(1019KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 |
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