NIAOT OpenIR  > 中国科学院南京天文光学技术研究所  > 期刊论文
SPECKLE NOISE SUBTRACTION AND SUPPRESSION WITH ADAPTIVE OPTICS CORONAGRAPHIC IMAGING
Deqing Ren; Jiangpei Dou; Xi Zhang; Yongtian Zhu
2012-07-10
Source PublicationThe Astrophysical Journal
Volume753Issue:2Pages:99-109
Abstract
Future ground-based direct imaging of exoplanets depends critically on high-contrast coronagraph and wave-front manipulation. A coronagraph is designed to remove most of the unaberrated starlight. Because of the wave-front error, which is inherit from the atmospheric turbulence from ground observations, a coronagraph cannot deliver its theoretical performance, and speckle noise will limit the high-contrast imaging performance. Recently, extreme adaptive optics, which can deliver an extremely high Strehl ratio, is being developed for such a challenging mission. In this publication, we show that barely taking a long-exposure image does not providemuch gain for coronagraphic imaging with adaptive optics. We further discuss a speckle subtraction and suppression technique that fully takes advantage of the high contrast provided by the coronagraph, as well as the wave front corrected by the adaptive optics. This technique works well for coronagraphic imaging with conventional adaptive optics with a moderate
Strehl ratio, as well as for extreme adaptive optics with a high Strehl ratio. We show how to substrate and suppress speckle noise efficiently up to the third order, which is critical for future ground-based high-contrast imaging. Numerical simulations are conducted to fully demonstrate this technique.
KeywordMiscellaneous Planetary Systems High Angular Resolution Image Processing
Subject Area自适应光学 ; 系外行星探测
WOS IDWOS:000305912700006
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.niaot.ac.cn/handle/114a32/679
Collection中国科学院南京天文光学技术研究所_期刊论文
天文光谱和高分辨成像技术研究室_期刊论文
Recommended Citation
GB/T 7714
Deqing Ren,Jiangpei Dou,Xi Zhang,et al. SPECKLE NOISE SUBTRACTION AND SUPPRESSION WITH ADAPTIVE OPTICS CORONAGRAPHIC IMAGING[J]. The Astrophysical Journal,2012,753(2):99-109.
APA Deqing Ren,Jiangpei Dou,Xi Zhang,&Yongtian Zhu.(2012).SPECKLE NOISE SUBTRACTION AND SUPPRESSION WITH ADAPTIVE OPTICS CORONAGRAPHIC IMAGING.The Astrophysical Journal,753(2),99-109.
MLA Deqing Ren,et al."SPECKLE NOISE SUBTRACTION AND SUPPRESSION WITH ADAPTIVE OPTICS CORONAGRAPHIC IMAGING".The Astrophysical Journal 753.2(2012):99-109.
Files in This Item: Download All
File Name/Size DocType Version Access License
SPECKLE NOISE SUBTRA(619KB) 开放获取CC BY-NC-NDView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Deqing Ren]'s Articles
[Jiangpei Dou]'s Articles
[Xi Zhang]'s Articles
Baidu academic
Similar articles in Baidu academic
[Deqing Ren]'s Articles
[Jiangpei Dou]'s Articles
[Xi Zhang]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Deqing Ren]'s Articles
[Jiangpei Dou]'s Articles
[Xi Zhang]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: SPECKLE NOISE SUBTRACTION AND SUPPRESSION WITH ADAPTIVE OPTICS CORONAGRAPHIC IMAGING.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.