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Optical sparse aperture imaging with faint objects using improved spatial modulation diversity
Xie, Zongliang1,2; Ma, Haotong1,3; Qi, Bo1; Ren, Ge1,2; He, Xiaojun1,2; Dong, Li1,2; Tan, Yufeng1,2; Qiao, Shan1,2
2017
Source PublicationScientific Reports
ISSN2045-2322
Volume7
AbstractThe next generation of optical sparse aperture systems will provide high angular resolution for astronomical observations. Spatial modulation diversity (SMD) is a newly developed post-processing technique for such telescopes, faced with challenges of imaging faint objects, which are very attractive for astronomers but always make raw diversity images suffer serious photon noise. In this paper, we propose an improved SMD with denoising reprocessing embedded to address the problem. The blocking-matching and 3D filtering algorithm, a state-of-the-art denoising technique, is first employed to process the diversity images with low photon intensities generated by spatial modulation, specifically switching off each sub-aperture sequentially. SMD algorithm then can be applied to estimate wavefront and digitally restore images. It is demonstrated by both simulations and experiments that the proposed method outperforms the previous SMD in terms of reconstructions of wavefront and imagery from the raw images of faint objects corrupted seriously by photon noise. The reported method may provide an alternative approach to acquire high-quality images of faint objects for astronomical observations of the future segmented mirrors or telescope arrays.
KeywordPHASE-DIVERSITY TELESCOPE RETRIEVAL
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/8891
Collection光电工程总体研究室(一室)
Affiliation1.Chinese Acad Sci, Key Lab Opt Engn, Chengdu 610209, Sichuan, Peoples R China
2.Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Sichuan, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
4.Natl Univ Def Technol, Coll Optoelect Sci & Engn, Changsha 410073, Hunan, Peoples R China
Recommended Citation
GB/T 7714
Xie, Zongliang,Ma, Haotong,Qi, Bo,et al. Optical sparse aperture imaging with faint objects using improved spatial modulation diversity[J]. Scientific Reports,2017,7.
APA Xie, Zongliang.,Ma, Haotong.,Qi, Bo.,Ren, Ge.,He, Xiaojun.,...&Qiao, Shan.(2017).Optical sparse aperture imaging with faint objects using improved spatial modulation diversity.Scientific Reports,7.
MLA Xie, Zongliang,et al."Optical sparse aperture imaging with faint objects using improved spatial modulation diversity".Scientific Reports 7(2017).
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