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PHASE QUANTIZATION STUDY OF SPATIAL LIGHT MODULATOR FOR EXTREME HIGH-CONTRAST IMAGING
Jiangpei Dou1,2,3; Deqing Ren1,2,3
2016-11
Source PublicationThe Astrophysical Journal
Volume832Issue:84Pages:1-11
Abstract
Direct imaging of exoplanets by reflected starlight is extremely challenging due to the large luminosity ratio to the primary star. Wave-front control is a critical technique to attenuate the speckle noise in order to achieve an extremely high contrast.

We present a phase quantization study of a spatial light modulator (SLM) for wave-front
control to meet the contrast requirement of detection of a terrestrial planet in the habitable zone of a solar-type star.
 
We perform the numerical simulation by employing the SLM with different phase accuracy and actuator numbers,which are related to the achievable contrast. We use an optimization algorithm to solve the quantization problems that is matched to the controllable phase step of the SLM.

Two optical configurations are discussed with the SLM located before and after the coronagraph focal plane mask. The simulation result has constrained the specification
for SLM phase accuracy in the above two optical configurations, which gives us a phase accuracy of 0.4/1000 and 1/1000 waves to achieve a contrast of 10-10.

Finally, we have demonstrated that an SLM with more actuators can deliver a competitive contrast performance on the order of 10-10  in comparison to that by using a deformable mirror.
KeywordNumerical Planetary Systems High Angular Resolution
Subject Area天文技术与方法
Language英语
Document Type期刊论文
Identifierhttp://ir.niaot.ac.cn/handle/114a32/1349
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
Affiliation1.美国加州州立大学物理天文系
2.南京天文光学技术研究所
3.中国科学院天文光学重点实验室
Recommended Citation
GB/T 7714
Jiangpei Dou,Deqing Ren. PHASE QUANTIZATION STUDY OF SPATIAL LIGHT MODULATOR FOR EXTREME HIGH-CONTRAST IMAGING[J]. The Astrophysical Journal,2016,832(84):1-11.
APA Jiangpei Dou,&Deqing Ren.(2016).PHASE QUANTIZATION STUDY OF SPATIAL LIGHT MODULATOR FOR EXTREME HIGH-CONTRAST IMAGING.The Astrophysical Journal,832(84),1-11.
MLA Jiangpei Dou,et al."PHASE QUANTIZATION STUDY OF SPATIAL LIGHT MODULATOR FOR EXTREME HIGH-CONTRAST IMAGING".The Astrophysical Journal 832.84(2016):1-11.
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