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A Digital Holographic Approach for Co-Phasing of Segmented Telescopes: Proof of Concept Using Numerical Simulations
CHANGWEI LI; SIJIONG ZHANG
2014-03
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
Volume126Issue:937Pages:280-286
Abstract
Online co-phasing of segmented telescopes by dual-wavelength digital holography is proposed.Two digital holograms (one hologram per wavelength) are employed to get the phase of the segmented telescope for a longer synthetic wavelength by the digital holographic approach. The holograms are recorded by a high-speed CCD camera using the point-diffraction Mach-Zehnder interferometer. By fitting the plane for the synthetic wavelength phase in each segment of the telescope, the coefficients of piston and tip/tilt for each segment can be acquired. To test the feasibility of the proposed method, two simulated telescopes with 37 hexagonal segments are taken as examples to examine co-phasing segmented telescopes by digital holography when atmospheric turbulence and detection noises exist. Numerical simulations show that the dual-wavelength digital holographic approach for co-phasing of segmented telescopes is feasible and highly accurate and robust.
Subject Area自适应光学
Document Type期刊论文
Identifierhttp://ir.niaot.ac.cn/handle/114a32/789
Collection中国科学院南京天文光学技术研究所_期刊论文
中科院天文光学技术重点实验室_期刊论文
Recommended Citation
GB/T 7714
CHANGWEI LI,SIJIONG ZHANG. A Digital Holographic Approach for Co-Phasing of Segmented Telescopes: Proof of Concept Using Numerical Simulations[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,2014,126(937):280-286.
APA CHANGWEI LI,&SIJIONG ZHANG.(2014).A Digital Holographic Approach for Co-Phasing of Segmented Telescopes: Proof of Concept Using Numerical Simulations.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,126(937),280-286.
MLA CHANGWEI LI,et al."A Digital Holographic Approach for Co-Phasing of Segmented Telescopes: Proof of Concept Using Numerical Simulations".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 126.937(2014):280-286.
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