Image Quality Evaluation for Segmented Mirror Synthetic Aperture Optics

Wei, 张伟 Zhang; Jian, 邓键 Deng; Funian, 龙夫年 Long; Ming, 赵明 Zhao; Baojun, 左宝君 Zuo

doi:10.3788/aos20082804.0687

Cited by 4 publications

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“…Therefore, segmentedmirror testbeds are established to validate wavefront sensing (including piston, tip-tilt, and high order abberations) and control algorithms, for example, the famous wavefront sensing and control testbed (WCT) [5] and active phasing experiment (APE) [6] . There are also some segmented mirror testbeds in China, such as the "experiment system of the segmented-mirror active optics" in Nanjing Astronomical Instruments Research Center [7] which is used to validate real-time control algorithms, the "segmented mirror system with three sub-mirrors primary" in Harbin Institute of Technology [8,9] which helps the study of synthetic aperture optics theory and image quality evaluation, and the "active cophasing and alignment testbed (ACAT)" in Beijing Institute of Technology established in 2008 aiming to validate piston, tip-tilt sensing, and real-time control algorithms.…”

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confidence: 99%

色散瑞利干涉仪在“共相位检测与控制平台”上的实验结果

Wang¹,

Zhu²,

Wang³

et al. 2009

中国光学快报

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We report the laboratory experiment on a segmented mirror testbed that shows the use of a dispersed Rayleigh interferometer to phase segmented mirrors. Segment alignment of tip-tilt is fulfilled by overlapping diffraction pattern centroids of the three individual segments on the focal plane. A spherical interferometer is introduced to evaluate the performance of piston, tip-tilt sensing, and control closed-loop, and finally a total residual root-mean-square (RMS) surface error of about 45 nm is achieved, in which a typical error of about 20 nm is contributed by piston. These results demonstrate that the dispersed Rayleigh interferometer can successfully sense the piston of segmented mirrors and be used in phasing segmented telescopes under extensive studies.

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mentioning

confidence: 99%

色散瑞利干涉仪在“共相位检测与控制平台”上的实验结果

Wang¹,

Zhu²,

Wang³

et al. 2009

中国光学快报

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An active co-phasing imaging testbed with segmented mirrors

Wang

Cao

2011

Sensors and Systems for Space Applications IV

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Active cophasing and aligning testbed with segmented mirrors

Wang¹,

Cao²

2011

Opt. Express

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An active segmented cophasing imaging testbed with a high accurate optical adjustment and control in nanoscale is set up. A two-dimensional dispersed fringe analysis method is used to calculate the piston error between the adjacent segments. Segments alignment of tip-tilt is fulfilled by overlapping diffraction pattern centroids of the individual segment on the focal plane. The cophasing errors are corrected by sensitive micro-displacement actuators under a computer closed-loop control. A FISBA interferometer is introduced to evaluate that a final total residual surface error of about 0.08λ RMS and the residual piston error of 0.026λ RMS are achieved (λ = 633 nm).

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Image Quality Evaluation for Segmented Mirror Synthetic Aperture Optics

Cited by 4 publications

References 0 publications

色散瑞利干涉仪在“共相位检测与控制平台”上的实验结果

色散瑞利干涉仪在“共相位检测与控制平台”上的实验结果

An active co-phasing imaging testbed with segmented mirrors

Active cophasing and aligning testbed with segmented mirrors

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