On the sequence of deformable mirrors in MCAO: findings from an on-sky, closed-loop experiment
On the sequence of deformable mirrors in MCAO: findings from an on-sky, closed-loop experiment
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关于 MCAO 中可变形镜子的序列:天空闭环实验的发现
DOI:
10.1117/12.2563376
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Goode, Phil
中科院分区:
文献类型:
--
作者:
Schmidt, Dirk;Gorceix, Nicolas;Goode, Phil
We performed an on-sky MCAO experiment using 4 deformable mirrors (DMs) to analyze the relevance of their sequence to the residual wavefront error. Two DMs were conjugate to 4 and 8 km. The other two DMs were placed in pupil images upstream and downstream of the 4-km and 8-km mirrors. At any time, both high altitude DMs were active but only one pupil DM was active while the other one stayed flat. Firstly, we found that the MCAO control loops using either pupil DM were stable and robust. Dynamic misregistration, which was present for the first pupil DM, was not an immediate problem for the controller. We did not notice an apparent difference when repeatedly switching between the pupil DMs during the operation. A closer analysis of the contrast in the corrected images and AO telemetry indicates an advantage when the pupil correction was applied with the DM that was downstream of the high-altitude DMs. This finding is consistent in several data recorded at different days. The difference, however, is small. A more detailed analysis is probably needed to rule out error sources potentially not considered herein to draw a final conclusion on the optimal sequence of DMs in MCAO and its practical relevance.
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DOI:
10.1086/153639
发表时间:
1975-06
期刊:
The Astrophysical Journal
影响因子:
--
作者:
R. Dicke
通讯作者:
R. Dicke
DOI:
--
发表时间:
2005
期刊:
SPIE Optics + Photonics
影响因子:
--
作者:
T. Berkefeld;D. Soltau;Oskar von der Luehe
通讯作者:
Oskar von der Luehe
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
O. Farley;J. Osborn;T. Morris;A. Reeves;R. Wilson
通讯作者:
R. Wilson
影响因子:
3.6
作者:
R. Flicker
通讯作者:
R. Flicker
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
O. Lühe
通讯作者:
O. Lühe