One-dimensional spectra of turbulence-induced Zernike aberrations: time-delay and isoplanicity error in partial adaptive compensation
One-dimensional spectra of turbulence-induced Zernike aberrations: time-delay and isoplanicity error in partial adaptive compensation
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湍流引起的泽尼克像差的一维谱：部分自适应补偿中的时滞和等面性误差
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
D. Roddier
中科院分区：
文献类型：
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作者：
F. Roddier;M. Northcott;J. Graves;D. McKenna;D. Roddier
本文给出了恒星源在无穷远处时，相干性引起的Zernike像差项的一维谱表达式的一个简单推导。数值结果提出了几个条款。给出了部分补偿自适应光学系统中最大容许延迟和最大等晕角的表达式。在加拿大-法国-夏威夷望远镜上记录的泽尼克项的时间-频率谱，当用相同的湍流分布卷积所有相应的理论谱时，可以很好地再现。只有少数大气层被发现有助于图像退化。
A simple derivation is given for the expression of one-dimensional spectra of turbulence-induced Zernike aberration terms in the case of a stellar source at infinity. Numerical results are presented for several terms. Expressions are given for the maximum acceptable delay and the maximum isoplanatic angle in a partially compensating adaptive optics system. Temporal-frequency spectra of the Zernike terms, recorded at the Canada–France–Hawaii telescope, are well reproduced when one convolves all the corresponding theoretical spectra with the same turbulence distribution. Only a few atmospheric layers are found to contribute to image degradation.