Cumulative wavefront reconstructor for the Shack-Hartmann sensor

Cumulative wavefront reconstructor for the Shack-Hartmann sensor
复制标题

Shack-Hartmann 传感器的累积波前重建器

DOI：
--
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
R. Ramlau
R. Ramlau
中科院分区：
--
文献类型：
--
作者：
M. Zhariy;A. Neubauer;M. Rosensteiner;R. Ramlau

文献摘要

被引文献

相似文献

我们提出了一种新的直接算法，旨在重建光学 单共轭中 Shack-Hartmann 传感器测量的波前 自适应光学 (SCAO) 系统。自适应光学系统的目标 为大型望远镜设计的目标只有在波前 重建足够快。我们的方案不包含任何明确的 重建过程的正则化，但仍然能够提供 重建质量良好。质量分析分为三类 变化的参数：望远镜的直径、子孔径的数量 和光子噪声的水平。分析和证明都已表明 重建的质量，通过 Strehl 测量 比率，对于小光子噪声水平是合理的，并且随着 相同望远镜尺寸的子孔径数量不断增加。的影响 随着望远镜的增加，重建中的光子噪声变得更高 直径。该方法的计算复杂度与数量呈线性关系 未知。计算所有求和和乘法步骤，比例因子为 14 美元。此外，由于其结构简单，累积重构器为 可流水线化和可并行化，这使得有效计算更加均匀 快点。
We present a new direct algorithm aiming at the reconstruction of the optical wavefront from the Shack-Hartmann sensor measurements in Single Conjugate Adaptive Optics (SCAO) systems. The objective of an adaptive optics system designed for a large telescope can be only achieved if the wavefront reconstruction is sufficiently fast. Our scheme does not contain any explicit regularization for the reconstruction process but is still able to provide a good quality of reconstruction. The analysis of quality is given for three varying parameters: the diameter of the telescope, the number of subapertures and the level of photon noise. It has been shown both analytically and numerically that the quality of the reconstruciton, measured by the Strehl ratio, is reasonable for the small photon noise level and increases with the increasing number of subapertures for the same telescope size. The impact of the photon noise on the reconstruction gets higher with the increasing telescope diameter. The computational complexity of the method is linear in the number of unkowns. Counting all summation and multiplication steps the scaling factor is $14$. Moreover, due to its simple structure, the cumulative reconstructor is pipelinable and parallelizable, which makes the effective computation even faster.