Iterative wave-front reconstruction for open-loop metrology applications: Shack–Hartmann and shearing interferometer wave-front sensing using Fourier or Multigrid reconstructors
Iterative wave-front reconstruction for open-loop metrology applications: Shack–Hartmann and shearing interferometer wave-front sensing using Fourier or Multigrid reconstructors
复制标题
DOI：
10.1016/j.optcom.2009.09.036
复制
发表时间：
2010-01
影响因子：
2.4
通讯作者：
K. Baker;M. Moallem
中科院分区：
文献类型：
--
作者：
K. Baker;M. Moallem
存在许多技术来重建Shack-Hartmann和剪切干涉仪波前传感器中的波前。其中两种技术涉及通过傅里叶变换或多重网格方法解决最小二乘波前重建。这两种技术在正方形网格上操作，并且对非线性和用于将梯度延伸到孔径之外的正方形网格的边缘的方法敏感。这两种灵敏度在重建大像差时会导致较大的残余波前误差。在这篇文章中，我们介绍了一个迭代计算循环的重建过程中，旨在改善这些参数引入的重建方差。这种技术允许大相位的精确重建，这可能出现在诸如大气湍流的开环补偿、像差仪和计量学等应用中。在这篇文章中，它表明，大的像差可以准确地重建利用这种迭代方法与傅立叶或多重网格重建。
Numerous techniques exist to reconstruct the wave-front in Shack–Hartmann and shearing interferometer wave-front sensors. Two of these techniques involve solving the least-squares wave-front reconstruction via Fourier transform or Multigrid methods. These two techniques operate on a square grid and are sensitive to both nonlinearities and to the methods used to extend the gradients beyond the aperture to the edges of the square grid. Both of these sensitivities can lead to large residual wave-front errors when reconstructing large aberrations. In this article we introduce an iterative computational loop in the reconstruction process which is designed to improve the reconstruction variances introduced by these parameters. This technique allows for accurate reconstruction of large phases which can arise in applications such as open-loop compensation of atmospheric turbulence, aberrometers and metrology. In this article, it is demonstrated that large aberrations can be accurately reconstructed utilizing this iterative method with Fourier or Multigrid reconstructors.