交叉柱镜像差计：一种计算像差的替代方法。
The crossed-cylinder aberroscope: an alternative method of calculation of the aberrations.
作者信息
Smith G, Applegate R A, Howland H C
机构信息
Department of Optometry and Vision Sciences, University of Melbourne, Parkville, Victoria, Australia.
出版信息
Ophthalmic Physiol Opt. 1996 May;16(3):222-9.
The distorted retinal grid image in the cross-cylinder aberroscope is conventionally analysed using a method based upon orthogonal polynomials. This method restricts the amount of data that can be extracted from the grid image and requires the real grid that is placed between the cross-cylinders to be pre-distorted, with the amount of pre-distortion depending upon the vertex distance. We present an alternative method based upon the minimization of least squares that does not have these restrictions and show that it gives essentially the same results as the original orthogonal polynomial method. Furthermore, the minimization of least squares method also provides a measure of 'goodness' of fit (e.g. the minimum of the sum of the squares of the deviations.
传统上，使用基于正交多项式的方法来分析交叉圆柱像差仪中扭曲的视网膜网格图像。这种方法限制了可从网格图像中提取的数据量，并且要求放置在交叉圆柱之间的真实网格进行预扭曲，预扭曲量取决于顶点距离。我们提出了一种基于最小二乘法的替代方法，该方法没有这些限制，并表明它给出的结果与原始正交多项式方法基本相同。此外，最小二乘法还提供了拟合“优度”的度量（例如，偏差平方和的最小值）。
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