Yoshida Shuhei, Horiuchi Shuma, Ushiyama Zenta, Yamamoto Manabu
Department of Applied Electronics, Tokyo University of Science, Noda, Chiba, Japan.
Opt Express. 2010 Dec 20;18(26):27016-27. doi: 10.1364/OE.18.027016.
We propose a numerical analysis method for evaluating GRIN lenses using the Monte Carlo method. Actual measurements of the modulation transfer function (MTF) of a GRIN lens using this method closely match those made by conventional methods. Experimentally, the MTF is measured using a square wave chart, and is then calculated based on the distribution of output strength on the chart. In contrast, the general method using computers evaluates the MTF based on a spot diagram made by an incident point light source. However the results differ greatly from those from experiments. We therefore developed an evaluation method similar to the experimental system based on the Monte Carlo method and verified that it more closely matches the experimental results than the conventional method.
我们提出了一种使用蒙特卡罗方法评估梯度折射率（GRIN）透镜的数值分析方法。使用该方法对GRIN透镜的调制传递函数（MTF）进行实际测量，所得结果与传统方法的测量结果非常吻合。在实验中，MTF是使用方波图表进行测量的，然后根据图表上输出强度的分布进行计算。相比之下，使用计算机的常规方法是根据入射点光源形成的光斑图来评估MTF的。然而，其结果与实验结果有很大差异。因此，我们基于蒙特卡罗方法开发了一种类似于实验系统的评估方法，并验证了该方法比传统方法更接近实验结果。
