Compared with the theoretical path, the error of the ray path got by the optimized shortest ray path tracing method is minimum.

相对于理论路径而言，优化最短射线路径法得到的射线路径误差较小。

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Based on diffraction theory a theoretical method for evaluating the three-dimensional focusing performances of the compound X-ray lenses is presented.

给出了基于衍射理论的评价X射线聚焦组合透镜三维聚焦性能的理论方法。

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The refraction index of transparent glass-plate was measured with ray-displacement method, formulas of the refraction index and experimental error were obtained by theoretical analysis.

采用光束位移法测量了透明玻璃板的折射率，分析了折射率的公式和实验误差处理公式。

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