The effect of gnomonic distortion on orientation indexing of electron backscatter diffraction patterns is explored through simulation of electron diffraction patterns for sample-to-detector geometries associated with transmission Kikuchi diffraction (TKD) and electron backscatter diffraction (EBSD). Simulated data were analysed by computing a similarity index for both Hough transformed data and simulated patterns to determine the sensitivity of each method for detecting subtle differences in the effect of gnomonic distortions on electron diffraction patterns. These results indicate that the increased gnomonic distortions in electron diffraction patterns for a TKD geometry enhance the sensitivity for detecting subtle differences in interband angles. Additionally, the utilisation of a Hough transform-based indexing approach further enhances the sensitivity.

中文翻译：

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晷偏畸变对电子背散射衍射和透射菊池衍射的影响

通过模拟与透射菊池衍射 (TKD) 和电子背散射衍射 (EBSD) 相关的样品到探测器几何形状的电子衍射图案，探索了扦子失真对电子背散射衍射图案的取向索引的影响。通过计算 Hough 变换数据和模拟图案的相似性指数来分析模拟数据，以确定每种方法在检测电子衍射图案的晷畸变影响的细微差异方面的灵敏度。这些结果表明，TKD 几何结构的电子衍射图案中增加的晷偏畸变提高了检测带间角度细微差异的灵敏度。此外，