标定超高压电子显微镜中菊池线的一种有效方法

用电子计算机标定菊池线的困难在于实验误差。误差的来源有二:一是菊池线位置测量的误差;二是仪器常数的误差。本文用最小二乘法拟合菊池线及自动校正仪器常数的办法减少了实验误差,并用点阵平面几何学的方法进行标定,大大地提高了标定的可靠性。本方法具有普遍的适用性,但更适合于超高压电镜中菊池线的标定。 关键词：

AN EFFECTIVE METHOD FOR INDEXING KIKUCHI LINES FROM UHVEM

The difficulty of automatic indexing of Kikuchi lines by computer lies in exper-mental errors in the mesurements of Kikuchi line positions and the camera constant. These errors were minimized by adopting a least square method to fit Kikuchi lines and correcting camera constant automatically. In addition, the geometry of lattice planes was used to aid the indexing of Kikuchi lines. Consquently, the reliability of correct indexing has been greatly improved. This method is universally applicable, however, it is, in particular, suitable to the case of Kikuchi lines from UHVEM.