The crystal axes and the principal stress axes are obtained from the optical indicatrix axes manually by turning the projection diagram as usual.
以往是通过手工转图由光率体主轴获取晶轴和应力主轴的，把手工操作变为计算机运算和成图，是一个重要的附加课题。
:In the experiment of deciding monocrystal crystal axis direction in M.
在用劳厄法确定单晶体的晶轴方向的实验中,入射线和样品往往不会理想垂直。