A straightforward derivation of the integral governing the trajectory of light around a massive object is presented. By a proper choice of coordinate transformation the singularity in the integrand of this equation is removed, which makes it more suitable for numerical calculations of trajectories. An improved approximate formula for the deflection angle is presented.

中文翻译：

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大型物体的光偏转的改进公式

提出了控制大物体周围光轨迹的积分的直接推导。通过坐标变换的适当选择，在这个等式中的被积函数的奇点被去除，这使得它更适合于轨迹的数值计算。提出了一种改进的偏转角近似公式。