pencil of light是什么意思

用法例句

The behavior of optical trace is calculated by using ray tracing method when a cone ray deflects into and propagates in a prism.

采用光学追踪法计算了圆锥光线入射到棱镜中的轨迹 ,并对计算结果进行了实验验证 ,实验结果与计算结果相一致 ,从而获取了拾音器的光学结构参