optical path length

例句：

1. 1.The camera's optical path length is measured in meters.
   相机的光路长度以米为单位测量。
2. 2.The scientist used a telescope to measure the optical path length of the sun.
   科学家使用望远镜测量了太阳的光路长度。
3. 3.The optical path length affects the way light interacts with matter.
   光路长度影响光与物质的相互作用方式。