Then you send laser light through a beam splitter to divide the beam between the two arms, and let the light bounce back and forth a few times before returning to the beam splitter.
然后你通过分光器发射一束激光，让光线在两条边不断反射再回到分光器。
If the two arms have identical lengths, then interference between the light beams returning to the beam splitter will direct all of the light back toward the laser.
如果两条边一样长，分光器发射的激光将被完全反射回分光器。
The effects of optical medium including light beam splitter and reflecting metallic film on laser polarization state in a coherent CO_2 lidar are discussed.
讨论了红外相干激光雷达中光学介质对偏振光束的影响程度，包括光束分束片和反射镜片的影响，给出了定量的结果。
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