采用可见光或红外光作为载波，通过测定光线在测线两端点间往返的传播时间(t)，算出距离（D）。它具有测量速度快、方便，受地形影响小，测量精度高等优点，已逐渐代替常规量距，光电测距仪的应用，大大提高了作业的速度和效率，使测边的精度大为提高。
光电测距仪 [测] geodimeter ; [测] electro-optical distance measuring instrument ; electro-optical distance meter ; electroptic range finder
光电测距计 geodimeter
短程光电测距仪 Short range electro-optic distance-measuring instrument
陀螺定向光电测距导线 gyrophic EDM traverse ; [测] gyro EDM traverse
光电测距导线 [测] edm traverse
光电测距三角高程测量 the EDM trigonometric leveling
光电被动测距 optical passive ranging
光学测距仪电池组 phototach battery pack
电光回波测距系统 electro optical echo ranging system
本文研究了利用光电测距仪进行道路勘测设计的新方法。
A new method of route survey and design by electro-optical range finder was studied.
本文根据大气温度层结状态，讨论两种光电测距最佳观测时刻的理论。
Based on the large structure state of atmospheric temperature, the theoretical basis of the best observation time obtained through the two times electric ranging has been discussed.
在光电测距三角高程测量中，大气折光对观测量的影响是一个非常棘手的问题。
The effect of atmospheric refraction error on observed value is a very thorny problem in EDM trigonometric leveling.
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