光脉冲和光干涉测距技术在测量工作中久已被应用，但过去由于其本身具有重要的局限性，而未能受到应有的重视。近十余年来，此两项技术有较大发展，并且已经在多种工程测量和工业测量工作中显示了若干特具的优势，故本文专予阐述。 Optical pulse and optical interferometry technology has long been used in surveying, but in the past due to its inherent limitations, it failed to receive the attention it deserved. In the recent ten years, these two technologies have been greatly developed, and have shown a number of unique advantages in various engineering surveying and industrial surveying work.