前言光电测距仪,目前已在铁路测量中,得到日益广泛的应用,并收到了显著的效果,不但提高了工作效率和测量精度,而且还大大地减轻了劳动强度,使铁路测量工作起了革命性的变化,走上了现代化的征途。为了普及光电测距知识,从本期起分期连载光电测距讲座,其内容是:结合铁路测量的需要和当前的具体情况,以短程红外光电测距仪 Foreword Optical range finder, has been in the railway survey, has been more widely used, and received significant results, not only to improve work efficiency and measurement accuracy, but also greatly reduce the labor intensity, the railway measurement work played a Revolutionary change, embarked on a journey of modernization. In order to popularize the knowledge of photoelectric distance measurement, from this issue, a series of seminars on photoelectric distance measurement are carried out. The contents are as follows: According to the needs of railway surveying and the current situation, the short distance infrared optical distance measuring instrument