一、引言激光投线仪又叫激光标线仪或墨线仪,目前被广泛用于建筑施工中。为了能更好地评定仪器质量,保证测量工作结果的准确性,必须对激光投线仪的技术指标进行检测。二、原理激光投线仪的主要参数:激光线的水平误差、激光线的垂直误差、激光线间的正交误差,激光上对点 I. INTRODUCTION Laser throwing instrument, also called laser marking instrument or inkline instrument, is widely used in construction. In order to better assess the quality of the instrument and ensure the accuracy of the measurement results, the technical specifications of the laser instrument must be checked. Second, the principle The main parameters of the laser line casting instrument: the horizontal error of the laser line, the vertical error of the laser line, the orthogonal error between laser lines, the laser on the point