前照灯检验仪检测时要求保证汽车纵向轴线与其导轨垂直,并使前照灯与之保持标准距离(依前照灯检验仪型号定)。国家标准规定的前照灯光轴偏移量限值要求,是在距离汽车前照灯10m远的屏幕上测量的结果。通过理论计算可知,车辆纵向轴线与前照灯检测仪导轨不垂直时,如果偏移1°,会使光轴偏移量变化175 mm/10m,而偏移2°,会使光轴偏移量变化 Headlamp testing instrument testing required to ensure that the longitudinal axis of the car perpendicular to its rail, and to maintain the standard headlamps with the distance (according to the previous light test instrument model). National standards for headlamp axis offset limit requirements, the car headlamps 10m away from the screen to measure the results. The theoretical calculation shows that when the longitudinal axis of the vehicle is not perpendicular to the headlamp detector rail, if the offset is 1 °, the optical axis offset will change by 175 mm / 10m, and the offset by 2 ° will shift the optical axis The amount of change