描述：
反光标线亮度，国际上用逆反射系数来表示，单位mcd/lx/m2。其物理意义是：在单位光照条件下，单位面积上产生的亮度值。将仪器置于被测标线的上面，该仪器以数字的形式显示出逆反射系数值，它反映了行车条件下司机对标线反光亮度的客观评价。该仪器由测量主机、电源、充电器、标准板组成。

Third, the description:
The inverse cursor line brightness is expressed internationally by the coefficient of retroreflection, in mcd/lx/m2. Its physical meaning is: the brightness value produced per unit area under unit illumination conditions. The instrument is placed on top of the measured marking line. The instrument displays the value of the retroreflection coefficient in digital form, which reflects the objective evaluation of the driver's reflection brightness on the marking line under driving conditions. The instrument consists of a measuring host, a power supply, a charger, and a standard board.
特点
◆能不分白天、夜间、野外、室内，全天候测量；
◆仪器操作简单，以直观的数字显示出逆反射系数值；
◆仪器配备一套标准板，采用数据传递方式进行标定，准确度高；
◆测量几何条件为观察角1.05°，入射角88.76°，符合国家标准《道路交通标准质量要求和检测方法》；
◆仪器体积小，重量轻，携带方便

Fourth, characteristics
◆It can be measured all day, day, night, field, indoors;
◆The instrument is easy to operate and displays the value of the retroreflection coefficient in an intuitive number;
◆The instrument is equipped with a set of standard boards, which are calibrated by data transmission method with high accuracy;
◆The measurement geometry is the observation angle of 1.05° and the incident angle of 88.76°, which conforms to the national standard “Quality requirements and testing methods for road traffic standards”;
◆The instrument is small in size, light in weight and easy to carry