本标准适用于道路车辆，尤其是前挡风玻璃中使用的平面或曲面安全玻璃。本标准规定了安全玻璃材料光学（角度）偏差和折射率的测定方法；这些参数用于测量嵌装玻璃的光学变形。此外，本文介绍的方法提供了大面积安全玻璃光学特性的快速概述。

This standard applies to flat or curved safety glazing used in road vehicles, especially for windscreens. This standard specifies methods of determining the optical (angular) deviation and refractive power of safety glazing materials; these parameters serve as a measure of the optical distortion of the glazing. In addition, the methods described here provide a quick overview of the optical properties of large areas of safety glazing.