IEC 62906的本部分规定了标准测量条件和测量方法 根据投影屏幕的光学性能确定投影屏幕光学性能的方法 不同视角下的光度特性，包括屏幕增益和斑点对比度 方向。这些方法仅适用于投影屏幕和 激光投影仪是集成的，并与固定配置一起使用，以创建一个真实的图像 形象包括带有平面的前后投影屏幕。这份文件 不包括分类为光学透明屏幕的投影屏幕，包括 抬头显示。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This part of IEC 62906 specifies the standard measurement conditions and measuring methods for determining the optical performance of a projection screen in terms of its photometric characteristics, including screen gain and speckle contrast, from different viewing directions. These methods are only applied for the case in which the projection screen and a laser projector are integrated and used with a fixed configuration as a set to create a real image. Both front and rear projection screens, with a flat surface, are included. This document excludes projection screens which are classified as optically see-through screens, including head-up displays.All current amendments available at time of purchase are included with the purchase of this document.