本文件规定了使用带积分球的双光束分光光度计，在350 nm至850 nm的指定波长范围内，测定涂层和未涂层光学表面光谱前向散射特性的程序。本文件也适用于单波长的前向散射特性。 本文件适用于收集角大于2.7度的光谱前向散射测量。ISO 13696提供了较小收集角的测量方法。

This document specifies procedures for determining the spectroscopic forward scattering characteristics of coated and uncoated optical surfaces over a specified wavelength range between 350 nm and 850 nm using a double-beam spectrophotometer with an integrating sphere. This document is also applicable to the forward scattering properties at a single wavelength. This document is applicable to spectroscopic forward scattering measurements with collection angles larger than 2,7 degrees. ISO 13696 provides a measurement method for smaller collection angles.