本文件规定了测量功率（能量）密度分布的方法，并规定了表征给定平面上激光功率（能量）密度分布函数空间特性的参数。本文件中给出的方法旨在用于测试和表征光学和光学仪器中使用的连续波（cw）和脉冲激光束。本文件提供了用于参考功率密度分布的术语和符号的定义，以及其测量要求。对于脉冲激光器，时间积分功率密度（即能量密度）的分布是最常测量的量。

This document specifies methods by which the measurement of power (energy) density distribution is made and defines parameters for the characterization of the spatial properties of laser power (energy)density distribution functions at a given plane. The methods given in this document are intended to be used for the testing and characterization of both continuous wave (cw) and pulsed laser beams used in optics and optical instruments. This document provides definitions of terms and symbols to be used in referring to power density distribution, as well as requirements for its measurement. For pulsed lasers, the distribution of time-integrated power density (i.e. energy density) is the quantity most often measured.