IEC 61280-1-4:20 23作为IEC 61280-1-4:20 23 RLV提供，其中包含国际标准及其红线版本，显示了与上一版本相比技术内容的所有变化。IEC 61280-1-4:2023建立了用于多模光纤的光源的环形通量测量方法的表征过程。本文件阐述了用于收集二维光纤近场灰度数据并随后将其简化为一维数据的程序，所述一维数据表示为来自光纤的光学中心的半径的一组三个采样参数函数。纤维芯直径的估计不是本文件的目的。这第三版取消并取代了2009年出版的第二版。本版构成技术修订版。与上一版相比，此版本包括以下重大技术变更: -改进校准程序和校准可追溯性； -改进纤维振荡器的描述和要求； -添加脉冲光源； -使用微定位器去除可追溯性差的校准过程。

IEC 61280-1-4:2023 is available as IEC 61280-1-4:2023 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 61280-1-4:2023 establishes the characterization process of the encircled flux measurement method of light sources intended to be used with multimode fibre. This document sets forth a procedure for the collection of two-dimensional fibre optic nearfield greyscale data and subsequent reduction to one-dimensional data expressed as a set of three sampled parametric functions of radius from the fibre’s optical centre. Estimation of the fibre core diameter is not an objective of this document. This third edition cancels and replaces the second edition published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- improvement of calibration procedure and calibration traceability;
- improvement of fibre shaker description and requirements;
- addition of pulsed light sources;
- removal of a poorly traceable calibration process using a micro positioner.