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This Technical Report provides basic measurement principles and practical guidance on spectroradiometry of optical radiation sources in the ultraviolet, visible and near‑infrared regions of the electromagnetic spectrum in the wavelength range from 200 nm to 2 500 nm.

The document primarily deals with spectral measurements of irradiance, radiance, radiant intensity, radiant flux and derivative quantities. The document provides a detailed overview of relevant terminology and basic measurement principles, including those for instrument calibration. It provides practical guidance for identifying, understanding and quantifying relevant measurement uncertainty components.

This document replaces CIE 063-1984. Additional details on measurement principles not covered in this document can be found in CIE 214:2014.

The document is written in English, with a short summary in French and German. It consists of 94 pages with 41 figures and 3 tables and is readily available from the CIE Webshop or from the National Committees of the CIE.