1.1 本规程规定了用于表征辐射源颜色和亮度的精确光谱辐射测量数据所需的仪器测量要求、校准程序和物理标准。 1.2 本规程列出了在特定方法、规程或规范中需要进行光谱辐射测量时必须指定的参数。 1.3 本规程描述了确定光源基本色度数据所需的独特计算程序。 1.4 这种做法在范围上是通用的，而不是具体的仪器、物体或材料。 1.5 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.6 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 5.1 获得CIE三刺激值或用于描述辐射源颜色的其他颜色坐标的基本方法是使用光谱辐射测量。 这些测量值与代表CIE 1931标准观测器（CIE出版物015:2004）的数值相加使用，并归一化为 K m ，最大光谱发光效率函数，其值为683 lm/W。 5.2 本规程提供了一个程序，用于选择用于提供所需精度光谱辐射数据的光谱辐射计的操作参数，用于其校准，以及校准所需的物理标准。 5.3 提出并讨论了表征具有窄或不连续光谱的光源的特殊要求。 实践程序的修改 E308年 用于纠正窄源或不连续源的异常性质。

1.1 This practice prescribes the instrumental measurement requirements, calibration procedures, and physical standards needed for precise spectroradiometric data for characterizing the color and luminance of radiant sources. 1.2 This practice lists the parameters that must be specified when spectroradiometric measurements are required in specific methods, practices, or specifications. 1.3 This practice describes the unique calculation procedures required to determine basic colorimetric data of luminous sources. 1.4 This practice is general in scope rather than specific as to instrument, object, or material. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 5.1 The fundamental method for obtaining CIE tristimulus values or other color coordinates for describing the colors of radiant sources is by the use of spectroradiometric measurements. These measurements are used by summation together with numerical values representing the CIE 1931 Standard Observer (CIE Publication 015:2004) and normalized to K m , the maximum spectral luminous efficacy function, with a value of 683 lm/W. 5.2 This practice provides a procedure for selecting the operating parameters of spectroradiometers used for providing the desired precision spectroradiometric data, for their calibration, and for the physical standards required for calibration. 5.3 Special requirements for characterizing sources of light possessing narrow or discontinuous spectra are presented and discussed. Modifications to the procedures of Practice E308 are given to correct for the unusual nature of narrow or discontinuous sources.