本标准规定了评估日光模拟器提供的辐照度光谱质量的方法，用于颜色的视觉评估或颜色测量，以及为模拟器指定质量等级的方法。它规定了模拟器色度与CIE标准日光光源或正在模拟的CIE日光光源色度之间的最大允许偏差，以便通过该方法对模拟器进行分级。评估的基础是光源变化的特殊同色异谱指数，使用由反射和荧光特性指定的虚拟（而非真实）样本对。当使用CIE 1964标准比色观察仪进行评估时，这对样本在CIE日光光源下是同色异谱匹配的。本标准中描述的方法量化了被测模拟器照亮虚拟试样对并由同一标准观察者评估时的失配。 标准随附一个磁盘，其中包含标准表3-6中MS Excel格式的光谱数据。

This standard specifies a method of assessing the spectral quality of the irradiance provided by a daylight simulator to be used for visual appraisal of colours or for colour measurements and a method of assigning a quality grade to the simulator. It specifies the maximum permissible deviation of the chromaticity of the simulator from the chromaticity of the CIE Standard Daylight Illuminant or CIE Daylight Illuminant being simulated, for a simulator to be graded by this method.The basis for the assessment is the special metamerism index for change in illuminant, using pairs of virtual (rather than real) specimens specified by their reflecting and fluorescing properties. The pairs of specimens are metameric matches under the CIE daylight illuminant, when evaluated with the CIE 1964 Standard Colorimetric Observer. The method described in this standard quantifies the mismatch when the pairs of virtual specimens are illuminated by the simulator under test and evaluated by the same standard observer.The standard is accompanied by a disk containing the spectral data of Tables 3-6 of the standard in MS Excel format.