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在G B 10072-88《照相用电子闪光装置技术条件》定义中,1.1 1光谱能量分布spectral energy distribution:闪光装置的光谱能量用三个数值的ISO光谱分布指数(描述闪光源相对于摄影昼光D_55,预期改变摄影的整个色彩程度的三个数的标志)表示,如ISO/SDI 4/0/2。国际标准ISO3028-84《摄影一照相机闪光照明光源一光谱分布指数(ISO/SDI)的测定》规定了摄影用闪光照明光源色彩质量的评定方法;规定了一次性闪光灯
In GB 10072-88, “Definition of technical conditions for photographic flash devices” 1.1.1 spectral energy distribution: The spectral energy of a flash device is expressed in terms of three numerical values of the ISO spectral distribution index (describing the flash source relative to photographic daylight D_55 , A sign of the three numbers expected to change the overall color of photography), such as ISO / SDI 4/0/2. International Standard ISO 3028-84 “Photographic-Camera Flash Illumination-Determination of Spectral Distribution Index (ISO / SDI)” provides a method of assessing the color quality of flash illumination sources for photographic purposes;