This standard specifies light measurement terms, color measurement terms, vision terms and other terms. This standard is applicable to colorimetry, photometry and fields related to color standardization.
2 Normative References
The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. At time of publication, the editions indicated were valid. All the standards will be revised, and all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of the following standards are applicable. GB/T 15608-1995 The Chinese Color System
3 Light Measurement Terms
3.1 Light Electromagnetic radiation which generates bright and color sensation to human ocular system, it is also called as visible electromagnetic radiation. Generally, the wavelength range is 380nm~780 nm. 3.2 Spectral concentration The ratio of the radiation quantity X (i.e. radiant flux, irradiance and radiance, etc.) within the range of minute wavelength width and with wavelength λ as the center to the width of this wavelength.
