The JJF 1990-2022 standard applies to the calibration of Light spectrum radiant luminance, luminance and chroma parameters for integrating sphere Standard light sources. The standard refers to several related documents, including luminance meter verification procedures, distribution (Color) temperature standard lamp verification procedures, and colorimetry related standards. Integrating sphere Standard light sources are widely used for calibration of charge-coupled devices (CCDs) and Light spectrum instruments, providing accurate and reliable Optical inspection standards for digital cameras, CCDs and space detectors. The standard describes the structure of the integrating sphere Light source, usually composed of an integrating sphere and a Light source. Light sources include tungsten halogen lamps, LED lamps or xenon arcs, and ensure the uniformity of the light outlet through internal reflection and coating. Integrating sphere inner wall coatings are often made of white diffuse reflection material to improve light uniformity and reflection efficiency, thereby ensuring Stability and Reliability of Light source output.