普朗克轨迹是白炽灯黑体辐射器的颜色随其温度变化在色度空间中的变化路径。它通常绘制在CIE 1931 xy色度图上,呈现为一条从红橙色区域到蓝白色区域的圆弧。它是定义色温的基本参考。

普朗克轨迹是白炽灯黑体辐射器的颜色随其温度变化在色度空间中的变化路径。它通常绘制在CIE 1931 xy色度图上,呈现为一条从红橙色区域到蓝白色区域的圆弧。它是定义色温的基本参考。
The Planckian locus is a direct graphical representation of Planck’s law within the 框架 of human color perception. After the International Commission on Illumination (CIE) standardized the 1931 color space, it became possible to plot the color of any light source as a coordinate pair (x, y). By calculating the (x, y) coordinates for a perfect black-body radiator at every temperature from about 1000 K to over 10,000 K and connecting these points, the Planckian locus is formed.
This curve is not a straight line. It starts in the deep red part of the diagram at low temperatures, curves up through orange, yellow, and white near the center, and ends in the blue region at very high temperatures. Its significance lies in being the absolute reference for ‘white’ light produced by thermal radiation. Any light source whose chromaticity coordinates fall exactly on this locus has a color temperature equal to the black-body temperature at that point. For sources not on the locus, it serves as the reference for finding the closest point, which defines the correlated color temperature (CCT).
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普朗克轨迹
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