Through the experiment, it is indicated that regulated direct power makes the light source stable and provides the accurate UV radiation calibration with stable ultraviolet light source.
实验结果表明，带有光反馈的恒压恒流直流电源发光稳定，为精确紫外辐射定标提供了高稳定度的紫外光源。
Photochromic compound is characterized of changing from one colour to another under UV radiation and returned to be colourless after removal of the light source.
其性能显示出某个颜色的变化，在紫外光辐射下曝光从一个颜色变成另一种颜色。然后在撤换光源后又转变回无色状态。
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