紫外线发光二极管(UV-LED)是新一代紫外线光源,紫外线输出量是最关键的特性参数。为了测量UV-LED的紫外线输出量,提出了用化学曝光剂捕捉UV-LED发射出的紫外线所有光子的测量方法。单位时间内捕捉到的所有光子的能量总和就是紫外线输出量。由于KI/KIO3化学曝光剂是液体,通过旋转可形成漩涡, 将UV-LED置于漩涡中,既不接触液体,又能捕捉所有从UV-LED发出的光子,从而准确测量UV-LED的紫外线输出量。测量过程中,UV-LED的热量被引到一个水箱,保持UV-LED的结温稳定。结果表明,通过仔细的操作,KI/KIO3化学曝光剂的测量是可控的,实验数据显示,测量数据的离散系数在0.02~0.079范围内。
Abstract
UV-LED is a new generation of UV source, and its UV output is the key parameter. In order to measure the UV output of a UV-LED, a method to use a chemical actinometer to capture all of UV photons from UV-LED is proposed. The total energy of all photons captured in a certain time is the UV output. Since chemical actinometer is liquid, a vortex can be formed by rotation, and then a UV-LED is set inside the vortex. In such a case, UV-LED doesn’t touch the liquid, and the liquid captures all of photons from the UV-LED. Consequently, the UV output of a UV-LED can be accurately measured. In the process of the measurement, the heat generated by UV-LED is led to a water tank to keep the junction temperature of UV-LED to be stable. The KI/KIO3 actinometer is controllable through careful operations. The experimental results indicate that the discrete coefficients of the experimental data are in the range of 0.02~0.079.
关键词
计量学 /
紫外线输出量 /
紫外线发光二极管 /
KI/KIO3化学曝光剂
Key words
metrology;UV output /
UV-LED;KI/KIO3 chemical actinometer
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基金
深圳市科技计划项目(JCYJ20180306170551939,JCYJ20200109150612249);无锡华兆泓光电科技有限公司研发基金(HZHYF2020-3);深圳市晶宏照明有限公司研发基金(JH2021Y1)
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