Research on Calibration Method for Small Luminous Flux Meters
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摘要: 光通量是评价光源能效的重要指标。小型光通量计是针对发光二极管、小型灯泡等光源测量光通量参数的专用仪器。光通量计的测量准确与否直接决定了光源光通量值的准确度。本文根据小型光通量计仪器自身特点,从分析光通量测量原理以及光通量传统校准方法出发,研究探讨了光照度法和辐射功率法两种新的校准方法。通过设计实验方案与搭建测试平台,对实验数据进行研究分析,总结了测量中需要注意的问题,对此类仪器的校准具有重要的参考意义。Abstract: The luminous flux is an important index in evaluating the energy efficiency of a light source. Small luminous flux meters are a special instrument for measuring luminous flux parameters of light sources such as light emitting diodes and small bulbs. The accuracy of the measurement of the luminous flux directly determines the accuracy of the luminous flux value of a light source. Based on the characteristics of a small-scale optical flux meter, this paper studies and discusses two new calibration methods, namely, illumination method and radiation power method, by analyzing the principles of optical flux measurement and the traditional calibration method of luminous flux. Through the design of an experimental scheme and the establishment of a test platform, the experimental data are studied and analyzed, and the problems needing attention in measurement are summarized, which can shed light on the calibration of such instruments.
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Key words:
- luminous flux /
- illuminance /
- radiation power /
- measurement /
- calibration method
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表 1 光照度法实验结果
Table 1. Experimental results of illumination method
开孔孔径/mm 光通量标准值/lm 光通量测量值/lm 修正系数 5 0.491 1.121 0.44 8 1.256 2.829 0.44 10 1.962 4.423 0.44 24 2.261 4.720 0.48 表 2 辐射功率法实验结果
Table 2. Experimental results of radiation power method
光源类型 532 nm激光光源 660 nm激光光源 开孔孔径/mm 光通量标准值/lm 光通量测量值/lm 修正系数 光通量标准值/lm 光通量测量值/lm 修正系数 5 1.511 3.256 0.46 0.104 0.232 0.45 8 1.511 3.465 0.44 0.104 0.241 0.43 10 1.511 3.382 0.45 0.104 0.236 0.44 24 1.511 3.186 0.47 0.104 0.212 0.49 -
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