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Development of LED-based standard source for total luminous flux calibration

机译：开发基于LED的标准光源进行总光通量校准

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摘要

For total luminous flux calibration by a sphere-spectroradiometer system in 2tc geometry, a new LED-based standard light source (standard LED) covering the full visible wavelength range has been developed. The developed standard LED has sufficient spectral power over the full visible wavelength range using UV-LED dies of different peak wavelengths in combination with red, green and blue phosphors. By evaluating spectrum flatness based on the magnitude of the second derivative, the spectrum of the standard LED was customised to minimise the measurement uncertainty. Properties of the standard LED such as the luminous intensity distribution, stability and reproducibility were also evaluated. The evaluation results indicate that the standard LED has good properties as a standard light source for the 2π total spectral radiant flux scale. Furthermore, the result of an operating current dependence suggests that the standard LED has benefits as a standard source that conventional standard lamps do not have.
机译：为了通过球形光谱仪在2tc的几何结构中对总光通量进行校准，已经开发了一种覆盖整个可见光波长范围的基于LED的新型标准光源（标准LED）。开发的标准LED使用不同峰值波长的UV-LED芯片与红色，绿色和蓝色磷光体组合使用，在整个可见光波长范围内具有足够的光谱功率。通过基于二阶导数的幅度评估光谱平坦度，可以定制标准LED的光谱，以最大程度地减少测量不确定度。还评估了标准LED的属性，例如发光强度分布，稳定性和可重复性。评估结果表明，标准LED具有良好的性能，可作为2π总光谱辐射通量标度的标准光源。此外，工作电流依赖性的结果表明，标准LED具有作为常规标准灯所不具有的标准源的优势。

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