A new traceability chain for luminance scale with LED-based transfer standard
A new traceability chain for luminance scale with LED-based transfer standard
复制标题
采用基于 LED 的传输标准的全新亮度标尺追溯链
DOI：
10.1088/1361-6501/aba93c
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发表时间：
2020
影响因子：
2.4
通讯作者：
Godo Kenji
中科院分区：
文献类型：
--
作者：
Yu Pan;Wu Min;She Jinhua;Liu Kang-Zhi;Nakanishi Yosuke;Godo Kenji
提出了一种新的发光二极管（LED）亮度测量的亮度标度溯源链，该链利用新开发的基于LED的亮度标准源（亮度标准LED）作为传递标准。与传统的LED亮度测量可追溯链相比，该方案具有双重优势。传统的LED亮度测量可追溯链依赖于亮度计将刻度从初级级转移到用户级。首先，在可追溯源处进行颜色校正，使用户从执行这项复杂的任务中解脱出来。其次，亮度标准LED作为参考光源，与亮度计进行对比测量，用户现场不需要其他扩展光源设施，如积分球。亮度标准led在7 mm直径范围内的空间均匀性优于±2.0%，运行8 h时的时间稳定性优于0.01%，验证了该led作为参考标准源的能力。亮度标准LED在照度到亮度转换实现的亮度尺度上进行校准，在溯源处估计校准不确定度为U= 1.4% ~ 1.7%（k= 2）。预计这将使用户能够获得与传统溯源方案相当的亮度测量不确定度，同时受益于所提出方案提供的高实用性。发光标准led现在用于日本新的可追溯链，有助于提高各种led产品（如显示器）亮度测量的可靠性。
A new traceability chain for luminance scale is proposed for light-emitting diode (LED) luminance measurement, which utilizes a newly developed LED-based luminance standard source (luminance standard LED) as a transfer standard. Compared with conventional traceability chains for LED luminance measurement that rely on either a luminance meter to transfer the scale from the primary to the user level, the proposed scheme has a two-fold advantage. Firstly, color correction is made at the traceability source and the user is freed from performing this complicated task. Secondly, the luminance standard LED acts as the reference source for comparison measurement with a luminance meter and no other extended source facilities such as integrating spheres are necessary at the user site. Performance evaluation of the luminance standard LEDs showed spatial uniformity better than±2.0% within a 7 mm diameter area and temporal stability of 0.01% during an 8 h operation, which verified the LEDs' capability to serve as a reference standard source. Calibration of the luminance standard LED was performed on the luminance scale realized by illuminance to luminance conversion, and the calibration uncertainty was estimated to be U= 1.4% to 1.7%(k= 2) at the traceability source. It is expected that this will enable users to obtain luminance measurement uncertainties comparable to the conventional traceability schemes while profiting from the high practicability that the proposed scheme provides. The luminous standard LEDs are now used in a new traceability chain in Japan, contributing to improved reliability of the luminance measurement of a wide range of LED-based products such as displays.