LED器件光强分布测试方法进展

针对LED器件光强分布的测试方法,在传统光源配光曲线的测试原理的基础上,阐述了旋转法、多探测器法测试LED光强分布的方法。由于这些方法存在测试时间长、测量准确度低以及定标繁琐的缺陷,进而介绍了一种新型测试方法及装置,即通过CCD光度探测器接收光强度,经过CCD的光电转换功能将光强度信号转换为电信号,再通过成像系统软件便可得到整个半球面空间内壁的光强图。新的测试方法具有测试速度快、精度高、信息量丰富和直观性的显著优点。

Abstract

The paper introduced the principles of the light distribution of traditional light sources, and described the method of rotation and multi-detector method for testing LED light intensity distribution. Then, the paper pointed out the defects of them, i.e. long measurement time, low measurement accuracy and calibration complexity. Thereby the paper introduced a novel method. An optical detector receives the light intensity by a CCD, and light intensity is converted to an electrical signal. Then, the software of the system can obtained a light intensity spatial map by imaging the entire inner wall of the hemispherical surface. This method has high test speed, high precision, information-rich and intuitive significant advantages.

参考文献

[1] 任豪,王巧彬,李康业,等.LED光源光强空间分布特性的快速测试［J］.光学仪器,2008,30(6):6-9.

[2] 张九红,庄金迅.配光曲线在照明计算中的应用［J］.沈阳建筑大学学报,2007,23(6):941-944.

[3] 王巧彬,任豪,罗宇强,等.基于LabVIEW的LED三维特性检测的研制［J］.应用光学,2009,30(3):460-464.

[4] 费翼.LED光强测试仪［J］.光电子技术,1992,12(3):313-318.

[5] 李天保,梁建,许并社.光子晶体提高GaN基LED出光效率的研究进展［J］.半导体光电,2010,31(3):339-343.

[6] FAN S H,VILLENEUVE P R,JOANNOPOULOS J D,et al.High extraction efficiency of spontaneous emission from slabs of photonic crystal［J］.Physical Review Letters,1997,78(17):3294-3296.

[7] WICK K,RUDDICK K.An accurate measurement of gusing falling balls［J］.American Journal of Physics,1999,67(11):962-963.

[8] KANG J H,KIM H G,RYU J H,et al.Enhancement of light output power in InGaN/GaN LEDs with nanoroughed hemispherical indium tin oxide transparent ohmic contacts［J］.Electrochemical and Solid-State Letters,2010,13(2):D1-D3.

[9] BEARD K V.Terminal velocity and shape of cloud and precipitation drops aloft［J］.Journal of Atmospheric Sciences,1976,33(5):851-864.

[10] FUJII T,GAO Y,SHARMA R,et al.Increase in the extraction efficiency of GaN-based light-emitting diodes via surface roughening［J］.Applied Physics Letters,2004,84(6):855-857.

孙浩杰, 李梦远, 庄杰, 李柏承, 张大伟, 杨卫桥. LED器件光强分布测试方法进展[J]. 光学仪器, 2014, 36(6): 555. SUN Haojie, LI Mengyuan, ZHUANG Jie, LI Baicheng, ZHANG Dawei, YANG Weiqiao. Research on LED light intensity distribution test methods[J]. Optical Instruments, 2014, 36(6): 555.

LED器件光强分布测试方法进展

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