一种便携式漫反射LED均匀光源的设计与实现

为了满足光电探测仪器校准修正过程中对标准光源的要求，设计了一种采用积分球技术，通过纽扣电池供电的便携式漫反射LED均匀光源。给出了光源的装配图、主要零件3D图及电路图，并对其进行了详细说明。通过Matlab分析光源出光口CCD照片各像素的灰度值，得到出光口?14 mm范围内光强均匀度为95.1%；采用Ocean Optics USB 2000+型光谱仪分析光源出光口光强均匀性及漫反射性，得到沿出光口径方向2个位置光强与中心光强相比，分别下降了2.93%和6.30%的结果。光源出光口平面旋转10°，中心位置光强下降6.30%。测试分析表明:设计的光源具有较好的均匀度和漫反射性，在光电探测仪器校准方面具有一定的应用价值。

Design and implementation of portable LED uniform light source with diffuse reflection

In order to meet the needs for standard light source of photoelectric detectors during calibration and correction, using the integrating sphere technology, it was designed that a button battery-powered portable LED uniform light source with diffuse reflection. The assembly drawings, main parts 3D drawing and circuit diagram of the light source were given and detailed described. By analyzing the gray value of each pixel of charge coupled device (CCD) photograph at light source outlet using Matlab, it was found that the light intensity evenness was 95.1% in ?14 mm range of light outlet. Besides, through the analysis of light intensity uniformity and diffuse reflection of light outlet by Ocean Optics USB 2000+ spectrometer, it was found that the light intensity dropped by 2.93% and 6.30%, respectively, at two positions along the light outlet radial direction, compared with the central position.The light intensity of central position was suppressed by 6.30% when the flat of light outlet was rotated 10°.Test analysis results show that the light source has a good uniformity and diffuse reflection, the design has some practical and reference values for photoelectric detectors calibration.