A method for online detection and lifespan evaluation of light sources
作者机构：College of Optical and Electronic TechnologyChina Jiliang UniversityHangzhou310018China
出 版 物：《Optoelectronics Letters》 (光电子快报（英文版）)
年 卷 期：2023年第19卷第11期
页 面：693-697页
核心收录：
主 题：lifetime fitted integrating
摘 要：Light emitting diode(LED) light source degradation detection and lifetime evaluation usually use the data of light flux change as a basis,but the process of light flux measurement is complicated and tedious,requiring the use of an integrating sphere,and cannot be performed *** is unfriendly to the detection of machine vision light sources used in production *** address this problem,this paper proposes and designs a method for online detection and lifetime evaluation of light sources by using a mini spectrometer to detect the intensity of light sources online,and evaluates the light degradation and lifetime of light sources based on the changes in light intensity during *** determines whether the light source needs to be adjusted or replaced,avoiding misjudgment or missed judgment in production detection due to light source *** experiment was conducted on LED under high-temperature accelerated *** light intensity data after aging was fitted by an acceleration and life evaluation model,and the fitting result showed that the error of life evaluation by this method was 8.37%.As a comparison,this paper also detects the changes in light flux of light sources during the experiment,and the average error between the decay of light intensity and the decay of light flux was only 0.102%.It has been validated that the error in evaluating the lifetime of light sources using this method is 10.71%,and the accuracy of the evaluation is about 90%.The results show that the method is accurate,reliable,and can be used as a basis for online detection and evaluation of LED light source degradation.
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