lEd实时光谱能反映lEd动态光学特性的变化情况,光谱的测量要求光谱仪在合适的积分时间条件下完成从收集光子到处理数据的过程。利用Hr4000光谱仪、gS610源表和gPIb控制卡,开发了1套基于dElPHI7.0的实时光谱数据采集系统,该系统能快速、精确地采集lEd光谱并计算色坐标、色温、峰值波长等光学特性参数。同时还设计了1种基于二分法的自动设置光谱仪积分时间的计算方法,实现了对lEd稳态、瞬态光谱实时测试的数据采集和处理,并通过实验分析,研究了瞬态测量方法的可行性以及条件。Real-time spectrum can reflect dynamic optical properties of LEDs.To meet the spectrum measurement requirement,the spectrometer shall own the capability of collecting photons and processing the data under the appropriate integration time.By using HR4000 spectrometer,GS610 source and GPIB control card,a Delphi7-based spectral data acquisition system is developed,which can instantly and accurately collect LED spectrum and calculate other optical parameter,such as color coordinate,color temperature,peak wavelength.Besides,we designed an algorithm to set the integral time of spectrometer automatically based on the dichotomy method.The system can realize both the steady and transient data acquisition and processing of LED spectrum.By experimental analysis,the feasibility of transient measuring method and condition has also been studied.国家自然科学基金(11104230); 福建省重点项目(2012H0039); 福建省产学重大项目(2011H6025;2013H6024
