LED光学参数测试方法研究

通过分析LED（发光二极管）发光机理和封装特点，选择了LED需要测试的光学参数：光通量、亮度、发光强度、空间光强分布、相对光谱功率分布及色度，进而研究了每个光学参数的特点。根据其特点，制定了每个光学参数的测试原理以及相应的计算公式，最终确定了各参数的测试方法。设计了LED光通量测量系统、亮度和发光强度测量系统、发散角及空间光强分布测量系统、相对光谱功率分布及色度测量系统。实际应用表明：这些系统均能满足目前工作需要。

Measurement of optical parameters for LEDs

Based on the analysis of LED luminous mechanism and packaging features,some of the optical parameters were selected for testing LED,such as luminous flux,luminance,luminous intensity,spatial light intensity distribution,relative spectrum power distribution and colorimetry.The features of these parameters were investigated.The test principles,the corresponding formulas and the measurement methods are proposed for these parameters.The luminous flux measurement system(LFMS),luminance & luminescence intensity measurement system(LLIMS),divergence angle & spatial light intensity distribution measurement system(DASLIDMS) and relative spectrum power distribution & colorimetry measurement system(RSPDCMS) were designed based on LED luminous mechanism and packaging features.The practical application shows that these systems can meet the requirements of the engineering applications.