发光二极管光谱参数测试方法的研究

Research on Measurement of Spectrum Parameters in LED

影响发光二极管 (L ED)颜色的光谱参数有 :峰值波长、带宽、主波长和质心波长。峰值波长和带宽反映了 L ED发光的物理特性 ,主波长反映了 L ED发光的目视感觉 ,质心波长是 L ED的几何对称波长。用分光光度法和 CCD器件测量 L ED的光谱参数 ,精度达 1nm。用质心波长来估算主波长 ,误差小于3nm。

Peak wavelength,bandwith,domain wavelength,and centroid wavelength are factors affecting on light color of LED.Peak wavelength and bandwith stand for the physical property of light of LED,domain wavelength corresponds to feel of eyes,centroid wavelength is geometric symmetry wavelength of LED.They were measured using concave dispersion system and CCD.Their accuracies are 1 nm.Domain wavelength was estimated by centroid wavelength,its error is less than 3 nm.