摘要
为了在无损状态下获得圆截面发光体内部谱线强度空间相对分布,提出了利用Abel变换,将被检对象外部的逐层扫描数据通过3次样条函数方法数值求解,从而得到被检对象内部参数分布情况的实验方法。运用该方法对汞发光体的577、405nm和365nm特征谱线进行了测量和计算,结果表明:3条谱线具有相似的分布规律,在靠近发光体中心处发光最强,然后沿径向迅速衰减,当半径r>1.5mm时,发光强度几乎趋于零。汞发光体内部谱线相对强度的这一变化规律主要决定于电极形状。这种研究方法也可以用来测量其他具有球对称或轴对称性发光体或辐射体(如火焰、电弧等)的内部强度相对分布。
In order to obtain spectrum intensity distribution inside a circular luminant without damage, a measuring method depending on Abel transform was developed. According to this method, the inside parameter distribution was calculated from an outside scan data by cubic spline functions. The spectrum intensity distributions of 577nm, 405nm, and 365nm of Hg light were measured and calculated. The results indicated that three spectral lines performed a similar distribution, the intensity reached the maximum close to the center of the luminant; it then decreased rapidly along its radius, almost reaching zero at the radius. This distribution rule was decided on by the electrodes＇ shape. This method can be also used to study the inside intensity distributions of other luminants and radiators with spherical or cylindrical symmetry.
出处
《北京印刷学院学报》
2007年第6期75-77,共3页
Journal of Beijing Institute of Graphic Communication
关键词
发光体
谱线
弦积分
Abel逆变换
luminant
spectrum
line-integration
inverted Abel transform
