激光诱导荧光光谱在木材检测中的应用

当荧光物质被一束激光照射时,该物质的分子吸收能量后从基态跃迁到某一激发态上,由于激发态不稳定,分子再以辐射跃迁的形式发出荧光回到基态。荧光发射特性中荧光的光谱分布、荧光谱峰值强度和位置等能够较明显地区分不同物质。对松树、榆树和杨树进行分析,得到这些木材荧光光谱的共性,同时也注意到它们的特性,并进行归纳,作为判断树种的依据。

Application of laser-induced fluorescence spectrometry to the inspection of timbers

Whenever the fluorescent substances hit by a laser beam,the molecules absorb the energy,then jump from the lowest orbit to another provocation orbit.Because the provocation condition is so instable that the molecules then come back to the lowest orbit,glowing fluo-rescence.The distribution of the fluorescence spectrum,the peak intensity of the spectrum and its situation can make a clear distinction between different substances.By analyzing pines,elms and alamos,the common features of the fluorescence spectra of these timbers are obtained,as well as their individual features,which will be the basis of distinguishing different species of trees.