部分相干光经色差透镜聚焦后的光谱开关现象  

The Phenomenon of Spectral Switch of Partially Coherent Light Focused by a Lens with Chromatic Aberration

作　　者：渠彪[1] 蒲继雄[1] 陈子阳[1] 

机构地区：[1]华侨大学信息科学与工程学院,福建泉州362021

出　　处：《光电子．激光》2006年第9期1142-1145,共4页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(6047704);福建省自然科学基金资助项目(A0510018)

摘　　要：实验研究了宽带部分相干光被会聚透镜聚焦,着重研究了聚焦透镜的色差效应对在透镜几何成像面的聚焦光场光谱的影响。结果表明,与入射光的光谱相比,在几何成像面的某些点部分相干光的归一化光谱呈现蓝移,而另一些点则呈现了红移;特别是某些点处光归一化光谱分裂为2个波峰,在临界点处光谱位移发生突变,即出现了光谱开关现象;归一化光谱的2个波峰在一些点处还可以继续分裂,且在临界点处的归一化光谱短波长区域再次出现光谱开关现象。这一结果对光谱的高精度测量以及新型的光谱开关的研究具有较重要的意义。We experimentally investigate the broadband partially coherent light focused by a focusing lens and especially the chromatic aberration effects of a focusing lens on the spectrum of the focusing light field at the geometrical-image plane. The experimental results show that,compared with the spectrum of the incident light, the normalized spectrum of the partially coherent light, at the geometrical-image plane, takes on blueshift at some observation points and redshift at others. In splits into two peaks at some observation po particular, the normalized spectrum of light nts,and the spectral shift changes rapidly at the critical point, i. e. the spectral switch occurs. Furthermore, each of the two peaks of the normalized spectrum still splits into two peaks at some points,and the spectral switch occurs again in the short-wavelength range of the normalized spectrum at the critical point. These results of investigation are significant to the high-precision measurement of spectrum and the research of new-style spectral switch.

关 键 词：光谱位移 光谱开关 部分相干光 聚焦透镜 色差 

分 类 号：O433[机械工程—光学工程]