部分相干光经单缝衍射后的光谱变化  

The Spectral Changes of Partially Coherent Light Diffracted by a Slit

作　　者：饶连周[1] 渠彪[2] 陈子阳[2] 蒲继雄[2] 

机构地区：[1]三明学院物理与机电工程系,福建三明365004 [2]华侨大学电子科学与技术系

出　　处：《光子学报》2007年第3期467-470,共4页Acta Photonica Sinica

基　　金：国家自然科学基金(60477041);福建省自然科学基金(A0510018);福建省教育厅科技项目(JA06048)资助

摘　　要：从几何成像规律和交叉谱密度函数的传输定律出发,从理论和实验两方面研究多色谢尔模型光束经单缝衍射后光场的光谱变化现象.理论研究结果表明:部分相干光谱经单缝衍射后,在衍射光场的某些点,光谱相对于光源的光谱往短波方向移动,即为蓝移;而在衍射光场的另一些点,光谱呈现红移.实验结果与理论结果符合得很好.Starting from the geometrical-imaging law and the propagation law of the cross-spectral density function,the phenomena of spectral changes of polychromatic Schell-model beams diffracted by a slit were theoretically and experimentally investigated. The theoretical results show that, compared to the source spectrum,the normalized spectrum in some points of the diffracted field is blueshifted, and in the other points of the diffracted field the normalized spectrum is redshifted. It is shown that the experimental results are consistent with the theoretical ones.

关 键 词：光谱变化 部分相干光 聚焦透镜 

分 类 号：O433[机械工程—光学工程]