Reduction of interference fringes in absorption imaging of cold atom cloud using eigenface method  

作　　者：李晓林 柯敏 颜波 王育竹 

机构地区：[1]Key Laboratory for Quantum Optics Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences

出　　处：《Chinese Optics Letters》2007年第3期128-130,共3页中国光学快报（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China (No. 10334050 and 10474105);the State Key Basic Research Program (No. 2006CB921202).

摘　　要：Eigenface method used in face recognition is introduced to reduce the pattern of interference fringes appearing in the absorption image of cold rubidium atom cloud trapped by an atom chip. The standard method for processing the absorption image is proposed, and the origin of the interference fringes is analyzed. Compared with the standard processing method which uses only one reference image, we take advantage of fifty reference images and reconstruct a new reference image which is more similar to the absorption image than all of the fifty original reference images. Then obvious reduction of interference fringes can be obtained.Eigenface method used in face recognition is introduced to reduce the pattern of interference fringes appearing in the absorption image of cold rubidium atom cloud trapped by an atom chip. The standard method for processing the absorption image is proposed, and the origin of the interference fringes is analyzed. Compared with the standard processing method which uses only one reference image, we take advantage of fifty reference images and reconstruct a new reference image which is more similar to the absorption image than all of the fifty original reference images. Then obvious reduction of interference fringes can be obtained.

关 键 词：Light absorption Light interference Pattern recognition RUBIDIUM Signal to noise ratio 

分 类 号：O431.2[机械工程—光学工程]