强度涨落在热光鬼成像中的作用  

The role of intensity fluctuations in thermal ghost imaging

作　　者：刘雪峰[1] 姚旭日[1] 李明飞[2] 俞文凯[1] 陈希浩[1,3] 孙志斌[1] 吴令安[2] 翟光杰[1] 

机构地区：[1]中国科学院空间科学与应用研究中心,空间科学实验技术研究室,北京100190 [2]中国科学院物理研究所,北京凝聚态物理国家实验室,光物理重点实验室,北京100190 [3]辽宁大学物理学院,沈阳110036

出　　处：《物理学报》2013年第18期198-204,共7页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(批准号:2010CB922904);国家自然科学基金(批准号:60978002,61274024);国家高技术研究发展计划(批准号:2011AA120102)资助的课题~~

摘　　要：热光鬼成像的图像质量在实际应用中具有重要作用.通过理论分析和数值模拟,发现光场的强度涨落程度会影响热光鬼成像的对比度,基于此,提出可以通过调节热光场的平均强度和强度波动的方差来提高成像对比度,并且研究了这一方法对成像信噪比的影响.将这种方法与另一种提高成像对比度的方法—–高阶鬼成像进行了对比,所得结果将有助于提高对热光鬼成像的理解.The quality of the image in ghost imaging with thermal light is of great importance in practical applications. Through theoretical analysis and simulation, we find that the intensity fluctuations of the field can greatly influence the visibility of thermal ghost imaging. According to this, we suggest a new scheme to improve the visibility by appropriately scaling the intensity and variance of the incident thermal field. The influence of this method on the signal-to-noise ratio is also studied. In addition, comparison is made with the high- order correlation ghost imaging, another means adopted in recent years to increase the visibility. Our analysis should help promote our understanding of thermal ghost imaging.

关 键 词：鬼成像 强度涨落 对比度 信噪比 

分 类 号：O438[机械工程—光学工程]