基于黑体辐射非相干光的计算鬼成像研究  

Computational ghost imaging with incoherent light from blackbody radiation

作　　者：杨光 隋春雨 贾婷婷 刘占栋 李宗国 李洪国 YANG Guang;SUI Chunyu;JIA Tingting;LIU Zhandong;LI Zongguo;LI Hongguo(School of Science,Tianjin University of Technology,Tianjin 300384,China)

机构地区：[1]天津理工大学理学院,天津300384

出　　处：《光电子．激光》2021年第11期1216-1220,共5页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(11604243);天津市自然科学基金项目(16JCQNJC01600)资助项目。

摘　　要：近年来,鬼成像在远距离成像特别是遥感成像领域的应用取得重要进展。为了促进日光鬼成像在此领域的应用,本文研究基于黑体辐射非相干光的计算鬼成像,首先根据黑体辐射的强度概率密度函数得到描述计算鬼成像质量的衬噪比(contrast-to-noise ratio,R_(CN))表达式,接着融合切片采样思想利用计算机生成模拟黑体辐射的随机散斑图,最后利用数字光投影仪调制产生模拟黑体辐射光源的随机调制光,并以此为光源实验上实现反射式物体的计算鬼成像,重建得到了不同测量帧数条件下物体的"鬼像"并测量了描述成像质量的衬噪比。结果一方面表明在随机调制散斑强度(灰度)平均值约为160时,成像质量相对较好,另一方面表明随着测量帧数分别从2000增加到4000、6000、8000、12000、20000,图像的衬噪比从0.8795逐渐增大至1.241、1.516、1.755、2.100、2.371,实验结果和理论分析基本一致。该结果对于以太阳光等近似看成黑体辐射的非相干光为光源的鬼成像在远距离成像等领域的应用具有重要意义。In recent years,important progress has been made in the application of ghost imaging to long distance imaging,especially remote imaging.In this paper,in order to promote the application of ghost imaging with sunlight,we study computational ghost imaging with incoherent light from blackbody radiation.Firstly,according to the intensity probability density function for blackbody radiation,we obtain the expression for the contrast-to-noise ratio R_(CN) describing the image quality of computational ghost imaging.Then the random speckle patterns mimic blackbody radiation are generated through the computer program based on slice sample theorem.Finally,we employ digital light projector to generate random modulated light,and then we experimentally realize computational ghost imaging of reflective object using this modulated light.The ghost images of reflective object are reconstructed under the condition that several different measurement frames and the corresponding R_(CN) of the images is measured.The results,on one hand,show that the image quality is the best when the average value of random speckle intensity(gray)is about 160,and on the other hand,it shows that as the number of measurement frames increases from 2000 to 4000,6000,8000,12000,and 20000,the R_(CN) of the image increases from 0.8795 to 1.241,1.516,1.755,2.100,and 2.371.The experimental results are in consistent with the theoretical analysis.This result is helpful to promote the application of ghost imaging with sun light(which can be considered as blackbody radiation)in long distance imaging etc.

关 键 词：散斑成像 黑体辐射 计算鬼成像 衬噪比 

分 类 号：O438.2[机械工程—光学工程]