热光关联成像系统相干时间  

Coherence time of thermal light correlation imaging system

作　　者：袁志丹 李道远 赵达宇 张自力 郑志远 高禄 YUAN Zhidan;LI Daoyuan;ZHAO Dayu;ZHANG Zili;ZHENG Zhiyuan;GAO Lu(School of Mathematics and Physics,China University of Geosciences,Beijing 100083,China)

机构地区：[1]中国地质大学(北京)数理学院,北京100083

出　　处：《实验技术与管理》2021年第2期78-81,共4页Experimental Technology and Management

基　　金：国家自然科学基金(12074350);中国地质大学(北京)教学研究与教学改革项目(JGYB201628)。

摘　　要：该文使用赝热光源进行无透镜关联成像实验,并设计了适用于获得系统相干时间的简单测量方案。实验测量结果和理论证明显示,赝热光源的横向尺寸对相干时间没有明显影响,而用来产生赝热光源的毛玻璃转速对相干时间影响明显。不同相干时间的赝热光源进行关联成像实验,所得图像质量不同。In this paper, a pseudothermal light source is used to carry out a lensless correlation imaging experiment, and a simple measurement scheme which is suitable for obtaining the coherent time of the system is designed. The experimental results and theoretical proof show that the transverse size of the pseudothermal light source has no obvious effect on the coherence time, while the rotational speed of the ground glass used to generate the pseudo thermal light source has a significant effect on the coherence time. The image quality is different when the pseudo thermal light source with different coherence time is used in correlation imaging experiment.

关 键 词：二阶关联 相干时间 可见度 分辨率 

分 类 号：O431.2[机械工程—光学工程]