基于光子数目比较的激光测距法  

A Laser Ranging Method Based on Photon Statistics

作　　者：赵栋[1] 刘立人[1] 王吉明[1] 郎海涛[1] 潘卫清[1] 刘锡民[1] 

机构地区：[1]中国科学院上海光学精密机械研究所,上海201800

出　　处：《光学学报》2006年第7期1091-1096,共6页Acta Optica Sinica

摘　　要：提出了一种新颖的激光测距方法。该方法避开了传统激光测距法中使用复杂辅助电子设备对脉冲计时或比较相位差的过程,而主要通过光学手段分析和提取待测距离信息,最终通过比较大量光子数目的方法求得待测距离。并利用单轴晶体的双折射和全内双反射性质,用特殊结构的单块LiNbO3晶体设计了实施该方法的主体装置。结果表明,该激光测距法同目前普遍使用的激光测距法相比,不但简化了结构,而且有很高的测距精度,从而为激光测距开拓了一种新的思路。A novel laser ranging method is proposed. This method avoids the processes of timing the pulse intervals or comparing the phase differences, which are done by using complex electric devices in traditional laser ranging methods. In the proposed method, the required range information is analyzed and abstracted mainly by optical ways, and is obtained by comparison of a large number of photons ultimately. Based on birefringence and total internal double reflection effects in single axis crystal, a single block LiNbO3 crystal with special structure is designed as the key device in the proposed method. The results show that this method not only simplifies the structure of devices, but also has a high precision, comparing with the traditional laser ranging methods. So a new thicking way for the laser ranging is provided.

关 键 词：光学测量 激光测距 电光调制 双折射 全内双反射 光子统计 

分 类 号：O435.1[机械工程—光学工程]