Investigations of range accuracy for long-range three-dimensional active imaging  

作　　者：张秀达 严惠民 周琴 

机构地区：[1]State Key Laboratory of Modern Optical Instrument, National Engineering Research Center for Optical Instrument, Optical Engineering Department, Zhejiang University

出　　处：《Chinese Optics Letters》2011年第6期48-50,共3页中国光学快报（英文版）

基　　金：supported by the National "863" Program of China (No. 2009AA12Z142);the National Natural Science Foundation of China (No. 40901166)

摘　　要：Distance resolutions and noises are analyzed experimentally for long-range three-dimensional （3D） active imaging systems that have signal-to-noise ratios （SNRs） more optimal than 30：1. Findings indicate that the photon shot noise primarily determines the SNR. However, the active imaging method, which has a relatively low SNR, generates a relatively high distance resolution. To explain this phenomenon, a theory in which the distance resolution of 3D active imaging systems is determined by both the photon shot noise and the subinterval width is developed. Theoretical and experimental results differ by less than 4%.Distance resolutions and noises are analyzed experimentally for long-range three-dimensional （3D） active imaging systems that have signal-to-noise ratios （SNRs） more optimal than 30：1. Findings indicate that the photon shot noise primarily determines the SNR. However, the active imaging method, which has a relatively low SNR, generates a relatively high distance resolution. To explain this phenomenon, a theory in which the distance resolution of 3D active imaging systems is determined by both the photon shot noise and the subinterval width is developed. Theoretical and experimental results differ by less than 4%.

关 键 词：Imaging systems PHOTONS Shot noise Signal to noise ratio 

分 类 号：O438[机械工程—光学工程]