距离选通成像实现过程中若干问题的探讨  

Some questions in the realization of range gated imaging

作　　者：柏连发[1] 张毅[1] 陈钱[1] 顾国华[1] 

机构地区：[1]南京理工大学近程高速目标探测技术国防重点学科实验室,江苏南京210094

出　　处：《红外与激光工程》2009年第1期57-61,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金资助项目(60572107)

摘　　要：距离选通成像是解决水下激光微光成像后向散射噪声行之有效的方法之一。距离选通成像系统中蓝绿激光光源的脉冲特性、单脉冲能量及选通成像器件的选通性能将决定距离选通成像的距离分辨、探测距离等性能;距离选通成像过程中选通控制器与选通像增强器的直接电连接,将产生严重的干扰脉冲,影响距离选通成像的实现。在分析距离选通成像机理及距离选通水下成像系统方案的基础上,研究确定了蓝绿激光光源和选通成像器件的性能要求及技术指标;提出了激光脉冲同步距离选通成像方法,有效解决了距离选通成像中的干扰现象。在由国产蓝绿激光光源及选通像增强器构成的水下激光微光成像实验平台上实现了稳定的距离选通成像。Range gated imaging is one of the efficacious methods applied tot eliminating noise of under-water laser low level light imaging backward scattering. Distance resolution and detection distance performance of range gated imaging will be determined by light source pulse characteristic, single pulse energy of blue-green laser and range gated performance of imaging device. Also serious interferential pulse will be generated when electronic connection is completed electrically by range gated controller and range gated imaging intensifier, and the realization of range gated imaging will be affected. Based on the analysis of range gated imaging mechanism and underwater range gated imaging scheme, performance request and technical guideline of blue-green laser light source were studied and decided. Laser pulse synchronized range gated imaging method was put forward, and interferential phenomenon during range gated imaging was solved effectively. Stable range gated imaging was realized on the underwater laser low level light imaging experimental platform made of homemade blue-green laser light source and range gated imaging intensifier

关 键 词：后向散射 距离选通 距离分辨 光脉冲同步 

分 类 号：TN219[电子电信—物理电子学]