基于面阵探测器的凝视成像激光雷达

摘要

本文介绍了一种基于面阵探测器的凝视成像激光雷达系统。整个系统分为三部分，第一部分是脉冲激光发射系统，采用中心波长为808 nm 的半导体堆叠激光器作为光源；第二部分是接收系统，由成像物镜，像增强器和面阵探测器组成。第三部分是计算机图像数据采集处理系统。系统使用分时的两次测量法，先后用恒定增益和线性增益两种方式对接收到的光强进行调制，由这两次测量得到的光强信息解调出距离信息。文章分析了系统的噪声特性，对给定的系统参数用仿真软件估计了距离误差。实验表明，系统的实际距离分辨力和仿真分析得到的距离分辨力相符。%In order to quickly obtain the three-dimensional structural information of targets, a staring imaging laser radar system is developed. The system consists of three parts. The first part is that of light emission. The pulsed laser diode stack with center wavelength of 808 nm was used. The second part is the receiver which is made up of objective lens, image intensifier and CCD camera. The third part is that of image capture and processing. Two images with constant gain modulation and linear gain modulation were obtained in two measurements, and the distance information was demodulated. The error based on noise model was analyzed and estimated for given parameters. Some experiments were made and the results were consistent with theoretical analysis.