【作者】 李丽莎；

【导师】 佟首峰；

【作者基本信息】 长春理工大学 ， 光学工程， 2010， 硕士

【摘要】 随着对超稳激光器、新型光束控制器、高灵敏度和高数据率接收器和适合空间应用的先进通信电子设备的研究基本成熟,空间光通信成为了下一代光通信的发展方向。它具有如下有特点:很强的抗干扰性、安全系数高、可靠性高。捕获、对准、跟踪是自由空间光通信的重要组成部分,而其中的精跟踪部分是整个系统中最为重要的。因此,迅速,精确的得到光斑的具体坐标,从而控制倾斜镜来实现视轴准确的对准,是APT系统中最为核心的技术。本文设计了一种基于双线阵CCD的激光光斑质心检测系统,满足了APT精跟踪系统快速,精确的对准要求。首先光束通过分光棱镜组成的光学系统,将光束在横纵坐标轴上分别成像,再由双线阵光电耦合器件接收,然后将接受到的信息经模数转换后,通过USB接口传送到上位机,然后由上位机经事先编写好的处理软件程序进行处理,实时得到激光光斑的质心坐标,最终达到APT精跟踪对探测器采样速率每秒3000帧、检测精度0.8μrad的要求。更多还原

【Abstract】 Space Optical Communication will become the new direction of communication with the development of the high stable laser, laser controller, high sensitive receiver and electronic devices which are used for optical communication. There are many characteristics, such as, strong anti-interference, safety factor, high reliability. Capture, alignment, tracking is a free-space optical communications, an important part of the essence of which is the whole system to track some of the most important. Therefore, the rapid and precise coordinates of a specific spot will control the visual axis by tilt mirror to achieve an accurate alignment.This paper designs laser spot detecting system based on bi-linear CCD to meet the requirement of precision tracking and accurate alignment of APT. First, the beam through the prism optical system, is imaged in the vertical and horizontal axis, and then received in bi-linear CCD. The converted signal is sent to the host computer by USB interface and processed by the software to get the orientation of the spot. The spot centronic coordinates were acquired by software in the end. The sample rate of the two linear CCDs could reach to3000 frames per second and the detecting accuracy could reach to 0.8μrad as the Fine Tracking System required.更多还原