基于Camera Link 协议的CCD图像采集系统

为满足航天相机系统快速、高质量的成像要求，设计了一种基于Camera Link协议的高速CCD (Charge Coupled Device) 图像采集系统。该系统采用CPLD (Complex Programmable Logic Device)、专用视频处理芯片TDA8783、乒乓结构的存储器进行设计，并使用时间延迟积分(TDI:Time Delay Integral)的工作方式，通过设置单级积分时间长度和积分级数改变总积分时间长度。实验结果表明，该系统能同时输出两路CCD电压信号，最高数据输出速率达15帧/s，信噪比大于50 dB，两通道的不均匀性小于2％，满足航天相机系统的高速、高分辨率设计要求。

Area-CCD Image Acquisition System Based on Camera Link Protocol

In order to meet space camera system application, a high speed CCD(Charge Coupled Device) image acquisition system based on Camera Link is designed. CPLD（Complex Programmable Logic Device） is used for timing and logic control; CCD processor TDA8783 is used for high speed A/D converting; ping pong structure memories are used for high speed transmission and meeting Camera Link protocol.TDI（Time Delay Integral）mode is used to meet the interline CCDs bad quality and lower SNR（Ratio Signal to Noise） result for low fill factor and quantum efficiency,through setting the TDI stage and integral time of TDI.The results show that the CCD driver system can output two groups of CCD signals simultaneously in data output speed of 15 frame/s,SNR exceed 50 dB, channel asymmetric less than 2％.The driver system can meet the neqiciremeut of the camera system because of its good function and low cost.