高分辨率全帧CCD相机电路系统的设计

Design of high resolution camera system based on full frame CCDs

基于Dalsa公司的面阵CCD评价板EKxxxx设计了一套高分辨率全帧CCD相机电路系统.系统采用专用集成芯片SAA8103和TDA9991构成时序发生器和驱动器,采用TDA9965进行前端信号处理.采用单片机对系统进行控制并应用Camera Link接口简化了体系结构.针对CCD多路输出时各通道存在不均匀性,提出采用两点校正法进行校正.该系统能以较高的帧频获取超高分辨率的图像,适用于航空拍摄、数字后背等场合.

A design of a high resolution camera system based on DALSA＇ s CCD evaluation kit EKxxxx was presented. It was composed of a pulse pattern generator （SAA8103）, a vertical line driver （TDA9991 ）, four analogto-digital interfaces （TDA9965） and a system controller （P89LV51RD2）. A camera link with medium configuration was adopted to transfer digital images. The software for controlling and debugging the camera was developed. To correct the non-uniformity of 4 outputs, a method based on two-point correction was described. The system can acquire ultra high resolution pictures at a high frame rate ; thus it is suitable for aero photography.