用于航空遥感的二维像移补偿镜的设计

在航空遥感中,由于振动、飞行器的运动及相机摆动等原因,相机在曝光时,被摄物影像与CCD之间存在着相对运动,带来了成像模糊及拖尾效应,此即像移.其存在对图像质量及精度都有很大影响,因此,怎样减少像移就成为提高遥感设备性能的重要手段。本文介绍了压电式二维像移补偿镜的工作原理,详细描述了其结构的设计以及功能的实现.设计了PZT压电陶瓷驱动补偿镜的柔性铰链平台,实现了补偿镜对CCD成像像移的二维补偿,并对像移补偿镜模型进行了性能分析,通过实验验证了像移补偿镜的性能.

Design of 2D Image Motion Compensation Mirror for Aerial Remote Sensing

In aerial remote sensing,due to the vibration,aircraft motion and swing,there is relative motion between the image of an object to be imaged and the CCD device when a camera is exposed.This will result in image blur and smearing effect,ie.image motion.The image motion has great influence on the quality and accuracy of an image.Therefore,the reduction of image motion has become an important way to improve the performance of remote sensors. In this paper,the operation principle of a piezoelectric 2D image motion compensation mirror is presented.The structure design and function realization of the mirror are described in detail.A flexible hinge platform for a PZT piezoelectric ceramic driving compensation mirror is designed.The 2D compensation of the compensation mirror to the CCD image motion is realized.The performance of the image motion compensation mirror model is analyzed and the performance of the image motion compensation mirror is verified experimentally.