红外搜索跟踪系统中消旋棱镜的设计与调试

摘要

利用扫描反射镜扩大搜索范围是红外搜索跟踪系统中普遍采用的方式,扫描反射镜旋转产生的像旋可以由消旋棱镜进行消除.为得到符合实际工程需要的消旋棱镜,分析了棱镜影响系统的主要因素,并在此基础上,获得棱镜参数.为保证棱镜在系统中的正常工作,在分析棱镜装调误差的前提下,进行棱镜组件的调试.结果表明,棱镜设计与调试满足系统使用要求.%Using a scanning mirror to acquire large field of view is an usual scheme in infrared search and tracking system (IRST). When the scanner rotates around optical axes, the image rotates on the detector simultaneously. Halfspeed prism can correct the image rotation. In order to find appropriate prism, it is necessary to analyze the prism factors impacting on IRST. The prism parameters are obtained based on the analysis. Before assembling the prism,it must be adjusted for working normally. Test results show that the prism satisfies the demand of IRST.