军用相变型光学头伺服方法的研究  

On the Focusing and Tracking Servoes in a Military Optic Head of the Phase-Change Type

作　　者：罗晔[1] 陈海清[1] 阮玉[1] 

机构地区：[1]华中理工大学光电子工程系

出　　处：《华中理工大学学报》1997年第4期16-17,25,共3页Journal of Huazhong University of Science and Technology

基　　金：国家"八五"军事电子预研重点项目

摘　　要：对军用相变型光学头中所采用的聚焦和轨道伺服方法（即临界角法聚焦伺服和推挽法轨道伺服）进行了理论分析，建立了伺服信号的数学模型，并对伺服范围进行了讨论。根据军用要求，提出了改善伺服信号质量、拓宽伺服范围的方法。The methods of focusing servo and tracking servo for use in a military phase-change optichead are analyzed.A mathematical model for the servo signal is developed and the servo range is dis-cussed.Based on an analysis of the military environment and requitements of military application,asecond-level reinforcing design scheme for the servo system is proposed.For the internal reinforce-ment,the multi-transmission method is adopted to improve the gain and the sensitivity of the servosignal of the focusing error,the processing circuits are used to compensate for the linearity of the de-tection signal and the method of widening the servo range is suggested.

关 键 词：相变型光学头 聚焦伺服 轨道伺服 光存贮器 

分 类 号：TP333.4[自动化与计算机技术—计算机系统结构]