摘要
调焦机构是变焦距镜头中重要的组成部分,目前对变焦距镜头调焦主要采用凸轮机构的变焦方式,其缺点是体积大、效率低、精度差。为此本文提出了直线驱动的方式进行调焦的原理与方法,介绍了一种应用系统,其主要由直线电机、直线导轨、直线位移传感器、DSP控制器等组成,从根本上改变了传统的调焦机械结构。具体给出了测量系统的组成结构和实验结果,并进行了精度影响因素分析,实验结果表明测量精度可保证在0.005mm内。
The focal system is an important part in zoom lens. The cam mechanism has been basically used in focal system now. The cam mechanism is bulky inefficient and low accuracy .The theory and methods for the zoom using beeline drive are discussed in the paper, and an applied system is also presented .The system was composed with liner motor, liner track, liner displacement sensor and digital signal processor etc. It drastically improved on traditional focal mechanism. The principle and structure of focal system are given in cletail. The system accuracy was also analyzed, the system accuracy was controlled in 0.005 millimeter.
出处
《长春理工大学学报（自然科学版）》
2007年第4期46-48,共3页
Journal of Changchun University of Science and Technology(Natural Science Edition)
基金
国防科技预研基金资助项目(1040603)
