一种大口径高精度凸轮变焦机构的设计  

Design of heavy calibre and high precision cam-varifocal mechanism

作　　者：王一凡[1] 薛育[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《光学精密工程》2007年第11期1756-1759,共4页Optics and Precision Engineering

基　　金：国家自然科学基金资助项目(No.60574089)

摘　　要：通过对大口径凸轮变焦机构的分析,找出了影响该机构精度的原因。在原机构的基础上,加装了滑动的密珠轴系,解决了该凸轮变焦距系统变焦过程中光轴跳动量大的问题。通过机构的装调和检测,可将变焦过程中光轴的跳动量控制在0.01 mm以内,满足了测量系统的精度要求。结果表明,通过加装滑动的密珠轴系的方法,完善了大口径高精度凸轮变焦机构的设计。After analyzing the structure and finding the influence factors on the system precision,a slidable ball set of axis is added on the varifocal mechanism to solve the problem of bigger variation of optic axis in heavy calibre cam-varifocal system. By adjusting and measuring the structure, this method can control the variation of optic axis into 0. 01 mm to meet the precision requirement in measurement system. The results show that the design of a heavy calibre and high precision cam-varifocal mechanism has been improved by the method of adding the sliable ball set of axis.

关 键 词：变焦距系统 变焦 凸轮 光轴跳动量 

分 类 号：V556.5[航空宇航科学与技术—人机与环境工程] TH703[机械工程—仪器科学与技术]