减小变焦系统凸轮曲线压力角的方法
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摘要
为了使机械补偿的连续变焦光学系统可以连续、平稳地成像,提出了一种减小变焦系统凸轮曲线压力角的方法.改变变倍曲线方程,运用动态光学原理,拟合的补偿曲线的压力角有明显减小趋势.原始设计变倍曲线的压力角为31.4°,补偿曲线的最大压力角大于50°.运用插值法改变变倍组方程,得到的变倍曲线的最大压力角小于37°,补偿曲线的最大压力角小于23°,得到的新的凸轮曲线满足曲线压力角小于45°的要求.实际光学系统检测的结果证明了这种方法的可行性.该方法可以有效地减小凸轮曲线的压力角,实际变焦系统能够连续清晰地成像.
In the design of continuous zoom optical system with mechanical compensation,in order to make the zoom system image continuously and smoothly,this paper proposes a method to reduce the cam curve pressure angle of the zoom system.By changing the equation of the zoom curve and applying the principle of dynamic optics,the pressure angle of the fitted compensation curve has a significant decreasing trend.In the original design,the pressure of the zoom curve is 31.4°,and the maximum pressure angle of the compensation curve is greater than 50°.Using the interpolation method to change the equation of the variable magnification group to obtain a new cam curve,the maximum pressure angle of the zoom curve is less than 37°and the maximum pressure angle of the compensation curve is less than23°.A new cam curve is obtained that satisfies the requirement that the curve pressure angle is less than45°.The results of the actual optical system test prove the feasibility of this method.By this method,the pressure angle of the cam curve can be reduced,the actual zoom system can image continuously and clearly.
In the design of continuous zoom optical system with mechanical compensation,in order to make the zoom system image continuously and smoothly,this paper proposes a method to reduce the cam curve pressure angle of the zoom system.By changing the equation of the zoom curve and applying the principle of dynamic optics,the pressure angle of the fitted compensation curve has a significant decreasing trend.In the original design,the pressure of the zoom curve is 31.4°,and the maximum pressure angle of the compensation curve is greater than 50°.Using the interpolation method to change the equation of the variable magnification group to obtain a new cam curve,the maximum pressure angle of the zoom curve is less than 37°and the maximum pressure angle of the compensation curve is less than23°.A new cam curve is obtained that satisfies the requirement that the curve pressure angle is less than45°.The results of the actual optical system test prove the feasibility of this method.By this method,the pressure angle of the cam curve can be reduced,the actual zoom system can image continuously and clearly.
引文
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[3]JIANG Lun,HUANG Wei.Design of long focal length large zoom ratio MWIR zoom optical system[J].Infranred and LaserEngineering,2012,41(7):1867-1871.江伦,黄玮.长焦距大变倍比中波红外变焦距系统设计[J].红外与激光工程,2012,41(7):1867-1871.
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[6]HE Lin-lin,QIU Li-chao,ZHANG Bo,et al.Optimization of modeling and machining method of cam slot in the continuous zooming system[J].Machine Tool&Hydraulics,2017,45(8):32-33+145.何林林,邱立超,张博,等.连续变焦系统凸轮槽建模及加工方法优化[J].机床与液压,2017,45(8):32-33+145.
[7]GAO Zi-ying,LIU Zhi-ying.Structure design of IR zoom system[J].Journal of Changchun University of Science and Technology(Natural,Science Edition),2015,38(5):30-33.高子英,刘智颖.红外变焦系统结构设计[J].长春理工大学学报(自然科学版),2015,38(5):30-33.
[8]GAO Tian-yuan,HOU Zhen-yan.Comparison and research of zoom curve fitting methods[J].Acta Photonica Sinica,2013,42(1):94-97.高天元,侯振岩.变焦曲线拟合方法的比较与研究[J].光子学报,2013,42(1):94-97.
[9]WANG Chun-yan,WANG Zhi-jian,ZHOU Qing-cai.Solving the cam curve of the compensating group using dynamic optical theory[J].Acta Optica Sinca,2006,26(6):891-894.王春艳,王志坚,周庆才.应用动态光学理论求解变焦光学系统补偿组凸轮曲线[J].光学学报,2006,26(6):891-894.
[10]CHEN Wei-ning,YANG Hong-tao,LIU Wei,et al.Optimization design method of cam curve for zoom lens[J].Infranred and Laser Engineering,2014,43(5):1535-1539.陈卫宁,杨洪涛,刘伟,等.变焦凸轮曲线的优化设计方法[J].红外与激光工程,2014,43(5):1535-1539.
[2]WANG Ping,ZHANG Bao,CHEN Zhi-feng,et al.Optimal design of cam structure of zoom lens[J].Optics and Precision Engineering,2010,18(4):893-898.王平,张葆,程志峰,等.变焦距镜头凸轮结构优化设计[J].光学精密工程,2010,18(4):893-898.
[3]JIANG Lun,HUANG Wei.Design of long focal length large zoom ratio MWIR zoom optical system[J].Infranred and LaserEngineering,2012,41(7):1867-1871.江伦,黄玮.长焦距大变倍比中波红外变焦距系统设计[J].红外与激光工程,2012,41(7):1867-1871.
[4]TIAN Hai-xia,YANG Jian-feng,MA Xiao-long.Design for visible video zoom optical system[J].Acta Photonica Sinica,2008,37(9):1797-1799.田海霞,杨建峰,马小龙.可见光变焦距电视光学系统设计[J].光子学报,2008,37(9):1797-1799.
[5]CHEN Xin,FU Yue-gang.Optimal design of cam curve for zoom system[J].Journal of Applied Optics,2008,29(1):45-47.陈鑫,付跃刚.变焦系统凸轮曲线的优化设计[J].应用光学,2008,29(1):45-47.
[6]HE Lin-lin,QIU Li-chao,ZHANG Bo,et al.Optimization of modeling and machining method of cam slot in the continuous zooming system[J].Machine Tool&Hydraulics,2017,45(8):32-33+145.何林林,邱立超,张博,等.连续变焦系统凸轮槽建模及加工方法优化[J].机床与液压,2017,45(8):32-33+145.
[7]GAO Zi-ying,LIU Zhi-ying.Structure design of IR zoom system[J].Journal of Changchun University of Science and Technology(Natural,Science Edition),2015,38(5):30-33.高子英,刘智颖.红外变焦系统结构设计[J].长春理工大学学报(自然科学版),2015,38(5):30-33.
[8]GAO Tian-yuan,HOU Zhen-yan.Comparison and research of zoom curve fitting methods[J].Acta Photonica Sinica,2013,42(1):94-97.高天元,侯振岩.变焦曲线拟合方法的比较与研究[J].光子学报,2013,42(1):94-97.
[9]WANG Chun-yan,WANG Zhi-jian,ZHOU Qing-cai.Solving the cam curve of the compensating group using dynamic optical theory[J].Acta Optica Sinca,2006,26(6):891-894.王春艳,王志坚,周庆才.应用动态光学理论求解变焦光学系统补偿组凸轮曲线[J].光学学报,2006,26(6):891-894.
[10]CHEN Wei-ning,YANG Hong-tao,LIU Wei,et al.Optimization design method of cam curve for zoom lens[J].Infranred and Laser Engineering,2014,43(5):1535-1539.陈卫宁,杨洪涛,刘伟,等.变焦凸轮曲线的优化设计方法[J].红外与激光工程,2014,43(5):1535-1539.