变焦系统径向偏移对像点的影响分析
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摘要
针对变焦距系统在变焦过程中由于变焦组的径向偏移误差导致像面径向偏移的问题,利用ZEMAX光学设计软件中的坐标断点功能,模拟了变焦镜头在进行变焦过程中变焦组存在径向偏移误差时像面的径向偏移.结果表明:变焦系统像面径向跳动量与变焦系统变焦组径向偏移误差成正比,与变焦系统焦距成正比.变焦组径向偏移小于0.03mm,对系统成像质量影响较小;变焦组径向偏移0.05mm,系统调制传递函数(MTF)值低于0.3,系统像差值变大.
The research aims to solve the problem that the radial offset error of the zoom group will cause the radial shift of the image plane in the zooming process of the zoom system.The coordinate breakpoint function in the ZEMAX optical design software is used to simulate the radial shift of the image plane when the zoom lens has a radial offset error during zooming.From the simulation,it is found that the radial run-out of the image plane of the zoom system is directly proportional to both the radial offset error of the zoom group of the zoom system and the focal length of the zoom system.The radial offset of the zoom group which is less than 0.03 mm has little effect on the imaging quality of the system.When the radial offset of the zoom group is 0.05 mm and the system MTF value is less than0.3,the image quality of the zoom system will be influenced greatly.
The research aims to solve the problem that the radial offset error of the zoom group will cause the radial shift of the image plane in the zooming process of the zoom system.The coordinate breakpoint function in the ZEMAX optical design software is used to simulate the radial shift of the image plane when the zoom lens has a radial offset error during zooming.From the simulation,it is found that the radial run-out of the image plane of the zoom system is directly proportional to both the radial offset error of the zoom group of the zoom system and the focal length of the zoom system.The radial offset of the zoom group which is less than 0.03 mm has little effect on the imaging quality of the system.When the radial offset of the zoom group is 0.05 mm and the system MTF value is less than0.3,the image quality of the zoom system will be influenced greatly.
引文
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[2]安源,齐迎春.空间相机直线调焦机构的设计[J].光学精密工程,2009,17(3):609.AN Yuan,QI Yingchun.Design of Straight-line Focusing Mechanism for Space Camera[J].Optics and Precision Engineering,2009,17(3):609.(in Chinese)
[3]马迎军,张葆,洪永丰.连续变焦光学系统的像差自动设计[J].光学学报,2015,35(8):0822003-1.MA Yingjun,ZHANG Bao,HONG Yongfeng.Aberration Automatic Design of Continuous Zoom Optical System[J].Acta Optica Sinica,2015,35(8):0822003-1.(in Chinese)
[4]孟军和,张振,孙兴文.变焦距镜头的凸轮优化设计[J].红外与激光工程,2002,31(1):51.MENG Junhe,ZHANG Zhen,SUN Xingwen.Cam Optimization of a Zoom Lens[J].Infrared and Laser Engineering,2002,31(1):51.(in Chinese)
[5]LU W T,HUANG Y J,VODO P,et al.A New Mechanism for Negative Refraction and Focusing Using Selective Diffraction from Surface Corrugation[J].Optics Express,2007,15(15):9166.
[6]林为才,王晶.一种新型调焦机构设计[J].长春理工大学学报(自然科学版),2007,30(4):46.LIN Weicai,WANG Jing.A Design of New Focal System[J].Journal of Changchun University of Science and Technology(Natural Science Edition),2007,30(4):46.(in Chinese)
[7]潘文强,李湘宁,卢山,等.液体透镜变焦系统高斯理论分析[J].光学学报,2016,36(12):1222003-1.PAN Wenqiang,LI Xiangning,LU Shan,et al.Gauss Theoretical Analysis of Liquid Crystal Lens Zoom System[J].Acta Optica Sinica,2016,36(12):1222003-1.(in Chinese)
[8]杨明洋,杨洪涛,曲锐,等.80倍中波红外连续变焦光学系统设计[J].光子学报,2017,46(5):0522003-1.YANG Mingyang,YANG Hongtao,QU Rui,et al.Design of High Ratio Middle Infrared Continuous Zoom Optical System[J].Acta Photonica Sinica,2017,46(5):0522003-1.(in Chinese)
[9]李零印,王一凡.变焦系统误差分析[J].红外与激光工程,2012,41(5):1329.LI Lingyin,WANG Yifan.Error Analysis for Varifocal Optical System[J].Infrared and Laser Engineering,2012,41(5):1329.(in Chinese)
[10]聂真威,蔚素升,唐延甫.一种红外变焦距像面变化量的测量方法[J].红外,2014,35(12):14.NIE Zhenwei,WEI Susheng,TANG Yanfu.A Measurement Method of Variation of Image Plane for Infrared Zoom Imaging System[J].Infrared,2014,35(12):14.(in Chinese)