一种10倍可见光连续变焦电视镜头设计
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摘要
为了满足电视跟踪中对目标探测识别的需求,设计了一种基于1/2英寸CCD的10倍可见光连续变焦电视镜头。该连续变焦电视镜头的焦距为40~400mm,F#为3.5,视场角为11.48°~1.15°。该系统采用负透镜组变倍和正透镜组补偿的方式实现连续变焦,系统的变焦曲线连续且平滑,图像在连续变焦过程中可一直保持清晰,短焦时可快速跟踪目标,长焦时可清晰识别大小为2m的物体,该电视镜头能够对12.5m~25km内的目标清晰成像,从而对其进行跟踪识别。系统连接变焦过程中成像质量较好,无拐点,满足电视跟踪系统的需求。
To meet the demands of detecting and identifying the target in TV tracking,a 10 ratio visible light continuous zoom TV lens based on 1/2inch CCD is designed.A result of lens with 40~400mm focal length,3.5Fnumber,11.48°~1.15°FOV is given.The concave lens group for variable magnification and the positive lens group for compensation are used.The cam curves of the zoom system are continuous and smooth and keep high resolution during zoom operation.The system could track the target quickly when in short focal length and the resolution arriving at long focal length could distinguish the objects of 2m.The system has long working distance from 12.5m~25km with high resolution,and then it can track and identify the target.The system has high image quality and no inflexion in continual focal variation process,and meets the requirements of TV tracking system.
To meet the demands of detecting and identifying the target in TV tracking,a 10 ratio visible light continuous zoom TV lens based on 1/2inch CCD is designed.A result of lens with 40~400mm focal length,3.5Fnumber,11.48°~1.15°FOV is given.The concave lens group for variable magnification and the positive lens group for compensation are used.The cam curves of the zoom system are continuous and smooth and keep high resolution during zoom operation.The system could track the target quickly when in short focal length and the resolution arriving at long focal length could distinguish the objects of 2m.The system has long working distance from 12.5m~25km with high resolution,and then it can track and identify the target.The system has high image quality and no inflexion in continual focal variation process,and meets the requirements of TV tracking system.
引文
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[8]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.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.
[9]范哲源,曹剑中,屈恩世,等.一种8倍可见光变焦光学系统设计[J].光子学报,2010,39(1):101-104.FAN Zhe-yuan,CAO Jian-zhong,QU En-shi,et al.Design of an 8times ratio visible zoom optical system[J].Acta Photonica Sinica,2010,39(1):101-104.
[2]Hyun Sook Kim,Chang Woo Kim,Seok Min Hong,et al.Compact mid-wavelength infrared zoom camera with 20∶1zoom range and automatic athermalization[J].Opt.Eng.,2002,41(7):1661-1667.
[3]李林,安连生.计算机辅助光学设计的理论与应用[M].北京:国防工业出版社,2002.
[4]胡际先.透雾连续变焦光学系统的设计[J].光学与光电技术,2007,5(4):61-64.HU Ji-xian.Design of penetrating continuous zoom optical system[J].Optics&Optoelectronic Technolgoy,2007,5(4):61-64.
[5]孙小玲.无热化电视导引头变焦光学系统设计研究[D].哈尔滨:哈尔滨工业大学,2012:16-40.SUN Xiao-ling.Research on design athermalisation of TV seeker zoom optical system[D].Harbin:Harbin Institute of Technology,2012:16-40.
[6]单娟.变焦距电视摄影物镜设计[D].西安:西安电子科技大学,2014:30-49.SHAN Juan.Design of zoom camera lens system[D].Xi’an:Xi’an University of Electronic Science and Technology,2014:30-49.
[7]王安科,徐宏斌,杨建峰,等.变焦距光学系统在电视制导中的应用[J].弹箭与制导学报,2010,30(6):41-43.WANG An-ke,XU Hong-bin,YANG Jian-feng,et al.Application of visible video zoom system in the television-guided system[J].Journal of Projectiles,Rockets,Missiles and Guidance,2010,30(6):41-43.
[8]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.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.
[9]范哲源,曹剑中,屈恩世,等.一种8倍可见光变焦光学系统设计[J].光子学报,2010,39(1):101-104.FAN Zhe-yuan,CAO Jian-zhong,QU En-shi,et al.Design of an 8times ratio visible zoom optical system[J].Acta Photonica Sinica,2010,39(1):101-104.