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《Electronics Optics & Control》 2012-05
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Study on Varifocal Mechanism Design for Infrared System

LI Yundong1, SUN Shuwang2 , HE Lei1(1.Luoyang Institute of Electro-optical Equipment,AVIC,Luoyang 471009,China; 2.Zhengzhou University,Zhengzhou 450052,China)  
Since infrared(IR) system has some advantages such as good image qualilty,high signal-to-noise ratio(SNR),strong anti-jamming ability and long distance detection,it has found a wide application in a lot of areas.When the IR system is used for target search and detection,there is an increasing demand for multiple FOVs or zoom lens optical system.One method is changing two or more lens's location in order to change focal length in optical system.Based on the mechanical design,the configuration,working mode and design of the several varifocal mechanisms are introduced in detail.The applicable range,advantages and disadvantages of them are given,which may supply a reference for engineering design of the infrared thermal imager.
【CateGory Index】: E933.41
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