摘要
为满足当前安防市场对高性能变焦光学镜头在大范围监控和高清成像的需求,设计了一款焦距范围为10 mm~500 mm的平滑变焦光学系统。系统采用机械式正组补偿方式,通过参数设定与优化结合的方法计算出初始结构参数,采用移动光阑的方式保持恒定F数;引入非球面透镜,有效矫正系统的位置色差和轴向色差,提升了成像性能;整个系统由13个球面透镜和2个非球面透镜组成,总长为375.6 mm,调制传递函数(modulation transfer function,MTF)在104 lp/mm处全程均高于0.35;给出了变倍组与补偿组的运动曲线,曲线平滑无断点,验证了系统的可靠性与稳定性。最终分析结果表明:该系统能够满足大范围监控的实际需求,为大变倍比变焦光学系统的设计提供了参考。
To meet the growing demands for high-performance zoom optical lenses in large-area surveillance and high-definition imaging within the security market,a smooth zoom optical system with a focal length range of 10mm to 500 mm was designed.The system employed a mechanical positive compensation method,where optimal initial structural parameters were determined through parameter setting and optimization.A moving aperture was implemented to maintain a constant F-number throughout the zoom range.Additionally,aspherical lenses were introduced to effectively correct positional and axial chromatic aberrations,thereby enhancing imaging performance.The optical system consists of 13 spherical lenses and 2 aspherical lenses,with a total length of 375.6 mm.The modulation transfer function(MTF)remains above 0.35 at 104 lp/mm across the entire zoom range.During the design process,motion curves for the zoom and compensation groups were plotted,demonstrating smooth,breakpoint-free transitions,which could validate the system's reliability and stability.Final analysis results indicate that the proposed system meets the practical large-area surveillance requirements and provides valuable references for the design of high-zoom-ratio optical systems.
作者
詹硕
李博
ZHAN Shuo;LI Bo(School of Physics,Zhejiang University of Technology,Hangzhou 310023,China)
出处
《应用光学》
北大核心
2025年第5期966-973,共8页
Journal of Applied Optics
基金
浙江工业大学产学研项目“低功耗无线摄像机开发”(KYY-HX-20220057)。
关键词
光学设计
大变倍比
变焦系统
机械补偿变焦
凸轮曲线
optical design
high zoom ratio
zoom system
mechanical compensation zoom
cam curves
