摘要
基于水下成像特点,设计了一款大景深水下广角镜头,并采用景深延拓技术,使得水下目标在目标距离3500 mm处保持清晰成像,同时大景深范围内的物体经光学系统成像后仍能保持清晰。其全视场角达90°,焦距为4.92 mm,光学系统总长控制在40 mm以内。该镜头采用5片标准球面镜片,相比传统7片式结构,显著降低了加工难度和制造成本。该镜头在全视场奈奎斯特频率83 lp/mm处,光学传递函数(Modulation Transfer Function,MTF)均优于0.5,中心视场成像质量接近衍射极限。公差分析及实验验证结果表明,该设计满足低成本量产与装调要求,具备良好的工程应用前景。
In this study,a large depth-of-field underwater wide-angle lens was designed based on the characteristics of underwater imaging.Depth-of-field extension technology was adopted to ensure clear imaging of underwater targets at a distance of 3500 mm,and objects within the extended depth-of-field range were clearly imaged by the optical system.The lens achieved a full field-of-view of 90°and focal length of 4.92 mm,with the total optical length controlled within 40 mm.It employed five standard spherical lenses,which significantly reduced the processing difficulty and manufacturing costs,which were thus lower than those of traditional seven-lens structures.At a full-field Nyquist frequency of 83 lp/mm,the modulation transfer function(MTF)of the optical system was better than 0.5,and the imaging quality at the central field-of-view was close to the diffraction limit.Tolerance analysis and experimental verification results demonstrated that the design satisfied the requirements for low-cost mass production and assembly,demonstrating strong potential for engineering applications.
作者
高举
王福涔
董海阔
杨宇杰
王家峥
李训牛
陈洁
余佳桐
刘珂
孙爱平
GAO Ju;WANG Fucen;DONG Haikuo;YANG Yujie;WANG Jiazheng;LI Xunniu;CHEN Jie;YU Jiatong;LIU Ke;SUN Aiping(Kunming Institute of Physics,Kunming 650223,China;Unit 31676 of the PLA Army,Changdu 854000,China)
出处
《红外技术》
北大核心
2026年第1期79-84,共6页
Infrared Technology
关键词
水下广角镜头
景深
景深延拓
underwater wide-angle lens
depth of field
extended depth of field
