小尺寸虹膜识别镜头的设计与性能分析  

Design and Performance Analysis of Small Size Iris Recognition Lens

作　　者：韦贵妹 张凯 夏雄平[1] Wei Guimei;Zhang Kai;Xia Xiongping(College of Science,Guilin University of Technology,Guilin 541004,Guangxi,China)

机构地区：[1]桂林理工大学理学院,广西桂林541004

出　　处：《激光与光电子学进展》2024年第17期308-314,共7页Laser & Optoelectronics Progress

摘　　要：基于人眼虹膜的天然防伪性,设计了一款微型的虹膜识别镜头并对其性能进行分析,该镜头由4片偶次非球面透镜组成,f数为1.8,全视场角为42°,光学系统总长2.5 mm,工作距离为184~389 mm。在可变工作距离范围内,所设计的镜头在1/2截止频率处各视场的调制传递函数(MTF)值均大于0.4,光学畸变小于0.6%,相对照度大于80%。所设计的镜头透镜材料采用光学塑料,具有体积较小、重量较轻、生产成本低、f数较小,以及成像质量优良等优势。该虹膜识别镜头可应用于手机等小型移动设备来实现高效的生物特征识别。This study designed and analyzed a miniaturized iris recognition lens by leveraging on the natural anticounterfeiting feature of the human iris.The lens comprises four even aspheric lenses,with an f-number of 1.8,a full field-of-view angle of 42°,a total length of 2.5 mm for the optical system,and working distance is 184-389 mm.Moreover,in the range of variable working distance,for the iris recognition lens,the modulation transfer function(MTF)values at a half-cutoff frequency for each field of view all exceed 0.4,the optical distortion is lower than 0.6%,and the relative illuminance is greater than 80%.The material of the designed lens is made of optical plastic,which has advantages of small volume,lightweight,low production cost,low f-number,and good imaging quality.Therefore,the designed iris recognition lens can be applied to efficient biometric recognition in small mobile devices,such as smartphones.

关 键 词：光学设计 虹膜识别 ZEMAX 非球面镜头 

分 类 号：O439[机械工程—光学工程]