激光与光电子学进展, 2018, 55 (9): 092201, 网络出版: 2018-09-08   

指纹静脉多模识别光学系统的设计 下载: 689次

Design of Optical System for Multimode Recognition Based on Fingerprints and Veins
叶文炜 1,2何丽鹏 1,2林峰 1,2
作者单位
1 福建师范大学光电与信息工程学院福建省光子技术重点实验室, 福建 福州 350007
2 福建师范大学光电与信息工程学院医学光电科学与技术教育部重点实验室, 福建 福州 350007
摘要
设计了一款可同时提取人体指纹及静脉图像的红外与可见光共焦光学系统。该系统由10片球面透镜组成, 系统焦距为10 mm, 视场角为34°, F数为2.4。为减小仪器体积, 系统的共轭距控制在120 mm以内。利用ZEMAX软件对系统进行了优化, 结果表明, 不同波长的光线严格成像于同一像面; 在系统要求的空间频率164 lp/mm处, 调制传递函数值大于0.4; 所有视场弥散斑的大小均小于成像器件的最小像元尺寸, 畸变小于1%。系统公差分析表明, 该设计符合生产制造要求。
Abstract
An infrared-visible confocal optical system for simultaneous extraction of human fingerprint and finger vein images is designed, which consists of ten spherical lenses with system focal length of 10 mm, total field of view of 34° and F number of 2.4. In order to reduce the instrument volume, the conjugate distance of this system is controlled within 120 mm. After optimization by the ZEMAX software, the design results show that the lights with different wavelengths strictly image on the same image plane. The value of modulation transfer function at a spatial frequency of 164 lp/mm required by this system is greater than 0.4. The sizes for all defocused spots in view field are smaller than the smallest pixel size of the image device and the distortion is less than 1%. The tolerance analysis of the system shows that this design meets the manufacturing requirements.
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叶文炜, 何丽鹏, 林峰. 指纹静脉多模识别光学系统的设计[J]. 激光与光电子学进展, 2018, 55(9): 092201. Ye Wenwei, He Lipeng, Lin Feng. Design of Optical System for Multimode Recognition Based on Fingerprints and Veins[J]. Laser & Optoelectronics Progress, 2018, 55(9): 092201.

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