Iris acquiring optical system design with wavefront coding

被引：0
|
作者：
Zhang J.-Y. [1 ,2 ]
Huang Y.-Q. [2 ]
Xiong F.-B. [1 ]
机构：
[1] Institute of Optoelectronics and Communication Engineering, Xiamen University of Technology, Xiamen, 361024, Fujian
[2] School of Aerospace Engineering, Xiamen University, Xiamen, 361000, Fujian
来源：
Huang, Yuan-Qing (yuanqinghuang@xmu.edu.cn) | 1600年 / Chinese Optical Society卷 / 45期
关键词：
Biometric identification; Extended depth of field; Imaging system; Iris recognition; Wavefront Coding;
D O I：
10.3788/gzxb20164510.1022001
中图分类号：
学科分类号：
摘要：
An iris acquiring optical system with wavefront coding technique was designed, which can increase the depth of the field and get image at natural state without restriction. By applying the conventional imaging evaluation metric, Strehl ratio and encircled energy were used as the imaging features, and the wavefront coding system was design with ZEMAX, then a better trade-off between insensibility to defocus and restorability was obtained. The depths of focus of the system with cubic phase mask and modified cubic phase mask and the conventional system were compared. The result suggests the depth of focus of the iris acquiring system with cubic phase mask is the best which can attain by a factor of 8 over conventional iris acquiring system. The design increases the distance of the iris acquiring which has some reference value to the design of the iris image acquiring system at natural state. � 2016, Science Press. All right reserved.
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页数：7
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