| 高精度虹膜识别光学镜头的研制 |
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| 引用本文： | 刘雅丽,王敏,黄木旺. 高精度虹膜识别光学镜头的研制[J]. 应用光学, 2012, 33(3): 575-579 |
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| 作者姓名： | 刘雅丽 王敏 黄木旺 |
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| 作者单位： | 1.福建师范大学 物理与光电信息科技学院 福建省光子技术重点实验室,福建 福州 350007; |
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| 基金项目： | 福建省科技计划重点项目(2009H0020) |
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| 摘 要： | 针对虹膜识别系统中难于获取高分辨率的虹膜图像问题，设计一款高精度虹膜图像采集摄像镜头。镜头焦距14.2 mm, 畸变小于0.15%，像方数值孔径为0.26，像面直径为5.35 mm，工作距离130 mm，物像共轭距为150 mm。光学系统可获得高分辨率图像，在0.7视场光学传递函数MTF在120 lp/mm时大于30%。镜头由4片球面透镜构成，结构简单，适合产业化生产，各项光学指标检测结果达到设计要求。
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| 关 键 词： | 光学设计 高精度虹膜识别镜头 Zemax 图像采集 小畸变 |
| 收稿时间： | 2011-09-19 |
Iris identification optical lens with high precision |
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| LIU Ya-li , WANG Min , HUANG Mu-wang. Iris identification optical lens with high precision[J]. Journal of Applied Optics, 2012, 33(3): 575-579 |
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| Authors: | LIU Ya-li WANG Min HUANG Mu-wang |
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| Affiliation: | 1.School of Physics and Optoelectronics Technology,Fujian Normal University,Fuzhou 350007,China;2.Foctek Photonics,Inc. ,Fuzhou 350007,China |
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| Abstract: | To obtain high-resolution iris images in the iris recognition system, a high-precision iris image acquisition camera lens is designed, whose focal length is 14.2 mm, distortion is less than 0.15%, image space numerical aperture (NA) is 0.26, image diameter is 5.35 mm, working distance is 130 mm and object-image conjugate distance is 150 mm. This optical system can acquire high-resolution image with MTF > 0.3 at 120 lp/mm over 0.7 field of view. The camera lens is composed of 4 spherical lenses, which is simple and suitable for industrial production. All the optical performances of productions are consistent with the predicted results analyzed by Zemax. |
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| Keywords: | optical design high-precision iris identification lens Zemax image acquisition small distortion |
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