采用树脂透镜的掌纹图像采集光学系统设计

袁春晓; 孙强

Volume 4 Issue 2

Apr. 2011

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Article Contents

Chinese Optics > 2011 > 4(2): 182-187.

YUAN Chun-xiao, SUN Qiang. Design of optical system based on resin lens for palmprint image sampling[J]. Chinese Optics, 2011, 4(2): 182-187.

Citation:

YUAN Chun-xiao, SUN Qiang. Design of optical system based on resin lens for palmprint image sampling[J]. Chinese Optics, 2011, 4(2): 182-187.

YUAN Chun-xiao, SUN Qiang. Design of optical system based on resin lens for palmprint image sampling[J]. Chinese Optics, 2011, 4(2): 182-187.

Citation:

YUAN Chun-xiao, SUN Qiang. Design of optical system based on resin lens for palmprint image sampling[J]. Chinese Optics, 2011, 4(2): 182-187.

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Design of optical system based on resin lens for palmprint image sampling

YUAN Chun-xiao^1,2,
SUN Qiang¹

1.
Opto-electronic Technology Center,Changchun Institute of Optics,Fine Mechanics and Physics, Chinese Academy of Sciences,Changchun 130033,China;
2.
Graduate University of Chinese Academy of Sciences,Beijing 100039,China

Received Date: 17 Sep 2010
Rev Recd Date: 23 Nov 2010
Publish Date: 25 Apr 2011

Abstract

Abstract

In order to acquire a palmprint sampling image with high resolution, high contrast and low distortion and to achieve system lightweight and high performance-to-price ratio, a double telecentric optical system with 6 resin lenses was designed based on the principle of total reflection. The weight of system has been reduced largely due to resin lenses; and the resolution of acquired image has been enhanced because of the optical design based on the total reflection. Furthermore, the selection of the double telecentric optical system ensures the correction of the trapezoidal distortion introduced by the tilt object surface. It is shown that the Modulation Transfer Function(MTF) of the palmprint image sampling system is higher than 0.55 at Nyquist frequency of 228 lp/mm, and the maximum distortion of the image is less than 0.14%. Moreover, the collection range of system is 120 mm160 mm within a palm, the actual resolution of palm can reach 500 dots per inch, and the image resolution is 8106 pixels. These results meet the requirements of palmprint image sampling with high-precision and low distortion.
- optical system design,
- palmprint image sampling,
- resin lens

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References

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