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Design of a Long Distance Zoom Lens for Iris Recognition

  • Xiaoyu Lv
  • Wenzhe Liao
  • Kaijun Yi
  • Junxiong Gao
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 10996)

Abstract

This paper presents a zoom lens for iris recognition to solve the problem of narrow working range with fixed size of iris image. The lens with a wide and long working range and high resolution images with the same iris size in different work distance was designed. An 2.6× long distance zoom lens was designed which includes 35~91 mm focal length, work distance from 750 mm to 1910 mm, less than 0.5% distortion, 3.5 working F number, 9.5 mm image diameter, 780 nm~890 nm wavelength of operating spectrum. At 166 lp/mm, the lens can capture iris image over all field of view with MTF > 0.3.

Keywords

Zoom lens Iris recognition Wide and long working range 

References

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Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  • Xiaoyu Lv
    • 1
  • Wenzhe Liao
    • 1
  • Kaijun Yi
    • 1
  • Junxiong Gao
    • 1
  1. 1.Wuhan Hongshi Technologies Co., LTDWuhanChina

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