Performance evaluation of a zoom iris recognition system using Q-type aspherical design

Guimei Wei; Kai Zhang; Xiongping Xia; Xiongping Xia

doi:10.1364/AO.508040

Applied Optics
Vol. 63,
Issue 2,
pp. 390-395
(2024)
•https://doi.org/10.1364/AO.508040

Performance evaluation of a zoom iris recognition system using Q-type aspherical design

Guimei Wei, Kai Zhang, and Xiongping Xia

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Guimei Wei, Kai Zhang, and Xiongping Xia, "Performance evaluation of a zoom iris recognition system using Q-type aspherical design," Appl. Opt. 63, 390-395 (2024)

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Abstract

Based on a Q-type aspheric surface, a wide working distance zoom iris recognition lens is designed. The lens has an aperture of 2.0 and a working distance of 200–1200 mm. The design results show that the modulation transfer function values of each field at the cutoff frequency are greater than 0.3 and the optical distortion is less than 1.1%. With the same structure and parameters, the performance of two optical systems using Q-type aspherical and even power series aspherical are analyzed. The Q-type non-spherical aberration correction is better.

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Data availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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Image Quality Standard	Evaluation Value	Pixels Across the Iris Diameter	Conclusion
Poor	0–20	50–100	Unacceptable
Low	26–50	100–149	Marginal
Medium	51–75	150–199	Acceptable
High	76–100	200 or more	Good

Parameters	Typical Value
Optical format	1/2.7 in.
Active pixels	$1920 p i x e l \times 1080 p i x e l$
Pixel size	$3.0 µ m \times 3.0 µ m$

Parameters	Value
Wavelength/nm	800–900
Focus length/mm	10–60
$F$ -number	2.0
MTF/(lp/mm)	166
MTF of all fields (166 lp/mm)	$> 0.3$
Distortion/%	$< 1$
Relative illumination	$> 80 %$

Benign Rate	Even-Order Aspheric	$Q$ -Type Aspherical
90%	$> 0.3089$	$> 0.1766$
80%	$> 0.3378$	$> 0.1944$
50%	$> 0.395$	$> 0.2403$
20%	$> 0.4465$	$> 0.2925$
10%	$> 0.4693$	$> 0.3253$

Image Quality Standard	Evaluation Value	Pixels Across the Iris Diameter	Conclusion
Poor	0–20	50–100	Unacceptable
Low	26–50	100–149	Marginal
Medium	51–75	150–199	Acceptable
High	76–100	200 or more	Good

Abstract

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Applied Optics