An Advanced Logarithmic Phase Mask for Extending Depth of Field of Hybrid Optical Systems

Le Van Nhu, Phan Nguyen Nhue, Le Hoang Hai

Abstract


In this paper, an advanced logarithmic phase mask is proposed and its performance is investigated. The essential performance characteristics of phase masks are shown, including the defocused modulation transfer functions (MTF), integral area of the MTF, Hilbert space angle, non-axial Strehl ratio, and decoded images. The results have demonstrated that our phase mask is highly beneficial to extend the depth of field of hybrid optical systems. The advantages of the proposed phase mask in comparison to some other masks are also pointed out.

Keywords


extended depth of field, hybrid imaging system, phase mask, wavefront coding

References


E. R. Dowski, Jr. and W. T. Cathey, “Extended depth of field through wave-front coding”, Appl. Opt. 34, 1859-1866 (1995).

S. Yuan and C. Preza, “Point-spread function engineering to reduce the impact of spherical aberration on 3D computational fluorescence microscopy imaging” Opt. Express 19, 23298-23314 (2011).

S. Chen, Z. Fan, Z. Xu, B. Zuo, S. Wang, and H. Xiao, “Wavefront coding technique for controlling thermal defocus aberration in an infrared imaging system,”, Opt. Lett. 36, 3021-3023 (2011).

G. Muyo, A. Singh, M. Andersson, D. Huckridge, A. Wood, and A. R. Harvey, “Infrared imaging with a wavefront-coded singlet lens,” Opt. Express, 17, 21118-21123 (2009).

R. Narayanswamy, P. E. X. Silveira, H. Setty, V. P. Pauca, and J. v. d. Gracht, “Extended depth-of-field iris recognition system for a workstation environment,” Proc. SPIE 5779, 41-50 (2005).

D. S. Barwick, “Increasing the information acquisition volume in iris recognition systems,” Appl. Opt. 47, 4684-4691 (2008).

S. S. Sherif, E. R. Dowski, and W. T. Cathey, “A logarithmic phase filter to extend the depth of field of incoherent hybrid imaging systems”, Proc. SPIE. 4471, 272 -279 (2001).

H. Zhao and Y. Li, “Performance of an improved logarithmic phase mask with optimized parameters in a wavefront-coding system”, Appl. Opt. 49, 229-238 (2010).

H. Zhao and Y. Li, “Optimized logarithmic phase masks used to generate defocus invariant modulation transfer function for wavefront coding system”, Opt. Lett. 35, 2630 -2632 (2010).

H. Zhao, Q. Li and H. Feng, “Improved logarithmic phase mask to extend the depth of field of an incoherent imaging system”, Opt. Lett. 33, 1171-1173 (2008).

Q. Yang, L. Liu, and J. Sun, “Optimized phase pupil masks for extended depth of field”, Opt. Commun. 272, 56-66 (2007).

H. Zhao and Y. Li, “Optimized sinusoidal phase mask to extend the depth of field of an incoherent imaging system”, Opt. Lett. 35, 267-669 (2010).

J. Wang, J. Bu, M. Wang, Y. Yang and X. C. Yuan, “Improved sinusoidal phase plate to extend depth of field in incoherent hybrid imaging systems”, Opt. Lett. 37, 4534-4535 (2012).

N. Caron and Y. Sheng, “Polynomial phase mask for extending depth-of-field optimized by simulated annealing”, Proc. SPIE 6832, 68321G-1-10 (2007).

Le, Z. Fan, S. Chen, “Optimized asymmetrical tangent phase mask to obtain defocus invariant modulation transfer function in incoherent imaging system,” Opt. Lett. 39, 2171-2174 (2014).

F. Zhou, G. Li, H. Zhang, and D. Wang, “Rational phase mask to extend the depth of field in optical-digital hybrid imaging systems,” Opt. Lett. 34, 380-382 (2009).

Sauceda and J. Ojeda-Castañ eda, “High focal depth with fractional-power wave fronts”, Opt. Lett. 29, 560-562 (2004).

S. Chen, Z. Fan, H. Chang, and Z. Xu, “Nonaxial Strehl ratio of wavefront coding systems with a cubic phase mask,” Appl. Opt. 50, 3337-3345 (2011).


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Published by Vietnam Academy of Science and Technology