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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 15 — Aug. 1, 2010
  • pp: 2630–2632

Optimized logarithmic phase masks used to generate defocus invariant modulation transfer function for wavefront coding system

Hui Zhao and Yingcai Li  »View Author Affiliations


Optics Letters, Vol. 35, Issue 15, pp. 2630-2632 (2010)
http://dx.doi.org/10.1364/OL.35.002630


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Abstract

In a previous Letter [ Opt. Lett. 33, 1171 (2008)], we proposed an improved logarithmic phase mask by making modifications to the original one designed by Sherif. However, further studies in another paper [ Appl. Opt. 49, 229 (2010)] show that even when the Sherif mask and the improved one are optimized, their corresponding defocused modulation transfer functions (MTFs) are still not stable with respect to focus errors. So, by further modifying their phase profiles, we design another two logarithmic phase masks that exhibit more stable defocused MTF. However, with the defocus-induced phase effect considered, we find that the performance of the two masks proposed in this Letter is better than the Sherif mask, but worse than our previously proposed phase mask, according to the Hilbert space angle.

© 2010 Optical Society of America

OCIS Codes
(110.0110) Imaging systems : Imaging systems
(110.1758) Imaging systems : Computational imaging

ToC Category:
Imaging Systems

History
Original Manuscript: February 26, 2010
Revised Manuscript: July 6, 2010
Manuscript Accepted: July 6, 2010
Published: July 29, 2010

Citation
Hui Zhao and Yingcai Li, "Optimized logarithmic phase masks used to generate defocus invariant modulation transfer function for wavefront coding system," Opt. Lett. 35, 2630-2632 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-15-2630

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