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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 12 — Jun. 11, 2007
  • pp: 7202–7210

Extended depth of focus imaging with birefringent plate

Zeev Zalevsky and Shai Ben-Yaish  »View Author Affiliations

Optics Express, Vol. 15, Issue 12, pp. 7202-7210 (2007)

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In this paper we present a simple approach to obtain extended depth of field for any optical imaging system just by adding a birefringent plate between the lens and the detector. The width of the plate is properly designed such that one polarization state contains in-focus near field information while the other polarization state contains in-focus far field details. Both images are superimposed one on top of the other and thus an all-optical spatially sharp imaging is obtained containing both fields. The width of the plate is also designed such that there is a longitudinal overlapping of the two regions (the near and the far) such that continuously well focused imaging is generated. The presented approach for extending the depth of focus is significantly simple compared to the use of birefringent and bi-focal lenses published recently. Preliminary numerical as well as experimental results verify the proposed approach.

© 2007 Optical Society of America

OCIS Codes
(100.6640) Image processing : Superresolution
(110.4190) Imaging systems : Multiple imaging
(260.1440) Physical optics : Birefringence

ToC Category:
Imaging Systems

Original Manuscript: February 1, 2007
Revised Manuscript: March 31, 2007
Manuscript Accepted: April 2, 2007
Published: May 29, 2007

Zeev Zalevsky and Shai Ben-Yaish, "Extended depth of focus imaging with birefringent plate," Opt. Express 15, 7202-7210 (2007)

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