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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 21 — Oct. 12, 2009
  • pp: 19047–19054

Depth-extended integral imaging system based on a birefringence lens array providing polarization switchable focal lengths

Chan-Kyu Park, Sang-Shin Lee, and Yong-Seok Hwang  »View Author Affiliations


Optics Express, Vol. 17, Issue 21, pp. 19047-19054 (2009)
http://dx.doi.org/10.1364/OE.17.019047


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Abstract

An integral imaging system enabling extended depth of field was proposed and demonstrated based on a birefringence lens array (BLA) whose focal length was switched via the light polarization. The lens array system was constructed by combining two different liquid crystal(LC) embedded lens arrays, BLA I and II, which were fabricated by injecting a ZLI-4119 LC and an E-7 LC in between a lens array substrate and an ITO (indium-tin-oxide) glass plate respectively. The BLA I played a role as a convex lens only for the polarization parallel to the ordinary axis of the corresponding LC, but it serves as a plain medium for that along its extraordinary one since the refractive indexes of the lens and the LC are almost identical. Meanwhile, the BLA II played a role as a concave lens only for the polarization parallel to the extraordinary axis of the LC but as a plain medium for that along its ordinary one. As a result, the focal length could be switched via the polarization, and it was measured to be 680 mm and −29 mm. For the proposed system with the prepared BLAs, both real and virtual three-dimensional (3D) images were efficiently reconstructed at the positions of z=1300 mm and z=−30 mm with no significant degradation in the resolution, indicating its depth of field range.

© 2009 OSA

OCIS Codes
(080.0080) Geometric optics : Geometric optics
(080.2740) Geometric optics : Geometric optical design
(220.0220) Optical design and fabrication : Optical design and fabrication
(150.2945) Machine vision : Illumination design

History
Original Manuscript: August 7, 2009
Revised Manuscript: September 22, 2009
Manuscript Accepted: September 24, 2009
Published: October 7, 2009

Citation
Chan-Kyu Park, Sang-Shin Lee, and Yong-Seok Hwang, "Depth-extended integral imaging system based on a birefringence lens array providing polarization switchable focal lengths," Opt. Express 17, 19047-19054 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-21-19047


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