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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 34 — Dec. 1, 2009
  • pp: H160–H167

Parallel optical-path-length-shifting digital holography

Yasuhiro Awatsuji, Takamasa Koyama, Tatsuki Tahara, Kenichi Ito, Yuki Shimozato, Atsushi Kaneko, Kenzo Nishio, Shogo Ura, Toshihiro Kubota, and Osamu Matoba  »View Author Affiliations


Applied Optics, Vol. 48, Issue 34, pp. H160-H167 (2009)
http://dx.doi.org/10.1364/AO.48.00H160


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Abstract

The authors propose an optical-path-length-shifting digital holography as a technique capable of single-shot recording of three-dimensional information of objects. With a single image sensor, the proposed technique can simultaneously record all of the holograms required for the in-line digital holography that reconstruct the image of an object from two intensity measurements at different planes. The technique can be optically implemented by using an optical-path-length-shifting array device located in the common path of the reference and object waves. The array device has periodic structure of two-step optical-path difference. The configuration of the array device of the proposed technique is simpler than the phase-shifting array device required for parallel phase-shifting digital holographies. Therefore, the optical system of the proposed technique is more suitable for the realization of a single-shot in-line digital holography system that removes the conjugate image from the reconstructed image. The authors conducted both a numerical simulation and a preliminary experiment of the proposed technique. The reconstructed images were quantitatively evaluated by using root mean squared error. In comparison to single-shot digital holography using the Fresnel transform alone, with the proposed technique the root mean squared errors of the technique were reduced to less than 1 / 6 in amplitude and 1 / 3 in phase. Also the results of the simulation and experiment agreed well with the images of an object. Thus the effectiveness of the proposed technique is verified.

© 2009 Optical Society of America

OCIS Codes
(090.0090) Holography : Holography
(090.1760) Holography : Computer holography
(090.2880) Holography : Holographic interferometry
(100.3010) Image processing : Image reconstruction techniques
(090.1995) Holography : Digital holography

History
Original Manuscript: July 1, 2009
Revised Manuscript: September 29, 2009
Manuscript Accepted: October 23, 2009
Published: November 4, 2009

Citation
Yasuhiro Awatsuji, Takamasa Koyama, Tatsuki Tahara, Kenichi Ito, Yuki Shimozato, Atsushi Kaneko, Kenzo Nishio, Shogo Ura, Toshihiro Kubota, and Osamu Matoba, "Parallel optical-path-length-shifting digital holography," Appl. Opt. 48, H160-H167 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-34-H160

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