Parallel two-step phase-shifting digital holography
Applied Optics, Vol. 47, Issue 19, pp. D183-D189 (2008)
http://dx.doi.org/10.1364/AO.47.00D183
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Abstract
We propose a parallel two-step phase-shifting digital holography technique capable of instantaneous measurement of three-dimensional objects, with a view toward measurement of dynamically moving objects. The technique is based on phase-shifting interferometry. The proposed technique carries out the two-step phase-shifting method at one time and can be optically implemented by using a phase-shifting array device located in the reference beam. The array device has a periodic two-step phase distribution, and its configuration is simplified compared with that required for three-step and four-step parallel phase-shifting digital holographies. Therefore the optical system of the proposed technique is more suitable for the realization of a parallel phase-shifting digital holography system. We conduct both a numerical simulation and a preliminary experiment in the proposed technique. The results of the simulation and the experiment agree well with those of sequential phase-shifting digital holography, and results are superior to those obtained by conventional digital holography using the Fresnel transform alone. Thus the effectiveness of the proposed technique is verified.
© 2008 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: October 1, 2007
Revised Manuscript: February 11, 2008
Manuscript Accepted: February 17, 2008
Published: April 25, 2008
Citation
Yasuhiro Awatsuji, Tatsuki Tahara, Atsushi Kaneko, Takamasa Koyama, Kenzo Nishio, Shogo Ura, Toshihiro Kubota, and Osamu Matoba, "Parallel two-step phase-shifting digital holography," Appl. Opt. 47, D183-D189 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-19-D183
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