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Proceedings Paper

Phase shift error compensation method for digital holography using statistics of speckle field
Author(s): H. Kadono; M. Kataoka; V. D. Madjarova
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Paper Abstract

In Digital holography (DH), an in-line optical setup is commonly employed due to relatively low spatial resolution of CCD camera. In DH, a phase shifting method is commonly employed to determine the complex amplitude on the recording plane. In this study, we propose a phase shift error compensation method based on the statistics of the diffraction field of object. In most cases of the measurement using the digital holography, the object has an optically rough surface, and a fully developed speckle field is produced in the diffraction field, i.e., the recording plane. It is well known that the speckle phase takes a uniform probability density function (PDF). This statistical property is very stable and can be used as a constrain in the determination of actual phase shifts. The experiments were performed, and it was demonstrated that the phase shift error is well compensated over a fairly large amount of phase shift error. This method has a great advantage that any modification on ordinary digital holographic system with the phase shifting method is not required since the method utilizes information that was discarded in the conventional method.

Paper Details

Date Published: 13 September 2010
PDF: 7 pages
Proc. SPIE 7387, Speckle 2010: Optical Metrology, 738706 (13 September 2010); doi: 10.1117/12.871117
Show Author Affiliations
H. Kadono, Ctr. for Environmental Science in Saitama (Japan)
Saitama Univ. (Japan)
M. Kataoka, Saitama Univ. (Japan)
V. D. Madjarova, Saitama Univ. (Japan)


Published in SPIE Proceedings Vol. 7387:
Speckle 2010: Optical Metrology
Armando Albertazzi Goncalves; Guillermo H. Kaufmann, Editor(s)

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