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Appl. Sci. 2018, 8(7), 1146; https://doi.org/10.3390/app8071146

Characterization of Spatial Light Modulator Based on the Phase in Fourier Domain of the Hologram and Its Applications in Coherent Imaging

1
School of Mathematics and Physics, Hebei University of Engineering, Handan 056038, China
2
School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
3
Faculty of Science, Kunming University of Science and Technology, Kunming 650500, China
4
Hebei Boxia Photoelectric Information Technology Co., Ltd., Handan 056000, China
*
Author to whom correspondence should be addressed.
Received: 1 June 2018 / Revised: 1 July 2018 / Accepted: 11 July 2018 / Published: 14 July 2018
(This article belongs to the Special Issue Holography, 3D Imaging and 3D Display)
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Abstract

Although digital holography is used widely at present, the information contained in the digital hologram is still underutilized. For example, the phase values of the Fourier spectra of the hologram are seldom used directly. In this paper, we take full advantage of them for characterizing the phase modulation of a spatial light modulator (SLM). Incident plane light beam is divided into two beams, one of which passes the SLM and interferes with the other one. If an image with a single grey scale loads on the SLM, theoretical analysis proves that the phase of the Fourier spectra of the obtained hologram contains the added phase and a constant part relative to the optical distance. By subtracting the phase for the image with the grey scale of 0 from that for the image with other grey scales, the phase modulation can be characterized. Simulative and experimental results validate that the method is effective. The SLM after characterization is successfully used for coherent imaging, which reconfirms that this method is exact in practice. When compared to the traditional method, the new method is much faster and more convenient. View Full-Text
Keywords: spatial light modulator; digital holography; phase modulation; Fourier spectra; fast characterization; coherent imaging spatial light modulator; digital holography; phase modulation; Fourier spectra; fast characterization; coherent imaging
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Wang, H.; Dong, Z.; Fan, F.; Feng, Y.; Lou, Y.; Jiang, X. Characterization of Spatial Light Modulator Based on the Phase in Fourier Domain of the Hologram and Its Applications in Coherent Imaging. Appl. Sci. 2018, 8, 1146.

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