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http://dx.doi.org/10.3807/JOSK.2015.19.2.149

Iterative Fourier Transform Algorithm Based on the Segmentation of Target Image for a High-Speed Binary Spatial Light Modulator  

Im, Yeonsu (School of Electronics Engineering, Kyungpook National University)
Kim, Hwi (Department of Electronics and Information Engineering, College of Science and Technology, Korea University, Sejong Campus)
Hahn, Joonku (School of Electronics Engineering, Kyungpook National University)
Publication Information
Journal of the Optical Society of Korea / v.19, no.2, 2015 , pp. 149-153 More about this Journal
Abstract
A digital micro-mirror device (DMD) has the potential to modulate an incident wave with high speed, and the application for holographic display has been studied by many researchers. However, the quality of reconstructed image isn't good in comparison with that from a gray-scale amplitude-only hologram since it is a binary amplitude-only spatial light modulator (SLM). In this paper, we suggest a method generating a set of binary holograms to improve the quality of the reconstructed image. Here, we are concerned with the case for which the object plane is positioned at the Fourier domain of the plane of the SLM. In this case, any point in the Fourier plane is related to all points in the hologram. So there is a chance to generate a set of binary holograms illuminated by incident wave with constant optical power. Moreover, we find an interesting fact that the quality of reconstructed image is improved when the spatial frequency bandwidth of the binary hologram is limited. Therefore, we propose an iterative segmentation algorithm generating a set of binary holograms that are designed to be illuminated by the wave with constant optical power. The feasibility of our method is experimentally confirmed with a DMD.
Keywords
Digital holography; Spatial light modulators; Iterative Fourier transform algorithm;
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