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http://dx.doi.org/10.5909/JBE.2020.25.6.836

Extremely High-Definition Computer Generated Hologram Calculation Algorithm with Concave Lens Function  

Lee, Chang-Joo (School of Electronic and Electrical Engineering, Kyungpook National University)
Choi, Woo-Young (School of Electronic and Electrical Engineering, Kyungpook National University)
Oh, Kwan-Jung (Electronics and Telecommunication Research Institute (ETRI))
Hong, Keehoon (Electronics and Telecommunication Research Institute (ETRI))
Choi, Kihong (Electronics and Telecommunication Research Institute (ETRI))
Cheon, Sang-Hoon (Electronics and Telecommunication Research Institute (ETRI))
Park, Joongki (Electronics and Telecommunication Research Institute (ETRI))
Lee, Seung-Yeol (School of Electronic and Electrical Engineering, Kyungpook National University)
Publication Information
Journal of Broadcast Engineering / v.25, no.6, 2020 , pp. 836-844 More about this Journal
Abstract
A very large number of pixels is required to generate a computer generated hologram (CGH) with a large-size and wide viewing angle equivalent to that of an analog hologram, which incurs a very large amount of computation. For this reason, a high-performance computing device and long computation time were required to generate high-definition CGH. To solve these problems, in this paper, we propose a technique for generating high-definition CGH by arraying the pre-calculated low-definition CGH and multiplying the appropriately-shifted concave lens function. Using the proposed technique, 0.1 Gigapixel CGH recorded by the point cloud method can be used to calculate 2.5 Gigapixels CGH at a very high speed, and the recorded hologram image was successfully reconstructed through the experiment.
Keywords
Digital Holography; Computer generated hologram; Fourier optics; Hologram algorithm; Optical imaging;
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