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http://dx.doi.org/10.3807/COPP.2022.6.1.051

Rapid Calculation of CGH Using the Multiplication of Down-scaled CGH with Shifted Concave Lens Array Function  

Lee, Chang-Joo (School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University)
Lee, Seung-Yeol (School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University)
Publication Information
Current Optics and Photonics / v.6, no.1, 2022 , pp. 51-59 More about this Journal
Abstract
Holographic display technology is one of the promising 3D display technologies. However, the large amount of computation time required to generate computer-generated holograms (CGH) is a major obstacle to the commercialization of digital hologram. In various systems such as multi-depth head-up-displays with hologram contents, it is important to transmit hologram data in real time. In this paper, we propose a rapid CGH computation method by applying an arraying of a down-scaled hologram with the multiplication of a shifted concave lens function array. Compared to conventional angular spectrum method (ASM) calculation, we achieved about 39 times faster calculation speed for 3840 × 2160 pixel CGH calculation. Through the numerical investigation and experiments, we verified the degradation of reconstructed hologram image quality made by the proposed method is not so much compared to conventional ASM.
Keywords
Computer-generated holograms generation algorithm; Digital holography; Image processing;
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