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One-eighth look-up table method for effectively generating computer-generated hologram patterns

Authors
Cho, SungjinJu, Byeong-KwonKim, Nam-YoungPark, Min-Chul
Issue Date
5월-2014
Publisher
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
Keywords
computer-generated hologram; holograms; parallel processing
Citation
OPTICAL ENGINEERING, v.53, no.5
Indexed
SCIE
SCOPUS
Journal Title
OPTICAL ENGINEERING
Volume
53
Number
5
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/98726
DOI
10.1117/1.OE.53.5.054108
ISSN
0091-3286
Abstract
To generate ideal digital holograms, a computer-generated hologram (CGH) has been regarded as a solution. However, it has an unavoidable problem in that the computational burden for generating CGH is very large. Recently, many studies have been conducted to investigate different solutions in order to reduce the computational complexity of CGH by using particular methods such as look-up tables (LUTs) and parallel processing. Each method has a positive effectiveness about reducing computational time for generating CGH. However, it appears to be difficult to apply both methods simultaneously because of heavy memory consumption of the LUT technique. Therefore, we proposed a one-eighth LUT method where the memory usage of the LUT is reduced, making it possible to simultaneously apply both of the fast computing methods for the computation of CGH. With the one-eighth LUT method, only one-eighth of the zone plates were stored in the LUT. All of the zone plates were accessed by indexing method. Through this method, we significantly reduced memory usage of LUT. Also, we confirmed the feasibility of reducing the computational time of the CGH by using general-purpose graphic processing units while reducing the memory usage. (C) 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
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Ju, Byeong kwon
공과대학 (전기전자공학부)
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