1 inch actual size

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Chang-Won Shin, Hui-Ying Wu, Ki-Chul Kwon, Yan-Ling Piao, Kwon-Yeon Lee, Sang-Keun Gil, and Nam Kim Opt. Express 29(2) 1175-1187 (2021)

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A compact wavelength multiplexing technique is proposed and experimentally investigated to improve the efficiency of a full-color holographic diffuser using photopolymer. The exposure responses of a monochromatic hologram and a three wavelength multiplexed hologram recorded in photopolymer film are presented. The time-scheduled exposure energies at wavelengths of 633, 532, and 473 nm were chosen to optimize the uniform diffraction efficiency of the wavelength multiplexed hologram. These three wavelength iterative sequences of exposures are applied to achieve a specific color balance for a multicolor holographic diffuser. The experimental results confirm that the fabrication method is well suited to the manufacture of holographic diffusers for full-color display applications.

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1School of Electrical Engineering and Computer Science, Chungbuk National University, 1 Chungdae-ro, Seowon-Gu, Cheongju, Chungbuk 362-763, South Korea

Long He, Xiangqian Chen, Yuhua Yang, Xiangzhong Liu, Yuantong Chen, Lixin Xu, and Chun Gu Opt. Express 31(18) 29843-29858 (2023)

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3Department of Electrical Engineering, Suncheon National University, 255 Jungang-ro, Suncheon, Jeollanam-do 540-950, South Korea

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2Digital Holography Research Team, Korea Electronics Technology Institute, 11 World Cup buk-ro 54-gil, Mapo-Gu, Seoul 121-835, South Korea

A compact wavelength multiplexing technique is proposed and experimentally investigated to improve the efficiency of a full-color holographic diffuser using photopolymer. The exposure responses of a monochromatic hologram and a three wavelength multiplexed hologram recorded in photopolymer film are presented. The time-scheduled exposure energies at wavelengths of 633, 532, and 473 nm were chosen to optimize the uniform diffraction efficiency of the wavelength multiplexed hologram. These three wavelength iterative sequences of exposures are applied to achieve a specific color balance for a multicolor holographic diffuser. The experimental results confirm that the fabrication method is well suited to the manufacture of holographic diffusers for full-color display applications.

Changwon Jang, Chang-Kun Lee, Jinsoo Jeong, Gang Li, Seungjae Lee, Jiwoon Yeom, Keehoon Hong, and Byoungho Lee Appl. Opt. 55(3) A71-A85 (2016)