Open AccessSlim coherent backlight unit for holographic display using full color holographic optical elements
Author(s) -
Sun Il Kim,
Chil-Sung Choi,
Alexander Morozov,
Sergey Dubynin,
German Dubinin,
Jungkweun An,
Sunghoon Lee,
Young Kim,
Kanghee Won,
Hoon Song,
Hong-Seok Lee,
Soon Jung Hwang
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.026781
Subject(s) - backlight , optics , holography , holographic display , diffraction efficiency , materials science , wavelength , diffraction , reflection (computer programming) , physics , liquid crystal display , computer science , programming language
The coherent backlight unit (BLU) using a holographic optical element (HOE) for full-color flat-panel holographic display is proposed. The HOE BLU consists of two reflection type HOEs that change the optical beam path and shape by diffraction. The illumination area of backlight is 150 mm x 90 mm and the thickness is 10 mm, which is slim compared to other conventional coherent backlight units for holographic display systems. This backlight unit exhibits a total efficiency of 8.0% at red (660 nm), 7.7% at green (532 nm), and 3.2% at blue (460 nm) using optimized recording conditions for each wavelength. As a result, we could get a bright full color hologram image.