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Proceedings Paper

Directional light-guide devices with continuously variable spatial frequency sub-micron grating structures for autostereoscopic display applications
Author(s): Wenqiang Wan; Linsen Chen; Yimin Lou; Su Shen; Yan Ye; Xiaoxuan Dong; Wenbin Huang; Minghui Luo
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Paper Abstract

Autostereoscopic displays are a promising three dimensional display technology for its convenience and compatibility with current display systems which has attracted considerable attention. We describe in detail an autostereoscopic display system with full-parallax using a directional light-guide device with continuously variable spatial frequency sub-micron grating structures. The optimization process of parameters of the multi-direction light-guide is given. A method of implementing sub-micron grating pixels (SMGPs) based on an ultraviolet continuously variable spatial frequency photolithography process has been proposed. The process aims to provide low cost fabrication of variable spatial frequency grating pixels with high efficiency. We fabricate 2 inch backlight plate with nine viewing directions, and the pitch of each diffractive pixel varies between 441 nm and 578 nm. The properties of SMGPs are investigated by the measurement of diffraction efficiency dependence on viewing angle under a collimated 650 nm LED light source at an incidence angle of 60°. The variation of diffraction efficiency with regards to viewing angle is weak. The measured diffraction efficiency is around 6%, which is in good agreement with the simulated value.

Paper Details

Date Published: 11 November 2014
PDF: 6 pages
Proc. SPIE 9271, Holography, Diffractive Optics, and Applications VI, 927126 (11 November 2014); doi: 10.1117/12.2071328
Show Author Affiliations
Wenqiang Wan, Soochow Univ. (China)
Linsen Chen, Soochow Univ. (China)
Yimin Lou, Soochow Univ. (China)
Su Shen, Soochow Univ. (China)
Yan Ye, Soochow Univ. (China)
Xiaoxuan Dong, Soochow Univ. (China)
Wenbin Huang, Soochow Univ. (China)
Minghui Luo, Soochow Univ. (China)

Published in SPIE Proceedings Vol. 9271:
Holography, Diffractive Optics, and Applications VI
Yunlong Sheng; Chongxiu Yu; Changhe Zhou, Editor(s)

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