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Proceedings Paper

Diffuse hologram for indoor infrared wireless communication
Author(s): George C. K. Chen; Jianping Yao; Wong Ee Yin; Koh Siew Ying
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Paper Abstract

A diffuse hologram was designed, fabricated and tested. The application of this hologram is to create a uniform light distribution environment so that shadowing problem encountered in infrared-red communication could be overcome. Our hologram is a binary-phase level with an array of pixel of 256 x 256 and was computer generated. The hologram was fabricated using both the direct laser writer and electron beam writer technique, and followed by reactive ion etching on quartz substrate. The feature size of the holograms is ~11 mm and ~2 mm for the direct laser writer and e-beam lithography respectively. To evaluate the hologram, it was reconstructed in a dark room of size 4.6m x 3.6m x 2.61m and light distribution across the room was measured.

Paper Details

Date Published: 9 September 2002
PDF: 10 pages
Proc. SPIE 4910, Optical Networking II, (9 September 2002); doi: 10.1117/12.482457
Show Author Affiliations
George C. K. Chen, Nanyang Technological Univ. (Singapore)
Jianping Yao, Univ. of Ottawa (Canada)
Wong Ee Yin, Nanyang Technological Univ. (Singapore)
Koh Siew Ying, Nanyang Technological Univ. (Singapore)

Published in SPIE Proceedings Vol. 4910:
Optical Networking II
Shizhong Xie; Chunming Qiao; Yun Chur Chung, Editor(s)

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