Design and fabrication of holographic diffuser for diffuse infrared wireless home networking

Jianping Yao; Tiong Aik Koh; Oh Kian Tat; George C. K. Chen; Yee-Loy Lam; Tuan-Kay Lim

doi:10.1117/12.446605

29 October 2001 Design and fabrication of holographic diffuser for diffuse infrared wireless home networking

Jianping Yao, Tiong Aik Koh, Oh Kian Tat, George C. K. Chen, Yee-Loy Lam, Tuan-Kay Lim

Proceedings Volume 4595, Photonic Systems and Applications; (2001) https://doi.org/10.1117/12.446605
Event: International Symposium on Photonics and Applications, 2001, Singapore, Singapore

Abstract

This paper reports the design and fabrication of holographic diffusers for diffuse infrared wireless home networking. Three optimization methods -- error reduction, input-output and simulated annealing, are employed to calculate the computer- generated holograms (CGHs), which are used to fabricate the holographic diffusers. To evaluate the performance of the CGHs generated using the different techniques, a cost function is defined and calculated for each hologram. The CGH generated from the simulated annealing is found to have the best output compared to the other two techniques. The diffusers are verified by displaying them onto a spatial light modulator. The fabrication of the CGH onto a piece of quartz with a pixel size of 14 micrometers X 14 micrometers using a laser writing system is also achieved.

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Jianping Yao, Tiong Aik Koh, Oh Kian Tat, George C. K. Chen, Yee-Loy Lam, and Tuan-Kay Lim "Design and fabrication of holographic diffuser for diffuse infrared wireless home networking", Proc. SPIE 4595, Photonic Systems and Applications, (29 October 2001); https://doi.org/10.1117/12.446605

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KEYWORDS

Holograms

Computer generated holography

Diffusers

Algorithms

Holography

3D image reconstruction

Error analysis

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