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COMPUTER-GENERATED HOLOGRAMS

Holographic diffuser for diffuse infrared wireless home networking

[+] Author Affiliations
Jianping Yao

University of Ottawa, School of Information Technology and Engineering, Ottawa, Canada E-mail: jpyao@site.uottawa.ca

George C. K. Chen, Tuan-Kay Lim

Nanyang Technological University, School of Electrical and Electronic Engineering, Photonics Research Group, Nanyang Avenue, Singapore?639798

Opt. Eng. 42(2), 317-324 (Feb 01, 2003). doi:10.1117/1.1534592
History: Received May 16, 2002; Revised Jul. 31, 2002; Accepted Aug. 5, 2002; Online January 29, 2003
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We present the design and fabrication of holographic diffusers for diffuse IR wireless home networking. Three optimization methods—error reduction, input-output, and simulated annealing—are studied and used to calculate the computer-generated holograms, which are employed to fabricate the holographic diffusers. To evaluate the performance of the computer-generated holograms generated using these techniques, a cost function is defined and calculated for each hologram. The computer-generated hologram 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 computer-generated hologram onto a piece of quartz with a pixel size of 14×14μm using a laser writing system is achieved, and the diffraction pattern of the diffuser is demonstrated. © 2003 Society of Photo-Optical Instrumentation Engineers.

© 2003 Society of Photo-Optical Instrumentation Engineers

Citation

Jianping Yao ; George C. K. Chen and Tuan-Kay Lim
"Holographic diffuser for diffuse infrared wireless home networking", Opt. Eng. 42(2), 317-324 (Feb 01, 2003). ; http://dx.doi.org/10.1117/1.1534592


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