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Array of cat's eye retro-reflectors with modulability for an optical identification system

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3 Author(s)
Keng-hsing Chao ; Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan ; Chun-da Liao ; Jui-che Tsai

In this paper, we present an array of cat's eye retro-reflectors with modulability for an optical identification (ID) system. The modulability is obtained through the use of a smart film, a polymer dispersed liquid crystal device (PDLC). Switching of the image pattern of retro-reflected light is demonstrated. Such a dynamic image can function as the "key" so that a high-security, high-privacy identification system can be constructed.

Published in:

Optical MEMS and Nanophotonics (OPT MEMS), 2010 International Conference on

Date of Conference:

9-12 Aug. 2010