Title :
Array of cat´s eye retro-reflectors with modulability for an optical identification system
Author :
Chao, Keng-Hsing ; Liao, Chun-Da ; Tsai, Jui-che
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
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.
Keywords :
liquid crystal devices; optical materials; polymer dispersed liquid crystals; retroreflectors; cat eye retroreflectors; high-security high-privacy identification system; modulability; optical identification system; polymer dispersed liquid crystal device; retroreflected light; smart film; Laser beams; Lenses; Optical device fabrication; Optical films; Optical imaging; Optical reflection; Retro-reflector; cat´s eye; optical ID;
Conference_Titel :
Optical MEMS and Nanophotonics (OPT MEMS), 2010 International Conference on
Conference_Location :
Sapporo
Print_ISBN :
978-1-4244-8926-8
Electronic_ISBN :
978-1-4244-8925-1
DOI :
10.1109/OMEMS.2010.5672210
