Title :
Characterization of a micro tunable cat´s eye array in an optical identification system and comparison between different types of ID tags
Author :
Chih-Chieh Chang ; Yu-Cheng Yang ; Ming-Chun Su ; Jui-che Tsai
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
We have built an optical identification system, and tried different types of dynamic ID tags, including a tunable cat´s eye retroreflector array, a liquid crystal (LC) spatial light modulator (SPM) with retroreflective tape, and a LC SPM with normal white paper. Their performance is compared and the tag implemented with the micro tunable cat´s eye retroreflector array offers the best system security.
Keywords :
eye; identification; liquid crystal devices; optical arrays; paper; retroreflectors; spatial light modulators; dynamic ID tags; liquid crystal spatial light modulator; microtunable cat´s eye array; normal white paper; optical identification system; retroreflective tape; tunable cat´s eye retroreflector array; Arrays; Cameras; Glass; Optical filters; Optical modulation; Optical scattering; Security;
Conference_Titel :
Optical MEMS and Nanophotonics (OMN), 2014 International Conference on
Conference_Location :
Glasgow
Print_ISBN :
978-0-9928-4140-9
DOI :
10.1109/OMN.2014.6924565
