Tunable Micro Cat's Eye Array in an Optical Identification System and Comparison of Different 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

Volume

21

Issue

4

fYear

2015

fDate

July-Aug. 2015

Firstpage

130

Lastpage

136

Abstract

An optical identification (ID) system has been built, and dynamic ID tags are compared, which include a home-made tunable cat´s eye retroreflector array, a liquid crystal (LC) spatial light modulator (SLM) combined with a retroreflective tape, a LC SLM combined with a plane mirror, and a LC SLM combined with normal white paper. Performance comparisons indicate that the tag implemented with the microtunable cat´s eye retroreflector array offers the best system security. The image produced by the ID tag is also accurately recognized by the identification system.

Keywords

identification; liquid crystal devices; mirrors; optical arrays; optical tuning; retroreflectors; security; spatial light modulators; ID tags; LC SLM; SLM; liquid crystal spatial light modulator; microcat eye array tuning; optical identification system; plane mirror; retroreflector array; Arrays; Glass; Optical character recognition software; Optical filters; Optical imaging; Optical scattering; Security; Cat’s eye; Cat???s eye; optical ID tag; optical character recognition (OCR); optical character recognition (OCR).; optical identification; retroreflector array;

fLanguage

English

Journal_Title

Selected Topics in Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

1077-260X

Type

jour

DOI

10.1109/JSTQE.2014.2381513

Filename

6990483