Identification device

Jian Shian Lin, Chih Chieh Su, Ta Hsin Chou, Mount Learn Wu, Chieh Lung Lai, Che Lung Hsu, Hsiao Chin Lan, Hung I. Huang, Yung Chih Liu, Zong Ru Tu, Chien Chieh Lee, Jenq Yang Chang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


In this Letter, the identification device disclosed in the present invention is comprised of: a carrier and a plurality of pseudo-pixels; wherein each of the plural pseudo-pixels is formed on the carrier and is further comprised of at least a light grating composed of a plurality of light grids. In a preferred aspect, each of the plural light grids is formed on the carrier while spacing from each other by an interval ranged between 50nm and 900nm. As the aforesaid identification device can present specific colors and patterns while it is being viewed by naked eye with respect to a specific viewing angle, the identification device is preferred for security and anti-counterfeit applications since the specific colors and patterns will become invisible when it is viewed while deviating from the specific viewing angle.

Original languageEnglish
Title of host publicationOptoelectronic Devices
Subtitle of host publicationPhysics, Fabrication, and Application IV
StatePublished - 2007
EventOptoelectronic Devices: Physics, Fabrication, and Application IV - Boston, MA, United States
Duration: 11 Sep 200711 Sep 2007

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


ConferenceOptoelectronic Devices: Physics, Fabrication, and Application IV
Country/TerritoryUnited States
CityBoston, MA


  • Diffraction grating
  • Guided-mode resonance
  • Planar waveguide


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