Color Changing Fibers

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Colored and wearable photonics textile for textile applications

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Color Changing Fibers

  1. 1. Color Changing Fibers Presented by Thomas Martinuzzo Project Leader, Sciences and Engineering thomas.martinuzzo@univalor.ca
  2. 2. Overview Color Changing Ph C l Ch i Photonics Fib f T il A li i i Fibers for Textile Applications Seeking Partnerships in Development and Market Deployment in Development and Market Market : 391.7 millions by 2012 (CAGR, 2007‐2012: 37.9 %) Inventor: Pr. Maksim Skorobogatiy, École Polytechnique de  Montreal Mtl Intellectual Property: US Provisional Patent Application  Intellectual Property: US Provisional Patent Application (61/136,155)+ 1 new USPR underway on improvements
  3. 3. Conventional optical fibers a Re Cap Conventional optical fibers a Re‐Cap Very efficient guiding in the fiber core, almost no core light escapes sideways http://en.wikipedia.org/wiki/Optical_Fiber
  4. 4. Implementing colors  in woven optical fibers Technological Problems Emission control with geometry is complicated, especially when the weft is used as a light-guide. light guide To ensure uniformity of light emission for the textiles based on bent fibers, textile geometry has fibers to remain constant during wear. SCRATCHED SURFACE The basic alternative is to scratch the fiber surface t increase the light leakage. f to i th li ht l k Any notch or scratch may be too coarse; fiber can loose the whole light power at a single or a few points.
  5. 5. Implementing colors  in woven optical fibers Technological Problems Necessity of having 3 different LED color types (RGB), hence high energy consumption, coupling complexity and space constraints, stability of an emitted color over time coupler RGB Fiber
  6. 6. Need better textiles and more  complex functionalities??? complex functionalities??? Go Photonic Crystal Fibers ! Go Photonic Crystal Fibers ! Use of a single white light source for color applications Color on demand fibers Color on demand fibers Color changing passive fibers On demand fiber luminosity by geometry design • Go Photonic Crystal Fibers
  7. 7. Color on demand by fiber design Color on demand by fiber design coupler l RGB Fiber Fiber Geometry Design
  8. 8. Fusion of RGB colors for color on  demand textiles demand textiles Fiber Fiber Fiber RGB yarns
  9. 9. Light extraction without mechanical  deformations Photonic Crystal Fibers  confine light in a hollow or a low refractive index core by using periodic dielectric “mirror”  region which also acts as a spectral filter 
  10. 10. Dielectric multilayer “mirrors” have  different colors when looked at  different colors when looked at different angles Fiber guiding regime Outside reflection regime
  11. 11. How to make fibers to change their  color
  12. 12. Color changing textiles  (passive technology) Reflected light Passive color  changing textiles + = Fiber Guided light Fiber Reflected light e ected g t Guided light Guided light Fiber
  13. 13. Possible Applications Possible Applications • Variable Colored Uniforms for enhanced  visibility in daytime visibility in daytime • Variable Color signs for enhanced visibility in  nighttime • Anti‐counterfeit labels Anti counterfeit labels • Intelligent Jewelry
  14. 14. Thin (100‐300um) Bragg fibers in a  white silk matrix, prototype I
  15. 15. Summary Simple Idea Si l Id Developed Within Academic Institution Researchers With Industry Experience Through Boostrapping Financing Core IP Various Market Segments Looking For Partnerships in Development and Market Deployment
  16. 16. Co o c a g g be s Color changing Fibers Maksim Skorobogatiy maksim.skorobogatiy@polymtl.ca Thomas Martinuzzo thomas.martinuzzo@univalor.ca thomas martinuzzo@univalor ca

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