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Markus Grönholm: Terahertz Imaging @ TEDx AaltoUniversityOnTracks

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Markus Grönholm: Terahertz Imaging @ TEDx AaltoUniversityOnTracks

  1. 1. Terahertz Imaging Mankind's new eyeballs <ul><li>Markus Grönholm </li></ul><ul><li>[email_address] </li></ul><ul><li>TEDxAaltoUniversityOnTracks </li></ul><ul><li>2010-05-16 </li></ul>
  2. 2. Terahertz radiation? <ul><li>Thermal radiation </li></ul><ul><ul><li>Every objects emits it </li></ul></ul><ul><ul><li>Depends on temperature </li></ul></ul>Microwaves < THz < IR
  3. 3. Why terahertz? <ul><li>Better penetration than infrared </li></ul><ul><li>Better resolution than microwaves </li></ul><ul><li>-> Reasonable sized optics </li></ul><ul><li>THz can penetrate: </li></ul><ul><ul><li>Plastic </li></ul></ul><ul><ul><li>Dry wood </li></ul></ul><ul><ul><li>Clothes </li></ul></ul><ul><ul><li>Cardboard etc... </li></ul></ul>
  4. 4. And the problem is? <ul><li>No cheap 'n easy... </li></ul><ul><ul><li>Sources </li></ul></ul><ul><ul><li>Detectors </li></ul></ul><ul><li>The Technological Terahertz Gap </li></ul><ul><ul><li>New innovations needed </li></ul></ul>
  5. 5. Why bother?
  6. 6. Why bother? <ul><li>Security </li></ul>
  7. 7. Why bother? <ul><li>Security </li></ul><ul><li>Military </li></ul>
  8. 8. Why bother? <ul><li>Security </li></ul><ul><li>Military </li></ul><ul><li>Medicine </li></ul>
  9. 9. Why bother? <ul><li>Security </li></ul><ul><li>Military </li></ul><ul><li>Medicine </li></ul><ul><li>Industry </li></ul>
  10. 10. Why bother? <ul><li>Security </li></ul><ul><li>Military </li></ul><ul><li>Medicine </li></ul><ul><li>Industry </li></ul><ul><li>Astronomy </li></ul>
  11. 11. Taking a closer look <ul><li>Terrorism </li></ul><ul><li>Detection of non-metallic objects </li></ul><ul><ul><li>e.g. ceramic knives, plastics </li></ul></ul><ul><li>Safe </li></ul><ul><ul><li>No ionizing radiation </li></ul></ul>Security screening
  12. 12. Two approaches <ul><li>Target is illuminated </li></ul><ul><li>Portal-like devices </li></ul><ul><li>Basically a radar </li></ul><ul><li>Very good resolution </li></ul><ul><li>Privacy issues </li></ul>Part 1 1) Active
  13. 13. Two approaches <ul><ul><li>Only body's own emissions </li></ul></ul><ul><ul><li>Device 5 – 10 m away </li></ul></ul><ul><ul><li>Usually requires cryogenics </li></ul></ul><ul><ul><li>No privacy issues </li></ul></ul><ul><ul><li>Some developers: </li></ul></ul><ul><ul><ul><li>NIST ( USA ) </li></ul></ul></ul><ul><ul><ul><li>Jena ( Germany ) </li></ul></ul></ul><ul><ul><ul><li>VTT ( Finland ) </li></ul></ul></ul>Part 2 2) Passive
  14. 14. CONCLUSIONS <ul><li>Final frontier of EM spectrum </li></ul><ul><li>Lots of emerging technologies </li></ul><ul><li>Enables us to see new things </li></ul><ul><li>And old ones in a new light </li></ul>

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