Phase-Modulation Based 3D technology

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This slideshow is my report for a reading club in my company. I'd like to show you some new 3D technology, enjoy!

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Phase-Modulation Based 3D technology

  1. 1. Phase-Modulation Based 3D Optical Visualization for Wide Viewing Zone Osamu Matoba & Nozomu Ueda from Kobe University Chris Huang
  2. 2. Visual perception of human BackgroundObject Reference beam beam Left Right Compile
  3. 3. 3D technologyLeft & right sight Face tracking Phase modulation separation Left Right A B B location A location
  4. 4. Example Toshiba 3D TV Features : • Glass-free (two-eye- viewing separation) • Face tracking (9 viewing positions) • Smart 2D-3D switching • Ridiculously expensive (£7,000 available in Germany only)
  5. 5. Phase ModulationSpatial Light Modulator (SLM) Phase modulation transmissive mode of SLM
  6. 6. Simulation
  7. 7. Resolution : 2048×2048 Pixel size : 8μm×8μmNumerical reconstruction at directions : (a) -20°, (b) -10°, (c) 0°, (d) 10°, (e) 20°
  8. 8. Experiment NDF : neutral density filter BE : beam expander BS : beam splitter LCOS-SLM : liquid crystal on Silicon SLM
  9. 9. Resolution : 1920×1080 Pixel size : 8μm×8μmExp results of reconstructed 3D object at angles : (a) -20°, (b) -10°, (c) 0°, (d) 10°, (e) 20°
  10. 10. How to get the source images ?
  11. 11. Phase Electro-Modulation Holography Super high resolution film
  12. 12. Holography Electro-Holography Image data (input) Laser (backlight) M SLM (output) 3D image
  13. 13. Q : Source ?A : holography with SLM as the film.Q : Limitation ?A : 1. 2.Interference patterns record the Pixel sizes are too larger,“phase” information, but consume much than the wavelength,the resolution. so diffraction angles are almost 0°. M
  14. 14. Comparison Left & right sight Phase modulation Face tracking separation (Electro-holography) 1. Commercially available 1. Real 3D images 1. Real 3D images 2. Photo and Video 2. Full resolution 2. Photo and Video Adv available 3. No visual fatigue available 3. Low data volume in 3. No visual fatigue media files 1. Narrow view angle 1. Extremely big data 1. Very low resolution (naked-eye type) volume (photo only) 2. Narrow view angle 2. Bad user experience 2. Single viewer only due to the large pixel (glass-needed type) 3. High quality front size 3. Non-reasonable / fake camera and efficient 3. MonochromaticDisadv 3D images algorithm required images (transmission 4. Resolution reduction for face detection mode) (some types) 5. Visual fatigues (all types)
  15. 15. Conclusion• 3D images are the future.• The current 3D movies suck, which look fake and uncomfortable.• Electro-holography could be a promising 3D technique.• Full-color electro-hologram might be the next step.
  16. 16. Thank You for Your Attention

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