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Project PRISM Optronics: Protection & Surveillance

Project PRISM Optronics: Protection & Surveillance. Dr Dirk Bezuidenhout CSIR. Universities Involved. Stellenbosch Physics (Dr E Rohwer) Process Eng (Prof H Knoetze) NMMU Physics (Prof J Engelbrecht) Rhodes Chemistry (Prof T Nyokong) UKZN Computer Science (Prof J-R Tapamo)

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Project PRISM Optronics: Protection & Surveillance

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  1. Project PRISMOptronics: Protection & Surveillance Dr Dirk Bezuidenhout CSIR

  2. Universities Involved • Stellenbosch • Physics (Dr E Rohwer) • Process Eng (Prof H Knoetze) • NMMU • Physics (Prof J Engelbrecht) • Rhodes • Chemistry (Prof T Nyokong) • UKZN • Computer Science (Prof J-R Tapamo) • Physics (Dr V Couling)

  3. Universities Involved • UJ • Electr. & Electronic Eng. (Dr W Clarke) • UP • Mathematics (Dr R Anguelov) • TUT • French South African Technical Institute in Electronics (Prof B van Wyk)

  4. Number of Students • Nine Departments • Eight Disciplines • Number of Students: 22

  5. PRISM-L: Lasers • Light Sources • Countermeasures • Beam Propagation

  6. High-power end-pumped Nd:YLF

  7. Reverse Saturable Absorption

  8. Fibre Laser Laboratory

  9. PRISM-P: Pyrophorics

  10. Pyrophorics • Interface with Project COUPLE

  11. PRISM-M Layout: Missile optics

  12. Semi- conductor Materials

  13. InAs1-XSbX 0.45 3000 3.537 μm 0.35 4000 4.218 μm Wavelength [nm] Bandgap Energy [eV] 0.25 5000 Lattice-matched to GaSb 2 K 6000 8000 0.15 10000 300 K 15000 0.0 0.089 0.2 0.4 0.6 0.8 1.0 InAs Sb mole fraction x InSb Bandgap Modification Bandgap spans strategic 3-7 μm range at low T

  14. p:InAsSb n:InAs n:GaSb Substrate Backside Illumination Development of InAs0.91Sb0.09/GaSb backside-illuminated detector λcut-off ~3.6 μm at 77 K

  15. Optical Limiters: Electronic structure • 2 photon absorption • Singlet states S, triplets T • Cross sections σ • Inter-System Crossing • Desirable properties: • high triplet quantum yield σex >> σg • rapid inter-system crossing • a long lifetime τT in the triplet state • optical stability • High damage thresholds for the material

  16. Metallo-phthalocyanines, MPc Axial substituent Peripheral substituent Unsubstituted MPc Substituted MPc

  17. Symmetry C2v dome shape is energy minimum C2v

  18. Highest Occupied Molecular Orbital

  19. Results

  20. Image Processing

  21. Optical Surveillance Path

  22. Solar Glint

  23. Discreet Pulse Transforms • Develop a method for the decomposition of images into 2D block pulses • Analysis of sea images via discrete pulse decomposition • Characterization of the images of marine background in varying conditions • Developing algorithms for identifying anomalies in a sea image • Algorithms for target detection using the discrete pulse decomposition of the image

  24. Image Processing and Optical Tracking

  25. Optical Tracking

  26. Image Processing

  27. Solving the Heat Scintillation Problem in Images(Rishaad Abdoola)

  28. Robust Real-Time Motion Detection(Petrus Nyathela)

  29. Gated Camera Applications

  30. Stress Induced Birefringence Birefringence Map for doublet

  31. Questions

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