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![References
34
(1) Joseph W. Goodman-Introduction to Fourier optics-Roberts and Co. (2005)
(2) All Optical Three Dimensional Spatio-Temporal Correlator for Automatic
Event Recognition Using a Multiphoton Atomic System Mehjabin S. Monjur, 1,*
Mohamed F. Fouda, 1 and Selim M.
[3] C. Zhang, A.K. Wong, A genetic algorithm for multiple molecular sequence
alignment, Comput. Appl. Biosci. 13 (1997) 565–581.
[4] W. Choe, O.K. Ersoy, M. Bina, Neural network schemes for detecting rare
events in human genomic DNA, Bioinformatics 16 (2000) 1062–1072.
[5] L. Hirschman, J.C. Park, J. Tsujii, L. Wong, C.H. Wu, Accomplishments
and challenges in literature data mining for biology, Bioinformatics 18 (2002)
1553–1561.
[6] DNA sequencing using optical joint Fourier transform A.K. Alqallaf ∗ , A.K.
Cherri Kuwait University, College of Engineering and Petroleum, Electrical
Engineering Department, PO Box 5969, Safat 13060, Kuwait
(7)Comsol Blog website
(8)Wikipedia website
(9)Optalsys website
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Optical volume holograms and their applications
- 1. Optical Volume Hologramsand Their Applications 1 Presented By:Hossein Babashah Optoelectronic Course Professor: Dr.Kavehvash 25 Ordibehesht 1395
- 2.
- 3. History information aboutboth the amplitude and phase of the diffracted Virtually all recording devices for light respond to light intensity. Concept Conventional Holograms RecordingMedium VolumeHologram Applications &Simulation Conclusion 3 In 1948, Dennis Gabor ->lensless imaging process which he called wavefront reconstruction and which we now know as holography. SAR Three-dimensional images British physicist Dennis Gabor won the Nobel Prize in physics in 1971. /35
- 4. Concept: Challenge 4 Problem:How to record, and then later reconstruct both the amplitude and phase of an optical wave? Conventional Holograms RecordingMedium VolumeHologram Applications &Simulation Conclusion/35
- 5.
- 6.
- 7. Gabor Hologram Recording Reconstruction object isassumed to be highly transmissive : RecordingMedium VolumeHologram Applications &Simulation Conclusion 1.highly transmissive 2.Twin images /35 7
- 8.
- 9. The Recording Medium typically some type of film emulsion. Photopolymers Dichromated gelatin Photorefractive materials Silver Halide The transmission of the developed film can be linear in absorbed energy over a limited dynamic range. is the sensitivity parameter of the film VolumeHologram Applications &Simulation Conclusion Silver ion Bromine ion Silver halide lattice
- 10. Silver Halide 10 Silverhalide (e.g. silver bromide) crystal struck by photon.A Br- ion is freed and captured by an Ag+ ion. This forms a latent image. Some photons give its energy to a bromine ion and emit an electron In a short time it loges in a low energy electron trap near the surface of the crystal This low energy electron trap is called a ‘sensitivity spec’ /35 VolumeHologram Applications &Simulation Conclusion
- 11. Thick Hologram(Volume Hologram) Thisis a special condition on the reconstruction wavevector such that there is a particularly strong reconstructed intensity. Applications &Simulation Conclusion Thickness is much larger than the light wavelength used for recording. /35
- 12. 12 Thick Hologram(Volume Hologram) photo-thermo-refractiveglass ultraviolet laser. nonphotosensitive glass femtosecond laser pulses /35 Applications &Simulation Conclusion
- 13.
- 14. Applications Fiber BraggGrating Microscopy and High-Resolution Volume Imagery Vibration Analysis Holographic Display and Holographic Art Holograms for Security Applications Imaging Spectroscopy Acoustical Holography Holographic Data Storage Optical Computing /35 Conclusion
- 15. 15 records volume,differentangles. Magnetic and optical data bits recording and reading millions of bits in parallel0.2 seconds helium–neon laser is red, 632.8 nm wavelength light. store 500 megabytes per cubic millimeter. Holographic data storage /35 Conclusion
- 16. 16 Imaging Spectroscopy Itis possible to tune both the bandwidth and peak transmission wavelength. /35 Conclusion
- 17. 17 Fiber Bragg Grating As an external feedback in particular for semiconductor lasers /35 Conclusion
- 18. 18 wavelength selectivityof volume holograms is used to narrow the spectral emission of semiconductor lasers. Distributed feedback lasers HR — high reflection ratio mirror; AR — antireflection coating. /35 Conclusion
- 19. 19 Digital Holographic Microscopy Superb Depth Equivalent lateral Other related OCT /35 Conclusion
- 20.
- 21. 21 1. TheMatched Filter 2. Optical Neural Network 3. The Joint Transform Correlator Optical Computing /35 Conclusion
- 22. 22 1.Matched Filter(MF) Vanderlugt Filter The Matched Filter Vanderlugt Filter /35 Conclusion
- 23. Optical Neural Networks theexposure times or the strengths of the waves used in recording these gratings determine their diffraction efficiencies, and therefore control the weights that they will apply to incident Bragg-aligned plane waves. /35 Conclusion
- 24. 24 The necessities Liquid Crystal Light valve Exposure Time Optical Neural Networks /35 Conclusion
- 25.
- 26. 26 Modulation Procedure ((ewfd.normE)/maxop1(ewfd.normE) )>threshold /35 Conclusion
- 27.
- 28. 28 More Realistic Simulation /35Conclusion
- 29. 29 Laser Beam Divergence waistradius ten times the wavelength=> /35 Conclusion
- 30.
- 31. 31 Interference Pattern Modulated RefractiveIndex Mesh Problem 0.2micrometer 1hour with Core i5 Ram 4GB But Should be 0.1micrometer !!!! /35 Conclusion
- 32.
- 33. Conclusion We havelearned holography and its appllications!! Promising application of holography in optical computing Comsol Multiphysics as a tool for optic simulation 33 /35
- 34. References 34 (1) Joseph W.Goodman-Introduction to Fourier optics-Roberts and Co. (2005) (2) All Optical Three Dimensional Spatio-Temporal Correlator for Automatic Event Recognition Using a Multiphoton Atomic System Mehjabin S. Monjur, 1,* Mohamed F. Fouda, 1 and Selim M. [3] C. Zhang, A.K. Wong, A genetic algorithm for multiple molecular sequence alignment, Comput. Appl. Biosci. 13 (1997) 565–581. [4] W. Choe, O.K. Ersoy, M. Bina, Neural network schemes for detecting rare events in human genomic DNA, Bioinformatics 16 (2000) 1062–1072. [5] L. Hirschman, J.C. Park, J. Tsujii, L. Wong, C.H. Wu, Accomplishments and challenges in literature data mining for biology, Bioinformatics 18 (2002) 1553–1561. [6] DNA sequencing using optical joint Fourier transform A.K. Alqallaf ∗ , A.K. Cherri Kuwait University, College of Engineering and Petroleum, Electrical Engineering Department, PO Box 5969, Safat 13060, Kuwait (7)Comsol Blog website (8)Wikipedia website (9)Optalsys website /35
- 35. ? Your Questions Thanks forYourAttention 35 /35
Editor's Notes
- #16 Sensitivity refers to the extent of refractive index modulation produced per unit of exposure. Diffraction efficiency is proportional to the square of the index modulation times the effective thickness. The dynamic range determines how many holograms may be multiplexed in a single volume data. Spatial light modulators (SLM) are pixelated input devices (liquid crystal panels), used to imprint the data to be stored on the object beam.
- #17 Imaging spectroscopy can be achieved by selecting a single wavelength for each pixel in a full camera field.Volume holograms are used as tunable optical filters to produce monochromatic images, also known as hyperspectral imaging.
- #20 Commonly, a microscope objective is used to collect the object wave front.
- #23 strict alignment criteria and long optical train. high spacebandwidth product and extremely fast process time. The process involves taking the individual Fourier Transforms of the “Input” and “reference” images, taking their product and then Fourier Transforming the result.