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ECE 299 Holography and Coherent Imaging Lecture 1 Gabor Holography David J. Brady Duke University Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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Outline Course objectives What is holography? Gabor holography Modeling coherent fields Simulation of Gabor holograms Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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Course Context Holography and Coherent Imaging is part of a three course sequence in optical systems Courses may be taken in any order Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography ECE 376 Optical Design ECE 375 Optical Imaging and Spectroscopy Holography and Coherent Imaging
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Optical Systems Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography ECE 375 discusses systems with natural light illumination Holography and Coherent Imaging discusses systems with laser illumination ECE 376 considers optical components for either natural or laser illuminated systems
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Course Objectives Students completing this course will be able to 1.Layout analog and digital holographic recording systems 2.Analyze sampling and resolution limits in holographic systems 3.Analyze the information capacity of holograms 4.Analyze broadband hologram and OCT systems 5.Design computer generated holograms 6.Reconstruct images from holographically recorded data 7.Analyze (and maybe reduce) speckle noise in coherent images Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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What is holography? Holography is a method for measuring the electromagnetic “E” field using irradiance detectors. Holography is a type of “homodyne” interferometry Analog holography relies on light induced changes in the dielectric or transmissive properties of materials Digital holography relies on opto-electronic detection Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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Homodyne vs. Heterodyne Detection Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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Gabor Holography Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography A New Microscopic Principle D. GABOR Nature 161, 777 - 778 (1948)
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Gabor Holography Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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Modeling Coherent Fields Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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Scattering Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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Scattering Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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Scattering Limiting object to plane z=0, Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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Holographic Interferometry Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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Holographic Interferometry For monochromatic fields, the integral over time is trivial and Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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Gabor Holography Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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Gabor Holography Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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Gabor Holography Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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Gabor Holography Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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What is the Fringe Frequency? Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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What is the Fringe Frequency? Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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What is the Fringe Frequency? Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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Modeling Gabor Holograms Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography Distance in mm, 5.5 micron sampling period
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Modeling Gabor Holograms Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography Diffracted 8 mm with 0.6 micron wavelength
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Modeling Gabor Holograms Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography Diffracted 36 mm with 0.6 micron wavelength
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Model of Gabor’s Hologram Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography Diffracted 14 mm with 0.6 micron wavelength
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Reconstruction Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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Hologram, reconstruction and pseudoscopic reconstruction at 7 mm range Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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How is this a microscope? Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography
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