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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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Presentation on theme: "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."— Presentation transcript:

1 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

2 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

3 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

4 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

5 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

6 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

7 Homodyne vs. Heterodyne Detection Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography

8 Gabor Holography Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography A New Microscopic Principle D. GABOR Nature 161, 777 - 778 (1948)

9 Gabor Holography Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography

10 Modeling Coherent Fields Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography

11 Scattering Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography

12 Scattering Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography

13 Scattering Limiting object to plane z=0, Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography

14 Holographic Interferometry Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography

15 Holographic Interferometry For monochromatic fields, the integral over time is trivial and Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography

16 Gabor Holography Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography

17 Gabor Holography Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography

18 Gabor Holography Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography

19 Gabor Holography Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography

20 What is the Fringe Frequency? Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography

21 What is the Fringe Frequency? Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography

22 What is the Fringe Frequency? Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography

23 Modeling Gabor Holograms Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography Distance in mm, 5.5 micron sampling period

24 Modeling Gabor Holograms Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography Diffracted 8 mm with 0.6 micron wavelength

25 Modeling Gabor Holograms Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography Diffracted 36 mm with 0.6 micron wavelength

26 Model of Gabor’s Hologram Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography Diffracted 14 mm with 0.6 micron wavelength

27 Reconstruction Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography

28 Hologram, reconstruction and pseudoscopic reconstruction at 7 mm range Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography

29 How is this a microscope? Lecture 1: Gabor Holographywww.disp.duke.edu/~dbrady/courses/holography

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