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E MERGING E LECTRONIC I MAGING S YSTEMS

Research projects and goals in electronic imaging systems, including extended depth-of-field, logarithmic lens, CCD digital display, and novel imaging algorithms.

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E MERGING E LECTRONIC I MAGING S YSTEMS

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  1. EMERGING ELECTRONIC IMAGING SYSTEMS Nicholas George ngeorge@troi.cc.rochester.edu February, 2002

  2. RESEARCHPROJECTSANDGOALS NICHOLASGEORGE, PRINCIPALINVESTIGATOR DOCTORALSCHOLARSASLISTED ELECTRONIC IMAGING SYSTEMS, THE INSTITUTEOF OPTICS, ROCHESTER

  3. WANLI CHI NICHOLAS GEORGE SMARTCAMERAFOR EXTENDED DEPTH-OF-FIELD d LOGARITHMIC LENS* CCD DIGITAL COMPUTER DISPLAY s ALGORITHM OBJECTIVE EXTENDED DEPTH-OF-FIELD USING INTEGRATED IMAGING & PROCESSING NOVEL LOGARITHMIC ASPHERE APPROACH SINGLE ELEMENT OPTICS OSLO NONLINEAR DIGITAL RECOVERY MAX ENTROPY * W. CHI and N. GEORGE, OPT. LETT. 26, 875 (2001). March 2002

  4. DC DISPLAY NOVEL LENS CONCEPT: WANLI CHI NICHOLAS GEORGE INTEGRATED COMPUTATIONAL IMAGING SYSTEM APPROACH/RESULT ALL DIGITAL SIMULATION FILTER IDEA SIGNAL NOISE RATIO RESOLUTION IMAGE QUALITY WIDE APPLICATION AREA SINGLE USE CAMERA DVD PICKUP MICROSCOPE DIGITAL VIDEO OBJECTIVE EXTENDED DEPTH-OF-FIELD EXTENDED FIELD OF VIEW ACHROMATIC IMAGING OTHER March 2002

  5. DIGITAL RECOVERY COMPARISON: WANLI CHI NICHOLAS GEORGE MAX ENTROPY VS. INVERSE FILTER MAX ENTROPY HIGH RESOLUTION, LOW NOISE INVERSE FILTER MAGNIFIED NOISE March 2002

  6. FOURIER OPTICAL ANALYSIS OF GRIN ARRAY IMAGING XI CHEN NICHOLAS GEORGE EXPERIMENTAL SETUP OBJECTIVES O • y1 Fourier optical imaging theory x1 (6) (7) • z Improve the depth of field d1 d2 L • (1) (4) (3) (5) (2) Analyze misalignment GRINLINEARSYSTEM • Analyze and correct aberrations APPROACH • THEORY RESULTS Fourier optics analysis coupled with geometrical optics for both a single GRIN rod and GRIN array • GRIN lens system is analyzed by Fourier optics • EXPERIMENT • PSF for a single GRIN rod and the whole array Measure LSF, MTF and Fourier transform pattern • GRIN lens has Fourier transform planes (6;4) March 2002

  7. MEASUREMENT OF LSF AND MTF • Knife edge as the object • Production quality test (misalignment) LSF LSF 25 45 40 20 35 30 Intensity (relative) 15 25 lntensity (relative) 20 10 15 5 10 5 0 March 2002 0 50 100 150 200 250 300 0 0 50 100 150 200 250 300 Distance (um) Distance (um)

  8. DIGITAL COMPUTER CCD OPTICS IMAGE INTENSIFIER KEDARKHARE NICHOLAS GEORGE SPECKLE IN SCANNING AND IMAGING SYSTEMS OBJECTIVES SPECIALITIES APPLICATIONS STUDY SPECKLE NOISE IN IMAGES UNDERSTAND SPECKLE FORMATION FROM SPATIAL DISTRIBUTION OF PHOTONS WAVELENGTH DEPENDENCE PHOTON COUNTING OBJECT RECOGNITION ATMOSPHERIC TURBULENCE LASER SCANNERS & PRINTERS REMOTE SENSING NIGHT VISION ULTRASOUND March 2002

  9. RECENT EXPERIMENTS SYSTEM FOR LOW LIGHT LEVEL IMAGING HIGH LIGHT LEVEL SPECKLE PATTERN SPECKLE PATTERN WITH ~100 PHOTONS March 2002

  10. LIGHT SCATTERING AND PATTERN RECOGNITION OF PATHOGENIC STRUCTURES Weizhen Yan Nicholas George S HOE Computer INTERFACE COMPUTER RECOGNITION P B OUTPUT 1 cm F RWD TRENCH BASED • APPROACH/RESULT • RWD IS RECOGNIZED COUNTING TECHNIQUE FOR SORTING PARTICLES WITH GREAT ACCURACY • TECHNIQUE PIONEERED BY US : OPTICS LETTERS (1991) • SOFTWARE FOR HIGH DENSITY: 10,000 COUNTS AND FOR LOW DENSITY: <10 PARTICLES • APPLY NEW ALGORITHM IN THE PATTERN • RECOGNITION FIELD OBJECTIVE WITH AN EMPHASIS ON AUTOMATIC PATTERN RECOGNITION, THE OBJECTIVE IS TO DEVISE AN INTEGRATED CHIP-SCALE SYSTEM FOR COUNTING AND CLASSIFYING BIOLOGICAL AGENTS IN THE SIZE RANGE FROM 0.5 µm TO 100 µm. March 2002

  11. S.cerevisiae LIGHT SCATTERING AND PATTERN RECOGNITION OF PATHOGENIC STRUCTURES Weizhen Yan Nicholas George DIFFRACTION PATTERN IMAGE 6 µm Polymer Sphere 3rd ring March 2002

  12. Rapid Precision Contouring of 3-D Objects Christopher Ditchman Nicholas George L / 2 x20 q H H L L Structured Illumination Contouring Achromatic Phase Shifter (Pat. Appl.) Objectives Approach • Measure the 3-dimensional surface profile of an object using the projection of structured illumination • Explore theoretical system resolution limits • Implement sub-system improvement • Illumination / measurement • Data processing • Data display • Achromatic Phase Shifter (George and Stone, 1988) • Multiple Wavelength Imaging • External Laser Stabilization • Improved Processing Algorithms March 2002

  13. Wade Cook Nicholas George HOLOGRAPHY & VIBROMETRYOF NON-RIGID OBJECTS March 2002

  14. Transmission vs. Wavelength 0 -1 -2 Transmission (dB) -3 -4 -5 1200 1300 1400 1500 1600 Wavelength (nm) Holographic Interference Filters for IR: Fabrication Damon Diehl Nicholas George Objective Approach Interference filters for use at IR communication wavelengths: Holographic exposure techniques utilizing the following technologies: • Reflection filters • Multi-band reflection filters • Fabry-Perot transmission filters • Photopolymer films • Tunable dye laser • Precisely controlled exposure angles March 2002

  15. Tunable dye laser beam Peak Wavelength of HIF vs. Exposure Angle + - 1700 EXPERIMENT 1600 THEORY prism 1500 Peak Wavelength (nm) 1400 photopolymer black glass 1300 1200 1100 -10° -8° -6° -4° -2° 0° Exposure Angle Holographic Interference Filters for IR: Design Curves Damon Diehl Nicholas George Objective Approach Design curves for a prism-coupled TIR system relating the following features: Create computer models that use the following techniques: • Exposureangle to Peak wavelength • Index modulation to Bandwidth • Thickness to Efficiency • Thin film decomposition • Floquet-Bloch theory • Finite difference, time domain • Couple wave analysis March 2002

  16. ELECTRONIC IMAGING CHAIN Institute of Optics, N. George, 2002

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