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ECEG398 Quantum Optics Course Notes Part 2: Thermal Imagers

ECEG398 Quantum Optics Course Notes Part 2: Thermal Imagers. Prof. Charles A. DiMarzio and Prof. Anthony J. Devaney Northeastern University Spring 2006. Thermal Fields. Mean Number (Text Eq.2.141): Std. Deviation (Text Eq. 2.149): Energy Density (Text Eq. 2.151):. Single-Mode Mean.

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ECEG398 Quantum Optics Course Notes Part 2: Thermal Imagers

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  1. ECEG398 Quantum Optics Course NotesPart 2: Thermal Imagers Prof. Charles A. DiMarzio and Prof. Anthony J. Devaney Northeastern University Spring 2006 Chuck DiMarzio, Northeastern University

  2. Thermal Fields • Mean Number (Text Eq.2.141): • Std. Deviation (Text Eq. 2.149): • Energy Density (Text Eq. 2.151): Chuck DiMarzio, Northeastern University

  3. Single-Mode Mean Chuck DiMarzio, Northeastern University

  4. Single Mode SNR Upper Trace is Poisson 0.1mm Chuck DiMarzio, Northeastern University

  5. Spectral Radiant Exitance Ul Watch the Units: Chuck DiMarzio, Northeastern University

  6. Signal & Noise Radiant Exitance Chuck DiMarzio, Northeastern University

  7. Lambert’s Law A’ A Chuck DiMarzio, Northeastern University

  8. Spectral Radiance z dq q y df f x Chuck DiMarzio, Northeastern University

  9. Black-Body Equation (1) Chuck DiMarzio, Northeastern University

  10. m 10 10 m / 2 5 10 , Spectral Radiant Exitance, W/m 0 10 -5 10 -10 10 l M -1 0 1 2 10 10 10 10 l m , Wavelength, m Black Body Equations (2) 10000 5000 2000 500 1000 T=300k Chuck DiMarzio, Northeastern University

  11. Solar Irradiance on Earth Data from The Science of Color, Crowell, 1953 3000 Exoatmospheric filename=m1695.m Sea Level 2 5000 K Black Body Normalized to 1000 W/m 2500 2 6000 K Black Body Normalized to 1560 W/m m m / 2 2000 1500 , Spectral Irradiance, W/m 1000 l E 500 0 0 200 400 600 800 1000 1200 1400 1600 1800 2000 l , Wavelength, nm Chuck DiMarzio, Northeastern University

  12. 6000K Sun 6.9 G Lux Visible Sunlit Cloud 6.9 k Lux Near IR Mid IR Blue Sky 300K night sky Far IR Typical Outdoor Radiance Levels Ultraviolet Atmospheric Passbands Chuck DiMarzio, Northeastern University

  13. Thermal Imaging T = 300 K 1 /Delta T .5 l M D 0 -1 0 1 2 10 10 10 10 T = 500 K 6 /Delta T 4 l 2 M D 0 -1 0 1 2 10 10 10 10 l m , Wavelength, m Chuck DiMarzio, Northeastern University

  14. Etendue AW is Constant NA of Detector Lens Viewed by Pixel Area of PRC Single Mode NA of PRC Pixel Area NA of Objective Chuck DiMarzio, Northeastern University

  15. Spectral Flux (Power) Per Mode Chuck DiMarzio, Northeastern University

  16. Probability Distributions (Poisson) (Delta) (Delta) Laser Mode Re(E) Im(E) |E| |E|2 n (Bose- Einstein) (Gaussian) (Rayleigh) (Exponential) Thermal Mode (Poisson) Many Thermal Modes Summed on Detector Chuck DiMarzio, Northeastern University

  17. Detected Photons (Signal & Bkg) Filter Amp Preamp Ps PBKG BPF hq PNoise Chuck DiMarzio, Northeastern University

  18. Detector Examples: Spectral Photon Radiance 10464-3-32 Chuck DiMarzio, Northeastern University

  19. Detector Examples: Total Background Power 10464-3-31 Chuck DiMarzio, Northeastern University

  20. Noise Photons (Bkg. Limited) Chuck DiMarzio, Northeastern University

  21. Noise-Equivalent Power Chuck DiMarzio, Northeastern University

  22. Detector Examples: NEP 10464-3-3 Chuck DiMarzio, Northeastern University

  23. D-Star Chuck DiMarzio, Northeastern University

  24. Detector Examples: Detectivity, D* 10464-3-34 Chuck DiMarzio, Northeastern University

  25. Estimating the Temperature Chuck DiMarzio, Northeastern University

  26. Noise-Equivalent Delta T Chuck DiMarzio, Northeastern University

  27. Calculating NEDT T=300Kelvin, hq=0.8, B=30 Hz, Dl=1mm, A=(10mm)2, W=0.1 sr NEDT=5 mKelvin 7 X 106 Photons/Kelvin Chuck DiMarzio, Northeastern University

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