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Wave-front Coding: A New paradigm for imaging systems

W. Thomas Cathey and Edward R. Dowski W. T. Cathey is with the Department of Electrical and Computer Engineering, University of Colorado. E. R. Dowski is with CDM Optics, Incorporated, 4001 Discovery Drive, Suite 2110, Boulder, Colorado 80303-7816.

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Wave-front Coding: A New paradigm for imaging systems

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  1. W. Thomas Cathey and Edward R. Dowski W. T. Cathey is with the Department of Electrical and Computer Engineering, University of Colorado. E. R. Dowski is with CDM Optics, Incorporated, 4001 Discovery Drive, Suite 2110, Boulder, Colorado 80303-7816. Wave-front Coding:A New paradigm for imaging systems

  2. Traditional Imaging Systems In Focus Lens Objects CCD Output Image

  3. Traditional Imaging Systems Out of Focus Lens Objects CCD Output Image

  4. Wave-front Coding Intermediate Image Objects Wave-front Coding Optical Element Image Processing Lens CCD E. R. Dowski, Jr., and W. T. Cathey, “Extended depth of field through wave-front coding,” Appl. Opt. 34, 1859–1866 1995. Imaging Systems Laboratory, Department of Electrical Engineering, University of Colorado, Boulder, Colorado 80309. Output Image

  5. Traditional Imaging System Wave-front Coding Imaging System Object CCD Object CCD Lens Lens Wave-front Coding Optical Element

  6. Traditional Imaging System Wave-front Coding Imaging System Object CCD Object CCD Lens Lens Wave-front Coding Optical Element

  7. Traditional Imaging System Wave-front Coding Imaging System In Focus In Focus Out of Focus CCD Out of Focus CCD In Focus In Focus PSFs PSFs Out of Focus Out of Focus

  8. H System Impulse PSF Output Signal Input Signal In Focus In Focus PSFs PSFs Out of Focus Out of Focus Traditional Imaging System Wave-front Coding Imaging System

  9. Ambiguity Function A(u,v) Phase Function P(x) u: Spatial Frequency ψ: Misfocus Parameter

  10. Spatial Frequency Low Spatial Frequency High

  11. Modulation Transfer Functions (MTFs)

  12. Wave-front Coding Imaging System PSFs Object CCD Lens Intermediate Image Wave-front Coding Optical Element Phase Surface Image Processing Weiner Filter Output Image

  13. Wave-front Coding Imaging System PSFs Object CCD Lens Intermediate Image Wave-front Coding Optical Element Image Processing Weiner Filter Output Image

  14. Why Wave-front Coding? Wave-front CCD Object Lens Wave-front CCD Object Lens

  15. Applications: Extended Depth of Field Imaging Traditional System Image Extended Depth of Field Image Traces through both images

  16. Applications: Extended Depth of Field Imaging W. T. Cathey and E. Dowski, “A new paradigm for imaging systems,” Appl. Opt. 41, 6080 (2002).

  17. Applications: Actuator Images Traditional Image (a-d)Traditional Image (e) Wave-front Coded Image Wave-front Coded Image

  18. Applications: Fluorescence Imaging Wave-front Coded Image Traditional System Image

  19. Applications: Achromatic Imaging Traditional System Image Wave-front Coded Image

  20. Kenneth Kubala, Edward Dowski, and W. Cathey ,”Reducing complexity in computational imaging systems,” Optics Express, Vol. 11, Issue 18, pp. 2102-2108

  21. Applications: Liquid Lens with Wave-front Coding Chir-Weei Chang and Yung-Lin Chen “Using liquid lens in wavefront coded imaging system,” Proc. SPIE, Vol. 7061, 70610O (2008); DOI:10.1117/12.794930 .

  22. Images of Liquid Lens System Images of Liquid Lens System with Wavefront Coding

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