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.

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

3. Lens CCDObjects Output Image Traditional Imaging Systems Out of Focus

4. Wave-front Coding LensCCD Objects Intermediate Image Wave-front Coding Optical Element Image Processing Output Image 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.

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

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

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

8. Input Signal System Output Signal H ImpulsePSF PSFs In Focus Out of Focus In Focus Out of Focus PSFs Traditional Imaging SystemWave-front Coding Imaging System

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

10. Spatial Frequency Spatial Frequency High Low

14. Modulation Transfer Functions (MTFs)

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

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

17. Why Wave-front Coding? ObjectLens CCD Wave-front ObjectLens CCD Wave-front

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

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

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

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

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

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

24. 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.

25. System PSFs

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