Breaking diffraction limit of a small f-number compact camera using wavefront coding
Optics Express, Vol. 16, Issue 18, pp. 13569-13578 (2008)
http://dx.doi.org/10.1364/OE.16.013569
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Abstract
We propose a resolution enhancement method for mobile small f-number compact imaging systems based on wavefront coding and super-resolution image processing. Wavefront coding increases the focus depth of an optical system and produces point spread functions (PSFs) with similar characteristics at different field and defocus positions. The designed target wavefront is realized as a combination of wavefront errors of each rotationally symmetric lens, without including an additional phase plate. Finally, using one deconvolution filter containing all the characteristics of the PSFs, we achieve high resolution, breaking the diffraction limit of small f-number and the resolution limit of the image sensor by super-resolution image processing.
© 2008 Optical Society of America
OCIS Codes
(070.0070) Fourier optics and signal processing : Fourier optics and signal processing
(080.3620) Geometric optics : Lens system design
(110.0110) Imaging systems : Imaging systems
(070.2615) Fourier optics and signal processing : Frequency filtering
(110.3010) Imaging systems : Image reconstruction techniques
ToC Category:
Imaging Systems
History
Original Manuscript: July 2, 2008
Revised Manuscript: August 6, 2008
Manuscript Accepted: August 16, 2008
Published: August 19, 2008
Citation
Sang-Hyuck Lee, No-Cheol Park, and Young-Pil Park, "Breaking diffraction limit of a small f-number compact camera using wavefront coding," Opt. Express 16, 13569-13578 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-18-13569
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References
- K. Kubala, E. R. Dowski, and W. T. Cathey, "Reducing complexity in computational imaging systems," Opt. Express 11, 2102-2108 (2003). [CrossRef] [PubMed]
- E. R. Dowski and W. T. Cathey, "Extended depth of field through wavefront coding," Appl. Opt. 34, 1859-1866 (1995). [CrossRef] [PubMed]
- W. T. Cathey and E. R. Dowski, "New paradigm for imaging systems," Appl. Opt. 41, 6080-6092 (2002).
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