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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 26, Iss. 12 — Jun. 15, 2001
  • pp: 875–877

Electronic imaging using a logarithmic asphere

Wanli Chi and Nicholas George  »View Author Affiliations


Optics Letters, Vol. 26, Issue 12, pp. 875-877 (2001)
http://dx.doi.org/10.1364/OL.26.000875


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Abstract

Transmission functions are derived that are valid in the nonparaxial case for a class of lenses that will image a continuum of points along an optical axis to a single image point. This lens, which we call a logarithmic asphere, is then used in a digital camera. The resolution of the camera is limited by the pixel size of the CCD; i.e., it is not diffraction limited. Digital processing is used to recover the image, and image-plane processing is used for speed. We find a tenfold increase in the depth of field over that for the diffraction-limited case.

© 2001 Optical Society of America

OCIS Codes
(100.2000) Image processing : Digital image processing
(170.0110) Medical optics and biotechnology : Imaging systems
(220.3620) Optical design and fabrication : Lens system design

Citation
Wanli Chi and Nicholas George, "Electronic imaging using a logarithmic asphere," Opt. Lett. 26, 875-877 (2001)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-26-12-875

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