19 November 2003 Extended depth of field using the logarithmic asphere
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Proceedings Volume 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life; (2003); doi: 10.1117/12.524150
Event: 19th Congress of the International Commission for Optics: Optics for the Quality of Life, 2002, Florence, Italy
Abstract
Transmission functions are derived for a novel logarithmic aspheric lens that provides an extended depth-of-field when used in an integrated digital processing system. Diffraction-theory equations valid in the non-paraxial case are presented together with a comparative study of two designs. This lens can be used either singly or in conjunction with a standard photographic lens. A tenfold increase in the depth-of-field has been obtained.
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Nicholas George, Wanli Chi, "Extended depth of field using the logarithmic asphere", Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); doi: 10.1117/12.524150; https://doi.org/10.1117/12.524150
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KEYWORDS
Aspheric lenses

Computing systems

Diffraction

Focus stacking

Image processing

Aspheric optics

Digital signal processing

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