@inproceedings{73c210a327cf4e8ca16141ad7b9b2aca,
title = "Extending the depth of field in a fixed focus lens using axial colour",
abstract = "We propose a method of extending the depth of field (EDOF) of conventional lenses for a low cost iris recognition front-facing smartphone camera. Longitudinal chromatic aberration (LCA) can be induced in the lens by means of dual wavelength illumination. The EDOF region is then constructed from the sum of the adjacent depths of field from each wavelength illumination. The lens parameters can be found analytically with paraxial raytracing. The extended depth of field is dependant on the glass chosen and position of the near object point.",
keywords = "Chromatic aberration, Extended depth of eld, Iris imaging, Optical design",
author = "Niamh Fitzgerald and Christopher Dainty and Goncharov, \{Alexander V.\}",
note = "Publisher Copyright: {\textcopyright} 2017 SPIE.; International Optical Design Conference 2017, IODC 2017 ; Conference date: 09-07-2017 Through 13-07-2017",
year = "2017",
doi = "10.1117/12.2287600",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Muschaweck, \{Julius A.\} and Rogers, \{John R.\} and Clark, \{Peter P.\} and Pfisterer, \{Richard N.\}",
booktitle = "International Optical Design Conference 2017",
}