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Proceedings Paper

Extended depth of field in an intrinsically wavefront-encoded biometric iris camera
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Paper Abstract

This work describes a design process which greatly increases the depth of field of a simple three-element lens system intended for biometric iris recognition. The system is optimized to produce a point spread function which is insensitive to defocus, so that recorded images may be deconvolved without knowledge of the exact object distance. This is essentially a variation on the technique of wavefront encoding, however the desired encoding effect is achieved by aberrations intrinsic to the lens system itself, without the need for a pupil phase mask.

Paper Details

Date Published: 17 December 2014
PDF: 10 pages
Proc. SPIE 9293, International Optical Design Conference 2014, 92931W (17 December 2014); doi: 10.1117/12.2073312
Show Author Affiliations
Matthew D. Bergkoetter, The Institute of Optics, Univ. of Rochester (United States)
Julie L. Bentley, The Institute of Optics, Univ. of Rochester (United States)


Published in SPIE Proceedings Vol. 9293:
International Optical Design Conference 2014
Mariana Figueiro; Scott Lerner; Julius Muschaweck; John Rogers, Editor(s)

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