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1. (WO2016177914) IMAGE ACQUISITION SYSTEM

Pub. No.:    WO/2016/177914    International Application No.:    PCT/EP2016/060941
Publication Date: Fri Nov 11 00:59:59 CET 2016 International Filing Date: Tue May 17 01:59:59 CEST 2016
IPC: G02B 27/00
G06K 9/00
Applicants: FOTONATION LIMITED
Inventors: CORCORAN, Peter
BIGIOI, Petronel
DAINTY, Christopher
GONCHAROV, Alexander
Title: IMAGE ACQUISITION SYSTEM
Abstract:
An image acquisition system for acquiring iris images for use in biometric recognition of a subject includes an optical system comprising a cluster of at least 2 lenses arranged in front of a common image sensor with each lens optical axis in parallel spaced apart relationship. Each lens has a fixed focus and a different aperture to provide a respective angular field of view. The lens with the closest focus has the smallest aperture and the lens with the farthest focus has the largest aperture so that iris images can be acquired across a focal range of at least from 200mm to 300mm.