Document imaging with illumination from lambertian surfaces

US5825945A · kind A · utility

Assignee

• Unisys Corporation · US

Inventors

• Paul Stolis · Canton, US
• John Vala · Plymouth, US
• Clive E. Catchpole · Birmingham, US
• Johan P. Bakker · Brighton, US
• Gary Copenhaver · Canton, US
• David J. Concannon · Farmington Hills, US
• Robert T. Rourke · Troy, US
• David J. Valice · Troy, US

Key dates

• Filing date: May 15, 1992
• Grant date: Oct 20, 1998
• Expiry date: May 15, 2012

Classification

• Technology area (CPC G): Physics
• CPC primary: G06K2007/10485
• WIPO field: Control
• WIPO sector: Instruments

Abstract

In a check processing array, an imaging/illumination arrangement for illuminating and imaging checks at one or several imaging sites as they are rapidly, continuously transported past two or more imaging stations, each station having, as its illumination source, a hollow Lambertian integrating vessel, housing lamps which project a highly uniform, diffuse Lambertian illumination-beam to its respective imaging site.