Fluorescent or luminescent optical symbol scanner

A hand-held, compact fixed mounted or mobile optical symbol scanner assembly that employs black-light emitting diodes to illuminate luminescent or fluorescent bar code symbols that are invisibly printed or formed the surface of an article. The scanner employs an array of far blue or UV LEDs or laser...

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Bibliographic Details
Main Authors BLACKWELL FRANCIS O.III, HATTERSLEY JOHN R
Format Patent
LanguageEnglish
Published 31.05.2007
Subjects
CALCULATING
COMPUTING
COUNTING
HANDLING RECORD CARRIERS
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
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Summary:A hand-held, compact fixed mounted or mobile optical symbol scanner assembly that employs black-light emitting diodes to illuminate luminescent or fluorescent bar code symbols that are invisibly printed or formed the surface of an article. The scanner employs an array of far blue or UV LEDs or laser diodes. An optional nosepiece or shroud on the distal face of the scanner device limits glare from ambient light and also protects against stray UV light. A filter disposed in advance of the imager device blocks the illuminating wavelength but transmits the luminescent light from the target. With proper selection of optical filters and illumination LED wavelengths, the scanner can be used with inks or dyes that fluoresce when exposed to light in the visible spectrum.
Bibliography:Application Number: US20050290762