The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 20, 2010
Filed:
Jul. 25, 2005
Richard Walter Lea, Leicestershire, GB;
Richard Walter Lea, Leicestershire, GB;
R.W.L. Consultants Limited, Caldecote, Leicestershire, GB;
Abstract
An apparatus for monitoring an access portal through an enclosure around a hazard comprises a line-scan camera mounted above the portal so that its linear field of view extends along a generally opposite threshold of the portal and can detect electromagnetic radiation reflected from an object passing through the portal. The apparatus distinguishes signals from the camera corresponding to items that are intended to pass through the portal for example on a conveyor from signals corresponding to items, particularly intruders that are not intended to pass through the portal. The apparatus preferably comprise an elongate sodium discharge lamp mounted above the portal and provided with a reflector so that monochromatic light therefrom is concentrated in a narrow strip extending along the threshold and the camera is sensitive only to this monochromatic light.