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:
Mar. 29, 2005
Filed:
Jul. 23, 2003
Michel Emmanuel, Rueil-Malmaison, FR;
Michel Emmanuel, Rueil-Malmaison, FR;
Abstract
Light curtain comprising two long assemblies defining between them an area to be monitored. Each assembly P, Pcomprises with regard to the other assembly a striped surface of lightand dark areasthus forming a grid. A linear or matrix receiver having a suitable optic picks up the image from the grid and the processing means of the two assemblies process the corresponding image signals to send an intrusion signal. Each assembly should preferably have two receivers RH, RB; RH, RBnear its ends and the optic associated to each receiver should cover the whole length of the opposite assembly, and the processing means should carry out a redundant processing of the images of the monitored area.