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. 23, 2013
Filed:
Mar. 12, 2004
Richard M Jenkins, Worcestershire, GB;
Mark E Mcnie, Worcestershire, GB;
David J Combes, Worcestershire, GB;
James Mcquillan, Worcestershire, GB;
Richard M Jenkins, Worcestershire, GB;
Mark E McNie, Worcestershire, GB;
David J Combes, Worcestershire, GB;
James McQuillan, Worcestershire, GB;
Qinetiq Limited, London, GB;
Abstract
A variable optical attenuator device is described that comprises a first optical input, a first optical output, a first optical path between the first optical input and the first optical output, and means for moving a shutter across said first optical path. A hollow core waveguide is provided to substantially guide light along the first optical path of the device. The device may also be used to provide an analogue beam splitting or switch function in telecommunication systems and the like.