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:
Dec. 27, 2005
Filed:
Nov. 23, 2001
Keith Loder Lewis, Malvern, GB;
Gilbert William Smith, Malvern, GB;
Mark Edward Mcnie, Malvern, GB;
Qinetiq Limited, , GB;
Abstract
An optical interference filter () is provided by a substrate () in which is formed a plurality of parallel slots so as to define layers (slots and substrate laminae) of alternating refractive index. As shown, the filter comprises a central Fabry-Perot resonator slot cavity () between two mirror groups () of alternating slots and substrate laminae, and is coupled to optical fibers () accommodated in V-grooves () on either side. For tuning, one mirror group () may be movable in the direction of arrow (A), or, where the central resonator is provided by substrate material, by altering its temperature. One or more further Fabry-Perot filters may be formed in the substrate and coupled to the filter (). The invention encompasses non-resonating filters.