BRAGG-GITTER-DEHNUNGSMESSER UND VERFAHREN ZUR HERSTELLUNG DIESES DEHNUNGSMESSERS

摘要

A Bragg network extensometer and a method for the production of said extensometer. The extensometer comprises an optical fiber (4) in which at least one Bragg network (R1 ... RN) is formed, in addition to a core (6) which encases the fiber and is buried in a host material (2). Two anchoring means (A1 ... AN) are provided for each Bragg network so that the proof body can be anchored in the host material. Said anchoring means are firmly connected to the core and are placed on each side of the Bragg network corresponding thereto. According to the inventive method, the core is formed around the fiber by co-extrusion. The invention is particularly suitable for use in surveillance of works of art.