Patent ID: 8405822
Filing Date: 2013-03-26
Classification: G01B,G01L,G02B

Abstract:
1. Optical strain gauge comprising a glass fiber, which is provided with a Bragg grating, and a sheath, wherein the sheath comprises the following composition: a mixture of poly-ether ether ketone and an inorganic filler in an admixture of at least 10 percent by weight and maximum 40 percent by weight, with a particle size of 0.08 μm to 12 μm, the outside diameter of the sheath is 0.2 mm to 1.2 mm, the ratio D/d between the outside diameter D of the sheath and the diameter d of the glass fiber is 2 to 6, and a pressure of the sheath on the glass fiber is such that no relative movement between the glass fiber and the sheath can occur.