| 摘要 |
An optical pressure sensor includes an optical fiber having a well defined end part and a casing having a cylindrically shaped cavity with an inner diameter that is essentially the same as the outer diameter of fiber. The end of the optical fiber is positioned at a chosen axial position inside the cavity, thereby closing one end of the cavity. A body is positioned in the cavity and has a first, at least partially, reflective surface. The partially reflective surface, fiber, and casing define a chamber. The chamber contains a compressible fluid. At least one of the body and the optical fiber is movably connected to the casing in the axial direction thus to provide a pressure coupling between the chamber and the environment. |
