| 摘要 |
Optical pressure sensor comprising an optical fibre (1) having a well defined end part (1A) and a casing (3) having a cylindrically shaped cavity with essentially the same diameter as the optical fiber (1), the end (1A) of the optical fibre being positioned at a chosen axial position inside the cavity thus to close one end of the cavity. A body (2) is positioned in the cavity having a first at least partially reflective surface (2A), said partially reflective surface (2A), fibre (1) and casing (3) defining a chamber (5), said chamber containing a compressible fluid, at least one of said body (2) and the optical fiber (1) being movably connected to the casing in the axial direction thus to provide a pressure coupling between the chamber (5) and the environment.
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