Fabry-Perot fiber interferometer for precise measurements of small displacements comprises an emitting and detecting optical fiber and a deformable reflecting element that follows a displacement that is to be measured

摘要

Fabry-Perot fiber interferometer for absolute measurement of displacements has an optical fiber (1) with a light emitting end that also serves to capture reflected light. The fiber is moved between two points over a deformable reflecting element (3) that has a fixed point (4) and a displaceable point (5) that follows a displacement that is to be measured. The first reflecting element has a through reflecting surface (6) that extends between fixed and displaceable points over which the optical fiber is displaced.