Apparatus for contactless diameter measurement of an essentially cylindrical object for example a fibre optic

摘要

Apparatus for contactless diameter measurement of a substantially cylindrical object, for example an optical fibre This device comprises a laser (4) capable of emitting a light beam, optical means (6, 8, 10) provided in order to form first and second light beams from the light beam emitted by the laser, and for illuminating the object (2) with these first and second light beams, so as to obtain two light beams reflected by the object which interfere with each other, and means (CCD, 14) for photodetection and analysis of the interference between the two reflected beams, which means are capable of determining the diameter of the object from the interference fringes. IMAGE