| 摘要 |
A method and device for measuring at least one transverse dimension of a textile yarn using an optical system. The measuring device comprises a coherent light source (s) which sends a beam (10) onto a cylindrical lens (11). Two axially movable plates (12, 13) are located on either side of the yarn (14) and define two identical slots (15, 16) to form two secondary sources which are arranged to interfere by means of an optical system (17). The transverse dimension of the yarn is deduced from the spacing between the bands (18) of the resulting interference pattern. |
