Method and device for measuring at least one transverse dimension of a textile yarn
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United States of America Patent
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Jun 29, 1993
Grant Date -
N/A
app pub date -
Oct 15, 1991
filing date -
Feb 6, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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 which sends a beam (10) onto a cylindrical lens (11). Two axially movable plates (12, 13) are located on opposite sides of the yarn (14) and define two identical slots (15, 16) to form two secondary sources which are arranged to interfere with the coherent light source directed at a lens (17). The transverse dimension of the yarn is deduced from the spacing between the bands (18) of the resulting interference pattern.
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