DEVICE AND METHOD FOR OPTICALLY SCANNING A MOVING TEXTILE MATERIAL

摘要

The invention relates to a device (1) for optically scanning a moving textile material (9), e.g., yarn, comprising a path (91) for the textile material (9). At least two light sources (21, 22), which are arranged at various locations and emit light (71, 72) having various spectral properties, each illuminate a respective illumination area (81, 82) of the path (91). A light detector (6) detects light originating from the various illumination areas (81, 82). At least one field stop (52) allows only light (75) from a scanning area (85) that is a subset of the intersection of all illumination areas (81, 82) to hit the light detector (6). Thus, the textile material (9) is scanned by means of all involved light components (73, 74).