The image resulting from the measurement of a Cashmere fiber (Figure c) is characterized by thin long bright lines over and under the diffraction plane and it is clearly distinguishable from those of the other synthetic or natural fibers.
The method object of this invention is easy to implement and do not require the use of an expensive and complex equipment. The setup to measure includes a laser light source, a device to mount the fiber, a camera sensor to record the diffraction pattern and a processing unit (e.g. a laptop). The machine is designed to fit in a suitcase in order to be available for measurements on site performed by customs authorities or quality inspectors. The equipment could be further developed and customized in the framework of cooperation with an interested manufacturer.
A German patent application is pending. On behalf of the Niederrhein University of Applied Sciences PROvendis offers licenses and cooperation opportunities to interested companies.