3 November 2003 Micro-optical sensor system for birefringence characterization of textile fibers
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We report a micro-optical sensor system for the on-line characterization of the textile-fiber birefringence in spinning machines. The measurement set-up is using the method of Senarmont but does not require any moving parts in the optical path. This has been achieved by usage of different micro-optical elements in combination with optical fibers for illumination and signal capturing. One of the key-components is an array of micropolarizers made of subwavelength-period metal-stripe gratings fabricated by e-beam direct writing and ion-beam etching. Having a total height of only 6mm the sensor system is extremely flat and thus applicable also in special spinning equipment.
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Uwe D. Zeitner, Uwe D. Zeitner, S. Kaufmann, S. Kaufmann, Ernst-Bernhard Kley, Ernst-Bernhard Kley, } "Micro-optical sensor system for birefringence characterization of textile fibers", Proc. SPIE 5183, Lithographic and Micromachining Techniques for Optical Component Fabrication II, (3 November 2003); doi: 10.1117/12.505443; https://doi.org/10.1117/12.505443


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