02. September 2020 · Comments Off on Doppelbrechungs Measurement · Categories: News · Tags:

Traversing measuring device with optical sensors Bielefeld, 20.09.2012 – touchscreens, sportswear function, contact lenses, milk cartons, double-walled, aircraft, wind turbines the application range of plastic products seems unlimited. Also components with special optical requirements are now produced from plastics. For this development, the optical disk CD/DVD/BluRay considered crucial drivers of innovation. For these products, the quality of scanning the information stored in a particular way depends on the birefringence. The optical properties are in particular the birefringence in films for optical applications, such as laminated glass or protectors, plastic Windows, lenses or optical sensors of particular relevance. These products will have nearly isotropic optical properties. This means that the propagation speed of light should be equal in all directions to avoid unwanted optical distortions. To check the Birefringence in transmission and reflection coated products may also has developed a versatile sensor system the ISEDD GmbH in Bielefeld.

For laboratory applications it is realized as table tool for fast optical analysis of samples. In conjunction with other analysis methods, such as measurement of diffraction effects and intensities or optical attenuation, it is used among other things to optimize the picture quality and production speed of optical disks in the mastering, in the tool production both in injection moulding. Equipped with an automatic traversing device can be monitored with this sensor system also wide, continuously produced films or plates on different parameters. These inline installed systems allow a continuous quality control in the production of films, and others used for flat screens, televisions, liquid crystal displays (LCD), 3D glasses, etc.. Through the continuous acquisition of the necessary parameters of the production process can be constantly adjust. So it reaches a constant product quality and Committee. At the same time a complete production and batch documentation allows that logged the adherence to established specifications.

So far, traversing systems were realized with process paths to 2,300 mm and travel speeds of up to 1, 400 mm / s. The position deviation between the two sensor heads mounted on electronically coupled linear motors is less than 0, 05 mm. The measuring system continuously delivers birefringence measurement values with a sampling rate of 10 kHz and controls in the case of specification overruns a multi-channel system of marking and warning lights. The specification standard is carried out via the SAP production planning system, where also the recorded measured values are stored. Database access via SQL. The measuring equipment calibrated automatically at specified time intervals by built-in references, where the calibration operations are also stored in the parent database. The traversing system offers as a universal Platform of often falling on the base for the realisation of measurements with a variety of sensors in continuous extrusion or casting processes. Can retrieve more information about oem-lin.isedd.

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