Luminescence button

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Luminescence button

Luminescence buttons are optical sensors that use UV light to detect luminophores in various materials and thus trigger a switching process . Luminophores are pigments that are stimulated to glow by UV light. This effect is used in various industrial applications.

Areas of application (extract)

An example of this is the labeling of various materials such as B. Bottles. Luminescence sensors are used here to recognize whether a label is on a bottle or not. Since paper contains luminophores, the sensor always switches when a label is in the detection range of the UV light. If a bottle or other product is not provided with a label, there is no switching process, so that such products can subsequently be sorted out using automated labeling.

Another example is the invisible marking of materials with markings containing pigments. Luminescence sensors can be used for sorting different products on the basis of such markings. These sensors can also be used to check painted or primed components.

Possible benefits

The advantage of luminescence scanners compared to other sensors that z. B. switch via a contrast ratio , is that the luminescence scanner works completely independently of the nature of a surface ( shiny , reflective , smooth , rough, etc.). When checking bottle labels, it does not matter what color the bottles to be detected are or whether they are empty or full, for example.

literature

  • Fritz Bandow: Luminescence. Scientific publishing company, Stuttgart 1950, DNB 450225542 .
  • Hans Kittel: paint and varnish and plastic dictionary. Scientific publishing company. Stuttgart 1952, DNB 452426502 .
  • Bernhard Bundschuh, Jörg Himmel: Optical information transmission . Oldenbourg Verlag, Munich / Vienna 2003, ISBN 3-486-27252-7 .
  • Jörg Hoffmann: Pocket book of measurement technology. 5th edition. Hanser Verlag, Leipzig 2007, ISBN 978-3-446-40993-4 .
  • Franz Bader, Friedrich Dorn: Physics in one volume. Schroedel Verlag, 2013, ISBN 978-3-507-10770-0 .
  • Joachim Grehn: Metzler Physics. Schroedel Verlag, 2007, ISBN 978-3-507-10710-6 .