Teile einer Taschenlampe
© Fraunhofer AWZ Soest, Bernd Ahrens
Eine LED-Leuchte, deren Farbspektrum individuell an die Bedürfnisse angepasst werden kann, soll die Lebensqualität der Nutzer verbessern.

Individual LED lamp for visually handicapped people

An LED light whose color spectrum is adapted to the needs of people with age-related macular degeneration (AMD) or retinopathia pigmentosa (RP) can improve the quality of life of those affected. In the "MakULA - Make Your Light Adapted" project, the Fraunhofer Application Center Soest and the Department of Electrical Power Engineering at the University of Applied Sciences Südwestfalen aim to develop such a solution.

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© Fraunhofer AWZ Soest, Angelika Rebentisch
Die Untersuchung von Proben am Röntgendiffraktometer waren Teil der Forschungsarbeit von Dr. Charlotte Rimbach zur Effizienzsteigerung von lumineszierenden Boratgläsern und -glaskeramiken.

Improving the efficiency of luminescent borate glasses and glass ceramics

Improving the efficiency of luminescent borate glasses and glass ceramics as temperature-stable light converters is a major challenge. A new approach is being pursued by the Fraunhofer Application Center (AWZ) for Inorganic Phosphors in Soest in collaboration with the South Westphalia University of Applied Sciences. By means of targeted modification of the network structure and generation of scattering centers, the efficiency of luminescent systems could be improved.

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© Fachhochschule Südwestfalen/Sandra Pösentrup
Michelle Grüne ist von der Budde-Stiftung für einen neuen Ansatz beim Einsatz lumineszierender Gläser ausgezeichnet worden. Das Motiv zeigt sie bei der Justierung eines Lichtstabs für eine Messung der Lichtstärkeverteilung.

Budde prize research on light converters

Michelle Grüne has been honored by the Budde Foundation for a new approach to the use of luminescent glasses in lighting technology. She received the 5000 euro prize for her master's thesis at the University of Applied Sciences Südwestfalen, which was written in collaboration with the Fraunhofer Application Center for Inorganic Phosphors Soest.

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© Fraunhofer AWZ Soest
Abhängig von ihrer Temperatur können lumineszierende Gläser ihre Lichtfarbe verändern, was eine Anwendung als Temperaturmesser denkbar macht.

Temperature measurement with phosphors

A research team at the Fraunhofer Application Center for Inorganic Phosphors Soest has developed and submitted a patent application for luminescent glass systems that change color according to the temperature. Theses glass systems can be used, for example, for temperature measurement.

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Lumineszierende Gläser leuchten unter ultraviolettem (UV) Licht (oberer Bildteil) und sind unter Raumlicht transparent (unterer Bildteil). Der Farbeindruck wird durch den verwendeten Dotierstoff bestimmt: blau (Thulium), rot (Europium) und grün (Terbium).
© Fraunhofer AWZ Soest
Lumineszierende Gläser leuchten unter ultraviolettem (UV) Licht (oberer Bildteil) und sind unter Raumlicht transparent (unterer Bildteil). Der Farbeindruck wird durch den verwendeten Dotierstoff bestimmt: blau (Thulium), rot (Europium) und grün (Terbium).

Luminescent glass as a basis for new phosphors for op-timizing LEDs

Luminescent glasses can optimize modern light sources for different applications. Current research at the Fraunhofer Application Center in Soest is also evaluating new materials such as luminescent glass ceramics for potential applications.

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Laserlicht
© Hella
HELLA arbeitete gemeinsam mit dem Fraunhofer-Anwendungszentrum für Anorganische Leuchtstoffe an einem möglichen Lichtsystem der Zukunft auf Basis einer Laserlichtquelle.

Step towards a fully adaptive light system based on laser light sources

HELLA GmbH & Co. KGaA, one of the world's leading automotive suppliers for light and electronics, and the Fraunhofer Application Center for Inorganic Phosphors in Soest worked together on a possible light system of the future based on a laser light source.

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Roboter-Goniophotometer
© Fraunhofer AWZ Soest
Mit einem Roboter-Goniophotometer werden am Fraunhofer-Anwendungszentrum in Soest farb- und photometrische Messungen an LED-Modulen und -Leuchten durchgeführt

Positive conclusion: Fraunhofer AWZ established as an important partner for the lighting and illumination industry

In the future, the Fraunhofe AWZ in Soest will also contribute to strengthening the future viability and competitiveness of the lighting and illumination industry. This is the result of an evaluation of the research facility, which was founded in 2013.

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LED Lichttherapie Selbstschulung
© Fraunhofer AWZ Soest
Lichttherapie im Rahmen der Behandlung von Depression: Die für den Prototyp entwickelte LED-Leuchte soll die individualisierte Helligkeit und Farbwahrnehmung des Lichts ermöglichen.

Light Provides Energy

Together with Polaravior® UG, the Fraunhofer Application Center for Inorganic Luminescent Materials is developing an LED light that assists in the treatment of depression.

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Phosphors

Leuchtstoffe Gläser
© Fraunhofer IMWS
Special, rare earth-doped lenses under excitation with UV light.

In recent years, the light-emitting diode (LED) has established itself as a universal artificial light source. Modern high-power LEDs offer numerous advantages in terms of efficiency, compactness, lifetime and environmental protection as compared to conventional incandescent and energy-saving lamps. The tuneability of its light and its small size opens up completely new possibilities for lighting design.

 

Increased demands

As the LED is established as lighting element, the task is now to further develop the technology for increased demands. Light management by intelligent control systems for interactive or automated control and energy saving (»Smart Lighting«) as well as advanced lighting concepts for stimulating the biological effects of light on humans (»Human Centric Lighting«) place new demands on the lighting environment. The digitalisation of processes in product development (»Digital Prototyping«), the networking of luminaires for monitoring the operating status (»Predictive Maintenance«) and for the distributed acquisition of sensor data (»Internet of Things«) also represent tasks for development.

 

New Challenges

New challenges not only consist of improving the LED chips, but also in the phosphors and encapsulation materials. In addition to the efficiency of the LEDs and the phosphor, reliability and colour stability are also important aspects. The thermal management in LEDs and LED modules  is of crucial importance.

 

Research and development

In the field of phosphors, our range of services consists of the evaluation, design, and development of phosphors and phosphor systems with the aim of improving their efficiency, reliability, and colour stability. In order to do so, we apply comprehensive optical and spectroscopic analyses, thermal and microstructural characterizations at the Fraunhofer Application Center in Soest as well as investigations into the long-term stability of light-emitting diodes and lighting elements.

The output of our research activities have led to phosphor-doped glasses and glass ceramics for lighting and lighting technology as well as medical diagnostics. Further research fields include the characterization of optics for light-emitting diodes as well as the microstructuring of optics and phosphors.

Our topics:

  • Characterization and assessment of luminaires, light-emitting diodes and phosphors and their long-term stability
  • Production and development of phosphor doped lenses and glass ceramics
  • Thermal management and photometric und photometric assessment of luminaires, light-emitting diodes (LEDs) and LED modules
  • Surface and element investigations, thermal and thermokinetic analyses
  • Structuring of LED optics and phosphors