Development of multi-lambda UV emitters with adapted optical elements and optimized assembly and connection technology
|German title:||Entwicklung von Multi-Lambda-UV-Strahlern mit angepassten Optikelementen und optimierter Aufbau- und Verbindungstechnik|
|Duration:||31st December 2015 - 31st July 2018|
|Description:||The aim of the project was to develop UV-LED-based radiation sources with up to six different wavelengths for selected applications in the fields of "Environment & Life Science", "Production" and "Medicine".
The results flow into further application fields of the consortium "Advanced UV for life" (AUVL).
Main development goals were:
- Homogeneity of illumination,
- wavelength-selective intensity control,
- stability against environmental influences,
- primary beam shaping for effective use of the side emission of UV LEDs.
Various UV-suitable optics were designed by means of optics simulation optimization and fabricated by sol-gel process. Extensive characterization with respect to beam shaping and transmission was subsequently performed. In close coordination with the partners, electronics for controlling the LEDs were developed that can detect and process both the temperature and a monitor signal and adjust the LED currents accordingly.
In addition, for the assembly of the optics, joining methods of parallel projects were adapted so that LEDs of different design and contacting form could be joined on AlN substrates in a confined space. Particular attention was paid to the thermal diffusivity of the joints in order to meet the special thermal requirements of UV LEDs. As a result, 3 bus-capable demonstrators actuate very good optical properties and allow the consortium partners to use up to six different LED sources.
|Funded by:||Federal Ministry of Education & Research|
|Project sponsor:||Projektträger Jülich|
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