Research Network

With our worldwide network of partners, we form a symbiotic system to constantly stay on the cutting edge of research and development and to continuously evolve new innovations.

For security reasons we cannot publish all of our research projects and details of the work on our website.

Holographic Rainbow Projection in the Foyer of the Federal Ministry of Education & Research

Holographic Rainbow Projection in the Foyer of the Federal Ministry of Education & Research

In cooperation with the IPK of the Fraunhofer Institute Berlin we were able to realize the lens elements used in the art project “Kunst am Bau“ (architectural art) for the new building of the BMBF at the Kapelle-Ufer 1 in Berlin using the process of ultra-precision machining and injection moulding.

In order to decompose the white light of the full-spectrum LED into the color spectrum of a rainbow, the optical elements must have a blazed grating structure, which is a cyclic sequence of sawtooth structures in the nanometer range.

For this purpose, a replication master had to be produced in the laboratory wing of Fraunhofer IPK on a specially modified LT-Ultra ultra-precision manufacturing system, which would map the 40.000 optical structures of the blazed grating without interference and be suitable for the subsequent injection moulding process of the macro-optical base bodies.

The artwork “Virtual Sculpture without Title (Virtuelle Skulptur ohne Titel)” won the title in the competition “Kunst Am Bau” and the artist group around Boran Burchhardt, Andreas Lippke and Marcel Stammen entrusted us with the realization of the optical elements.

Ultrahard Embossing Tools for applying holographic structures in hard metals

The aim of this research project is to produce an ultra-hard embossing die that can be used in the industry for protection against forgeries.

The surface of the embossing die composed of different elements will finally have a hardness of HV 1900 – 2300, which is sufficient to emboss holographic structures in the lateral range of about 400 – 800nm at a wavelength-dependent spatial frequency of 1280-2630 lines/mm directly into metals.

This technique can then be transferred to any embossing die – increasing its value by extending it’s operative life.

Light Concentrators for Photovoltaics

Light concentrators have been shown to increase the efficiency of solar modules. We have already demonstrated this in a feasibility study entitled “Strip-shaped concentrators for broadband radiation to locally increase the efficiency of illuminance while reducing the required area of mono- or polycrystalline silicon”. However, due to the current production advantages in competition by foreign companies, the implementation was stopped. Ecologically and sustainably considered, the realization of the project would be a great progress!