Coating free-form surfaces of large optical components

1-dimensional graded, nearly sinusoidal coating thickness on glass substrate (450x450 mm) © Fraunhofer FEP
1-dimensional graded, nearly sinusoidal coating thickness on glass substrate (450x450 mm) © Fraunhofer FEP
The scientists at Fraunhofer FEP have now succeeded in developing new processes and coating technologies that can be used for complex surfaces of large optical components. Specifically, this involves fabrication of lateral gradient layer systems. The objective of this research is to manufacture optical layer systems adapted to applications characterised by variable angles of incidence, such as waveguides in holography, head-up displays, laser illumination, and laser processing systems. One focus has also been adapting the coating technology to larger surfaces, as a trend towards larger substrates with curved surfaces has become apparent.
The results make it feasible to better adapt to specific customer requirements by locally adjusting the optical function of optical multilayer systems. This applies in particular to coatings on large substrates or 3D substrates, where the incident angle of the light locally varies in the application. The optical function now can be adapted to the given incident angle of light
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