Concave diffraction gratings by injection moulding

kdg is a real dynamic company family. On this page we keep you updated with all relevant news about kdg Opticomp and our company group.

Concave diffraction gratings by injection moulding

kdg opticomp R&D project manager Dr. Manuel Walch will talk about a pioneering series of experiments concerning concave diffraction gratings at the upcoming LpS in Bregenz. For the very first time, these complex microstructures can also be replicated by injection moulding.
2018-08-01
The lecture "Injection Moulded Diffraction Gratings on Curved Surfaces. A Breakthrough for a Cost-Effective Industrial Mass-Production" by kdg opticomp R&D project manager Dr. Manuel Walch (here together with kdg opticomp Head of Technology Alexander Wörle) will take place during the LpS on September 26, 2018, at 9.30 a.m. in the Seefoyer of the Festspielhaus Bregenz.
For a company that, like us, comes from optical media production, the casting of micro- and nanostructures is part of daily business. Because every CD, every DVD is based on these structures, which are called pits and lands and run on a spiral line from the inside to the outside. However, here the structures are situated on a planar surface, thus a disc. But microstructures, including diffraction gratings on planar and curved surfaces, are also used for lighting applications in the analytical field. These structures split the incident light into its spectral colours, which in turn form the setup for further analysis. Until now, the required high precision of diffraction gratings on curved surfaces could only be manufactured on glass basis, an equally complex and expensive manufacturing process. 
 
For the first time, kdg opticomp has now succeeded to replicate these diffraction gratings on behalf of a customer by injection moulding with polymers, which will not only immensely accelerate the entire manufacturing process of these complex and demanding optical components, but will also make them trailblazingly cheaper. kdg opticomp R&D project manager Dr. Manuel Walch will report on this ground-breaking series of experiments for the first time at the LED professional Symposium LpS  from 25 to 27 September at the Festspielhaus in Bregenz. In terms of production technology, Walch and his team oriented themselves on the process chain of classic CD/DVD production: that is to say, casting of the submicro- and macrostructure of a master by nickel electroplating as a massive tool insert, then the high-precision replication by injection moulding under mass-production condition. Even if the first tests were realized "only" with a concave diffraction grating, the technology is basically applicable for all applications of microstructures on macroscopic geometries. Walch's explanations on the Lps are therefore likely to cause quite a sensation.