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Concave Diffraction Gratings by High-Precision Injection Moulding

kdg opticomp GmbH, Am kdg campus, Dorf 91, 6652 Elbigenalp, Austria
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Presented at the Eurosensors 2018 Conference, Graz, Austria, 9–12 September 2018.
Proceedings 2018, 2(13), 717; https://doi.org/10.3390/proceedings2130717
Published: 29 April 2019
(This article belongs to the Proceedings of Eurosensors 2018)
PDF [746 KB, uploaded 29 April 2019]

Abstract

As an example of the applicable process chain, a concave grating (1175 grooves/mm) with an active area of approx. 24 mm to 24 mm has been replicated by means of electroplating and further by injection moulding with polycarbonate, resulting in a surface accuracy even below 4 µm peak-to-valley (PV). The obtained moulds were further metallised with bare aluminium to obtain components for optical applications. To our knowledge, this is the first time that such a large nanostructured nonplanar surface has been manufactured by injection moulding in such an accuracy.
Keywords: high-precision injection moulding; micro-, submicro-, nano-structure; plastic grating; concave; curved surface; nickel electroplating high-precision injection moulding; micro-, submicro-, nano-structure; plastic grating; concave; curved surface; nickel electroplating
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Walch, M.; Wörle, A. Concave Diffraction Gratings by High-Precision Injection Moulding. Proceedings 2018, 2, 717.

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