Thin film black coatings based on interference and absorption

Peter Munzert; Stefan Schwinde; Robert Leitel; Sylke Kleinle; Svetlana Shestaeva; Ralph Schlegel; Tobias Herffurth; Sven Schröder

doi:10.1117/12.3022694

24 June 2024 Thin film black coatings based on interference and absorption

Peter Munzert, Stefan Schwinde, Robert Leitel, Sylke Kleinle, Svetlana Shestaeva, Ralph Schlegel, Tobias Herffurth, Sven Schröder

Author Affiliations +

Proceedings Volume 13020, Advances in Optical Thin Films VIII; 1302004 (2024) https://doi.org/10.1117/12.3022694
Event: SPIE Optical Systems Design, 2024, Strasbourg, France

Abstract

Light-absorbing black coatings are indispensable for many different optical applications. Thin-film interference coatings can be flexibly adapted to different wavelengths. To generate an effective (> 99 %) light absorption of an interference coating, the interference effect needs to be combined with a well-defined absorption of the layer’s material. On this basis, different black absorber coatings were developed and deposited on optical components for actual applications. A wideband black absorber for 400 -1000 nm wavelength on a space spectrometer slit, a bi-directional black coating for a single wavelength in the VIS, which can be wet-chemically etched for micro-patterning, and a black aperture for NIR and SWIR light on the exit face of a dispersion prism are presented.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Peter Munzert, Stefan Schwinde, Robert Leitel, Sylke Kleinle, Svetlana Shestaeva, Ralph Schlegel, Tobias Herffurth, and Sven Schröder "Thin film black coatings based on interference and absorption", Proc. SPIE 13020, Advances in Optical Thin Films VIII, 1302004 (24 June 2024); https://doi.org/10.1117/12.3022694

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