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12 July 2023 Manufacturing of monolithic and butcher block filter arrays for earth observation applications
Thomas Weber, Marc Lappschies, Thorsten Best, Stefan Jakobs, David Harrison, George Allen, Kevin Downing
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Proceedings Volume 12777, International Conference on Space Optics — ICSO 2022; 1277753 (2023) https://doi.org/10.1117/12.2690984
Event: International Conference on Space Optics — ICSO 2022, 2022, Dubrovnik, Croatia
Abstract
Multispectral earth observation is done using selected discrete filter channels. The optical filtering is typically accomplished using optical thin film filters. These filters can be placed in filter wheels or as an array directly in front of the detector. For compact system designs filter arrays are preferred. The manufacturing of filter arrays can be done by two different approaches called monolithic array and butcher block. Typical optical requirements for such filters are for example a filter transmission of above 90% and an out-of-band blocking in OD6 range.
© (2023) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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Thomas Weber, Marc Lappschies, Thorsten Best, Stefan Jakobs, David Harrison, George Allen, and Kevin Downing "Manufacturing of monolithic and butcher block filter arrays for earth observation applications", Proc. SPIE 12777, International Conference on Space Optics — ICSO 2022, 1277753 (12 July 2023); https://doi.org/10.1117/12.2690984
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KEYWORDS
Tunable filters
Coating
Manufacturing
Optical filters
Semiconducting wafers
Optical lithography
Optics manufacturing
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