J-Black: a stray light coating for optical and infrared systems

Patrick Waddell; David S. Black

doi:10.1117/12.2232159

22 July 2016 J-Black: a stray light coating for optical and infrared systems

Patrick Waddell, David S. Black

Proceedings Volume 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II; 99122T (2016) https://doi.org/10.1117/12.2232159
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

A new stray light coating, called J-Black, has been developed for NASA's Stratospheric Observatory for Infrared Astronomy (SOFIA). The coating is a layered composition of Nextel-Suede 3101 primers and top coats and silicon carbide grit. J-Black has been applied to large areas of the SOFIA airborne telescope and is currently operating within the open cavity environment of the Boeing 747. Over a series of discrete filter bands, from 0.4 to 21 microns, J-Black optical and infrared reflectivity performance is compared with other available coatings. Measured total reflectance values are less than 2% at the longest wavelengths, including at high incidence angles. Detailed surface structure characteristics are also compared via electron and ion microscopy. Environmental tests applicable for aerospace applications are presented, as well as the detailed steps required to apply the coating.

Citation Download Citation

Patrick Waddell and David S. Black "J-Black: a stray light coating for optical and infrared systems", Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99122T (22 July 2016); https://doi.org/10.1117/12.2232159

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