IRR images of Ars nova fragments preserved in Nuremberg and Melk

Ivan Shevchuk, Sebastian Bosch & Andreas Janke
Infrared reflectography (IRR) images were captured with an Apollo reflectography camera (Opus Instruments, UK) from Ars nova music fragments preserved in Nuremberg, Stadtbibliothek, Germany (12–13 Februrary 2020, and 18 October 2021), and Melk, Stiftsbibliothek, Austria (21 October 2021). The aim was to verify the presence of carbon in the inks. The regular Short-Wave Infrared (SWIR) sensing range (900–1700 nm) of the 128×128-pixel scanning InGaAs sensor was reduced by a Long Wave Pass Filter (LWP1510, range...
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